JP7467105B2 - Cleaning composition - Google Patents

Description

The present invention relates to a cleansing composition, and more specifically to a cleansing composition that has good foaming and foam quality (elasticity), and leaves the skin feeling smooth and moisturized after cleansing.

In recent years, an increasing number of consumers are aware that they have sensitive skin, and as a result, detergent compositions are being required to have not only a cleansing function, but also added-value functions such as skin irritation relief and moisturizing power. At the same time, basic detergent performance such as good foaming and cleansing power are also required functions.

From this viewpoint, attention has been paid to amino acid-based surfactants that can be applied in a pH range close to that of the skin and have low irritation to the skin. Developed thus far include a detergent composition that is low irritation and can be prepared with high viscosity by combining an amino acid-based surfactant, a betaine-based amphoteric surfactant, and a nonionic surfactant (e.g., Patent Document 1); a detergent composition that has cleaning properties, biofilm removing properties, and low skin irritation by combining a higher fatty acid salt, an acyl glycine salt, an acylaspartate, and an acyl methyl taurine salt (e.g., Patent Document 2); a detergent composition that is gentle on the skin, has fine texture, and produces foam that adheres well to the skin by combining an N-acyl glutamate and an N-acylaspartate (e.g., Patent Document 3); and a detergent composition that is low irritation to the skin and produces rich foam by combining an acylaspartate and an acyl methyl taurine magnesium salt (e.g., Patent Document 4).
JP 2016-74905 A JP 2015-105262 A JP 2014-5230 A JP 2018-131542 A

However, although these cleansing compositions take advantage of the characteristics of amino acid-based surfactants, such as their mildness on the skin, they are inadequate in terms of foaming and foam quality (elasticity), which are essential factors when consumers use cleansing products such as face washes and body soaps.

In light of this, there is a demand for cleansing compositions that have good foaming and foam quality (elasticity), and that do not leave the skin feeling squeaky clean after cleansing, leaving it with a moist feel.

The present invention was made in consideration of the above problems, and its purpose is to provide a cleansing composition that has good foaming and foam quality (elasticity), and that leaves the skin feeling smooth and moisturized after cleansing.

As a result of intensive research conducted by the inventors in order to achieve the object of the present invention, they discovered that by combining a specific fatty acid salt with an N-acylasparagine salt and an N-acylmethyltaurine salt, a cleanser composition can be obtained that has good foaming and foam quality (elasticity), does not leave the skin feeling rough after washing, and has a moist feel, and thus completed the present invention.

The first invention is
The detergent composition is characterized by comprising: (A) a fatty acid salt containing a myristate salt but not containing a laurate salt; (B) an N-acylaspartate salt; and (C) an N-acylmethyltaurine salt.

The second invention is the cleaning composition according to the first invention, further comprising (D) an amphoteric surfactant.

The third invention is a cleaning composition according to the first or second invention, further comprising (E) an alkyl polyglucoside.

The fourth invention is a cleaning composition according to any one of the first to third inventions, in which component (A) contains 3 to 12 mass % of myristate salt.

The present invention provides a cleansing composition that has good foaming and foam quality (elasticity), and leaves the skin feeling smooth and moist after cleansing.

The cleaning composition of the present invention is described in detail below.

<Component (A) Fatty acid salt containing myristate and not containing laurate>
The component (A) used in the detergent composition of the present invention is a fatty acid salt containing myristate but not laurate. The incorporation of component (A) can improve foaming and foam quality (elasticity). The fatty acid constituting the fatty acid salt preferably contains a saturated fatty acid having 14 carbon atoms from the viewpoint of foaming and foam quality (elasticity). In addition, from the viewpoint of skin irritation, it is preferable that the fatty acid does not contain a fatty acid salt having 12 or less carbon atoms. For example, single fatty acids such as myristic acid, palmitic acid, and stearic acid, fatty acids derived from coconut oil fatty acid, beef tallow fatty acid, castor oil fatty acid, olive oil fatty acid, palm oil fatty acid, and mixtures thereof can be mentioned. Examples of salts constituting the fatty acid salt include alkali metal salts such as sodium salts and potassium salts, lower alkanolamine salts, etc., but sodium salts and potassium salts are preferred, and potassium salts are particularly preferred from the viewpoint of stability.

