WO2025244085A1 - Cosmetic base and cosmetic - Google Patents

Abstract

The present invention provides: (i) a cosmetic base comprising a polyether polyol represented by formula (1): HO-\{(GL)_a/(CH₂CH₂O)_b/(CH₂CH₂CH₂O)_c\}-H (the definition of the symbols in the formula is as described in the specification), and a cosmetic containing the cosmetic base; (ii) a skin cosmetic containing the polyether polyol; and (iii) an emulsion cosmetic containing the polyether polyol.

Description

Cosmetic bases and cosmetics

The present invention relates to (i) a cosmetic base comprising a polyether polyol and a cosmetic containing said cosmetic base, (ii) a skin cosmetic, and (iii) an emulsion cosmetic. Hereinafter, the invention relating to a cosmetic base comprising a polyether polyol and a cosmetic containing said cosmetic base may be referred to as the "first invention," the invention relating to a skin cosmetic as the "second invention," and the invention relating to an emulsion cosmetic as the "third invention."

Skin care cosmetics such as lotions, emulsions, and creams used for moisturizing and skin care often contain polyhydric alcohols such as glycerin and water-soluble polymers such as hyaluronic acid to enhance their moisturizing effects. However, when polyhydric alcohols and water-soluble polymers are incorporated into cosmetics in large amounts, they can lead to a poor sensation of use, such as stickiness and poor skin compatibility. In response to this, it has been disclosed that the use of specific polyether polyols in topical skin preparations or cosmetics can improve moisturizing power, sensation of use, and skin compatibility (Patent Documents 1 to 3).

Furthermore, by imparting a glossy finish to the skin immediately after use, skin care cosmetics can be felt immediately after application, enhancing the user's sense of satisfaction. One known method of imparting gloss is to incorporate silicone oils such as methylphenylpolysiloxane (Patent Document 4).

Furthermore, emulsion cosmetics have two basic properties: the ability to provide moisture to the skin and the ability to prevent moisture evaporation from the skin. Polyhydric alcohols such as glycerin are blended in emulsion cosmetics to enhance these properties, but blending a large amount of polyhydric alcohol into an emulsion cosmetic can make it feel sticky after application. In this regard, Patent Document 5 describes an oil-in-water type topical skin composition containing a specific alkylene oxide derivative as being non-sticky.

Furthermore, by incorporating an oil such as petrolatum into an emulsion cosmetic, it is possible to enhance its adhesion to the skin. For example, Patent Document 6 describes that an emulsion composition containing a sufficient amount of petrolatum has an excellent feel when used and provides long-lasting, good moisturizing properties.

Furthermore, because emulsions and creams are often used after applying lotion or after bathing, it is important that they blend well with wet skin. However, because the skin surface is hydrophobic, moisture does not blend well with the skin, and there is the problem that even if an emulsion cosmetic is applied while moisture remains on the skin, it does not penetrate well. A common method of improving compatibility with wet skin is to incorporate surfactants or large amounts of oily ingredients into the emulsion cosmetic. For example, Patent Document 7 describes that an oil-in-water skin cosmetic containing a hydrocarbon oil and isostearic acid has excellent compatibility with wet skin.

Japanese Patent Application Laid-Open No. 2004-83541 Japanese Patent Application Laid-Open No. 2020-105123 JP 2016-204278 A JP 2017-81881 A Japanese Patent Application Laid-Open No. 2005-139094 International Publication No. 2009/014061 JP 2011-136963 A

First Invention: In cosmetics (e.g., cleansing oils, oily creams, etc.) containing oils and other oily agents as their main ingredients, there is a growing demand for the incorporation of an amphiphilic polyether polyol that has high compatibility with both water and oils, in order to improve moisturizing power and provide an excellent feel when used. However, no amphiphilic polyether polyol has been disclosed that has high compatibility with water and hydrocarbon oils in addition to excellent moisturizing power and feel when used.

In recent years, there has been a growing need for skin care cosmetics that not only offer a good feel and moisturizing effect, but also have the effect of preventing shine. By incorporating powders with sebum adsorption properties, such as silica, into cosmetics, it is possible to expect shine to be reduced. However, the use of such powders can result in insufficient moisturizing power for the cosmetics, or the unique feel of the powder can make the cosmetics feel worse when used. Furthermore, Patent Document 2 discloses a skin cosmetic that has a shine-reducing effect by using a specific polyether polyol and proteoglycan. However, while this skin cosmetic is excellent at preventing shine immediately after application, the durability of the shine-reducing effect is insufficient.

The first invention was conceived in light of the above-mentioned circumstances, and its purpose is to provide a cosmetic base that has excellent compatibility with water and oils, as well as a cosmetic that has excellent moisturizing effects, is non-sticky, and has a long-lasting shine-suppressing effect.

As the skin care cosmetic of the second invention , those that spread smoothly over the skin without catching, providing a smooth feeling during application and excellent elasticity after application are preferred. In this regard, the topical skin preparation of Patent Document 1 and the cosmetic of Patent Document 3 leave room for improvement in terms of the smooth feeling during application or the elasticity after application.

Furthermore, as described in Patent Document 4, when silicone oil is blended into aqueous cosmetics, a large amount of surfactant must be added, which poses the problem of impairing the smooth feeling of the aqueous cosmetics during application, and it is not possible to sufficiently achieve both gloss and a good feel when used.

The second invention was conceived in light of the above-mentioned circumstances, and its purpose is to provide a skin cosmetic that blends well with the skin, provides a smooth feeling during application, provides elasticity after application, and has excellent gloss-imparting and moisturizing effects.

Third Invention: In summer, during exercise, or when wearing a mask, skin tends to become shiny even after wiping away sweat and sebum, so there is a growing need for a durable anti-shine effect. However, the topical skin preparation described in Patent Document 5 was insufficient in terms of the durability of the anti-shine effect. In addition, the emulsion composition described in Patent Document 6 had problems such as thickening during application, making it difficult to spread evenly, and leaving a sticky feeling after drying. In addition, the oil-in-water skin cosmetic described in Patent Document 7 had room for improvement in terms of adhesion to the skin.

The third invention was conceived in light of the above-mentioned circumstances, and its purpose is to provide an emulsion cosmetic that blends well with wet skin, inhibits thickening, provides a good adhesion, is non-sticky, and has a long-lasting shine-suppressing effect.

As a result of extensive research, the inventors have discovered that a cosmetic base made from a specific polyether polyol, and a cosmetic containing said cosmetic base, can achieve the object of the first invention.

Furthermore, as a result of extensive research, the inventors have discovered that a skin cosmetic containing a specific polyether polyol can achieve the object of the second invention.

Furthermore, as a result of extensive research, the present inventors have discovered that an emulsion cosmetic containing a specific polyether polyol can achieve the third object of the present invention.
The present invention based on the above findings is as follows.

[1] Formula (1):
HO-{(GL) _a / (CH ₂ CH ₂ O) _b / (CH ₂ CH ₂ CH ₂ O) _c }-H (1)
[In the formula,
GL is a glycerin residue,
a, b, and c are the average degrees of polymerization of GL, CH ₂ CH ₂ O, and CH ₂ CH ₂ CH ₂ O, respectively;
a is a number from 0 to 30,
b is a number from 0 to 80,
c is a number from 1 to 70;
a+b are numbers from 1 to 90,
(a+b)/c is a number from 0.2 to 8, and when a is 0, b/c is a number from 1 to 8.
A cosmetic base comprising a polyether polyol represented by the formula:
[2] A cosmetic comprising the cosmetic base according to [1] above in an amount of 0.1 to 30% by mass based on the total amount of the cosmetic.

[3] The following components (a2) to (d2):
(a2) the cosmetic base according to the above [1],
(b2) a polyhydric alcohol having 3 to 9 carbon atoms;
A skin cosmetic comprising (c2) a thickener and (d2) water,
A skin cosmetic, in which the content of component (a2) is 0.1 to 10 mass %, the content of component (b2) is 1 to 30 mass %, and the content of component (c2) is 0.01 to 10 mass %, based on the total weight of the skin cosmetic.

[4] The following components (a3) to (d3):
(a3) the cosmetic base according to the above [1],
(b3) oil agent,
An emulsion cosmetic comprising (c3) a nonionic surfactant and (d3) water,
An emulsion cosmetic in which the content of component (a3) is 0.1 to 30 mass%, the content of component (b3) is 1 to 50 mass%, the content of component (c3) is 0.1 to 10 mass%, and the content of component (d3) is 15 to 98 mass%, based on the total mass of the emulsion cosmetic.
[5] The following component (e3):
(e3) The emulsion cosmetic according to the above [4], further comprising a thickener.

The first invention provides a cosmetic base that is highly compatible with water and oils. Cosmetics containing this cosmetic base have excellent moisturizing effects, are non-sticky, and have a long-lasting shine-suppressing effect.

The second invention provides a skin cosmetic that blends well with the skin, provides a smooth feeling during application, provides elasticity after application, and provides a glossy finish and moisturizing effect.

The third invention provides an emulsified cosmetic that blends well with wet skin, inhibits thickening, adheres well to the skin, is non-sticky, and has a long-lasting shine-reducing effect.

In this specification, numerical ranges defined using "~" are intended to include the numerical values at both ends of the "~" (upper and lower limits). For example, "2 to 5" means 2 or more and 5 or less.

<Cosmetic base (polyether polyol of the present invention)>
The cosmetic base of the first invention is represented by the formula (1):
HO-{(GL) _a / (CH ₂ CH ₂ O) _b / (CH ₂ CH ₂ CH ₂ O) _c }-H (1)
In the second invention, the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) is used as component (a2), and in the third invention, the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) is used as component (a3).

The polyether polyols of the present invention may be used alone or in combination of two or more. The definitions of the symbols in formula (1) are explained below.

In formula (1), GL is a glycerin residue. Here, "glycerin residue" refers to a group represented by formula (2) or formula (3):

The glycerin residue may be a group formed from a compound other than glycerin, as long as it is a group having a structure represented by formula (2) or formula (3). Hereinafter, "a group represented by formula (2)" and "a group represented by formula (3)" may be abbreviated as "group (2)" and "group (3)," respectively. In group (2), the hydroxy groups at the 1st and 3rd positions of glycerin are used for bonding, and in group (3), the hydroxy groups at the 1st and 2nd positions of glycerin are used for bonding.

When GL (glycerin residue) is present in the polyether polyol of the present invention, both group (2) and group (3) may be present. When GL (glycerin residue) is present in the polyether polyol of the present invention, both group (2) and group (3) are preferably present.

