Gel cosmetics

Abstract

To provide a gel-like cosmetic which imparts a moist feeling, has good spreadability and compatibility with the skin, causes no stickiness and does not cause sagging of the cosmetic.SOLUTION: There is provided a gel-like cosmetic which comprises (A) a sodium polyacrylate, (B) a starch-sodium acrylate graft copolymer and (C) an acryloyldimethyl taurate copolymer and imparts a moist feeling, has good spreadability and compatibilty with the skin, causes no stickiness and does not cause sagging of the cosmetic.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a gel cosmetic, and more particularly to a gel cosmetic that imparts a moist feeling, spreads well on the skin, is non-sticky, and does not cause the cosmetic to smudge. [Background technology]

[0002] In daily life, skin is exposed to dry environments all year round due to the effects of indoor air conditioning in the summer and heating in the winter. To address these conditions, various cosmetic formulations that moisturize the skin, such as lotions, emulsions, creams, and gels, have been developed. Among these cosmetic formulations, gel-type cosmetic formulations are in high demand because they provide a high level of moisturizing effect and can be easily applied to the skin without dripping.

[0003] Conventionally, gel cosmetics have been blended with various thickeners, such as carboxyvinyl polymers and xanthan gum, in order to form a gel formulation. However, gel cosmetics blended with these thickeners have the problem of poor spreadability and poor compatibility with the skin, and are prone to stickiness. Furthermore, gel cosmetics blended with a relatively high amount of thickener may cause eraser-like creasing due to the thickener when applied to the skin.

[0004] Patent Document 1 discloses that a gel cosmetic containing at least one type of water-absorbing powder having a water absorption capacity of 20 to 30 times its own weight and at least one type of granular water-absorbing polymer having a water absorption capacity of 100 times or more its own weight, wherein the total blend amount of these is 1 to 4.5% by mass, and the viscosity of the cosmetic is 50,000 to 150,000 mPa·s, can improve moist feeling, stickiness, and smearing of the cosmetic.

[0005] Patent Document 2 discloses that a water-based gel composition characterized by containing 15 to 50 mass % of a silicone powder dispersion obtained by dispersing silicone powder in water, 0.1 to 30 mass % of a moisturizer, and 0.01 to 2 mass % of a water-soluble polymer, in terms of pure content, can improve stickiness, compatibility with the skin, and smearing of cosmetics.

[0006] Patent Document 3 discloses that a gel cosmetic containing a polyacrylic acid-based water-absorbent polymer having an average particle size of 1 to 30 μm and a water absorption capacity of 5 to 50 g / g can improve moisturizing feeling and stickiness. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] International Publication No. 2020 / 138424 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-175677 [Patent Document 3] Japanese Patent Application Laid-Open No. 2016-121140 Summary of the Invention [Problem to be solved by the invention]

[0008] However, although Patent Document 1 examines moist feeling, stickiness, and smearing of the cosmetic, it does not examine spreadability or compatibility with the skin.

[0009] Patent Document 2 examines stickiness, compatibility with the skin, and smearing of the cosmetic, but does not examine moist feeling or spreadability.

[0010] Patent Document 3 examines moisturizing feeling and stickiness, but does not examine spreadability, compatibility with the skin, or smearing of the cosmetic.

[0011] Therefore, an object of the present invention is to provide a gel-type cosmetic that imparts a moist feeling, spreads well and blends well with the skin, is not sticky, and does not cause the cosmetic to smudge. [Means for solving the problem]

[0012] As a result of extensive research, the present inventors have discovered that a gel cosmetic containing (A) sodium polyacrylate, (B) a starch-sodium acrylate graft copolymer, and (C) an acryloyldimethyltaurate copolymer can be given a moist feel, spreads well on the skin, blends well, is not sticky, and does not cause the cosmetic to smudge, and have thus completed the present invention. [Effects of the Invention]

[0013] The present invention provides a gel-like cosmetic that imparts a moist feeling, spreads well and blends well with the skin, is not sticky, and does not cause the cosmetic to smudge. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be described in detail below. Note that the units indicating the contents are all % by mass unless otherwise specified.

[0015] In the present invention, "smearing of cosmetics" refers to eraser shavings that appear when a gel-type cosmetic is being applied to the skin.

