CN107375015A - Oiliness makeup removing cosmetic preparation - Google Patents

Abstract

An object of the present invention is to provide an oil-based cleansing cosmetic that has high cleansing power and can be rinsed off. Specifically, there is provided an oily cleansing cosmetic, characterized in that, in the oily cleansing cosmetic containing (A), (B) and (C), (A): a fatty acid with 8 to 10 carbon atoms and Polyglycerol difatty acid ester composed of polyglycerol with an average degree of polymerization of 4-10, (B): Esterified polyglycerol di-fatty acid ester composed of fatty acid with 18-22 carbon atoms and polyglycerol with an average degree of polymerization of 8-15 Fatty acid ester, (C): oil agent, (A): (B) is 12:5～1:1.

Description

Oily makeup remover

technical field

The present invention relates to an oily cleansing cosmetic.

Background technique

Oil-based cleansing cosmetics that remove make-up and dirt by utilizing the dissolving action of oil-based ingredients are being accepted by a large number of customers because there is less burden on the skin during makeup removal. The main components of oil-based makeup remover cosmetics are oil agents and surfactants. Furthermore, a thickener may also be compounded as needed. The mechanism of action of oil-based makeup remover cosmetics is: the oily ingredients dissolve makeup dirt, and then through the action of surfactants, it can be rinsed with water. However, when the balance between the selection and the compounding amount of the two components is poor, even if makeup dirt can be dissolved, there may be a strong residual greasy feeling after rinsing with water. In addition, if the greasy feeling remains, in order to further remove it, it is necessary to wash it again with a cleanser, and the skin may be rough and irritated due to excessive degreasing of the skin.

In addition, the use of oil-based makeup removers in the shower is increasing. Therefore, it is desired to achieve performance that does not lower the cleansing power even when using wet hands.

The applicant of the present application has completed the invention of an oil-based cleansing cosmetic that does not reduce the cleansing power even when using wet hands, and obtained a patent (Patent Document 1, Non-Patent Document 1).

However, in response to recent make-up cosmetics, oil-based cleansing cosmetics with stronger cleaning power and less burden on the skin are required. Furthermore, it has been pointed out that oily cleansing cosmetics are generally difficult to rinse off in the case of hard water, and the residual greasy feeling becomes stronger, and oily cleansing cosmetics that are still highly effective even in areas with hard water are required.

prior art literature

patent documents

Patent Document 1: Japanese Patent No. 4145238

non-patent literature

Non-Patent Document 1: "Development of Cleansing Oil Using Polyglyceryl Fatty Acid Ester" Journal of the Japan Cosmetic Technologists Association (Cosmetic Technologists) Vol. 39 No. 3, 2005, Pages 186-194

Contents of the invention

The object of the present invention is to provide an oil-based makeup remover cosmetic that has strong makeup removal power against makeup stains even in areas with hard water, does not leave a greasy feeling, and is easy to rinse off.

The inventors of the present invention found that the cleansing power does not decrease even if the hands are wetted with water by combining two types of polyglyceryl difatty acid esters and an oil agent, and that it can be rinsed off with water. It was also found that when polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glyceryl monoisostearate and diglyceryl monoisostearate were blended as surfactants, even if it was not suitable in the past, It is an oily cleansing cosmetic that does not reduce the cleansing power in hard water areas (when using hard water) where oily cleansing cosmetics are used.

That is, the main constitution of the present invention is as follows.

(1) An oily cleansing cosmetic, characterized in that, in the oily cleansing cosmetic containing (A), (B), (C),

(A): Polyglycerol difatty acid ester composed of fatty acid with 8 to 10 carbon atoms and polyglycerol with an average degree of polymerization of 4 to 10,

(B): Esterified polyglycerol di-fatty acid esters composed of fatty acids with 18-22 carbon atoms and polyglycerol with an average degree of polymerization of 8-15,

(C): oil agent,

(A): (B) is 12:5～1:1.

(2) The oil-based cleansing cosmetic according to (1), wherein the polyglycerol diglycerin fatty acid ester composed of a fatty acid having 8 to 10 carbon atoms and polyglycerin having an average degree of polymerization of 4 to 10 is hexaglycerin Dicaprate and/or Hexaglyceryl Dicaprylate.

(3) The oil-based cleansing cosmetic according to (1) or (2), wherein the esterified polyglycerol composed of a fatty acid having 18 to 22 carbon atoms and a polyglycerol having an average degree of polymerization of 8 to 15 The di-fatty acid ester is decaglyceryl diisostearate and/or decaglyceryl dioleate.