In addition, from the viewpoint of reducing irritation to the skin, the fatty acid salt in the present invention is a salt of a fatty acid other than lauric acid. Lauric acid salts are undesirable because they penetrate into the stratum corneum and disrupt intercellular lipids, which causes high irritation to the skin. Lauric acid is known to be an ingredient with excellent cleansing power, foaming (foaming ability), and foam durability, but the present invention does not contain lauric acid salts, and by combining salts of fatty acids other than lauric acid with other specified essential ingredients, it is excellent in that it reduces irritation to the skin while providing good foaming and foam quality (elasticity).

Specific examples of component (A) used in the detergent composition of the present invention include sodium myristate, sodium palmitate, sodium stearate, sodium isostearate, sodium oleate, potassium myristate, potassium palmitate, potassium stearate, potassium isostearate, potassium oleate, triethanolamine myristate, triethanolamine palmitate, triethanolamine stearate, triethanolamine isostearate, triethanolamine oleate, sodium tallow fatty acid, sodium castor fatty acid, sodium olive oil fatty acid, sodium palm oil fatty acid, potassium tallow fatty acid, potassium castor fatty acid, potassium olive oil fatty acid, potassium palm oil fatty acid, triethanolamine tallow fatty acid, triethanolamine castor fatty acid, triethanolamine olive oil fatty acid, triethanolamine palm oil fatty acid, etc. In the detergent composition of the present invention, these higher fatty acid salts can be used alone or in combination of two or more.

In the cleansing composition of the present invention, the blending amount of component (A) is preferably 3 to 15% by mass, and more preferably 5 to 10% by mass. At 3% by mass or more, good foam volume and foam quality (elasticity) are obtained, and at 15% by mass or less, the skin does not feel too rough after washing, and a moist feel is obtained. When two or more types are used in combination, the total amount is the sum of them.

In addition, component (A) of the present invention preferably contains 3 to 12 mass% of myristate salt based on the total mass of the detergent composition. By containing myristate salt in the above content, it is preferable that the myristate salt is quickly adsorbed to the foam film and a strong foam film is easily formed, resulting in good foaming and foam quality. It is also preferable that it is combined with components (B) and (C) described in detail below, because it synergistically improves foaming and foam quality.

<Component (B) N-acylaspartate>
Component (B) used in the cleansing composition of the present invention is an N-acylaspartate. By incorporating component (B), it is possible to suppress the squeaking of the skin after cleansing and impart a moist skin feel. The acyl group is preferably a fatty acid residue having 8 to 22 carbon atoms, and examples thereof include single acyl groups such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and oleic acid, acyl groups derived from coconut oil fatty acid, beef tallow fatty acid, castor oil fatty acid, olive oil fatty acid, palm oil fatty acid, and the like, and mixtures thereof. Examples of salts of amino acid-based surfactants include alkali metal salts such as sodium salts and potassium salts, and lower alkanolamine salts, and the like, with sodium salts and potassium salts being preferred.

Specific examples of component (B) N-acylaspartates used in the detergent composition of the present invention include sodium lauroyl aspartate, sodium myristoyl aspartate, sodium oleyl aspartate, etc. In the detergent composition of the present invention, these sodium N-acylaspartates can be used alone or in combination of two or more.

In the cleansing composition of the present invention, the amount of component (B) N-acylaspartate is preferably 0.5 to 7% by mass, more preferably 1.5 to 4% by mass. A content of 0.5% by mass or more gives a moist feel to the skin after cleansing, and a content of 7% or less is preferred because it produces fine foam. When two or more types are used in combination, the total amount is the sum of the two.

<Component (C) N-Acylmethyltaurine Salt>
Component (C) used in the cleaning composition of the present invention is an N-acylmethyl taurate salt. The incorporation of component (C) results in finer foam quality. The acyl group is preferably a fatty acid residue having 8 to 22 carbon atoms, and examples thereof include single acyl groups such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and oleic acid, acyl groups derived from coconut oil fatty acid, beef tallow fatty acid, castor oil fatty acid, olive oil fatty acid, palm oil fatty acid, and mixtures thereof.

Specific examples of the N-acylmethyltaurine salts of component (C) used in the cleaning composition of the present invention include sodium lauroyl methyl taurine, sodium myristoyl methyl taurine, magnesium lauroyl methyl taurine, etc. In the cleaning composition of the present invention, these N-acylmethyltaurine salts can be used alone or in combination of two or more.