When GL (glycerin residue) is present in the polyether polyol of the present invention, (i) in the first invention, from the viewpoint of suppressing stickiness and prolonging the duration of the anti-gloss effect in the cosmetic, (ii) in the second invention, from the viewpoint of gloss-imparting effect, and (iii) in the third invention, from the viewpoint of non-stickiness in the cosmetic, the molar ratio of group (2)/group (3) is preferably 40/60 to 99/1, more preferably 40/60 to 90/10, and even more preferably 50/50 to 80/20. The molar ratio of group (2)/group (3) can be calculated by ^13C -NMR measurement. Specifically, the molar ratio of group (2)/group (3) can be calculated by comparing the integral value of the signal of the methine carbon of group (2) (near 71 ppm) with the integral value of the signal of the methine carbon of group (3) (near 79 ppm).

In formula (1), CH ₂ CH ₂ O is an ethylene glycol residue. Here, "ethylene glycol residue" refers to a group having a structure in which one hydroxy group (HO-) is removed from ethylene glycol (HO-CH ₂ CH ₂ -OH) and a hydrogen atom (H) is removed from the other hydroxy group (-OH).

In formula (1), CH ₂ CH ₂ CH ₂ O is a 1,3-propanediol residue. Here, "1,3-propanediol residue" refers to a group having a structure in which one hydroxy group (HO-) is removed from 1,3-propanediol (HO-CH ₂ CH ₂ CH ₂ -OH) and a hydrogen atom (H) is removed from the other hydroxy group (-OH).

The slash "/" in _{formula (1) indicates that there is no limitation on the order of GL, CH2CH2O , and CH2CH2CH2O , i.e.} , they may be present in any order. Therefore, (i) GL, _CH2CH2O , and _CH2CH2CH2O may be randomly bonded to each other, (ii) any one _or more of _{GL , CH2CH2O} , and _CH2CH2CH2O may form a block with the _same ones, or (iii) GL, _CH2CH2O , and _CH2CH2CH2O may be bonded to include both of the above ( _{i )} and (ii) embodiments. For example, a plurality of _CH2CH2O may form a block, _{and this block} , GL, and _CH2CH2CH2O may be randomly _{bonded .} When three or more CH ₂ CH ₂ O groups are present in one molecule, it is preferred that a (CH ₂ CH ₂ O) ₃ block is formed.

In formula (1), a, b, and c are the average degrees of polymerization of GL, CH ₂ CH ₂ O, and CH ₂ CH ₂ CH ₂ O, respectively. Therefore, these may all be decimal numbers.

(i) In the first invention, from the viewpoint of compatibility with oils and fats, anti-stickiness, and durability of the anti-gloss effect; (ii) in the second invention, from the viewpoint of compatibility with skin and a smooth feeling; (iii) in the third invention, from the viewpoint of compatibility with wet skin, non-stickiness, and durability of the anti-thickening and anti-gloss effect, a is a number from 0 to 30, preferably a number from 0 to 15, and more preferably a number from 0 to 10. Here, "a is 0" means that GL is absent. (i) In the first invention, when b is 0, a is preferably a number from 2 to 10, more preferably a number from 3 to 10, from the viewpoint of compatibility with oils and fats and anti-stickiness. (ii) In the second invention, when b is 0, a is preferably a number from 2 to 15, more preferably a number from 3 to 10. (iii) In the third invention, when b is 0, a is preferably a number from 2 to 10, more preferably a number from 3 to 10, from the viewpoint of non-stickiness.

(i) In the first invention, from the viewpoint of compatibility with oils and fats, moisturizing effect, and durability of the oil-reducing effect; (ii) in the second invention, from the viewpoint of smooth feeling; and (iii) in the third invention, from the viewpoint of compatibility with wet skin, non-stickiness, and durability of thickening suppression and oil-reducing effect, b is a number from 0 to 80, preferably a number from 0 to 50, and more preferably a number from 0 to 30. Here, "b is 0" means that CH ₂ CH ₂ O is not present. When a is 0, (i) in the first invention, from the viewpoint of durability of the oil-reducing effect, (ii) in the second invention, from the viewpoint of smooth feeling; and (iii) in the third invention, from the viewpoint of durability of the non-stickiness and durability of the oil-reducing effect, b is preferably a number from 4 to 30, and more preferably a number from 5 to 20.

(i) In the first invention, from the viewpoint of anti-stickiness and durability of the anti-gloss effect; (ii) in the second invention, from the viewpoint of a smooth feeling; and (iii) in the third invention, from the viewpoint of non-stickiness and durability of the anti-thickening and anti-gloss effect, a+b is a number from 1 to 90, preferably a number from 2 to 70, more preferably a number from 3 to 60, even more preferably a number from 3 to 30, and particularly preferably a number from 3 to 15.

(i) In the first invention, from the viewpoint of compatibility with water and moisturizing effect; (ii) in the second invention, from the viewpoint of elasticity; and (iii) in the third invention, from the viewpoint of adhesion, c is a number from 1 to 70, preferably a number from 2 to 40, more preferably a number from 4 to 30, even more preferably a number from 4 to 20, and particularly preferably a number from 4 to 15.

(i) In the first invention, from the viewpoints of compatibility with water, compatibility with oils and fats, stickiness suppression, and durability of the shine-suppressing effect; (ii) in the second invention, from the viewpoints of smoothness and shine-imparting effect; and (iii) in the third invention, from the viewpoints of compatibility with wet skin, adhesion, non-stickiness, and durability of the shine-suppressing effect, (a+b)/c is a number from 0.2 to 8, preferably a number from 0.25 to 5, and more preferably a number from 0.3 to 4.

When a is 0, (i) in the first invention, from the viewpoint of compatibility with water, suppression of stickiness, and durability of the anti-shine effect, (ii) in the second invention, from the viewpoint of smoothness and shine-imparting effects, and (iii) in the third invention, from the viewpoint of non-stickiness and durability of the anti-shine effect, b/c is a number from 1 to 8, preferably a number from 1.2 to 5, and more preferably a number from 1.25 to 4.

(i) In the first invention, from the viewpoint of suppressing stickiness; (ii) in the second invention, from the viewpoint of achieving a smooth feeling; and (iii) in the third invention, from the viewpoint of achieving a good adhesion, no stickiness, and suppressing thickening, the weight-average molecular weight (Mw) of the polyether polyol of the present invention calculated from a chromatogram obtained by gel permeation chromatography measurement is preferably 300 to 10,000, more preferably 500 to 8,000, even more preferably 500 to 5,000, and particularly preferably 500 to 2,500.

The polyether polyol of the present invention can be produced by known methods. For example, the polyether polyol of the present invention can be produced by dehydration condensation of a polyhydric alcohol in the presence of an acid catalyst such as sulfuric acid at 80°C to 130°C and atmospheric pressure. After dehydration condensation, it is preferable to neutralize the remaining acid catalyst with a base such as potassium hydroxide and remove the resulting salt.

<Cosmetics>
The first invention also provides a cosmetic comprising the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) in an amount of 0.1 to 30 mass % based on the total amount of the cosmetic. The cosmetic base of the first invention may be used alone or in combination of two or more types.

The cosmetic base of the first invention (i.e., the polyether polyol of the present invention) functions as a feel improver, moisturizer, emulsifier, etc. in cosmetics. By using the cosmetic base of the first invention, cosmetics can be obtained that have excellent moisturizing effects, are non-sticky, and have long-lasting shine-suppressing effects.

The cosmetic of the first invention is not particularly limited and may be any of aqueous cosmetics, water-in-oil or oil-in-water emulsion cosmetics, and oil-based cosmetics. Examples of cosmetics include skin care cosmetics such as lotions, serums, emulsions, creams, packs, and sunscreen creams; body cosmetics; makeup removers such as cleansing oils and cleansing waters; skin cosmetics such as body soaps, hand soaps, and facial cleansing pastes; hair cosmetics such as shampoos, treatments, hair liquids, hair oils, hair tonics, and hair growth agents; and makeup cosmetics such as makeup bases, liquid foundations, and BB creams.

The content of the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) is 0.1 to 30% by mass, preferably 0.5 to 15% by mass, of the entire cosmetic of the first invention, from the viewpoint of suppressing stickiness.

The cosmetic of the first invention preferably contains water (more preferably purified water). Furthermore, the cosmetic of the first invention may contain other components different from the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) and water, as needed, as long as the effects of the first invention are not impaired. There are no particular limitations on the other components, as long as they are components commonly used in cosmetics. Examples of other components include humectants, hydrocarbons, higher alcohols, higher fatty acids and their triglycerides, ester oils, animal and vegetable oils, silicones, vitamins, UV absorbers, water-soluble polymers, antioxidants, cationic surfactants, anionic surfactants, amphoteric surfactants, nonionic surfactants, sequestering agents, ethanol, thickeners, preservatives, colorings, pigments, and fragrances. Only one type of other component may be used, or two or more types may be used in combination.

When the cosmetic of the first invention is a lotion and other ingredients are used, the total amount of the other ingredients is preferably 0.1 to 80% by mass, and more preferably 0.5 to 40% by mass, of the entire lotion of the first invention, from the viewpoints of moisturizing effect, freshness, and feel when used (e.g., a refreshing feeling). Water is the remainder of the lotion of the first invention (i.e., the remainder of the lotion other than the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) and other ingredients).

When the cosmetic of the first invention is a cream, liquid foundation, or sunscreen cream and other ingredients are used, the total amount of the other ingredients is preferably 5 to 99% by mass, and more preferably 10 to 85% by mass, of the entire cream, liquid foundation, or sunscreen cream of the first invention, from the viewpoint of emollient effect and moisture evaporation inhibitory effect. Water is the remainder of the cream, liquid foundation, or sunscreen cream of the first invention (i.e., the remainder of the cream, liquid foundation, or sunscreen cream other than the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) and other ingredients).

When the cosmetic of the first invention is a shampoo or body soap and other ingredients are used, the total amount of the other ingredients is, from the standpoint of cleansing performance, preferably 5 to 80% by mass, and more preferably 10 to 60% by mass, based on the entire shampoo or body soap of the first invention. Water is the remainder of the shampoo or body soap of the first invention (i.e., the remainder of the shampoo or body soap other than the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) and other ingredients).

When the cosmetic of the first invention is a treatment and other ingredients are used, the total amount of the other ingredients is preferably 10 to 90% by mass, and more preferably 15 to 80% by mass, of the entire treatment of the first invention, from the standpoint of emollient effect and moisture evaporation inhibitory effect. Water is the remainder of the treatment of the first invention (i.e., the remainder of the treatment other than the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) and other ingredients).

When the cosmetic of the first invention is a cream and other ingredients are used, the total amount of the other ingredients is preferably 5 to 99% by mass, and more preferably 10 to 85% by mass, of the entire cream of the first invention, from the viewpoint of emollient effect and moisture evaporation inhibitory effect.

When the cosmetic of the first invention is a cleansing oil and other ingredients are used, the total amount of the other ingredients is preferably 40 to 99.5% by mass, and more preferably 60 to 99.0% by mass, based on the total amount of the cleansing oil of the first invention, from the standpoint of cleansing performance.

