JP7267592B2 - skin cosmetic composition - Google Patents

Description

The present invention relates to skin cosmetic compositions.

Skin cosmetic compositions containing oily ingredients such as milky lotions, creams, all-in-one gels, and serums are generally intended to normalize the barrier function and moisturizing function by supplementing the lipids of the stratum corneum, and to keep the skin healthy. used for the purpose.

On the other hand, skin cosmetic compositions are required not only to be moisturizing, but also to have a solid feel when applied, which is generally referred to as a rich feeling.

Oily components with high viscosity or paste-like oily components are generally used to impart a rich feeling, but when a large amount of such oily components are blended, stickiness and separation may occur.

Furthermore, in recent years, there has been a demand for skin cosmetic compositions that provide a long-lasting feeling of moisture immediately after use, and the effects required of skin cosmetic compositions are increasing.

For example, in Patent Document 1, phytosterol or its derivative, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, and linear or cyclic silicone oil are disclosed for the purpose of imparting a rich feeling and a non-sticky feeling in use. A skin cosmetic composition containing Patent Document 2 describes a specific polyalkylene compound for the purpose of providing a rich and rich feeling of use, good compatibility with the skin, no stickiness, a sustained moisturizing effect, and an effect of improving the flexibility of the skin. A skin cosmetic composition containing a glycol derivative and a water-soluble polymer compound is disclosed. Patent Document 3 describes specific new oleaginous surfactants, dextrin fatty acid esters and dimer acid esters, fatty acid cholesterol esters, and phytosterols for the purpose of providing a coating film with a high moisture-retaining property and giving the skin a protective feeling and a glossy feeling. A skin cosmetic composition containing one or more selected from esters and acyl amino acid esters is disclosed.

JP-A-2002-145722 JP 2013-95737 A JP 2018-203729 A

However, all of them were unsatisfactory in moist feeling, rich feeling, persistence of moist feeling, non-stickiness and storage stability.

An object of the present invention is to provide a skin cosmetic composition that imparts a moist feeling and a rich feeling to the skin, is non-sticky, maintains the moist feeling for a long time, and has excellent storage stability.

The inventor of the present invention contains (A) an acylamino acid ester, (B) a hydrocarbon that is liquid at 25° C., and (C) an alkyl acrylic acid/methacrylate copolymer, and the component (A) and the component (B) are By using a skin cosmetic composition having a mass ratio (A)/(B) of 0.25 to 4, it imparts a moist and rich feeling to the skin, is not sticky, and maintains a moist feeling for a long time. The inventors have found that a skin cosmetic composition having excellent storage stability can be obtained, and have completed the present invention.

To provide a skin cosmetic composition which imparts a moist feeling and a rich feeling to the skin, is non-sticky, maintains the moist feeling for a long time, and has excellent storage stability.

The present invention will be described in detail below.

The present invention contains (A) an acyl amino acid ester from the viewpoint of imparting a moist feeling.

The component (A) used in the present invention is an ester of an acylamino acid and an alcohol. The component (A) may contain one or more.

The acyl group of the acylamino acid is not particularly limited, but includes, for example, a caproyl group, a lauroyl group, a myristoyl group, a palmitoyl group, a stearoyl group, an oleoyl group, an isostearoyl group, a linoleyl group, and the like. lauroyl group, myristoyl group, and more preferably lauroyl group.

The amino acid moiety of the acyl amino acid is not particularly limited, but examples include glutamic acid, aspartic acid, α-alanine, β-alanine, arginine, glycine, histidine, serine, threonine, sarcosine, proline, lysine, etc. From the viewpoint of thinness, glutamic acid and β-alanine are preferred, and glutamic acid is more preferred.

Examples of alcohols include, but are not limited to, octyl alcohol, lauryl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, octyldodecyl alcohol, decyltetradecanol, phytosterol, cholesterol, and jojoba alcohol.

Although the component (A) used in the present invention is not particularly limited, it is preferably a diester, more preferably a diester having a phytosteryl group as at least one ester-forming residue, from the viewpoint of imparting a moist feeling. .

The component (A) used in the present invention is not particularly limited. -octyldodecyl), N-lauroyl-L-glutamate di(phytosteryl/behenyl/2-octyldodecyl), N-lauroyl-L-glutamate di(phytosteryl/2-octyldodecyl), N-myristoyl-N-methyl-β Alanine (phytosteryl/decyltetradecyl) and the like, preferably N-lauroyl-L-glutamic acid di(phytosteryl/2-octyldodecyl).