In the cleaning composition of the present invention, the blending amount of component (C) N-acylmethyltaurine salt is preferably 0.5 to 7 mass %, more preferably 1.5 to 4 mass %. At 0.5 mass % or more, the foam becomes fine, and at 7% or less, the stability over time is good. When two or more kinds are used in combination, the blending amount is the sum of them.

<Component (D): Amphoteric Surfactant>
Component (D) used in the cleansing composition of the present invention is an amphoteric surfactant. By incorporating component (D), the squeaky feeling of the skin after cleansing can be further reduced. The amphoteric surfactant is not particularly limited, but examples thereof include lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, lauryl dimethyl amino acetate betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, sodium lauryl aminodiacetate, sodium β-aminopropionate, and N-lauroyl-N'-carboxymethyl-N'-hydroxyethyl ethylenediamine sodium, and one or more of these may be appropriately selected and used.

In the cleansing composition of the present invention, the amount of component (D) amphoteric surfactant is preferably 2 to 10% by mass, and more preferably 3 to 7% by mass. At 2% or more, the skin does not feel squeaky after cleansing, and at 10% or less, the skin does not feel sticky after cleansing and feels moist, which is preferable. When two or more types are used in combination, the amount is the sum of the two.

<Component (E) Alkyl Polyglucoside>
The component (E) used in the detergent composition of the present invention is an alkyl polyglucoside. By incorporating the component (E), it is possible to impart a more moist feel to the skin after washing. Specific examples include decyl glucoside, lauryl glucoside, myristyl glucoside, cocoyl glucoside, etc. These alkyl polyglucosides can be commercially available products, and specific examples include Mydol 10, Mydol 12 (both manufactured by Kao Corporation), Plantacare series such as Plantacare 2000UP, Plantacare 1200UP, Plantacare 818UP, Plantacare 800UP, etc. (all manufactured by BASF), etc. In the detergent composition of the present invention, these alkyl polyglucosides can be used alone or in combination of two or more kinds.

In the cleansing composition of the present invention, the amount of component (E) alkyl polyglucoside is preferably 1 to 7%. At 1% or more, the skin feels moisturized after cleansing, while at 7% or less, the sticky feeling characteristic of alkyl polyglucosides is not left behind, which is preferable in terms of feel.

<Other ingredients>
In addition to the above-mentioned components, the cleaning composition of the present invention may contain other components as appropriate within the scope of the object of the present invention, such as anionic surfactants (excluding the above-mentioned component (C)), nonionic surfactants, powders (pigments, colorants, resins, etc.), physiologically active components, antioxidants, sequestering agents, preservatives, ultraviolet absorbers, fragrances, moisturizers, salts, solvents, pearlizing agents, neutralizing agents, insect repellents, enzymes, etc.

The anionic surfactant is not particularly limited, and examples thereof include triethanolamine lauryl sulfate, ammonium lauryl sulfate, sodium lauryl ether sulfate, sodium polyoxyethylene lauryl ether sulfate, potassium polyoxyethylene coconut oil fatty acid amide ether sulfate, sodium lauryl phosphate, and sodium polyoxyethylene lauryl ether acetate, and one or more of these may be selected and used as appropriate.

The nonionic surfactant is not particularly limited, but examples thereof include polyoxyethylene cetyl ether, sorbitan monostearate, polyoxyethylene sorbitan triisostearate, polyoxyethylene hydrogenated castor oil, polyoxyethylene monoisostearate, polyoxyethylene glyceryl dioleate, coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, coconut oil fatty acid N-methylethanolamide, polyoxyethylene polyoxypropylene glycol, polyethylene glycol monolaurate, and the like, and one or more of these may be selected and used as appropriate.

The above powders include, for example, pigments such as Red No. 201, Yellow No. 4, Blue No. 1, and Black No. 401; lake pigments such as Yellow No. 4 Al Lake and Yellow No. 203 Ba Lake; nylon powder, silk powder, silicone powder, cellulose powder, silicone elastomer spherical powder, polymers such as polyethylene powder, colored pigments such as yellow iron oxide, red iron oxide, chromium oxide, carbon black, ultramarine, and Prussian blue; white pigments such as zinc oxide and titanium oxide; extender pigments such as talc, mica, sericite, and kaolin; pearl pigments such as titanium mica; metal salts such as barium sulfate, calcium carbonate, magnesium carbonate, and magnesium silicate; inorganic powders such as silica and alumina; bentonite, smectite, and boron nitride. There are no particular limitations on the shape of these powders (spherical, rod-like, needle-like, plate-like, irregular, flaky, spindle-like, etc.).