When the cosmetic of the first invention is a cleansing water and other ingredients are used, the total amount of the other ingredients is preferably 2 to 80% by mass, and more preferably 5 to 60% by mass, based on the entire cleansing water of the first invention, from the viewpoint of cleansing performance. Note that water is the remainder of the cleansing water of the first invention (i.e., the remainder of the cleansing water other than the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) and other ingredients).

When the cosmetic of the first invention is a facial cleansing paste and other ingredients are used, the total amount of the other ingredients is preferably 15 to 95% by mass, and more preferably 30 to 85% by mass, of the entire facial cleansing paste of the first invention, from the standpoint of cleansing performance. Water is the remainder of the facial cleansing paste of the first invention (i.e., the remainder of the facial cleansing paste other than the cosmetic base of the first invention (i.e., the polyether polyol of the present invention) and other ingredients).

<Skin cosmetics>
The skin cosmetic of the second invention contains the following components (a2) to (d2). Each component will be explained below.

[Component (a2)]
The skin cosmetic of the second invention contains the polyether polyol of the present invention as component (a2). The polyether polyol of the present invention may be used alone or in combination of two or more types.

The content of component (a2) is 0.1 to 10% by mass, preferably 0.3 to 10% by mass, and more preferably 0.5 to 5% by mass, based on the total amount of the skin cosmetic. If the content is less than 0.1% by mass, there is a risk that the skin compatibility, smooth feeling, elasticity, gloss-imparting effect, or moisturizing effect may be impaired. Furthermore, if the content exceeds 10% by mass, there is a risk that the smooth feeling may not be achieved.

[Component (b2)]
The skin cosmetic of the second invention contains, as component (b2), a polyhydric alcohol having 3 to 9 carbon atoms. The polyhydric alcohol having 3 to 9 carbon atoms may be used alone or in combination of two or more types.

The number of carbon atoms in the polyhydric alcohol is preferably 3 to 6 from the viewpoint of smooth feeling.
The number of hydroxy groups in the polyhydric alcohol is preferably 2 to 6, more preferably 2 to 4, from the viewpoint of smooth feeling.

Examples of polyhydric alcohols having 3 to 9 carbon atoms include propylene glycol (also known as 1,2-propanediol), 1,3-propanediol, dipropylene glycol (also known as 4-oxa-2,6-heptanediol), 1,3-butylene glycol (also known as 1,3-butanediol), pentylene glycol (also known as 1,2-pentanediol), isoprene glycol (also known as 3-methyl-1,3-butanediol), 1,2-hexanediol, 1,6-hexanediol, glycerin, diglycerin, polyglycerin-3, erythritol, threitol, arabitol, xylitol, ribitol, iditol, galactitol, sorbitol, and mannitol.

Component (b2) is
Preferably, it is at least one selected from the group consisting of glycerin, diglycerin, polyglycerin-3, propylene glycol, 1,3-propanediol, dipropylene glycol, 1,3-butylene glycol, pentylene glycol, and 1,2-hexanediol;
Glycerin is more preferred.

The content of component (b2) is 1 to 30% by mass, preferably 5 to 20% by mass, based on the total weight of the skin cosmetic. If the content is less than 1% by mass, the elasticity, gloss-imparting effect, or moisturizing effect may be impaired. If the content is more than 30% by mass, the skin compatibility, smoothness, or gloss-imparting effect may be impaired.

[Component (c2)]
The skin cosmetic of the second invention contains a thickener as component (c2). The thickener may be used alone or in combination of two or more types.

The viscosity of the aqueous thickener solution at a temperature of 25°C, a pH of 6, and a concentration of 1% by mass (hereinafter referred to as "viscosity (25°C, pH: 6, 1% by mass)") is preferably 500 to 1,200,000 mPa·s, more preferably 500 to 250,000 mPa·s, and even more preferably 1,000 to 200,000 mPa·s, from the viewpoints of smoothness, elasticity, and gloss-imparting effects. When measuring the viscosity of the aqueous thickener solution (25°C, pH: 6, 1% by mass), if the pH of the aqueous thickener solution at a concentration of 1% by mass is higher than 6, the pH is adjusted to 6 using citric acid, and if the pH of the aqueous thickener solution at a concentration of 1% by mass is lower than 6, the pH is adjusted to 6 using potassium hydroxide. The viscosity is an indicator of the size of the thickener. The viscosity can be measured using a single cylindrical rotational viscometer (B-type viscometer) as described in the 18th Edition of the Japanese Pharmacopoeia.

Thickeners include, for example, natural polysaccharides such as carrageenan, xanthan gum, dextrin, methylcellulose, chitosan, and hyaluronic acid Na (also known as sodium hyaluronate), semi-synthetic polysaccharides such as ethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose, polyvinyl alcohol, polyacrylic acid, polymethacrylic acid, carboxyvinyl polymer (hereinafter referred to as "carbomer"), and (acrylates/alkyl acrylate (C10-30)) crosspolymer (INCI name: Acrylates/C10-30 Examples include synthetic polymers such as Alkyl Acrylate Crosspolymer, PEG-240/Decyltetradeceth-20/HDI Copolymer (INCI name: PEG-240/HDI Copolymer Bis-Decyltetradeceth-20 Ether), and Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer (INCI name: Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer). Here, "Sodium Hyaluronate," "Acrylates/C10-30 Alkyl Acrylate Crosspolymer," "PEG-240/Decyltetradeceth-20/HDI Copolymer," and "Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer" are all cosmetic labeling names provided by the Japan Cosmetic Industry Association.

Component (c2) is
Preferably, the surfactant is at least one selected from the group consisting of xanthan gum, sodium hyaluronate, hydroxyethyl cellulose, carbomer, (acrylates/C10-30 alkyl acrylate) crosspolymer, (PEG-240/decyltetradeceth-20/HDI) copolymer, and (hydroxyethyl acrylate/sodium acryloyldimethyltaurate) copolymer;
More preferably, the surfactant is at least one selected from the group consisting of xanthan gum, carbomer, (acrylates/C10-30 alkyl acrylate) crosspolymer, (PEG-240/decyltetradeceth-20/HDI) copolymer, and (hydroxyethyl acrylate/sodium acryloyldimethyltaurate) copolymer;
More preferably, it is at least one selected from the group consisting of xanthan gum and carbomer.

The content of component (c2) is 0.01 to 10% by mass, more preferably 0.01 to 5% by mass, and even more preferably 0.03 to 1% by mass, based on the total amount of the skin cosmetic. If the content is less than 0.01% by mass, the effects of imparting smoothness, elasticity, and shine may be impaired. If the content exceeds 10% by mass, the effects of imparting smoothness or shine may be impaired.

[Component (d2)]
The skin cosmetic of the second invention contains water as component (d2). The content of component (d2) (water) is the remainder of the skin cosmetic other than components (a2) to (c2), and optionally component (e2) and other components.

[Component (e2)]
The skin cosmetic of the second invention may contain a pH adjuster as component (e2) to adjust its pH to a desired range. The pH adjuster may be used alone or in combination of two or more.

There are no particular limitations on the pH adjuster, as long as it is one that can normally be used in cosmetics, and both basic and acidic substances can be used.

Examples of basic substances include sodium hydroxide, potassium hydroxide, lysine, arginine, and sodium citrate. The basic substance is preferably at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, arginine, and sodium citrate, and more preferably at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, arginine, and sodium citrate.

Examples of acidic substances include citric acid, succinic acid, phosphoric acid, glycolic acid, tartaric acid, lactic acid, aspartic acid, glutamic acid, and carbonic acid. The acidic substance is preferably at least one selected from the group consisting of citric acid, succinic acid, and phosphoric acid, and more preferably citric acid.

Component (e2) is
Preferably, the acid is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, arginine, sodium citrate, citric acid, succinic acid, and phosphoric acid;
More preferably, it is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, arginine, sodium citrate, and citric acid.

When component (e2) is used, the content of component (e2) is adjusted so that the pH of the skin cosmetic of the second invention falls within the desired range. The pH of the skin cosmetic of the second invention is preferably 4 to 8, more preferably 5 to 7.

[Other ingredients]
The skin cosmetic of the second invention may contain other components different from components (a2) to (e2) as needed, as long as the effects of the second invention are not impaired. There are no particular limitations on the other components, as long as they are components commonly used in skin cosmetic preparations. Examples of other components include hydrocarbons, monohydric higher alcohols, polyhydric alcohols having 10 or more carbon atoms (e.g., ethylhexylglycerin, PEG-32), higher fatty acids and their triglycerides, ester oils, animal and vegetable oils and fats, vitamins, ultraviolet absorbers, antioxidants, cationic surfactants, anionic surfactants, amphoteric surfactants, nonionic surfactants, sequestering agents, ethanol, preservatives, coloring matter, pigments, and fragrances. Only one type of other component may be used, or two or more types may be used in combination.

If other ingredients are used, the total amount of the other ingredients is preferably 0.001 to 80% by mass, more preferably 0.1 to 40% by mass, based on the total skin cosmetic product, from the viewpoints of smoothness, elasticity, gloss-imparting effects, and moisturizing effects.

<Emulsified cosmetics>
The emulsion cosmetic of the third invention contains the following components (a3) to (d3). Each component will be explained below.

[Component (a3)]
The emulsion cosmetic of the third invention contains the polyether polyol of the present invention as component (a3). The polyether polyol of the present invention may be used alone or in combination of two or more types.

The content of component (a3) in the third invention is 0.1 to 30% by mass, preferably 0.2 to 10% by mass, and more preferably 0.5 to 5% by mass, based on the total emulsion cosmetic. If the content is less than 0.1% by mass, it may not be possible to obtain good compatibility with wet skin, adhesion, or a sustained shine-suppressing effect. Furthermore, if the content exceeds 30% by mass, it may not be possible to obtain the effects of suppressing thickening and preventing stickiness.

[Component (b3)]
The emulsion cosmetic of the third invention contains an oil as component (b3). Only one oil may be used, or two or more may be used in combination. The oil is not particularly limited as long as it can be incorporated into ordinary cosmetics. The oil may be either a polar oil or a non-polar oil.

Examples of polar oils include triglycerides, ester oils, fatty acids, and higher alcohols.
Examples of triglycerides include olive oil, camellia oil, castor oil, safflower oil, soybean oil, tea seed oil, cacao butter, coconut oil, sunflower oil, hardened coconut oil, palm oil, Japan wax oil, hardened castor oil, etc. Among these, olive oil, camellia oil, castor oil, safflower oil, and sunflower oil are preferred, and olive oil and camellia oil are more preferred.

Examples of ester oils include diisobutyl adipate, diisopropyl sebacate, isononyl isononanoate, cetyl ethylhexanoate, isopropyl myristate, cetyl octanoate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, and ethyl oleate. Of these, diisopropyl sebacate, isononyl isononanoate, cetyl ethylhexanoate, isopropyl myristate, isopropyl palmitate, and ethyl oleate are preferred, with diisopropyl sebacate, isononyl isononanoate, and cetyl ethylhexanoate being more preferred.