[0016] The present invention contains (A) sodium polyacrylate from the viewpoints of compatibility with the skin and non-stickiness.

[0017] The component (A) used in the present invention is not particularly limited, but an example thereof is AQUPEC MGN40R (manufactured by Sumitomo Seika Chemicals Co., Ltd.).

[0018] The content of the component (A) used in the present invention is not particularly limited, but is preferably 0.2 to 3%, more preferably 0.5 to 2%, and even more preferably 0.8 to 1.5%. If the component (A) is less than 0.2%, the cosmetic composition may not blend well with the skin or may become sticky. If the component (A) is more than 3%, the cosmetic composition may not provide a moist feeling, spread well, or blend well with the skin, or may become smudged.

[0019] The present invention contains (B) a starch-sodium acrylate graft copolymer from the viewpoints of moist feeling, good spreadability, and lack of smudges in the cosmetic preparation.

[0020] The component (B) used in the present invention is not particularly limited, but examples thereof include Salandur ST-100MC (manufactured by Sanyo Chemical Industries, Ltd.), Salandur ST-100SP (manufactured by Sanyo Chemical Industries, Ltd.), Salandur 1000 (manufactured by Sanyo Chemical Industries, Ltd.), Salandur 300SP (manufactured by Sanyo Chemical Industries, Ltd.), Salandur 300 (manufactured by Sanyo Chemical Industries, Ltd.), MAKIMOUSSE 7 (manufactured by Daito Chemical Industries, Ltd.), MAKIMOUSSE 12 (manufactured by Daito Chemical Industries, Ltd.), MAKIMOUSSE 25 (manufactured by Daito Chemical Industries, Ltd.), and MAKIMOUSSE 400 (manufactured by Daito Chemical Industries, Ltd.).

[0021] Of the components (B) used in the present invention, Saranjur ST-100MC (manufactured by Sanyo Chemical Industries, Ltd.) is preferred from the viewpoints of moist feeling, good spreadability, and lack of smudging of the cosmetic.

[0022] The content of the (B) component used in the present invention is not particularly limited, but is preferably 0.05 to 1%, more preferably 0.1 to 0.5%, and even more preferably 0.15 to 0.3%. If the (B) component is less than 0.05%, the moist feeling and spreadability may be poor, and the cosmetic may become smudged. If the (B) component is more than 1%, the spreadability and compatibility with the skin may be poor, and the cosmetic may become sticky and become smudged.

[0023] The present invention contains (C) an acryloyldimethyl taurate salt copolymer from the viewpoints of moist feeling, good spreadability, compatibility with the skin, and lack of smearing of the cosmetic.

[0024] The acryloyldimethyltaurate salt copolymer of component (C) used in the present invention is not particularly limited, and examples thereof include (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, (HEA / sodium acryloyldimethyltaurate / steareth-20 methacrylate) copolymer, (acrylamide / sodium acryloyldimethyltaurate / acrylic acid) copolymer, (acrylamide / sodium acryloyldimethyltaurate) copolymer, (sodium acrylate / sodium acryloyldimethyltaurate / acrylamide) copolymer, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (sodium acryloyldimethyltaurate / Examples of the crosspolymer include PEG-8 diacrylate crosspolymer, sodium acryloyldimethyltaurate / methacrylamidolauric acid copolymer, ammonium acryloyldimethyltaurate / carboxyethylammonium acrylate crosspolymer, ammonium acryloyldimethyltaurate / steareth-25 methacrylate crosspolymer, ammonium acryloyldimethyltaurate / steareth-8 methacrylate copolymer, ammonium acryloyldimethyltaurate / laureth-7 methacrylate copolymer, dimethylacrylamide / sodium acryloyldimethyltaurate crosspolymer, sodium polyacryloyldimethyltaurate, ammonium polyacryloyldimethyltaurate, polyacrylate crosspolymer-6, polyacrylate crosspolymer-11, and polyacrylate-13.

[0025] Of the components (C) used in the present invention, (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer and (ammonium acryloyldimethyltaurate / VP) copolymer are preferred from the viewpoints of moist feeling, good spreadability, compatibility with skin, and lack of smudging of the cosmetic composition.