The above-mentioned physiologically active ingredients include substances that impart some kind of physiological activity to the skin when applied to the skin. Examples include anti-inflammatory agents, anti-aging agents, UV protection agents, tightening agents, antioxidants, moisturizing agents, blood circulation promoters, antibacterial agents, bactericides, drying agents, cooling agents, warming agents, vitamins, amino acids, wound healing promoters, irritation relief agents, analgesics, cell activators, enzyme components, etc. The above-mentioned physiologically active ingredients include natural plant extracts, seaweed extracts, herbal ingredients, compounds, etc., of which natural plant extracts, seaweed extracts, and herbal ingredients are particularly preferred in terms of safety.

Examples of the above-mentioned natural plant extracts, seaweed extracts, and herbal medicines include angelica extract, amacha extract, althea extract, aloe extract, apricot extract, ginkgo extract, fennel extract, oolong tea extract, angelica tree extract, scutellaria extract, phellodendron bark extract, hypericum extract, Dutch mustard extract, orange extract, seawater dried product, seaweed extract, hydrolyzed wheat powder, hydrolyzed silk, chamomile extract, carrot extract, artemisia capillaris extract, licorice extract, kakyoku extract, kiwi extract, cucumber extract, gardenia extract, kumazasa extract, sophora flavescens extract, walnut extract, grapefruit extract, chlorella extract, mulberry extract, black tea extract, yeast extract, collagen, salvia extract, soapwort extract, hawthorn extract, rehmannia extract, lithospermum extract, perilla extract, linden extract, peony extract, white birch extract, and horsetail extract , ivy extract, hawthorn extract, elderberry extract, yarrow extract, peppermint extract, sage extract, cnidium rhizome extract, swertia britannica extract, soybean extract, tsinga extract, thyme extract, tea extract, clove extract, tangerine peel extract, angelica extract, peach kernel extract, dokudami extract, tomato extract, natto extract, carrot extract, garlic extract, wild rose extract, honey, witch hazel extract, sedge extract, bisabolol, loquat extract, poria extract, propolis, loofah extract, peppermint extract, linden extract, hop extract, madonna lily flower extract, horse chestnut extract, soapberry extract, melissa extract, peach extract, saxifrage extract, yuzu extract, mugwort extract, lavender extract, lemon extract, astragalus extract, rosemary extract, royal jelly extract, etc.

In addition, examples of ingredients other than the above-mentioned natural plant extract ingredients, seaweed extract ingredients, and herbal medicine ingredients include biopolymers such as deoxyribonucleic acid, collagen, elastin, chitin, chitosan, and hydrolyzed eggshell membrane; moisturizing ingredients such as amino acids, sodium lactate, urea, sodium pyrrolidone carboxylate, betaine, and whey; oily ingredients such as sphingolipids, ceramide, cholesterol, cholesterol derivatives, and phospholipids; anti-inflammatory agents such as ε-aminocaproic acid, glycyrrhizic acid, β-glycyrrhetinic acid, lysozyme chloride, guaiazulene, and hydrocortisone;
Examples of the active ingredients include vitamins such as vitamins (A, B2, B6, C, D, E), calcium pantothenate, biotin, nicotinamide, and vitamin C ester; active ingredients such as allantoin, diisopropylamine dichloroacetate, and 4-aminomethylcyclohexanecarboxylic acid; antioxidants such as tocopherol, carotenoids, flavonoids, tannins, lignans, and saponins; cell activators such as α-hydroxy acids and β-hydroxy acids; blood circulation promoters such as γ-oryzanol and vitamin E derivatives; bactericides such as isopropylmethylphenol, triclosan, hinokitiol, and benzalkonium chloride; cooling agents such as 1-menthol and peppermint oil; and wound healing agents such as retinol and retinol derivatives.

The detergent composition of the present invention can be suitably used as a skin detergent, such as for face washing, cleansing, body shampoo, hand soap, shaving products, and massage products. Each of these can be used in the form of a viscous liquid, cream, etc., and is particularly suitable for use as a face washing foam and liquid body shampoo.