Fatty acids include, for example, stearic acid, oleic acid, linoleic acid, isostearic acid, palmitic acid, etc.

Examples of higher alcohols include stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, cetyl alcohol, and batyl alcohol. Of these, stearyl alcohol, behenyl alcohol, and cetyl alcohol are preferred.

Examples of non-polar oils include hydrocarbon oils and silicone oils.
Examples of hydrocarbon oils include squalane, liquid paraffin, liquid isoparaffin, petrolatum, dodecane, isododecane, tetradecane, hexadecane, hydrogenated polyisobutene, etc. Among these, squalane, petrolatum, dodecane, isododecane, and hydrogenated polyisobutene are preferred, and squalane, dodecane, and hydrogenated polyisobutene are more preferred.

Examples of silicone oils include dimethicone (also known as "dimethylpolysiloxane"), cyclic silicones (e.g., cyclopentasiloxane, cyclohexasiloxane), polymethylcyclosiloxane, polyether-modified methylpolysiloxane, and amino-modified dimethylpolysiloxane. Of these, dimethicone and cyclic silicones are preferred, with dimethicone and cyclopentasiloxane being more preferred.

In one embodiment of the third invention, component (b3) is preferably at least one selected from the group consisting of olive oil, camellia oil, cetyl ethylhexanoate, diisopropyl sebacate, isononyl isononanoate, squalane, dodecane, hydrogenated polyisobutene, dimethicone, and cyclopentasiloxane.

In one embodiment of the third invention, component (b3) is
Preferably, a combination of a polar oil and a non-polar oil is used.
More preferably, it is a combination of at least one polar oil selected from the group consisting of triglycerides and ester oils and at least one non-polar oil selected from the group consisting of hydrocarbon oils and silicone oils,
More preferably, it is a combination of at least one polar oil selected from the group consisting of triglycerides and ester oils and a hydrocarbon oil (non-polar oil),
Particularly preferred is a combination of a triglyceride (polar oil) and a hydrocarbon oil (non-polar oil).

In one embodiment of the third invention, component (b3) is
Preferably, the combination of at least one polar oil selected from the group consisting of olive oil, camellia oil, cetyl ethylhexanoate, diisopropyl sebacate, and isononyl isononanoate and at least one non-polar oil selected from the group consisting of squalane, dodecane, hydrogenated polyisobutene, dimethicone, and cyclopentasiloxane;
More preferably, it is a combination of at least one polar oil selected from the group consisting of olive oil, camellia oil, cetyl ethylhexanoate, diisopropyl sebacate, and isononyl isononanoate, and at least one non-polar oil selected from the group consisting of squalane, dodecane, and hydrogenated polyisobutene;
More preferred is a combination of at least one polar oil selected from the group consisting of olive oil and camellia oil and at least one non-polar oil selected from the group consisting of squalane, dodecane, and hydrogenated polyisobutene.

When a combination of polar oil and non-polar oil is used as component (b3), the mass ratio of polar oil to non-polar oil (hereinafter sometimes abbreviated as "polar oil:non-polar oil") is preferably 10:1 to 1:1, more preferably 8:1 to 2:1, when the emulsion cosmetic of the third invention is an oil-in-water (o/w) emulsion. When the emulsion cosmetic of the third invention is a water-in-oil (w/o) emulsion, the polar oil:non-polar oil ratio is preferably 1:1 to 1:25, more preferably 1:2 to 1:10.

The content of component (b3) is 1 to 50% by mass, preferably 1 to 45% by mass, based on the total weight of the emulsion cosmetic. It is even more preferably 1 to 35% by mass, and especially preferably 1 to 30% by mass. If the content is less than 1% by mass, the cosmetic may not blend well with wet skin, resulting in a decreased sense of adhesion. If the content exceeds 50% by mass, the cosmetic may become less stable, thicken during application, and become sticky.

When the emulsion cosmetic of the third invention is an oil-in-water (o/w) emulsion, the content of component (b3) is preferably 1 to 40% by mass, more preferably 1 to 30% by mass, and even more preferably 1 to 20% by mass, based on the total emulsion cosmetic.

When the emulsion cosmetic of the third invention is a water-in-oil (w/o) emulsion, the content of component (b3) is preferably 1 to 45% by mass, more preferably 5 to 35% by mass, and even more preferably 5 to 30% by mass, based on the total emulsion cosmetic.

[Component (c3)]
The emulsion cosmetic of the third invention contains a nonionic surfactant as component (c3). The nonionic surfactant may be used alone or in combination of two or more types.

There are no particular restrictions on nonionic surfactants, as long as they can normally be incorporated into cosmetics, but nonionic surfactants with an HLB value of 2 to 18 are preferred. HLB value stands for Hydrophile-Lipophile Balance Value, and is a numerical representation of the balance between the hydrophilic and lipophilic groups of a surfactant. HLB values are generally numbers between 0 and 20, with higher HLB values indicating a more hydrophilic surfactant.

The HLB value can be calculated using the following formula (α), (β), or (γ):

(HLB value of polyoxyethylene type nonionic surfactant)
HLB value = (amount of oxyethylene chain (% by mass) + amount of polyhydric alcohol moiety (% by mass)) / 5 (α)
The standard for the amount is the entire surfactant for which the HLB value is calculated. The "polyhydric alcohol portion" refers to the portion having a structure obtained by removing the hydroxy group used for bonding to the oxyethylene chain from the polyhydric alcohol.

(HLB value of polyhydric alcohol fatty acid ester type nonionic surfactant)
HLB value=20×(1-S/A) (β)
(In formula (β), S is the saponification value (mg KOH/g) of the ester, which is the surfactant, and A is the acid value (mg KOH/g) of the fatty acid, which is the raw material for the surfactant.)

(HLB value of polyether-modified silicone nonionic surfactant)
HLB value = 20 x (molecular weight of hydrophilic group / molecular weight of entire surfactant) (γ)

Examples of the nonionic surfactant of component (c3) include polyoxyethylene-type nonionic surfactants, polyhydric alcohol fatty acid ester-type nonionic surfactants, and polyether-modified silicone-type nonionic surfactants.

Examples of polyoxyethylene-type nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene polyhydric alcohol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, etc. Specific examples thereof include laureth-7 (HLB value: 11.0), steareth-20 (HLB value: 15.0), trideceth-12 (HLB value: 14.5), PPG-4 ceteth-20 (HLB value: 16.5), PPG-13 decyltetradeceth-24 (HLB value: 10.1), PEG-20 hydrogenated castor oil (HLB value: 10.0), PEG-10 glyceryl tristearate (HLB value: 5.0), PEG-10 glyceryl triisostearate (HLB value: 5.0), PEG-10 glyceryl trioleate (HLB value: 5.0), PEG-3 glyceryl isostearate (HLB value: 6.0), PEG-10 glyceryl diisostearate (HLB value: 6.0), and PEG-10 glyceryl diisostearate (HLB value: 6.0). PEG-40 stearate (HLB value: 17.0), sorbeth-30 tetraisostearate (HLB value: 11.1), sorbeth-6 tetraoleate (HLB value: 5.0), polyoxyethylene sorbitan monostearate (HLB value: 15.0), polyoxyethylene sorbitan monooleate (HLB value: 15.0), etc.

Examples of polyhydric alcohol fatty acid ester-type nonionic surfactants include polyglycerin fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, and sucrose fatty acid esters. Specific examples include polyglyceryl-2 isostearate (HLB value: 5.0), polyglyceryl-2 oleate (HLB value: 5.5), polyglyceryl-4 isostearate (HLB value: 5.0), polyglyceryl-4 oleate (HLB value: 6.0), polyglyceryl-10 tristearate (HLB value: 7.5), polyglyceryl-10 trioleate (HLB value: 7.0), and polyglyceryl-10 diisostearate (HLB value: 10.0). , polyglyceryl-10 laurate (HLB value: 16.0), polyglyceryl-10 oleate (HLB value: 12), polyglyceryl-10 stearate (HLB value: 14.0), glyceryl monostearate (HLB value: 3.0), glyceryl monolaurate (HLB value: 5), glyceryl monooleate (HLB value: 5.0), sorbitan monostearate (HLB value: 4.5), sucrose stearate (HLB value: 11.0), etc.

Examples of polyether-modified silicone nonionic surfactants include PEG-10 dimethicone (HLB value: 4.0) and PEG-9 polydimethylsiloxyethyl dimethicone (HLB value: 4.0).

In one embodiment of the third invention, component (c3) is
Preferably, the surfactant is at least one selected from the group consisting of polyoxyethylene-type nonionic surfactants, polyhydric alcohol fatty acid ester-type nonionic surfactants, and polyether-modified silicone-type nonionic surfactants,
More preferably, it is at least one selected from the group consisting of PEG-40 stearate, polyoxyethylene sorbitan monostearate, polyglyceryl-10 laurate, polyglyceryl-10 oleate, glyceryl monostearate, glyceryl monolaurate, and PEG-10 dimethicone;
More preferably, it is at least one selected from the group consisting of polyglyceryl-10 laurate, polyglyceryl-10 oleate, glyceryl monostearate, and glyceryl monolaurate.

In one embodiment of the third invention, component (c3) is preferably a combination of a nonionic surfactant having an HLB value of less than 10 and a nonionic surfactant having an HLB value of 10 or more. Emulsion cosmetics containing such a combination have excellent emulsion stability, and as a result, are excellent in terms of compatibility with wet skin and lack of stickiness.

In one embodiment of the third invention, component (c3) is
More preferably, it is a combination of at least one nonionic surfactant having an HLB value of less than 10 selected from the group consisting of glyceryl monostearate, glyceryl monolaurate, and PEG-10 dimethicone, and at least one nonionic surfactant having an HLB value of 10 or more selected from the group consisting of PEG-40 stearate, polyoxyethylene sorbitan monostearate, polyglyceryl-10 laurate, and polyglyceryl-10 oleate,
More preferred is a combination of at least one nonionic surfactant having an HLB value of less than 10 selected from the group consisting of glyceryl monostearate and glyceryl monolaurate, and at least one nonionic surfactant having an HLB value of 10 or more selected from the group consisting of polyglyceryl-10 laurate and polyglyceryl-10 oleate.

When a combination of a nonionic surfactant with an HLB value of less than 10 and a nonionic surfactant with an HLB value of 10 or greater is used as component (c3), the mass ratio of the nonionic surfactant with an HLB value of less than 10 to the nonionic surfactant with an HLB value of 10 or greater (hereinafter sometimes abbreviated as "(HLB less than 10):(HLB 10 or greater)") is preferably 1:15 to 2:1, more preferably 1:5 to 1:1, when the emulsion cosmetic of the third invention is an oil-in-water (o/w) emulsion. When the emulsion cosmetic of the third invention is a water-in-oil (w/o) emulsion, the mass ratio of (HLB less than 10):(HLB 10 or greater) is preferably 1:1 to 15:1, more preferably 2:1 to 5:1.