Examples of commercially available products of di(cholesteryl/behenyl/2-octyldodecyl) N-lauroyl-L-glutamate include ELDEW CL-301 (manufactured by Ajinomoto Co., Inc.). Eldew CL-202 (manufactured by Ajinomoto Co., Inc.) can be mentioned as a commercial product of Eldew CL-202 (manufactured by Ajinomoto Co., Inc.), and a commercial product of N-lauroyl-L-glutamic acid di(phytosteryl/behenyl/2-octyldodecyl) is Eldew PS-304 ( Ajinomoto Co., Ltd.), Eldew PS-306 (Ajinomoto Co., Ltd.), Plandool-LG1 (Nippon Seika Co., Ltd.), Plandool-LG3 (Nippon Seika Co., Ltd.), Plandool-LG4 (Nippon Seika Co., Ltd.), etc. and commercial products of N-lauroyl-L-glutamic acid di(phytosteryl/2-octyldodecyl) include Eldew PS-203 (manufactured by Ajinomoto Co.), Plandool-LG2 (manufactured by Nippon Fine Chemical Co., Ltd.) and the like. Commercial products of myristoyl-N-methyl-β-alanine (phytosteryl/decyltetradecyl) include Erdew APS-307 and the like.

The content of component (A) used in the present invention is preferably 0.08 to 16% by mass, more preferably 0.3 to 16% by mass, still more preferably 0.5 to 16% by mass. If the content of component (A) is less than 0.08% by mass, it may not impart a moist feeling. If the component (A) exceeds 16% by mass, stickiness may occur.

The present invention contains (B) a hydrocarbon that is liquid at 25° C. from the viewpoint of imparting a rich feeling.

The component (B) used in the present invention is not particularly limited, but includes, for example, hydrogenated polyisobutene, squalane, α-olefin oligomer, isododecane, liquid paraffin and the like. The component (B) may contain one or more.

Among the component (B) used in the present invention, squalane and hydrogenated polyisobutene are preferred from the viewpoint of richness and non-stickiness, and hydrogenated polyisobutene is particularly preferred.

Among the hydrogenated polyisobutenes used in the present invention, the hydrogenated polyisobutene preferably has a number average molecular weight of 220 to 2700, more preferably 280 to 1400, and still more preferably 330 to 1000 from the viewpoint of richness and non-stickiness. .

The content of component (B) used in the present invention is preferably 0.3 to 4% by mass, more preferably 0.5 to 4% by mass, still more preferably 0.7 to 4% by mass. If the content of component (B) is less than 0.3% by mass, there is a risk that a rich feeling will not be imparted. If the component (B) exceeds 4% by mass, stickiness may occur.

The skin cosmetic composition according to the present invention contains the component (A) and the component (B), and from the viewpoint of maintaining a moist feeling, the mass ratio of the component (A) and the component (B) ( A)/(B) is 0.25-4, more preferably 0.3-3, still more preferably 0.5-2.

The skin cosmetic composition according to the present invention contains the component (A) and the component (B), but from the viewpoint of non-stickiness, the total mass % of the component (A) and the component (B) ( A) + (B) is preferably 20% by mass or less, more preferably 8% by mass or less, and even more preferably 4% by mass or less.

The present invention contains (C) an alkyl acrylic acid/methacrylate copolymer from the viewpoint of imparting storage stability.

The content of component (C) used in the present invention is preferably 0.1 to 1.2% by mass, more preferably 0.1 to 0.9% by mass, and still more preferably 0.1 to 0.5% by mass. % by mass is good. If the content of component (C) is less than 0.1% by mass, storage stability may not be imparted. If the component (C) exceeds 1.2% by mass, stickiness may occur.

The pH of the skin cosmetic composition of the present invention at 20° C. is preferably 3 to 10, more preferably 4 to 9, and still more preferably 5 to 8, from the viewpoint of skin irritation.

The pH at 20 ° C. according to the present invention was measured by filling 120 g of an oil-in-water cosmetic composition prepared by a conventional method into a sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.) and measuring the pH at 20 ° C. After standing still for 48 hours, the pH of the undiluted solution is measured with a glass electrode type hydrogen ion concentration indicator (F-71, manufactured by Horiba, Ltd.).

In addition to the above essential ingredients, the skin cosmetic composition of the present invention contains various ingredients used in ordinary cosmetics, quasi-drugs, pharmaceuticals, etc., for example, oily ingredients other than the above ingredients (A) and (B). Ingredients, moisturizers, thickeners, medicinal ingredients, protein derivatives, hydrolyzed proteins, amino acids, chelating agents, stabilizers other than the above component (C), antioxidants, plant extracts, crude drug extracts, vitamins , perfumes, preservatives, dyes, pigments, powders, pH adjusters, ultraviolet absorbers, antioxidants, perfumes, and the like. However, it is not limited to these examples.