[0026] The content of the (C) component used in the present invention is not particularly limited, but is preferably 0.05 to 1%, more preferably 0.1 to 0.5%, and even more preferably 0.15 to 0.3%. If the (C) component is less than 0.05%, the moist feeling, spreadability, and compatibility with the skin may be poor, and the cosmetic may become smudged. If the (C) component is more than 1%, the spreadability and compatibility with the skin may be poor, and the cosmetic may become sticky and become smudged.

[0027] The hardness of the gel cosmetic of the present invention is preferably 10 to 150 g at 20° C., from the viewpoint of ease of scooping with fingers.

[0028] The hardness of the gel cosmetic of the present invention at 20°C was measured by filling 120 g of the gel cosmetic obtained by conventional preparation into a 140 g sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.), leaving it to stand at 20°C for one day to adjust the temperature, and then measuring the peak stress (unit: g) when a 15 mm diameter adapter was inserted 30 mm at a speed of 60 mm / min using a creep meter (Model: RE3305S, manufactured by Yamaden Co., Ltd.).

[0029] The pH of the gel cosmetic of the present invention is preferably 4 to 9 at 20°C from the viewpoint of hardness stability.

[0030] The pH of the gel cosmetic preparation of the present invention at 20°C was measured using a glass electrode hydrogen ion concentration indicator (F-71, manufactured by Horiba, Ltd.) after allowing the gel cosmetic preparation prepared by a conventional method to stand at 20°C for one day and adjusting the temperature.

[0031] In addition to the essential components described above, the gel cosmetic of the present invention may contain at least one selected from various components used in ordinary cosmetics, quasi-drugs, pharmaceuticals, etc., such as polymers other than the components (A), (B), and (C), moisturizers, surfactants, oily components, chelating agents, protein derivatives, hydrolyzed proteins, stabilizers, antioxidants, plant extracts, vitamins, preservatives, coloring matter, pigments, powders, ultraviolet absorbers, fragrances, etc., to the extent that the effects are not impaired. However, the components are not limited to these examples. [Example]

[0032] The present invention will be described in more detail below with reference to examples, but these examples are not intended to limit the present invention in any way.

[0033] In the evaluation tests described herein, the components contained in the gel cosmetic preparations and their contents were varied. The units used to indicate the contents of each component are all % by mass, and the preparations were carried out using standard methods.

[0034] In the evaluation test methods shown in this specification, "moist feeling," "good spreadability," "skin compatibility," "non-stickiness," and "non-smearing of the cosmetic" were evaluated by the following methods.

[0035] "Moisturizing" The moisturizing sensation of the gel cosmetics obtained in the Examples and Comparative Examples was evaluated by a panel of 15 experts. In the evaluation test, 1 g of the gel cosmetics obtained in the Examples and Comparative Examples, which had been adjusted to 20°C, was applied evenly to the entire face at room temperature of 20°C and humidity of 60%, and the moisturizing sensation was evaluated sensorily. <Evaluation criteria> 5: More than 13 out of 15 people felt that it was moisturizing. 4: Between 10 and 12 out of 15 people felt that it was moist. 3: Between 7 and 9 out of 15 people felt that it was moist. 2: Between 4 and 6 out of 15 people felt that it was moist. 1: Fewer than 3 out of 15 people felt it was moist.

[0036] "Good stretch" The spreadability of the gel cosmetics obtained in the Examples and Comparative Examples was evaluated by a panel of 15 experts. In the evaluation test, 1 g of the gel cosmetics obtained in the Examples and Comparative Examples, which had been adjusted to 20°C, was applied evenly to the entire face at room temperature of 20°C and humidity of 60%, and the spreadability was evaluated sensorily. <Evaluation criteria> 5: More than 13 out of 15 people felt that the stretch was good. 4:15 people felt that between 10 and 12 people had good stretch. 3:7 to 9 out of 15 people felt that the stretch was good. 2: Out of 15 people, between 4 and 6 felt that the stretch was good. 1:15 Less than 3 people felt that the stretch was good.

[0037] "Skin compatibility" A panel of 15 experts evaluated the compatibility of the gel cosmetics obtained in the Examples and Comparative Examples with the skin. In the evaluation test, 1 g of the gel cosmetics obtained in the Examples and Comparative Examples, which had been adjusted to 20°C, was applied evenly to the entire face at room temperature of 20°C and humidity of 60%, and compatibility with the skin was evaluated sensorily. <Evaluation criteria> 5: More than 13 out of 15 people felt that it blended well with their skin. 4: Between 10 and 12 out of 15 people felt that the product blended well with their skin. 3: Between 7 and 9 out of 15 people felt that the product blended well with their skin. 2: Between 4 and 6 out of 15 people felt that the product blended well with their skin. 1: Fewer than 3 out of 15 people felt that it blended well with their skin.