The content of component (c3) in the emulsion cosmetic of the third invention is 0.1 to 10% by mass of the entire emulsion cosmetic. If the content of component (c3) is greater than 10% by mass, it can cause stickiness, resulting in poor compatibility with wet skin and a lack of stickiness. The content is preferably 0.1 to 8% by mass, and more preferably 0.1 to 5% by mass.

[Component (d3)]
The cosmetic of the third invention contains water as component (d3). Water commonly used in cosmetics, pharmaceuticals, etc., such as ion-exchanged water or purified water, can be used as component (d3). The content of component (d3) is 15 to 98% by mass, preferably 20 to 95% by mass, more preferably 30 to 92% by mass, and even more preferably 40 to 90% by mass, based on the total mass of the emulsion cosmetic.

When the emulsion cosmetic of the third invention is an oil-in-water (o/w) emulsion, the content of component (d3) is 15 to 98% by mass, preferably 50 to 95% by mass, and more preferably 70 to 90% by mass, based on the total emulsion cosmetic.

When the emulsion cosmetic of the third invention is a water-in-oil (w/o) emulsion, the preferred content of component (d3) is preferably 20 to 90% by mass, more preferably 30 to 80% by mass, and even more preferably 40 to 70% by mass, based on the total emulsion cosmetic.

[Component (e3)]
The emulsion cosmetic of the third invention may further contain a thickener as component (e3). The thickener can stabilize the emulsion cosmetic of the third invention and/or provide a feeling of adhesion to the emulsion cosmetic of the third invention. A single thickener may be used, or two or more thickeners may be used in combination. The description of the thickener (component (e3)) in the third invention is the same as the description of the thickener (component (c2)) in the second invention, unless otherwise specified.

From the perspective of adhesion, the viscosity of the aqueous solution of the thickener (25°C, pH: 6, 1% by mass) is preferably 500 to 1,200,000 mPa·s, more preferably 500 to 250,000 mPa·s, and even more preferably 1,000 to 200,000 mPa·s.

Component (e3) is
Preferably, the surfactant is at least one selected from the group consisting of xanthan gum, sodium hyaluronate, hydroxyethyl cellulose, carbomer, (acrylates/C10-30 alkyl acrylate) crosspolymer, (PEG-240/decyltetradeceth-20/HDI) copolymer, and (hydroxyethyl acrylate/sodium acryloyldimethyltaurate) copolymer;
More preferably, the surfactant is at least one selected from the group consisting of xanthan gum, carbomer, (acrylates/C10-30 alkyl acrylate) crosspolymer, (PEG-240/decyltetradeceth-20/HDI) copolymer, and (hydroxyethyl acrylate/sodium acryloyldimethyltaurate) copolymer;
More preferably, it is at least one selected from the group consisting of xanthan gum and carbomer.

When the emulsion cosmetic of the third invention contains component (e3), its content is preferably 0.05 to 5.0% by mass relative to the total emulsion cosmetic.

[Component (f3)]
The emulsion cosmetic of the third invention may contain a pH adjuster as component (f3) in order to adjust its pH within a desired range. The pH adjuster may be used alone or in combination of two or more types.

There are no particular limitations on the pH adjuster, as long as it is one that can normally be used in cosmetics, and both basic and acidic substances can be used.

Examples of basic substances include alkali metal hydroxides (e.g., sodium hydroxide, potassium hydroxide), lysine, arginine, sodium citrate, etc. The basic substance is preferably at least one selected from the group consisting of alkali metal hydroxides, arginine, and sodium citrate, more preferably at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, arginine, and sodium citrate, and even more preferably potassium hydroxide.

Examples of acidic substances include citric acid, succinic acid, phosphoric acid, glycolic acid, tartaric acid, lactic acid, aspartic acid, glutamic acid, and carbonic acid. The acidic substance is preferably at least one selected from the group consisting of citric acid, succinic acid, and phosphoric acid, and more preferably citric acid.

Component (f3) is
Preferably, the acid is at least one selected from the group consisting of alkali metal hydroxides, arginine, sodium citrate, citric acid, succinic acid, and phosphoric acid;
More preferably, it is at least one selected from the group consisting of sodium hydroxide, potassium hydroxide, arginine, sodium citrate, and citric acid;
More preferably, it is at least one selected from potassium hydroxide and citric acid.

When component (f3) is used, the content of component (f3) is adjusted so that the pH of the emulsion cosmetic of the third invention falls within the desired range. The pH of the emulsion cosmetic of the third invention is preferably 4 to 8, more preferably 5 to 7.

[Other ingredients]
The emulsion cosmetic of the third invention may contain other components different from components (a3) to (f3) as needed, as long as the effects of the third invention are not impaired. There are no particular limitations on the other components, as long as they are components commonly used in cosmetics. Examples of other components include plant extracts, anti-inflammatory and anti-chattering agents, UV absorbers, UV scattering agents, preservatives, chelating agents, fragrances, etc. One type of other component may be used alone, or two or more types may be used in combination.

The total amount of other ingredients is preferably 50% by mass or less, and more preferably 40% by mass or less, of the entire emulsion cosmetic, from the standpoints of compatibility with wet skin, suppression of thickening, adhesion, and lack of stickiness.

The emulsion cosmetic of the third invention may be an oil-in-water (o/w) emulsion or a water-in-oil (w/o) emulsion. From the standpoint of not feeling sticky, the emulsion cosmetic of the third invention is preferably an oil-in-water emulsion.

The emulsion cosmetic of the third invention can be produced by mixing and stirring components (a3) to (d3), and, if necessary, at least one selected from the group consisting of components (e3), (f3), and other components.

The form of the emulsion cosmetic of the third invention is not particularly limited, and examples of such forms include cream, liquid, emulsion, gel, etc.

The uses of the emulsified cosmetic of the third invention are not particularly limited, and examples of uses include face cream, body cream, sunscreen cream, moisturizing cream, hand cream, body cream, foot cream, massage cream, emulsion, liquid foundation, cleansing agent, etc.

The present invention will be explained in detail below with reference to examples and comparative examples. Note that "%" in the following component amounts means "% by mass" unless otherwise specified.

[Production Example 1: Synthesis of Example Polyether Polyol 1]
A four-necked flask equipped with a stirrer, a nitrogen inlet tube, a thermocouple, and a condenser was charged with 700 g of triethylene glycol (manufactured by Kanto Chemical Co., Ltd.) and 456 g of 1,3-propanediol (manufactured by Kanto Chemical Co., Ltd.) as polyhydric alcohols, and 14.5 g of sulfuric acid (manufactured by Kanto Chemical Co., Ltd.) as a catalyst. After nitrogen substitution, the temperature was raised to 130 ° C., and a dehydration condensation reaction was carried out under nitrogen bubbling conditions. Thereafter, an adsorbent (manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the temperature was 90 ° C., the pressure was -0.097 MPa (gauge pressure) or less, and the mixture was subjected to adsorption treatment for 1 hour under nitrogen bubbling, followed by filtration to obtain Example Polyether Polyol 1.

[Production Example 2: Synthesis of Example Polyether Polyol 6]
A four-necked flask equipped with a stirrer, a nitrogen inlet tube, a thermocouple, and a condenser was charged with 460 g of glycerin (manufactured by Kanto Chemical Co., Ltd.) and 913 g of 1,3-propanediol (manufactured by Kanto Chemical Co., Ltd.) as polyhydric alcohols, and 17.2 g of sulfuric acid (manufactured by Kanto Chemical Co., Ltd.) as a catalyst. After nitrogen substitution, the temperature was raised to 130 ° C., and a dehydration condensation reaction was carried out under nitrogen bubbling conditions. Thereafter, an adsorbent (manufactured by Kyowa Chemical Industry Co., Ltd.) was added, and the mixture was subjected to adsorption treatment for 1 hour under nitrogen bubbling at a temperature of 90 ° C. and a pressure of -0.097 MPa (gauge pressure) or less, followed by filtration to obtain Example Polyether Polyol 6. The molar ratio of group (2) / group (3) of Example Polyether Polyol 6 was calculated using the following method and was found to be 63/37.

(Calculation of the molar ratio of group (2)/group (3))
^The C-NMR measurement of Example Polyether Polyol 6 was carried out using inverse gated decoupling, and the molar ratio of group (2)/group (3) was calculated by comparing the integral value of the signal of the methine carbon of group (2) (near 71 ppm) with the integral value of the signal of the methine carbon of group ( ³ ) (near 79 ppm). The detailed conditions for the C-NMR measurement are as follows:
・^13C -NMR device: JNM-ECA600 (JEOL-NMR)
Solvent: _D2O
Sample concentration: 100 mg/0.6 mL
・Temperature: 25℃
・Number of times accumulated: 256

[Production Example 3: Synthesis of Example Polyether Polyols 2 to 5 and 7 to 9 and Comparative Example Polyether Polyols 1 to 7]
Example polyether polyols 2 to 5 and 7 to 9 and comparative polyether polyols 1 to 7 were synthesized in the same manner as in Production Example 1 or 2, except that the type and degree of polymerization of the polyhydric alcohol used were different. Glycerol was used as the polyhydric alcohol forming GL in formula (1), those listed in Table 1 or Table 2 below were used as the polyhydric alcohol forming CH ₂ CH ₂ O (hereinafter referred to as "raw material for CH ₂ CH ₂ O"), and 1,3-propanediol was used as the polyhydric alcohol forming CH ₂ CH ₂ CH ₂ O.

[Production Example 4: Synthesis of Comparative Polyether Polyol 8]
An autoclave equipped with a thermometer, pressure gauge, safety valve, nitrogen gas inlet tube, stirrer, vacuum exhaust tube, cooling coil, and steam jacket was charged with 152 g of 1,2-propanediol and 6.0 g of potassium hydroxide. After nitrogen substitution, the temperature was raised to 115°C, and a mixture of 697 g of propylene oxide and 1,233 g of ethylene oxide was added over 8 hours at 0.5 MPa or less. After completion of the addition, the mixture was reacted at 115°C for 1 hour, subjected to reduced pressure treatment at 75 to 85°C for 1 hour, and filtered to obtain Comparative Polyether Polyol 8. The weight average molecular weight (hereinafter sometimes abbreviated as "Mw") of Comparative Polyether Polyol 9 measured under the conditions described below was 1,030. Note that Comparative Polyether Polyol 9 differs in structure from the polyether polyols of the present invention in that it contains repeating units derived from propylene oxide (i.e., branched propyleneoxy groups different from linear 1,3-propanediol residues).