(4) The oil-based cleansing cosmetic according to any one of (1) to (3), wherein the oil agent is selected from the group consisting of cetyl 2-ethylhexanoate, methylphenyl polysiloxane, More than one of Pondflower seed oil and 2-hexyldecyl isostearate.

(5) The oil-based cleansing cosmetic according to any one of (1) to (4), further comprising (D): polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glycerin Monoisostearate (30EO), and (E): diglyceryl monoisostearate.

(6) The oil-based cleansing cosmetic according to (5), wherein the polyoxyethylene sorbitan fatty acid ester is polyoxyethylene sorbitan monostearate (20EO) and/or polyoxyethylene sorbitan monostearate (20EO) and/or polyoxyethylene sorbitan Ethylene sorbitan monooleate (20EO).

(7) The oil-based cleansing cosmetic according to (5) or (6), wherein when the particle size distribution of the emulsified particles produced by diluting with hard water having a hardness of 400 mg/L or more is measured, it appears at 0.1 to 1 μm. extreme peak.

The oil-based cleansing cosmetic composition of the present invention does not lower the cleansing power even when used with wet hands, and the oily cleansing cosmetic can be rinsed off without remaining on the skin. In addition, the oil-based cleansing cosmetic of the present invention does not degrade the cleansing function even when water with high hardness is used. Therefore, even in hard water environments such as limestone areas, it is possible to cleanse the face with freshness and no oily residue.

Description of drawings

Fig. 1 shows a particle size distribution diagram of emulsified particle diameters when the oil-based cleansing cosmetic of Example 10 is diluted 60 times with water.

Fig. 2 shows a particle size distribution diagram of emulsified particle diameters when the oil-based cleansing cosmetic material of Example 10 is diluted 60 times with hard water having a hardness of 489 mg/L.

Fig. 3 is a particle size distribution diagram of emulsified particle diameters when the oil-based cleansing cosmetic material of formulation example 1 is diluted 60 times with ion-exchanged water.

Fig. 4 is a particle size distribution diagram showing emulsified particle diameters when the oil-based cleansing cosmetic material of formulation example 1 is diluted 60 times with hard water.

5 is an image of the contact angle between skin and water droplets after washing with the oil-based cleansing cosmetic material of Prescription Example 1. FIG.

Fig. 6 is an image of the contact angle between skin and water droplets after washing with the oil-based cleansing cosmetic material of Comparative Example 21.

Fig. 7 shows a particle size distribution diagram of the emulsified particle size when the oil-based cleansing cosmetic material of Comparative Example 21 is diluted 60 times with ion-exchanged water.

Fig. 8 is an image of the contact angle between skin and water droplets after washing with a commercially available oil-based cleansing cosmetic.

Fig. 9 is a particle size distribution diagram showing emulsified particle diameters of a 60-fold dilution of a commercially available oil-based cleansing cosmetic material in a reference test example diluted with hard water.

detailed description

The present invention relates to an oil-based cleansing cosmetic, characterized in that, in the oil-based cleansing cosmetic containing (A), (B) and (C), (A): a fatty acid having 8 to 10 carbon atoms and an average Polyglycerol di-fatty acid ester composed of polyglycerol with a degree of polymerization of 4-10, (B): Esterified polyglycerol di-fatty acid ester composed of fatty acid with 18-22 carbon atoms and polyglycerol with an average degree of polymerization of 8-15 Ester, (C): oil agent, (A): (B) is 12:5～1:1.

Hereinafter, the components of the present invention will be described.

<(A): Polyglyceryl difatty acid ester composed of fatty acid with 8 to 10 carbon atoms and polyglycerol with an average degree of polymerization of 4 to 10>

Component (A) used in the present invention is a surfactant, which is a polyglyceryl difatty acid ester obtained by esterifying a fatty acid having 8 to 10 carbon atoms and a polyglycerol having an average degree of polymerization of 4 to 10. Specifically, hexapolyglycerol dicaprate and hexapolyglycerol dicaprate may be used alone or in combination. The polyglyceryl diglyceride fatty acid ester of the component (A) of the present invention is preferably blended in an amount of 9 to 12 mass % with respect to the oil-based cleansing cosmetic.

<(B): Polyglyceryl difatty acid ester composed of fatty acid with 18 to 22 carbon atoms and polyglycerin with an average degree of polymerization of 8 to 15>

Component (B) used in the present invention is a surfactant, which is a polyglycerol difatty acid ester obtained by esterifying a fatty acid having 18 to 22 carbon atoms and a polyglycerol having an average degree of polymerization of 8 to 15. Specifically, decaglyceryl diisostearate and decaglyceryl dioleate may be used alone or in combination. The polyglyceryl diglyceride fatty acid ester of the component (B) of the present invention is preferably blended in an amount of 5 to 8 mass % with respect to the oil-based cleansing cosmetic.