The present invention will now be described in detail with reference to examples, but the present invention is not limited thereto. Prior to the examples, the test and evaluation methods used in each example will be explained.

a) Test method for foaming, foam quality (elasticity), and moist feel on skin after washing A panel of 10 experts used the body shampoos of the Examples and Comparative Examples and performed a sensory evaluation on the foaming during use, foam quality (elasticity), the absence of squeaky feeling on skin after washing, and the moist feel on skin after washing. The evaluation criteria were as follows:
[Foaming during use]
◎: Very good, 8 or more subjects answered that the foam is good. ○: Good, 6 or more but less than 8 subjects answered that the foam is good. △: Slightly bad, 4 or more but less than 6 subjects answered that the foam is good. ×: Poor, less than 4 subjects answered that the foam is good. [Foam quality (elasticity) during use]
◎: Extremely good The number of subjects who answered that the foam quality (elasticity) is good is 8 or more. ○: Good The number of subjects who answered that the foam quality (elasticity) is good is 6 or more but less than 8. △: Slightly bad The number of subjects who answered that the foam quality (elasticity) is good is 4 or more but less than 6. ×: Poor The number of subjects who answered that the foam quality (elasticity) is good is less than 4. [No squeaking of the skin after washing]
◎: Very good, 8 or more subjects answered that their skin did not feel squeaky. ○: Good, 6 or more but less than 8 subjects answered that their skin did not feel squeaky. △: Fairly bad, 4 or more but less than 6 subjects answered that their skin did not feel squeaky. ×: Bad, less than 4 subjects answered that their skin did not feel squeaky. [Moisturized feel of skin after cleansing]
◎: Very good, 8 or more subjects answered that it felt moist. ○: Good, 6 or more but less than 8 subjects answered that it felt moist. △: Fairly bad, 4 or more but less than 6 subjects answered that it felt moist. ×: Bad, less than 4 subjects answered that it felt moist.

Examples 1 to 10, Comparative Examples 1 to 7
Body washes with the compositions shown in Table 1 were prepared, and the foaming and foam quality (elasticity), the lack of squeaking on the skin after washing, and the moist feeling on the skin after washing were examined. The results are also shown in Table 1.

As is clear from Table 1, the body shampoo compositions of Examples 1 to 10 using the components of the present invention all showed superior performance compared to the compositions of Comparative Examples 1 to 7.

Other formulation examples of the facial cleansing composition of the present invention are given below. The facial cleansing compositions of these formulation examples were also examined for foaming, foam quality (elasticity), lack of squeaking on the skin after cleansing, and moisturized feel on the skin after cleansing.

Formulation example: Facial cleanser (1) Potassium myristate 12.0
(2) Potassium palmitate 2.0
(3) Potassium stearate 1.0
(4) Sodium myristoyl aspartate 10.0

(5) Methyl cocoyl taurine magnesium 10.0
(6) Lauryl glucoside 2.5
(7) Cocamidopropyl betaine 3.0
(8) Sodium cocoamphoacetate 2.0

(9) Dimethyldiallylammonium chloride-acrylamide copolymer 0.5

(10) Hydroxypropyl methylcellulose 0.5
(11) Di(phytosteryl/octyldodecyl) lauroyl glutamate 0.5

(12) Ceramide 2 0.1
(13) Ceramide 5 0.1
(14) Glycosyltrehalose 1.5
(15) edetate disodium 0.2
(16) Phenoxyethanol 0.5
(17) DPG 2.0
(18) Glycerin 5.0
(19) Fragrance 0.2
(20) Purified water, balance

A facial cleanser of the above composition was prepared in the usual manner, and the foaming, foam quality (elasticity), lack of squeaking on the skin after washing, and moist feeling on the skin after washing were evaluated. As with the examples, all properties were excellent, and good results were obtained.

Claims (3)

(A) myristate , palmitate and stearate,
(B) N-acylaspartate ,
(C) sodium N-acylmethyltaurine or magnesium N-acylmethyltaurine,
water,
Contains
the blending amount of the myristate is 1.5 to 12 mass%, the blending amount of the palmitate is 0.5 to 1 mass%, the blending amount of the stearate is 0.1 to 1 mass%, the blending amount of the N-acylaspartate is 0.5 to 7 mass%, and the blending amount of the sodium N-acylmethyltaurate or the magnesium N-acylmethyltaurate is 0.5 to 7 mass%, based on the total mass of the detergent composition;
A cleaning composition comprising no fatty acid salt having 12 or less carbon atoms . The cleaning composition according to claim 1, further comprising (D) an amphoteric surfactant. The cleaning composition according to claim 1 or 2, further comprising (E) an alkyl polyglucoside.