[Production Example 5: Synthesis of Comparative Polyether 9]
An autoclave equipped with a thermometer, pressure gauge, safety valve, nitrogen gas inlet tube, stirrer, vacuum exhaust tube, cooling coil, and steam jacket was charged with the comparative polyether polyol 8 (1000 g) obtained in Production Example 3 and potassium hydroxide (110 g). After nitrogen substitution, methyl chloride (120 g) was added as an alkyl etherifying agent at a temperature of 80 ° C. to 130 ° C. and reacted for 5 hours. The reaction mixture was then removed from the autoclave, subjected to adsorption treatment for 1 hour, and filtered to obtain comparative polyether 9. The Mw of comparative polyether 9 measured under the conditions described below was 1050. Comparative polyether 9 is a polyether in which the terminal OH of comparative polyether polyol 9 has been changed to _OCH3 , and has a repeating unit derived from propylene oxide (i.e., a branched propyleneoxy group), and therefore differs in structure from the polyether polyol of the present invention.

[Production Example 6: Synthesis of Comparative Polyether Polyol 10]
An autoclave equipped with a thermometer, pressure gauge, safety valve, nitrogen gas inlet tube, stirrer, vacuum exhaust tube, cooling coil, and steam jacket was charged with 152 g of glycerin and 7.0 g of potassium hydroxide. After nitrogen substitution, the temperature was raised to 120 ° C., and a mixture of 734.5 g of glycidol and 1,439.4 g of propylene oxide was added over 20 hours under conditions of 0.5 MPa or less. After completion of the addition, the reaction was allowed to proceed for 2 hours at 120 ° C. The reaction mixture was then removed from the autoclave, subjected to adsorption treatment for 1 hour, and filtered to obtain Comparative Example Polyether Polyol 10, a random copolymer in which 6 moles of glycidol and 15 moles of propylene oxide were added per mole of glycerin. The Mw of Comparative Example Polyether Polyol 10 measured under the conditions described below was 1,430. Comparative Example Polyether Polyol 10 has a structure different from that of the polyether polyol of the present invention in that it has a repeating unit derived from glycidol and a repeating unit derived from propylene oxide (i.e., a branched propyleneoxy group).

The a, b, a+b, c, b/c (when a is 0), (a+b)/c, CH ₂ CH ₂ O raw materials, and Mw of the obtained Example Polyether Polyols 1 to 9 and Comparative Example Polyether Polyols 1 to 7 are shown in Tables 1 and 2.

The Mw of each of Example Polyether Polyols 1-9, Comparative Polyether Polyols 1-8 and 10, and Comparative Polyether 9 (hereinafter sometimes abbreviated as "Example or Comparative Polymers") was calculated by gel permeation chromatography (GPC) under the following conditions. GPC was performed using a SHODEX (registered trademark) GPC101 GPC-dedicated system, a SHODEX RI-71s differential refractometer, a SHODEX KF-G guard column, and three SHODEX KF804L columns in series. The column temperature was 40°C, and tetrahydrofuran was used as the developing solvent at a flow rate of 1 mL/min. 0.1 mL of a 0.1% tetrahydrofuran solution of the resulting Example or Comparative Polymer and 0.1 mL of a 0.1% tetrahydrofuran solution of PEG were injected. The Mw was calculated from the chromatogram, which is expressed as refractive index intensity and elution time, using the BORWIN GPC calculation program.

(Evaluation of compatibility with oils and fats)
A mixture of olive oil and the polymer of the Example or Comparative Example was prepared by adding 0.1 parts by mass of the polymer of the Example or Comparative Example to 100 parts by mass of olive oil and stirring at room temperature for 30 minutes. The appearance of each mixture was observed, and the compatibility with fats and oils was evaluated according to the following criteria. The results are shown in Table 3.
<Evaluation criteria>
◎: The mixture is uniform and transparent. ○: The mixture is uniform and translucent. ×: The mixture is inhomogeneous, cloudy, or separated.

(Evaluation of compatibility with water)
Five parts by weight of the polymer of the Example or Comparative Example was added to 100 parts by weight of purified water and stirred at room temperature for 30 minutes to prepare a mixture of purified water and the polymer of the Example or Comparative Example. The appearance of each mixture was observed, and the compatibility with water was evaluated according to the following criteria. The results are shown in Table 3.
<Evaluation criteria>
◎: The mixture is uniform and transparent. ○: The mixture is uniform and translucent. ×: The mixture is inhomogeneous, cloudy, or separated.

[Production Example 7: Production of Example Cosmetics 1 to 12 and Comparative Cosmetics 1 to 10]
Example cosmetics 1 to 12 and Comparative cosmetics 1 to 10 were produced by mixing and stirring the polymers of the Examples or Comparative Examples, the common components, and purified water in the amounts shown in Tables 4 or 5. The compositions of the common components are shown in Table 6.

(Evaluation of moisturizing effect)
Ten men and women (aged 25 to 50) served as panelists. In a constant temperature and humidity room set at a temperature of 20°C and a relative humidity of 50%, 0.3 g of each cosmetic product obtained in Production Example 7 was applied to the inside of the right forearm of each panelist, and the moisture content of the stratum corneum before and one hour after application was measured using a skin surface stratum corneum moisture content measuring device (SKICON-200EX, manufactured by IBS Co., Ltd.). A relative value was calculated, with the value before application being set at 1, and the value was scored according to the following criteria. The total score of the 10 panelists was calculated, and the moisturizing effect was evaluated according to the following criteria. The results are shown in Tables 4 and 5.
<Grading criteria>
3 points: relative value is 3 or more 2 points: relative value is 2 or more but less than 3 1 point: relative value is less than 2 <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

(Evaluation of non-stickiness)
Ten men and women (aged 25 to 50) served as panelists. 0.3 g of each cosmetic obtained in Production Example 7 was applied to the inside of the right forearm of each panelist, and the stickiness was evaluated according to the following criteria. The total score of the 10 panelists was calculated, and the lack of stickiness was evaluated according to the following criteria. The results are shown in Tables 4 and 5.
<Grading criteria>
3 points: No stickiness felt 2 points: Slight stickiness felt 1 point: Stickiness felt <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

(Evaluation of the durability of the oil-reducing effect)
Ten men and women (aged 25 to 50) served as panelists. 0.1 g of oleic acid was applied to the inside of the right forearm of each panelist as a pseudo-sebum component, and after allowing it to absorb into the skin, 0.5 g of each cosmetic product obtained in Production Example 7 was applied to the same area. Five hours after application, the shine was evaluated according to the following criteria. The total score of the 10 panelists was calculated, and the durability of the shine-inhibiting effect was evaluated according to the following criteria. The results are shown in Tables 4 and 5.
<Evaluation criteria>
3 points: Shine is suppressed. 2 points: Shine is slightly suppressed. 1 point: Shine is not suppressed. <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

As is clear from Table 3, Example Polyether Polyols 1 to 9 had excellent compatibility with oils and fats. Furthermore, as is clear from Table 4, Example Cosmetics 1 to 12 had excellent moisturizing effects, lack of stickiness, and long-lasting shine-suppressing effects.

In contrast, Comparative Example Polyether Polyols 1-8 and 10, Comparative Example Polyether 9, and Comparative Example Cosmetics 1-10 were inferior in one of the above evaluation items.

Comparative Example Polyether Polyol 1, which has a b/c ratio of greater than 8, has poor compatibility with oils and fats, and Comparative Example Cosmetic Preparation 1 containing it was poor in terms of lack of stickiness and durability of the shine-suppressing effect.

Comparative Example Polyether Polyol 2, in which a was 0 and b/c was less than 1, had poor compatibility with water, and Comparative Example Cosmetic Preparation 2 containing this had poor non-stickiness and long-lasting shine-suppressing effects.

Comparative Example Polyether Polyol 3, in which a exceeds 30 and (a + b)/c exceeds 8, exhibits poor compatibility with oils and fats, and Comparative Example Cosmetic Preparation 3 containing this exhibited poor non-stickiness and durability of its shine-suppressing effect.

Comparative Example Polyether Polyol 4, in which (a + b)/c is less than 0.2, has poor compatibility with water, and Comparative Example Cosmetic Preparation 4, which contained this, separated and could not be evaluated.

Comparative Example Polyether Polyol 5, in which (a + b)/c is less than 0.2, had poor compatibility with water, and Comparative Example Cosmetic Preparation 5 containing it had poor moisturizing effect, lack of stickiness, and durability of the shine-suppressing effect.

Comparative Example Polyether Polyol 6, which had a b greater than 80, had poor compatibility with oils and fats, and Comparative Example Cosmetic Preparation 6 containing it had poor durability of its moisturizing effect and shine-suppressing effect.

Comparative Example Polyether Polyol 7, which had a c greater than 70, had poor compatibility with water, and Comparative Example Cosmetic Preparation 7, which contained it, had poor moisturizing effect.

Comparative Example Polyether Polyol 8, a copolymer of ethylene oxide and propylene oxide with a different structure from the polyether polyol of the present invention, had poor compatibility with oils and fats, and Comparative Example Cosmetic Preparation 8 containing it was inferior in terms of lack of stickiness and durability of its shine-suppressing effect.

Comparative Example Polyether 9, a copolymer of ethylene oxide and propylene oxide with a different structure from the polyether polyol of the present invention, had poor compatibility with oils and fats, and Comparative Example Cosmetic 9 containing it had poor durability of its shine-reducing effect.

Comparative Polyether Polyol 10, a copolymer of glycidol and propylene oxide with a different structure from the polyether polyol of the present invention, exhibited poor compatibility with oils and fats. Furthermore, Comparative Cosmetic Preparation 10, which contained Comparative Polyether Polyol 10, exhibited poor non-stickiness and durability of its shine-suppressing effect.

[Cosmetic formulation example]
Formulation examples of the cosmetics of the first invention (shampoo, treatment, cleansing oil, cleansing water, body soap (foamer type, liquid type), and facial cleansing paste) are shown in Tables 7 to 13 below. The amounts of ingredients shown in Tables 7 to 13 are values based on the entire cosmetic. Furthermore, the names of the ingredients listed in Tables 7 to 13 below have been appropriately based on the cosmetic labeling names provided by the Japan Cosmetic Industry Association. Note that the first invention is not limited to the formulation examples below.

[Production of Skin Cosmetics: Examples 2-1 to 2-20 and Comparative Examples 2-1 to 2-12]
The skin cosmetics of Examples 2-1 to 2-20 and Comparative Examples 2-1 to 2-12 were produced by mixing the components in the amounts shown in Tables 14 to 17. In Tables 16 and 17 below, Comparative Polyether Polyols 1 to 3, 5 to 8, and 10, as well as Comparative Polyether 9, which do not satisfy the requirements of the second invention, are classified as component (a2'). In addition, component (e2) (pH adjuster) was used as appropriate to adjust the pH of each skin cosmetic to approximately 6.