In the present invention, the compounding component (A) is more than the component (B). In the oil-based cleansing cosmetic of the present invention, (A):(B) is preferably 12:5 to 1:1. When the composition is within this range, the cleansing power does not decrease even if the hands are wet with water, and it can be rinsed off with water, and there is no greasy residue on the skin after rinsing.

<(C): Oil agent>

As (C) oil agent mix|blended in this invention, the following can be illustrated.

Examples include natural animal and vegetable oils and semi-synthetic oils, hydrocarbon oils, ester oils, glyceride oils, silicone oils, fat-soluble vitamins, higher fatty acids, animal, vegetable or synthetic essential oil components, and the like. Examples of natural animal and vegetable oils and semi-synthetic oils include avocado oil, linseed oil, almond oil, olive oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, safflower oil, soybean oil, and evening primrose Oil, corn oil, canola oil, horse fat, palm oil, palm kernel oil, castor oil, sunflower oil, jojoba oil, macadamia oil, coconut oil, hydrogenated coconut oil, peanut oil, lanolin, etc. Examples of hydrocarbon oils include squalane, squalene, liquid paraffin, petrolatum, and the like. Examples of ester oils include diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, isostearyl isostearate, triisostearyl Trimethylolpropyl 2-ethylhexanoate, cetyl 2-ethylhexanoate, neopentyl glycol di-2-ethylhexanoate, trimethylolpropyl 2-ethylhexanoate, tetrakis-2 - Pentaerythritol ethylhexanoate, cetyl caprylate, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, 2-ethyl succinate Hexyl, Isocetyl Stearate, Butyl Stearate, Diisopropyl Sebacate, Cetyl Lactate, Myristyl Lactate, Isopropyl Myristate, Octyl Palmitate, 2-Palmitate Ethylhexyl, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesterol 12-hydroxystearate, phytosteryl oleate, diisostearate malate, p-methoxy Cinnamate, Pentaerythritol Rosin Etc. Glyceryl triisostearate, glyceryl triisopalmitate, glyceryl tris-2-ethylhexanoate, glyceryl trimyristate, glyceryl di-p-methoxycinnamic monoisocaprylate Wait. Examples of silicone oils include dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclopentasiloxane, decamethylcyclohexasiloxane, diphenyl Advanced alkoxy modified polysiloxane, alkyl modified polysiloxane, advanced fatty acid ester modified polysiloxane, etc.

Among those exemplified, since cetyl 2-ethylhexanoate, methylphenyl polysiloxane, 2-hexyldecyl isostearate, octyl (octyl/capric acid) etc. , the effect of makeup removal is improved, so it is preferred.

Moreover, since a skin softening effect is exhibited when a small amount is blended, it is preferable.

From the viewpoint of cleansing power and flushing properties, the compounding amount of the oil agent is preferably 10 to 90% by mass based on the total amount of the oil-based cleansing cosmetic.

When (A) component, (B) component, and (C) component are further compounded as (D) component selected from polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerol monoisostearate ( When more than one hydrophilic surfactant in 30EO) and diglyceryl monoisostearate as (E) component, even if it is hard water, it can not reduce the cleansing function (that is, use wetted water It is preferable to use the function of maintaining the cleansing power and the function of being able to wash off with water even when using it by hand.

<(D): Polyoxyethylene sorbitan fatty acid ester polyoxyethylene glyceryl monoisostearate (30EO)>

Component (D) is a hydrophilic surfactant which is polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glycerol monoisostearate (30EO). The polyoxyethylene sorbitan fatty acid ester is a substance obtained by adding and polymerizing ethylene oxide to an ester of sorbitol and a fatty acid having 12 to 18 carbon atoms. Specifically, polyoxyethylene sorbitan monostearate (20EO) and polyoxyethylene sorbitan monooleate (20EO) are mentioned.

The component (D) is preferably blended in an amount of 0.1 to 3% by mass, more preferably 1.2 to 3% by mass, based on the oily cleansing cosmetic.

<(E): Dipolyglyceryl monoisostearate>

Dipolyglyceryl monoisostearate is an ester of isostearic acid and diglycerin, and is usually used as a lipophilic solvent. In the present invention, the amount of water that can be solubilized in an oil-based cleansing cosmetic can be increased by blending diglyceryl monoisostearate. Diglycerol monoisostearate is preferably blended in an amount of 0.1 to 3% by mass, more preferably 0.2 to 1% by mass, based on the oily cleansing cosmetic.