Although the viscosity of the skin cosmetic composition according to the present invention is not particularly limited, it is preferably 5,000 to 70,000 mPa·s at 20° C., more preferably 5,000 to 70,000 mPa·s, more preferably under conditions of 20° C. from the viewpoint of dripping from the palm and elongation during application. is 9,000 to 60,000 mPa·s at 20°C, more preferably 13,000 to 50,000 mPa·s at 20°C.

The viscosity under the condition of 20 ° C. according to the present invention was measured by filling 120 g of a skin cosmetic composition prepared by a conventional method into a sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.) and measuring the viscosity at 20 ° C. After standing for 48 hours, with a B-type viscometer with a helical stand (model: digital viscometer TVB-10M, manufactured by Toki Sangyo Co., Ltd.), if the viscosity is 5,000 or more and less than 50,000 mPa s, M4 Rotate at 12 rpm for 1 minute at 20 ° C. using a No. rotor, and if the viscosity is 50,000 or more and less than 100,000 mPa s, rotate at 6 rpm for 1 minute at 20 ° C. using an M4 rotor. Measured.

The skin cosmetic composition according to the present invention can be used in the form of milky lotion, cream, gel, paste, and the like. In the case of a spout pouch container, it is preferably gel-like from the viewpoint of not easily dripping from the palm.

The skin cosmetic composition according to the present invention is not particularly limited, and is filled into various containers such as jars, tubes, and pouches, and stored until use.

EXAMPLES The present invention will be described in more detail below with reference to examples, but these are not intended to limit the present invention in any way.

The evaluation tests shown in this specification were carried out while variously changing the components contained in the skin cosmetic composition and their contents. All the units indicating the content of each component are % by mass, and were prepared by a conventional method.

In the evaluation tests shown in this specification, "moist feeling", "rich feeling", "moist feeling (after 8 hours)", "non-stickiness" and "storage stability" were evaluated by the following methods.

"Moisturizing feeling"
The moist feeling of each skin cosmetic composition obtained in Examples and Comparative Examples was tested by 10 expert panelists, and whether or not they felt an excellent moist feeling immediately after application was sensory evaluated. . In the actual use test, 2 g of the skin cosmetic compositions of Examples and Comparative Examples, which had been temperature-controlled to 20°C, were uniformly applied to the entire face at room temperature of 20°C for 20 seconds. Evaluation was made on a scale of 5 (very good), 4 (better), 3 (good), 2 (bad), and 1 (very bad). After calculating the average score of all members, judgment was made according to the following criteria.
5: The average score is 4.5 or more.
4: The average score is 4.0 or more and less than 4.5.
3: The average score is 3.0 or more and less than 4.0.
2: The average score is 2.0 or more and less than 3.0.
1: The average score is less than 2.0.

"Rich feeling"
The rich feeling of each of the skin cosmetic compositions obtained in Examples and Comparative Examples was tested by 10 expert panelists, and sensory evaluations were made as to whether or not they felt an excellent rich feeling upon application. In the actual use test, 2 g of the skin cosmetic compositions of Examples and Comparative Examples, which had been temperature-controlled to 20°C, were uniformly applied to the entire face at room temperature of 20°C for 20 seconds. Evaluation was made on a scale of 5 (very good), 4 (better), 3 (good), 2 (bad), and 1 (very bad). After calculating the average score of all members, judgment was made according to the following criteria.
5: The average score is 4.5 or more.
4: The average score is 4.0 or more and less than 4.5.
3: The average score is 3.0 or more and less than 4.0.
2: The average score is 2.0 or more and less than 3.0.
1: The average score is less than 2.0.

"Moisturizing feeling (after 8 hours)"
The moist feeling (after 8 hours) of each of the skin cosmetic compositions obtained in Examples and Comparative Examples was tested by 10 expert panelists, and was evaluated from immediately after application to 8 hours after application. It was sensory evaluated whether or not the "feeling" was maintained. In the actual use test, 2 g of the skin cosmetic compositions of Examples and Comparative Examples, which were temperature-controlled to 20°C, were uniformly applied to the entire face at room temperature of 20°C for 20 seconds, and then dried in a room at 20°C for 8 hours. Time quieted. Evaluation was made on a scale of 5 (very good), 4 (better), 3 (good), 2 (bad), and 1 (very bad). After calculating the average score of all members, judgment was made according to the following criteria.
5: The average score is 4.5 or more.
4: The average score is 4.0 or more and less than 4.5.
3: The average score is 3.0 or more and less than 4.0.
2: The average score is 2.0 or more and less than 3.0.
1: The average score is less than 2.0.