[0038] "Non-sticky" A panel of 15 experts evaluated the non-stickiness of the gel cosmetics obtained in the Examples and Comparative Examples. In the evaluation test, 1 g of the gel cosmetics obtained in the Examples and Comparative Examples, which had been adjusted to 20°C, was applied evenly to the entire face at room temperature of 20°C and humidity of 60%, and the non-stickiness was evaluated sensorily. <Evaluation criteria> 5: More than 13 out of 15 people did not feel sticky. 4: Of the 15 people, between 10 and 12 did not feel sticky. 3: Between 7 and 9 out of 15 people did not feel sticky. 2: Between 4 and 6 out of 15 people did not feel sticky. 1: Fewer than 3 out of 15 people felt it was sticky.

[0039] "No smudging of cosmetics" A single expert panelist evaluated the non-smearing properties of the gel cosmetics obtained in the Examples and Comparative Examples. The evaluation test involved applying 1 g of the gel cosmetics obtained in the Examples and Comparative Examples, which had been adjusted to 20°C, evenly to the entire face at room temperature of 20°C and humidity of 60%, and evaluating the non-smearing properties of the cosmetics using a sensory test. <Evaluation criteria> ⊚: No creasing of the cosmetic occurred. ◯: When using the gel cosmetic, there was no noticeable smearing of the cosmetic. ×: The cosmetic was distorted.

[0040] [Table 1]

[0041] [Table 2]

[0042] [Table 3]

[0043] Examples 1 to 20 shown in Tables 1 to 3 showed good results in terms of moist feeling, good spreadability, compatibility with the skin, non-stickiness, and non-smearing of the cosmetic.

[0044] Example 21 of the gel cosmetic is described below.

[0045] The gel cosmetic obtained in Example 21 exhibited good results in terms of moist feeling, good spreadability, compatibility with the skin, non-stickiness, and non-smearing of the cosmetic.

[0046] Example 21 Component Content (mass%) (A) Sodium polyacrylate*1 1.20 (B) Starch-sodium acrylate graft copolymer*3 0.20 (C) (Acryloyldimethyltaurate ammonium / Beheneth-25 methacrylate crosspolymer*4 0.20 Disodium edetate 0.05 Phenoxyethanol 0.30 Glycerin Mono 2-Ethylhexyl Ether 0.20 Dipropylene glycol 4.00 Silica anhydride 1.00 Fragrance 0.35 Peppermint oil 0.10 Polyoxyethylene hydrogenated castor oil (60E.O.) 1.00 Concentrated glycerin 2.00 Aloe extract (2) 0.01 Peony extract 0.01 Artichoke Leaf Extract 0.01 Coix seed extract 0.01 Evening Primrose Seed Extract 0.01 Lemongrass Leaf / Stem Extract 0.01 Purified water 89.34 Total 100.00 *1: AQUPEC MG N40R (manufactured by Sumitomo Seika Chemicals Co., Ltd.) *3: Saranjur ST-100MC (manufactured by Sanyo Chemical Industries, Ltd.) *4: ARISTOFLEX HMB (manufactured by Clariant Japan Co., Ltd.) [Industrial Applicability]

[0047] According to the present invention, it is possible to obtain a gel-type cosmetic that imparts a moist feeling, spreads well on the skin, is non-sticky, and does not cause the cosmetic to smudge.

Claims

1. (A) Sodium polyacrylate (B) Starch-sodium acrylate graft copolymer (C) Acryloyldimethyltaurate copolymer wherein the content of the component (A) is 0.5 to 2% by mass, the content of the component (B) is 0.1 to 0.5% by mass, and the content of the component (C) is 0.1 to 0.5% by mass.

2. 2. The gel cosmetic preparation according to claim 1, wherein the component (C) is at least one selected from the group consisting of ammonium acryloyldimethyltaurate / beheneth-25 methacrylate crosspolymer and ammonium acryloyldimethyltaurate / VP copolymer.

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