In the present invention, when (D) as a hydrophilic surfactant: polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glycerol monoisostearate (30EO) and as a lipophilic solvent (E): When diglyceryl monoisostearate is blended at a ratio of (D): (E) of 1.7:1 to 3:0.4, even hard water will not reduce the cleansing function (even if it is washed with water) The function that maintains the cleansing power even when using it with wet hands, and the function that can be washed off with water) can clean oily makeup dirt smoothly.

<arbitrary ingredient>

In the oil-based cleansing cosmetic of the present invention, various raw materials commonly used in cosmetics can be blended as optional components within the range not impairing the effects of the present invention. For example, polyols, thickeners, antioxidants, fragrances, etc. can be added.

Since polyhydric alcohol may function as a solvent, the cleansing power may be enhanced when blended. In particular, when 1,2-pentanediol or dipropylene glycol is blended, it is preferable because the cleansing power improves.

As a thickener, stearoyl inulin and (behenic acid/eicosanedioic acid) glyceride can be illustrated preferably. The first purpose of including a tackifier is to tackify to a desired viscosity. The second purpose is to improve spreadability, thereby making it glide on the skin and making makeup removal easier. The unique viscosity also improves the stickiness of surfactants and oils. The third object is to form a thin film when applied to the skin, prevent excessive friction against the skin, exhibit an irritation-suppressing effect, and improve safety. The thickener is preferably blended in an amount of 0.01 to 3% by mass in the composition. When it is less than 0.01% by mass, it may be difficult to obtain the effect of improving the spread and the effect of alleviating irritation. When more than 3% by mass is blended, precipitation may occur.

Examples of the antioxidant include tocopherol.

Considering usability and feeling of use, the oil-based cleansing cosmetic of the present invention is designed into various formulations. As a preferable form, a liquid or gel form can be used.

Example

The features and effects of the present invention will be further described in detail by listing examples, comparative examples, and test examples below.

1. Contains (A) component: hexaglyceryl dicaprate, (B) component: decaglyceryl diisostearate or decaglyceryl dioleate, (C) component: 2-ethylhexyl Preparation, cleaning and flushing effect test of Examples 1-4 and Comparative Examples 1-17 of cetyl acid

The oily cleansing cosmetics of Examples 1-4 were prepared with the composition shown in Table 1, and the oily cleansing cosmetics of Comparative Examples 1-17 were prepared with the composition shown in Table 2. In addition, Examples 1-4 are a composition which mix|blended (A) component and (B) component in the compounding ratio of 12:5-1:1. Comparative Examples 1 and 2 are compositions in which the compounding ratio of (A) component and (B) component was compounded at 5:11.5. Comparative Examples 3 to 17 are compositions in which component (A) was not added.

Table 1

Table 2

<Preparation method>

Each component was stirred and mixed while heating according to a conventional method to prepare a liquid oil-based cleansing cosmetic.

<Evaluation method>

The cleansing power when used with water-wet hands and the non-residual greasy feeling after rinsing with water were evaluated using the following test methods.

[Evaluation of cleansing function]

In order to evaluate "cleansing power when using with wet hands" and "no residual greasy feeling after rinsing with water", the following simple test method is popularized and often used. In the present invention, the aforementioned two cleansing functions were evaluated based on this test method. In addition, a sensory evaluation test was carried out.

(1) Simple test method

<Measurement of Ability to Solubilize Water (Test to Evaluate "Cleansing Power When Using With Hands Wet With Water")>

The appearance when water was added to the oil-based cleansing cosmetic was observed, and the amount of water that could be solubilized in a transparent state was measured.

While stirring each oil-based cleansing cosmetic, water was added dropwise, and the amount of water when it became cloudy was measured.

The fact that transparency can be maintained even when water is added means that it does not become an O/W emulsion composition (either a reverse micelle phase, a lamellar liquid crystal phase, or a bicontinuous microemulsion) even if water is mixed therein.

Since the oily components of oily makeup removers dissolve oily make-up dirt, the continuity of the oil phase is essential. In this evaluation method, as the amount of water that can be solubilized in a transparent state, the amount that can be mixed with respect to 100% by mass of the oil-based cleansing cosmetic is measured.

In addition, if the transparency can be maintained even with the addition of 20% by mass of water, the oil phase is continuous, and it can be judged that the cleansing power initially set can be substantially maintained. When the amount of water added was 15% by mass or less, it was judged that the cleansing power was insufficient.