"No stickiness"
The non-stickiness of each skin cosmetic composition obtained in Examples and Comparative Examples was tested by 10 expert panelists, and whether or not they felt stickiness immediately after application was sensory evaluated. In the actual use test, 2 g of the skin cosmetic compositions of Examples and Comparative Examples, which had been temperature-controlled to 20°C, were uniformly applied to the entire face at room temperature of 20°C for 20 seconds. Evaluation was made on a scale of 5 (very good), 4 (better), 3 (good), 2 (bad), and 1 (very bad). After calculating the average score of all members, judgment was made according to the following criteria.
5: The average score is 4.5 or more.
4: The average score is 4.0 or more and less than 4.5.
3: The average score is 3.0 or more and less than 4.0.
2: The average score is 2.0 or more and less than 3.0.
1: The average score is less than 2.0.

"Storage stability"
120 g of each skin cosmetic composition obtained in Examples and Comparative Examples was filled in a sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.), and left to stand in a constant temperature bath at 5°C and 40°C for 1 month and stored. After that, the appearance was visually observed and evaluated.
<Evaluation Criteria>
◯: No change is observed under any storage conditions.
x: Separated under either or both of the storage conditions.

*1: Eldew PS-203 (manufactured by Ajinomoto Co., Inc.)
*2: Eldew APS-307 (manufactured by Ajinomoto Co., Inc.)
*3: Eldew CL-202 (manufactured by Ajinomoto Co., Inc.)
*4: Pearlream 18 (manufactured by NOF Corporation) number average molecular weight: 1000
* 5: PEMULEN TR-1 (manufactured by Lubrizol Advanced Materials)
*6: Pearlream 4 (manufactured by NOF Corporation) number average molecular weight: 220
* 7: Pearlream EX (manufactured by NOF Corporation) number average molecular weight: 280
*8: Pearlream 6 (manufactured by NOF Corporation) number average molecular weight: 336
* 9: Pearlream 24 (manufactured by NOF Corporation) number average molecular weight: 1350
*10: Pearlream 46 (manufactured by NOF Corporation) number average molecular weight: 2650
*11: CARBOPOL 980 POLYMER (manufactured by Lubrizol Advanced Materials)

From Examples 1 to 29 shown in Tables 1 to 3, it was confirmed that good results were obtained with respect to moist feeling, rich feeling, continuation of moist feeling, non-stickiness and storage stability.

When various tests were conducted using Example 30, all evaluations of moist feeling, rich feeling, continuation of moist feeling, absence of stickiness, and storage stability were good.

[Example 30]
Ingredient Content (% by mass)
(A) N-lauroyl-L-glutamic acid di(phytosteryl/2-octyldodecyl) *1 1.00
(B) Hydrogenated polyisobutene * 4 0.40
(B) Hydrogenated polyisobutene *8 0.60
(C) Acrylic acid-alkyl methacrylate copolymer *5 0.40
Potassium hydroxide 0.32
1,3-butylene glycol 9.00
Concentrated glycerin 11.00
Dipropylene glycol 4.00
Disodium edetate 0.10
Methyl paraoxybenzoate 0.15
Phenoxyethanol 0.30
Carboxy vinyl polymer 0.40
Xanthan gum 0.20
Ectoine 0.01
Yeast extract (4) 0.01
Evening primrose seed extract 0.01
Himefuuro extract 0.01
Succinyl atelocollagen 0.01
Sodium hyaluronate (2) 0.01
Sorbitan stearate 0.10
Purified water 71.97
Total 100.00

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to obtain a skin cosmetic composition that imparts a moist feeling and a rich feeling to the skin, is non-sticky, maintains the moist feeling for a long time, and has excellent storage stability.

Claims (1)

(A) N-lauroyl-L-glutamate di(phytosteryl/2-octyldodecyl)
(B) Hydrogenated polyisobutene
(C) contains an acrylic acid/methacrylate alkyl copolymer, the number average molecular weight of the component (B) is 280 to 1400, and the mass ratio of the component (A) to the component (B) (A)/ (B) is 0.3 to 3, the total mass% (A) + (B) of the component (A) and the component (B) is 1.3 to 8 mass%, and the component (C) The content of the skin cosmetic composition is 0.1 to 0.9% by mass .