The viscosity (25°C, pH: 6, 1 mass%) of an aqueous solution of the thickener (component (c2)) is as follows.
Viscosity of xanthan gum aqueous solution (25°C, pH: 6, 1% by mass): 1,200 mPa s
Viscosity of (PEG-240/Decyltetradeceth-20/HDI) copolymer aqueous solution (25°C, pH: 6, 1% by mass): 40,000 mPa·s
Viscosity of (acrylic acid/hydroxyethyl/sodium acryloyldimethyltaurate) copolymer aqueous solution (25°C, pH: 6, 1% by mass): 170,000 mPa·s
Viscosity of carbomer aqueous solution (25°C, pH: 6, 1% by mass): 130,000 mPa s
Viscosity of aqueous solution of (acrylates/C10-30 alkyl acrylate) crosspolymer (25°C, pH: 6, 1% by mass): 70,000 mPa·s
Viscosity of hydroxyethyl cellulose aqueous solution (25°C, pH: 6, 1% by mass): 2,000 mPa·s
Viscosity of 1% aqueous solution of sodium hyaluronate at 25°C (25°C, pH: 6, 1% by mass): 1,000,000 mPa·s
In measuring the viscosity of the aqueous thickener solution (25°C, pH: 6, 1% by mass), if the pH of the aqueous thickener solution with a concentration of 1% by mass was higher than 6, the pH was adjusted to 6 using citric acid, and if the pH of the aqueous thickener solution with a concentration of 1% by mass was lower than 6, the pH was adjusted to 6 using potassium hydroxide.

[Evaluation of Skin Cosmetics]
The obtained skin cosmetics were evaluated by the following methods, and the results are shown in Tables 18 to 20.

(Skin compatibility evaluation)
Ten male and female panelists (aged 25 to 50) were used as panelists, and 0.1 g of each of the obtained skin cosmetics was applied to the inside of each panelist's right forearm, and immediately thereafter, the skin compatibility was rated according to the following criteria. The total scores of the 10 panelists were calculated, and the skin compatibility was evaluated according to the following criteria. Skin cosmetics rated "A,""B,""C," or "D" were determined to have excellent skin compatibility.
<Grading criteria>
3 points: Feels like it blends well with the skin 2 points: Feels like it blends slightly with the skin 1 point: Feels like it doesn't blend well with the skin <Evaluation criteria>
A: The total score is 28 points or more. B: The total score is 25 points or more and 27 points or less. C: The total score is 23 points or more and 24 points or less. D: The total score is 20 points or more and 22 points or less. E: The total score is 19 points or less.

(Evaluation of smoothness)
Ten male and female panelists (aged 25 to 50) were used as panelists, and 0.1 g of each of the obtained skin cosmetics was applied to the inside of the right forearm of each panelist, and the smooth feeling was rated according to the following criteria. The total scores of the 10 panelists were calculated, and the smooth feeling was evaluated according to the following criteria. Skin cosmetics rated "A,""B,""C," or "D" were determined to have excellent smooth feeling. In the second invention, "smooth feeling" refers to the feeling of the skin cosmetic spreading on the skin without any stickiness or stickiness.
<Grading criteria>
4 points: Strongly smooth feeling 3 points: Slightly smooth feeling 2 points: Slightly smooth feeling 1 point: No smooth feeling <Evaluation criteria>
A: The total score is 35 points or more. B: The total score is 30 points or more and 34 points or less. C: The total score is 25 points or more and 29 points or less. D: The total score is 20 points or more and 24 points or less. E: The total score is 19 points or less.

(Evaluation of elasticity)
Ten male and female panelists (aged 25 to 50) were used as panelists, and 0.1 g of each of the obtained skin cosmetics was applied to the inside of the right forearm of each panelist and allowed to absorb into the skin. The elasticity felt when the skin was pressed with a finger was then scored according to the following criteria. The total scores of the 10 panelists were calculated, and the elasticity was evaluated according to the following criteria. Skin cosmetics rated "A,""B,""C," or "D" were determined to have excellent elasticity after application.
<Grading criteria>
4 points: Strong elasticity 3 points: Elasticity 2 points: Slight elasticity 1 point: No elasticity <Evaluation criteria>
A: The total score is 35 points or more. B: The total score is 30 points or more and 34 points or less. C: The total score is 25 points or more and 29 points or less. D: The total score is 20 points or more and 24 points or less. E: The total score is 19 points or less.

(Evaluation of gloss-imparting effect)
Ten male and female panelists (aged 25 to 50) were used as panelists, and 0.1 g of each of the obtained skin cosmetics was applied to the inside of the right forearm of each panelist and allowed to absorb into the skin. The skin was then visually inspected and the skin's luster was scored according to the following criteria. The total score of the 10 panelists was calculated, and the luster-imparting effect was evaluated according to the following criteria. Skin cosmetics rated "A,""B,""C," or "D" were determined to be skin cosmetics with excellent luster-imparting effect.
<Grading criteria>
4 points: A strong sense of gloss 3 points: A sense of gloss 2 points: A slight sense of gloss 1 point: No sense of gloss <Evaluation criteria>
A: The total score is 37 points or more. B: The total score is 33 points or more and 36 points or less. C: The total score is 29 points or more and 32 points or less. D: The total score is 24 points or more and 28 points or less. E: The total score is 23 points or less.

(Evaluation of moisturizing effect)
Ten male and female panelists (aged 25 to 50) were used as panelists, and 0.1 g of each obtained skin cosmetic preparation was applied to the inside of the right forearm of each panelist. The moisture content of the stratum corneum before and 2 hours after application was measured using a skin surface stratum corneum moisture content meter (SKICON-200EX, manufactured by IBS Corporation). The moisture content of the stratum corneum after application was calculated relative to the moisture content of the stratum corneum before application (hereinafter referred to as "relative value"), with the moisture content value of the stratum corneum before application being set at 1, and the results were scored according to the following criteria. The total score of the 10 panelists was calculated, and the moisturizing effect was evaluated according to the following criteria. Skin cosmetics rated "A,""B,""C," or "D" were determined to have excellent moisturizing effect.
<Grading criteria>
4 points: relative value is 3.0 or more; 3 points: relative value is 2.5 or more and less than 3.0; 2 points: relative value is 2.0 or more and less than 2.5; 1 point: relative value is less than 2.0 <Evaluation criteria>
A: The total score is 35 points or more. B: The total score is 30 points or more and 34 points or less. C: The total score is 25 points or more and 29 points or less. D: The total score is 20 points or more and 24 points or less. E: The total score is 19 points or less.

As is clear from Tables 18 and 19, the skin cosmetics of Examples 2-1 to 2-20 were excellent in terms of skin compatibility, smoothness, elasticity, gloss-imparting effect, and moisturizing effect.

In contrast, the skin cosmetics of Comparative Examples 2-1 to 2-12 were inferior in any of the above evaluation items.
The skin cosmetic preparation of Comparative Example 2-1, which did not contain component (a2), was inferior in compatibility with the skin, smooth feeling, elasticity, gloss-imparting effect, and moisturizing effect.

The skin cosmetic of Comparative Example 2-2, which did not contain component (b2), was inferior in elasticity, gloss-imparting effect, and moisturizing effect.
The skin cosmetic of Comparative Example 2-3, which did not contain component (c2), was inferior in the smooth feeling, elasticity, and gloss-imparting effect.

The skin cosmetic of Comparative Example 2-4, which contained Comparative Example Polyether Polyol 1 having a b/c ratio of more than 8 instead of component (a2), was inferior in compatibility with the skin, smooth feeling, and gloss-imparting effect.
The skin cosmetic of Comparative Example 2-5, which contained Comparative Example Polyether Polyol 2 in which a was 0 and b/c was less than 1 instead of component (a2), was inferior in the gloss-imparting effect.

The skin cosmetic preparations of Comparative Examples 2-6, which contained Comparative Example Polyether Polyol 3 in which a exceeded 30 and (a+b)/c exceeded 8 instead of component (a2), were inferior in compatibility with the skin, smooth feel, and gloss-imparting effect.
The skin cosmetic preparations of Comparative Examples 2-7, which contained Comparative Example Polyether Polyol 5, in which (a+b)/c was less than 0.2, instead of component (a2), were inferior in elasticity, gloss-imparting effect, and moisturizing effect.

The skin cosmetic of Comparative Example 2-8, which contained Comparative Example Polyether Polyol 6 in which b was greater than 80 instead of component (a2), was inferior in compatibility with the skin, smooth feel, elasticity, gloss-imparting effect, and moisturizing effect.
The skin cosmetic preparations of Comparative Examples 2-9, which contained Comparative Example Polyether Polyol 7 in which c was greater than 70 instead of component (a2), were inferior in smooth feeling, elasticity, gloss-imparting effect, and moisturizing effect.

The skin cosmetic preparation of Comparative Example 2-10, which contained Comparative Example Polyether Polyol 8, which is a copolymer of ethylene oxide and propylene oxide and has a structure different from that of the polyether polyol of the present invention, instead of component (a2), was inferior in the effects of imparting smoothness, elasticity, and shine.
The skin cosmetic preparation of Comparative Example 2-11, which contained Comparative Example Polyether 9, a copolymer of ethylene oxide and propylene oxide and different in structure from the polyether polyol of the present invention, instead of component (a2), was inferior in the effects of imparting smoothness, elasticity, and shine.

The skin cosmetic preparation of Comparative Example 2-12, which contained Comparative Example Polyether Polyol 10, a copolymer of glycerin, glycidol, and propylene oxide, instead of component (a2) and which has a structure different from the polyether polyol of the present invention, was inferior in terms of skin compatibility, smooth feel, and gloss-imparting effect.

[Production and Evaluation of Skin Cosmetics: Examples 2-21 to 2-25]
The skin cosmetics of Examples 2-21 to 2-25 were produced by mixing the components in the amounts shown in Tables 22 and 23. The pH of each skin cosmetic was adjusted to approximately 6 with component (e2) (pH adjuster).

The obtained skin cosmetics of Examples 2-21 to 2-25 were evaluated in the same manner as Examples 2-1 to 2-20. The results are shown in Table 24. As is clear from Table 24, the skin cosmetics of Examples 2-21 to 2-25 were excellent in terms of skin compatibility, smooth feel, elasticity, gloss-imparting effect, and moisturizing effect.

[Production of Emulsion Cosmetics: Examples 3-1 to 3-27 and Comparative Examples 3-1 to 3-12]
The components were mixed in the amounts shown in Tables 25 to 31 to produce the emulsion cosmetics of Examples 3-1 to 3-27 and Comparative Examples 3-1 to 3-12. Examples 3-1 to 3-21, 3-25, and 3-26, as well as Comparative Examples 3-1 to 3-12, are oil-in-water emulsions, while Examples 3-22 to 3-24 and 3-27 are water-in-oil emulsions. In Tables 30 and 31 below, Comparative Example Polyether Polyols 1 to 3, 5 to 8, and 10, as well as Comparative Example Polyether 9, which do not satisfy the requirements of the third invention, are classified as component (a3'). Component (f3) (pH adjuster) was used as appropriate to adjust the pH of each emulsion cosmetic to approximately 6.