<Measurement of emulsified particle size when water is added to form an O/W type emulsified composition (test to evaluate "no residual greasy feeling after rinsing with water")>

The mechanism of action of oil-based makeup remover cosmetics is that the oil-based ingredients dissolve makeup dirt, and then rinse with water through the action of surfactants. However, when the balance is poor, there are cases where it is not from clean makeup dirt. The residual greasy feeling comes from the residual greasy feeling left on the skin by the oily makeup remover itself. This test is a test for predicting the residual greasy feeling caused by the skin residue of oil-based cleansing cosmetics. Moreover, if the test result is good, it can be predicted that it can be used without remaining greasy feeling even when using an oil-based cleansing cosmetic as a normal cleansing agent.

An O/W emulsified composition was prepared by adding water in an amount 60 times that of the oil-based cleansing cosmetic, and the emulsified particle diameter in the composition was measured by laser diffraction using a laser particle size analyzer 2000 (manufactured by Malvern Instruments Ltd.). Furthermore, measurement of the volume-based mean diameter and observation of the peak shape of the particle size distribution were performed.

When the emulsified particle size is large, an oily feeling (remaining greasy feeling) remains on the skin. However, as long as the emulsified particle size formed when water is added has a maximum peak at 1 μm or less, there will be no greasy feeling left after washing and a refreshing cleansing feeling.

(2) Sensory evaluation test

<Make-up removal power when using with wet hands>

A skilled technician actually applied various oily cleansing cosmetics to the skin on which the oily cosmetics (lipstick) were applied with hands wetted with water, and the cleansing power was evaluated according to the following criteria.

○: very good

△: good

×: Bad

<Residual greasy feeling after washing without water>

This test is a test performed for the purpose of evaluating the residual greasy feeling of the oil-based cleansing cosmetic itself after washing with water. Therefore, unlike the previous test, the lipstick was not pre-applied on the skin.

One skilled person applied each oil-based cleansing cosmetic material to the skin with water-wet hands, and evaluated the residual greasy feeling (residual feeling) of the cleansing material on the skin after washing with water according to the following criteria.

○: No residual greasy feeling

△: There is a residual greasy feeling

(3) Results

The compositions of Examples 1-4 all have good makeup removing effects. Plus, there is no greasy residue left after washing. The upper limit of the mixing amount of water capable of maintaining the cosmetic in a transparent state is 20% by mass in Examples 1, 3, and 4, and 30% by mass in Example 2, and an extremely high capacity can be added. In addition, the size of emulsified particles is extremely small when diluted 60 times with water, ranging from 0.2 to 0.8 μm. The results of these two sets of tests confirmed good makeup removal power and no residual greasy feel when applied with wet hands.

On the other hand, in all the compositions of Comparative Examples 1 to 17, the cleansing power evaluation was poor when used with hands wet with water. In addition, only Comparative Example 2 was "Evaluation ○" that there was no residual greasy feeling after washing with water, and the compositions of the other Comparative Examples were all "Evaluation X" that there was residual greasy feeling. It was confirmed that this is because even if a small amount of water is added, the O/W emulsified composition will become cloudy, and when diluted with water 60 times, most of the composition will be separated without emulsification, even if it is emulsified. The emulsified particles are as large as 7.566μm.

Comparative Example 1 contained the essential components (A), (B) and (C) of the present invention, but the result was "evaluation ×" in which the cleansing power was poor when used with wet hands, and "evaluation" in which there was a greasy feeling after rinsing with water. ×". This is considered to be because the compounding ratio of (A) component and (B) component is 5:11.5, and the ratio of (B) component is larger than (A) component. Comparative example 2 is "evaluation ○" where there is no greasy feeling after rinsing with water, but "evaluation x" is that the cleansing power is poor when using with wet hands. This is also considered to be the difference between (A) component and (B) component The compounding ratio is 5:11.5, and the ratio of (B) component is more than (A) component.

In addition, Comparative Examples 10, 11, 15, 16, and 17 separated immediately after preparation, and did not become homogeneous oil-based cleansing cosmetics.

From the above test results, it is believed that (A) : Polyglycerol diglyceride fatty acid ester composed of fatty acid with 8-10 carbon atoms and polyglycerin with an average degree of polymerization of 4-10, (B): fatty acid with 18-22 carbon atoms and polyglycerol with an average degree of polymerization of 8-15 Esterified polyglycerol di fatty acid ester composed of polyglycerol, (C): oil agent, and the ratio of (A):(B) is 12:5-1:1.

2. Re-examination test of the ratio of (A) component: hexaglyceryl dicaprate, (B) component: decaglyceryl diisostearate

In the above 1, the ratio of (A) component and (B) component was made clear. To reconfirm this, oil-based cleansing cosmetics having the compositions of Examples 5 to 8 and Comparative Examples 18 to 21 shown in Table 3 below were prepared, and an evaluation test was performed under the same conditions as 1.

(1) Test composition

table 3

In addition, the mixing ratios of (A) component and (B) component in Examples 5 to 8 were 12:5 in Example 5, 11:6 in Example 6, 10:7 in Example 7, and 10:7 in Example 8. It is 9:8. Similarly, Comparative Example 18 was 13:4, Comparative Example 19 was 8:9, Comparative Example 20 was 6:11, and Comparative Example 21 was 4:13.

(2) Results

The evaluation results are shown in the lower part of Table 3.

The compositions of Examples 5-8 all showed good cleansing power and no residual greasy feeling after rinsing with water. The upper limit of the mixing amount of water that can maintain the cosmetic in a transparent state is 30% by mass in Example 5 and Example 8, 40% by mass in Example 6, and 35% by mass in Example 7, and it is possible to add extremely high capacity . In addition, the size of the emulsified particles in Examples 5 to 8 when diluted 60 times with water was as small as 0.3 to 0.7 μm. The results of these two sets of tests confirmed the sensory evaluation results of good cleansing power when used with wet hands and no residual greasy feeling after rinsing with water.

On the other hand, the compositions of Comparative Examples 19 to 21 were unfavorable in both the evaluation of cleansing power and the evaluation of residual greasy feeling after rinsing with water. In addition, the upper limit of the mixing amount of water capable of maintaining the cosmetic in a transparent state was 15% by mass in Comparative Example 18, 5% by mass in Comparative Examples 19 and 20, and 0% by mass in Comparative Example 21. The solubilization of water Small quantity. In addition, the size of the emulsified particle diameter when diluted 60 times with water was only 0.3 μm in Comparative Example 18, and exceeded 1 μm in all other cases, and it was as large as 22 μm or more in Comparative Example 21. The results of these two groups of tests directly confirmed the results of "evaluation ×" in which the sensory evaluation tests (makeup removal power, residual greasy feeling) of Comparative Examples 19-21 were poor. In Comparative Example 18, the upper limit of the mixed amount of water capable of maintaining the cosmetic in a transparent state was 15% by mass, and the cleansing power was good (evaluation △). From this result, it can be judged that the cleansing power of Comparative Example 18 may decrease when the amount of water is mixed in actual use.

Comprehensive 1.'s test result and 2.'s test result can know that the oily cleansing cosmetic material of the present invention (A) component and (B) the compounding ratio of component is very important, from obtaining with the hand that is wetted with water when using For oil-based cleansing cosmetics that have good cleansing power and leave no greasy feeling after rinsing with water, it is important to make the ratio 12:5 to 1:1.

3. Preparation and test of oil-based cleansing cosmetics without deteriorating cleaning power in hard water environment (Part 1)

It is generally known that when an oil-based cleansing cosmetic is used under a hard water environment, the cleansing effect is reduced and rinsing becomes insufficient. This is considered to be due to aggregation of emulsified particles by hard water. This then results in a residual greasy feel after rinsing with water. For example, in China, there are areas where the hardness of tap water is as high as 400 or more, resulting in the aforementioned reduction in cleaning power and residual greasy feeling after washing with water. As a composition of an oil-based cleansing cosmetic that can be used in such an extremely hard water area, in addition to the components (A), (B) and (C) in the present invention, the addition of polyoxygen as a component (D) has been studied. Composition of ethylene sorbitan fatty acid ester and/or polyoxyethylene glyceryl monoisostearate (30EO), and diglyceryl monoisostearate as component (E).

(1) Composition of Examples 9-11

The composition of Table 4 below was prepared, and a test assuming use in a hard water environment was carried out.

Table 4

(2) Test method

In addition to the test carried out in the above 1., a dilution test with hard water having a hardness of 489 mg/L was similarly carried out.

In addition, in order to confirm the presence or absence of coarse particles caused by hard water, in addition to measuring the average particle diameter when diluted with hard water, the particle size distribution was also confirmed, and the appearance of a maximum peak exceeding 1 μm in the particle size distribution was observed.

(3) Results

The compositions of Examples 9-11 all have very good cleansing power, and there is no residual greasy feeling after rinsing with hard water. The upper limit of the mixing amount of water capable of maintaining the cosmetic in a transparent state was 25% by mass in each of Examples 9 to 11, and a high volume of water could be mixed. In addition, when diluted 60 times with water, the emulsified particle size is 0.2 to 0.3 μm, which is extremely small even in hard water, at 0.3 to 0.6 μm. The results of these two sets of tests confirmed good makeup removal power when used with water-wet hands and no residual greasy feeling after rinsing with hard water. In addition, the appearance of an extremely large peak exceeding 1 μm, which causes discomfort such as a residual greasy feeling during use, was not observed. The maximum peaks of Examples 9 to 11 are all below 1 μm.