The viscosity of an aqueous solution of the thickener (component (e3)) (25°C, pH: about 6, 1% by mass) is as follows:
Viscosity of aqueous carbomer solution (25°C, pH: about 6, 1% by mass): 130,000 mPa·s (acrylates/C10-30 alkyl acrylate) Viscosity of aqueous solution of crosspolymer (25°C, pH: about 6, 1% by mass): 70,000 mPa·s
Viscosity of xanthan gum aqueous solution (25°C, pH: about 6, 1% by mass): 1200 mPa s
Viscosity of (PEG-240/Decyltetradeceth-20/HDI) copolymer aqueous solution (25°C, pH: about 6, 1% by mass): 40,000 mPa·s
Viscosity of (acrylic acid/hydroxyethyl/sodium acryloyldimethyltaurate) copolymer aqueous solution (25°C, pH: about 6, 1% by mass): 170,000 mPa·s
In measuring the viscosity of the aqueous thickener solution (25°C, pH: 6, 1% by mass), if the pH of the aqueous thickener solution with a concentration of 1% by mass was higher than 6, the pH was adjusted to 6 using citric acid, and if the pH of the aqueous thickener solution with a concentration of 1% by mass was lower than 6, the pH was adjusted to 6 using potassium hydroxide.

[Evaluation of Emulsion Cosmetics]
The resulting emulsion cosmetics were evaluated by the following methods. The evaluation results and total scores for each evaluation are shown in Tables 32 to 38.

(Evaluation of compatibility with wet skin)
Ten men and women (aged 25 to 50) served as panelists. Each panelist applied 0.3 g of water to the inside of their right forearm, followed immediately by application of 0.3 g of each of the obtained emulsion cosmetics, and the compatibility with wet skin was rated according to the following criteria. The total scores of the 10 panelists were calculated, and the compatibility with wet skin was evaluated according to the following criteria. Emulsion cosmetics rated as "◎" or "◯" were determined to have excellent compatibility with wet skin.
<Grading criteria>
3 points: Very good compatibility with wet skin 2 points: Good compatibility with wet skin 1 point: Poor compatibility with wet skin <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

(Evaluation of suppression of thickening)
Ten men and women (aged 25 to 50) served as panelists. 0.3 g of each of the obtained emulsion cosmetics was applied to the inside of the right forearm of each panelist, and the increase in viscosity from the start of application until drying was scored according to the following criteria. The total score of the 10 panelists was calculated, and the thickening suppression was evaluated according to the following criteria. Emulsion cosmetics rated as "◎" or "◯" were determined to be emulsion cosmetics with excellent thickening suppression.
<Grading criteria>
3 points: No increase in viscosity 2 points: Slight increase in viscosity 1 point: Increase in viscosity <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

(Evaluation of adhesion)
Ten men and women (aged 25 to 50) served as panelists. Each panelist applied 0.3 g of each of the obtained emulsion cosmetics to the inside of their right forearm, and then rated the adhesion according to the following criteria. The total scores of the 10 panelists were calculated, and the adhesion was evaluated according to the following criteria. Emulsion cosmetics rated as "◎" or "◯" were determined to have excellent adhesion.
<Grading criteria>
3 points: Feels tight; 2 points: Feels slightly tight; 1 point: Does not feel tight <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

(Evaluation of non-stickiness)
Ten men and women (aged 25 to 50) served as panelists. 0.3 g of each cosmetic obtained was applied to the inside of the right forearm of each panelist, and the absence of stickiness after drying was scored according to the following criteria. The total scores of the 10 panelists were calculated, and the absence of stickiness was evaluated according to the following criteria. Emulsion cosmetics rated as "◎" or "◯" were determined to be emulsion cosmetics with excellent lack of stickiness.
<Grading criteria>
3 points: No stickiness felt 2 points: Slight stickiness felt 1 point: Stickiness felt <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

(Evaluation of the durability of the oil-reducing effect)
Ten men and women (aged 25 to 50) served as panelists. 0.1 g of oleic acid was applied as a pseudo-sebum component to the inside of the right forearm of each panelist, and after allowing it to absorb into the skin, 0.5 g of each of the obtained emulsion cosmetics was applied to the same area. Five hours after application, the shine was rated according to the following criteria. The total score of the 10 panelists was calculated, and the durability of the shine-suppressing effect was evaluated according to the following criteria. Emulsion cosmetics rated as "◎" or "◯" were determined to be emulsion cosmetics with excellent durability of the shine-suppressing effect.
<Evaluation criteria>
3 points: Shine is suppressed. 2 points: Shine is slightly suppressed. 1 point: Shine is not suppressed. <Evaluation criteria>
◎: Total score is 25 points or more ○: Total score is 20 points or more and 24 points or less ×: Total score is 19 points or less

As is clear from Tables 32 to 36, the emulsion cosmetics of Examples 3-1 to 3-27 were excellent in terms of compatibility with wet skin, suppression of thickening, adhesion, lack of stickiness, and durability of the shine-suppressing effect.

In contrast, the emulsion cosmetics of Comparative Examples 3-1 to 3-12 were inferior in any of the above evaluation items.
The emulsion cosmetic of Comparative Example 3-1, which contained Comparative Example Polyether Polyol 1 in which b/c exceeded 8, was inferior in compatibility with wet skin, lack of stickiness, and durability of the shine-suppressing effect.
The emulsion cosmetic of Comparative Example 3-2, which contained Comparative Example Polyether Polyol 2 in which a was 0 and b/c was less than 1, was inferior in adhesion, non-stickiness, and durability of the shine-suppressing effect.

The emulsion cosmetic of Comparative Example 3-3, which contained Comparative Example Polyether Polyol 3 in which a exceeded 30 and (a+b)/c exceeded 8, was inferior in compatibility with wet skin, lack of stickiness, and durability of the shine-suppressing effect.
The emulsion cosmetic of Comparative Example 3-4, which contained Comparative Example Polyether Polyol 5 in which (a+b)/c was less than 0.2, was inferior in adhesion and durability of the shine-suppressing effect.

The emulsion cosmetics of Comparative Examples 3 to 5, which contained Comparative Example Polyether Polyol 6 in which b was greater than 80, were inferior in compatibility with wet skin and in the durability of the thickening-inhibiting and shine-inhibiting effects.
The emulsion cosmetics of Comparative Examples 3 to 6, which contained Comparative Example Polyether Polyol 7 in which c was greater than 70, were inferior in adhesion and durability of the shine-suppressing effect.

The emulsion cosmetics of Comparative Examples 3 to 7, which contained Comparative Polyether Polyol 8, a copolymer of ethylene oxide and propylene oxide and which has a structure different from that of the polyether polyol of the present invention, were inferior in the durability of the thickening-inhibiting and shine-inhibiting effects.
The emulsion cosmetics of Comparative Examples 3 to 8, which contained Comparative Example Polyether 9, a copolymer of ethylene oxide and propylene oxide and which has a structure different from that of the polyether polyol of the present invention, were inferior in adhesion and durability of the shine-suppressing effect.

The emulsion cosmetics of Comparative Examples 3 to 9, which contained Comparative Polyether Polyol 10, a copolymer of glycerin, glycidol, and propylene oxide, and which has a structure different from that of the polyether polyol of the present invention, were inferior in adhesion and durability of the shine-suppressing effect.
The emulsion cosmetic of Comparative Example 3-10, which did not contain component (a3), was inferior in compatibility with wet skin, adhesion, lack of stickiness, and durability of the thickening-inhibiting and shine-inhibiting effects.

The emulsion cosmetic of Comparative Example 3-11, in which the content of component (b3) exceeded 50% by mass, was inferior in compatibility with wet skin, lack of stickiness, and suppression of thickening.
The emulsion cosmetic of Comparative Example 3-12, in which the content of component (c3) exceeded 10% by mass, was inferior in terms of lack of stickiness.

[Formulation example of emulsion cosmetics]
Formulation examples of the emulsion cosmetics of the third invention (moisturizing cream (oil-in-water type or water-in-oil type), sunscreen cream, and liquid foundation) are shown in Tables 39 to 42 below. The amounts of ingredients shown in Tables 39 to 42 are values based on the entire emulsion cosmetic. Furthermore, the cosmetic labeling names provided by the Japan Cosmetic Industry Association have been used as appropriate for the names of the ingredients listed in Tables 39 to 42 below. Note that the third invention is not limited to the formulation examples below.

The cosmetic base of the first invention (i.e., the polyether polyol of the present invention) has excellent compatibility with water and with oils and fats.
The skin cosmetic of the second invention is excellent in compatibility with the skin, smooth feeling during application, elastic feeling after application, gloss-imparting effect, and moisturizing effect.
The emulsified cosmetic of the third invention is excellent in compatibility with wet skin, suppression of thickening, adhesion, non-stickiness, and suppression of shine.

This application is based on patent applications Nos. 2024-084318, 2025-053825, 2025-053927, and 2025-077606 filed in Japan, the contents of which are incorporated in their entirety into this specification.

Claims (5)

Formula (1):
HO-{(GL) _a / (CH ₂ CH ₂ O) _b / (CH ₂ CH ₂ CH ₂ O) _c }-H (1)
[In the formula,
GL is a glycerin residue,
a, b, and c are the average degrees of polymerization of GL, CH ₂ CH ₂ O, and CH ₂ CH ₂ CH ₂ O, respectively;
a is a number from 0 to 30,
b is a number from 0 to 80,
c is a number from 1 to 70;
a+b are numbers from 1 to 90,
(a+b)/c is a number from 0.2 to 8, and when a is 0, b/c is a number from 1 to 8.
A cosmetic base comprising a polyether polyol represented by the formula: A cosmetic comprising the cosmetic base described in claim 1 in an amount of 0.1 to 30% by mass based on the total cosmetic. The following components (a2) to (d2):
(a2) the cosmetic base according to claim 1;
(b2) a polyhydric alcohol having 3 to 9 carbon atoms;
A skin cosmetic comprising (c2) a thickener and (d2) water,
A skin cosmetic, in which the content of component (a2) is 0.1 to 10 mass %, the content of component (b2) is 1 to 30 mass %, and the content of component (c2) is 0.01 to 10 mass %, based on the total weight of the skin cosmetic. The following components (a3) to (d3):
(a3) the cosmetic base according to claim 1;
(b3) oil agent,
An emulsion cosmetic comprising (c3) a nonionic surfactant and (d3) water,
An emulsion cosmetic in which the content of component (a3) is 0.1 to 30 mass%, the content of component (b3) is 1 to 50 mass%, the content of component (c3) is 0.1 to 10 mass%, and the content of component (d3) is 15 to 98 mass%, based on the total mass of the emulsion cosmetic. The following component (e3):
The emulsion cosmetic according to claim 4, further comprising (e3) a thickener.