Fig. 1 shows the particle size distribution diagram when the oily cleansing cosmetic material of Example 10 is diluted with water 60 times, and Fig. 2 shows the particle size distribution diagram when the oily cleansing cosmetic material of Example 10 is diluted 60 times with hard water of hardness 489mg/L. Comparing the two distribution diagrams, it can be seen that the maximum peak of the emulsion particle distribution of the oil-based cleansing cosmetic material of Example 10 appears at 0.1-1 μm in either water or hard water.

That is, since the oil-based cleansing cosmetics of Examples 9 to 11 do not aggregate emulsified particles due to hard water, and do not feel a residual greasy feeling, there is no problem in using them in areas with hard water.

4. Preparation and test of oil-based cleansing cosmetics without deteriorating cleaning power under hard water environment (Part 2)

(1) Composition of Examples 12-16

The composition of Table 5 below was prepared, and a test assuming use in a hard water environment was carried out.

table 5

(2) Test method

A test using hard water with a hardness of 489 mg/L was implemented similarly to the test of (1).

In addition, in order to confirm the presence or absence of coarse particles caused by the incorporation of hard water, in addition to measuring the average particle diameter in the case of dilution with hard water, the particle size distribution was also confirmed, and the appearance of a maximum peak exceeding 1 μm in the particle size distribution graph was observed.

(3) Results

The compositions of Examples 12-16 all have good cleansing power and no residual greasy feeling after rinsing with hard water. The upper limit of the amount of water that can maintain the cosmetic in a transparent state is 30% by mass in Example 12, 20% by mass in both Examples 13 and 14, 35% by mass in Example 15, and 20% by mass in Example 16. , can be mixed with a high volume of water. In addition, when diluted 60 times with water, the size of the emulsified particles is as small as 0.2-0.8 μm, and there is almost no difference between water and hard water. In addition, the appearance of an extremely large peak exceeding 1 μm, which causes discomfort such as a residual greasy feeling after rinsing with water, was not observed.

The following shows a recipe example of an oil-based cleansing cosmetic to which optional ingredients are added.

<prescription example>

Prescription Example 1 (Cleansing Oil)

Prescription Example 2 (Cleansing Oil)

Prescription example 3 (makeup remover gel)

The oil-based cleansing cosmetics of Prescription Examples 1 to 3 all had high cleansing power, rinsed off quickly with water, and did not leave a greasy feeling. In addition, even when washed with hard water, its performance (makeup removal power, residual greasy feeling after rinsing with water) does not change.

<Dilution test of oil-based cleansing cosmetics in formulation example 1>

Dilute the oil-based cleansing cosmetic material of Prescription Example 1 60 times with ion-exchanged water and hard water with a hardness of 489 mg/L to prepare an O/W emulsified composition, and use a laser particle size analyzer 2000 (manufactured by Malvern Instruments Ltd.) to measure according to the laser diffraction method The particle size distribution of the composition. Measurement of the volume-based average diameter and observation of the peak shape of the particle size distribution were performed.

The volume-based average diameter when diluted with ion-exchanged water was 5.114 μm, and the volume-based average diameter when diluted with hard water was 4.740 μm, and there was no difference between the two. In addition, the particle size distribution of the emulsified particles when diluted with ion-exchanged water is shown in FIG. 3 , and the particle size distribution when diluted with hard water is shown in FIG. 4 .

Two extremely large peaks appeared in the particle size distribution diagram of Fig. 3 . The peak that appears first is the peak derived from the emulsion (oil droplet particles), and appears at 0.1 to 1 μm. Then, the peak that appears at 1 to 10 μm after the maximum value is a peak derived from an oil-soluble thickener (derived from (behenic acid/eicosanedioic acid) glyceride and stearic acid) blended as an optional component. acyl inulin peak). The appearance positions of the two peaks did not change when diluted with ion-exchanged water or when diluted with hard water. Therefore, it was also confirmed from this test that the performance of the oil-based cleansing cosmetic does not change even if arbitrary components are added as in the formulation examples 1 to 3 of the present invention, and there is no remaining greasy feeling.

<Observation of the contact angle between the skin and water droplets after washing with the oil-based cleansing cosmetic of Prescription Example 1>

Wash the left upper arm with the oil-based cleansing cosmetic of Prescription Example 1 in a range of 5 cm x 5 cm, and rinse thoroughly with hard water. Thereafter, one drop of ion-exchanged water was added dropwise to the washing area, and the state of the water droplet formed when the water droplet came into contact with the skin was photographed, and the size of the contact angle was observed. As a comparative control, the oil-based cleansing cosmetic of Comparative Example 21 was used for observation in the same manner.

The image of the contact angle formed between the skin and the water drop when washing with Prescription Example 1 is shown in FIG. 5 , and the image of the contact angle formed between the skin and the water drop when washing with Comparative Example 21 is shown in FIG. 6 . Comparing the images of Fig. 5 and Fig. 6, it can be clearly seen that the skin after washing with Prescription Example 1 is in the so-called "hydrophobic" state, while Comparative Example 21 is in the state of "water fused to the skin". This means that in the case of prescription example 1, the oily cleansing cosmetic did not remain on the skin. On the other hand, it is considered that the oily cleansing cosmetic of Comparative Example 21 remained on the skin and was hydrated to the skin due to its surface active action.

The oily cleansing cosmetic material of Comparative Example 21 was diluted 60 times with ion-exchanged water, and the particle size distribution diagram of the measured particle size is shown in Fig. Makeup remains on the skin. On the other hand, since formulation example 1 did not exhibit such a distribution maximum of emulsified particles, it is considered that the oily cleansing cosmetic was quickly washed off the skin.

<Reference test example>

Using a commercially available oil-based cleansing cosmetic that was evaluated as leaving a greasy feeling by a sensory test, the left upper arm was washed in an area of 5 cm x 5 cm, and then fully rinsed with hard water. Add 1 drop of ion-exchanged water to the cleaning place, take pictures of the state of the water droplets formed when the water droplets contact the skin, and observe the size of the contact angle.

Then, the oil-based cleansing cosmetic was diluted 60 times with hard water to prepare an O/W emulsified composition, and the particle size distribution of the composition was measured by the laser diffraction method using a laser particle size analyzer 2000 (manufactured by Malvern Instruments Ltd.). Measurement of the volume-based average diameter and observation of the peak shape of the particle size distribution were performed.

The photographed image of the contact angle is shown in FIG. 8 . In addition, the particle size distribution graph is shown in FIG. 9 .

The average particle diameter of this commercially available oil-based cleansing cosmetic material is as large as 17.277 μm when it is emulsified in water, and a maximum peak appears at 1 to 10 μm in the distribution diagram of the emulsified particles.

From the measured values of the contact angle and particle size distribution, this commercially available oil-based cleansing cosmetic has an unsatisfactory characteristic that it is difficult to wash off with water.

Claims (7)

1. The cosmetic preparation 1. a kind of oiliness is removed ornaments and formal dress, it is characterised in that in the oiliness makeup removing cosmetic preparation containing A, B, C,

   A：The polyglycereol di fatty acid ester being made up of the aliphatic acid of carbon number 8~10 and the polyglycereol of average degree of polymerization 4~10,

   B：The polyglycereol two through esterification being made up of the aliphatic acid of carbon number 18~22 and the polyglycereol of average degree of polymerization 8~15 Fatty acid ester,

   C：Finish,

   A：B is 12：5~1：1.
2. The cosmetic preparation 2. oiliness according to claim 1 is removed ornaments and formal dress, it is characterised in that by carbon number 8~10 aliphatic acid with The polyglycereol di fatty acid ester that the polyglycereol of average degree of polymerization 4~10 is formed is six polyglycereol dicaprates and/or six polyglycereol Dicaprylate.
3. The cosmetic preparation 3. oiliness according to claim 1 or 2 is removed ornaments and formal dress, it is characterised in that by the fat of carbon number 18~22 The polyglycereol di fatty acid ester through esterification that the polyglycereol of acid and average degree of polymerization 8~15 is formed is the isostearic acid of ten polyglycereol two Ester and/or ten Plurol Oleique CC497s.
4. 4. the oiliness makeup removing cosmetic preparation according to any one in claims 1 to 3, it is characterised in that finish is selected from 2- second More than one in base caproic acid cetyl, methyl phenyl silicone, pond flower seed oil, 2- hexyl decyl alcohol isostearates.
5. 5. the oiliness makeup removing cosmetic preparation according to any one in Claims 1 to 4, it is characterised in that further contain D： Polyoxyethylene sorbitan fatty acid ester and/or polyoxyethylene glycerol list isostearate (30EO), and E：Two polyglycereol lists Isostearate.
6. The cosmetic preparation 6. oiliness according to claim 5 is removed ornaments and formal dress, it is characterised in that polyoxyethylene sorbitan fatty acid ester For polyoxyethylene sorbitan monostearate (20EO) and/or polyoxyethylene sorbitan monooleate (20EO).
7. 7. the oiliness makeup removing cosmetic preparation according to claim 5 or 6, it is characterised in that in measure more than hardness 400mg/L Hard water dilution and during the size distribution of caused emulsified particle, the very big peak of appearance 0.1~1 μm at.