Skin cosmetics

Abstract

To provide a skin cosmetic that imparts moist feeling, softness and tension of skin, has no stickiness, and also has satisfactory compatibility and spreading onto the skin.SOLUTION: A skin cosmetic containing (A) shea butter, (B) shea butter extract, (C) dipotassium glycyrrhizinate, and (D) one or more selected from carboxyvinyl polymers and acrylic acid-methacrylic acid alkyl copolymers imparts moist feeling, softness and tension of skin, where the cosmetic has no stickiness and also has satisfactory compatibility and spreading onto skin.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a skin cosmetic, and more particularly to a skin cosmetic that imparts a moist feeling, softness and firmness to the skin, is non-sticky, and has good affinity and spreadability to the skin. [Background technology]

[0002] Skin cosmetics have traditionally been used to moisturize the skin and prevent dryness. Polyhydric alcohols, amino acids, and vegetable oils have been used as ingredients to moisturize the skin and prevent dryness. Among these ingredients, shea butter has recently attracted attention from consumers due to its image and efficacy as an ingredient.

[0003] Shea fat, also known as shea butter, is a vegetable fat obtained from the fruit of the shea tree (Butyrospermum Parkii).

[0004] Shea butter is used in skin cosmetics to impart moisturizing, softness, and firmness to the skin. However, if the amount added is too high, it may not blend well with the skin, spread poorly, and may cause stickiness and other problems related to the feel when used.

[0005] Patent Document 1 discloses that an O / W emulsion characterized by blending an oily component containing shea butter, a polyhydric alcohol having two hydroxyl groups in the molecule, a polyhydric alcohol having three or more hydroxyl groups in the molecule, one or more water-soluble polymers selected from phospholipids, carboxyvinyl polymers, and xanthan gum, and an aqueous component containing water improves moisturizing, softness, stickiness, and firmness of the skin.

[0006] Patent Document 2 discloses that a skin cream containing an oil agent that is liquid at 25°C and is selected from shea butter, dimer acid ester, polyethylene glycol distearate having an average number of moles of oxyethylene groups added of 200 to 300, wax, silicone oil, polyhydric alcohol, hydrocarbon oil, and ester oil other than dimer acid ester, improves moist feeling, skin softness, stickiness, and spreadability. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-44179 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-216401 Summary of the Invention [Problem to be solved by the invention]

[0008] However, Patent Document 1 does not examine the compatibility and spreadability of the blended shea butter with the skin. In addition, although the non-stickiness can be further improved by reducing the blended amount of shea butter, there is a tendency for the moist feeling, softness, and firmness of the skin to deteriorate, so there is room for further investigation.

[0009] Patent Document 2 does not examine the firmness and skin compatibility of the blended shea butter. In addition, there is room for further investigation, as reducing the blended amount of shea butter tends to reduce the moist feeling.

[0010] Therefore, an object of the present invention is to provide a skin cosmetic that imparts a moist feeling, softness and firmness to the skin, is not sticky, and has good affinity and spreadability on the skin. [Means for solving the problem]

[0011] As a result of extensive research, the present inventors have found that a skin cosmetic containing one or more selected from (A) shea butter, (B) shea butter extract, (C) dipotassium glycyrrhizinate, and (D) carboxyvinyl polymer and acrylic acid / alkyl methacrylate copolymer can impart a moist feeling, softness and firmness to the skin, is not sticky, and has good compatibility and spreadability on the skin, and have completed the present invention. [Effects of the Invention]

[0012] The present invention provides a skin cosmetic that imparts moist feeling, softness and firmness to the skin, is non-sticky, and has good affinity and spreadability to the skin. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described in detail below. Note that the units indicating the contents are all % by mass unless otherwise specified.

[0014] The present invention contains (A) shea butter from the viewpoints of moist feeling, firmness, and compatibility with the skin.

[0015] The component (A) used in the present invention is fat obtained from the fruit of the shea butter tree (Butyrospermum Parkii).

[0016] The content of the component (A) used in the present invention is not particularly limited, but is preferably 0.01 to 5%, more preferably 0.05 to 3%, and even more preferably 0.1 to 1%. If the component (A) is less than 0.01%, the moist feeling and firmness may not be obtained, and the skin may not blend well. If the component (A) is more than 5%, the skin may become sticky and the skin may not blend well.

[0017] The present invention contains (B) shea butter extract from the viewpoint of softening and firming the skin.

[0018] The component (B) used in the present invention is an extract of fat obtained from the fruit of the shea butter tree (Butyrospermum Parkii).

[0019] The content of the (B) component used in the present invention is not particularly limited, but is preferably 0.001 to 0.5%, more preferably 0.003 to 0.1%, and even more preferably 0.005 to 0.05%. If the (B) component is less than 0.001%, the skin may not be soft and firm. If the (B) component is more than 0.5%, the skin may become sticky and may not blend well or spread well.

[0020] The present invention contains (C) dipotassium glycyrrhizinate from the viewpoint of moist feeling and softness of the skin.

[0021] The content of the component (C) used in the present invention is not particularly limited, but is preferably 0.001 to 0.5%, more preferably 0.003 to 0.1%, and even more preferably 0.005 to 0.05%. If the component (C) is less than 0.001%, moisturizing and soft skin may not be achieved. If the component (C) is more than 0.5%, stickiness may occur.

[0022] From the viewpoint of compatibility with the skin and good spreadability, the present invention contains (D) one or more members selected from carboxyvinyl polymers and acrylic acid / alkyl methacrylate copolymers.

[0023] The acrylic acid / alkyl methacrylate copolymer of component (D) used in the present invention is not particularly limited, but examples thereof include (acrylates / alkyl acrylate (C10-30)) crosspolymers.

[0024] The content of the (D) component used in the present invention is not particularly limited, but is preferably 0.005 to 1.5%, more preferably 0.01 to 1%, and even more preferably 0.05 to 0.5%. If the (D) component is less than 0.005%, the skin may become less absorbent and spreadable. If the (D) component is more than 1.5%, the skin may become sticky and the skin may become less absorbent and spreadable.

[0025] From the viewpoint of usability, the viscosity of the skin cosmetic of the present invention is preferably 10,000 mPa·s or more at 20°C.

[0026] The viscosity of the skin cosmetic of the present invention at 20°C was measured by filling 120g of the skin cosmetic prepared by conventional methods into a 140g 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 using a B-type viscometer with a helical stand (model: digital viscometer TVB-10M, manufactured by Toki Sangyo Co., Ltd.) with a No. 4 rotor for one minute at a rotation speed of 6 rpm.

[0027] The pH of the skin cosmetic of the present invention is preferably 4 to 9 at 20°C from the viewpoint of emulsion stability.

[0028] The pH of the skin 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 the skin cosmetic preparation prepared by a conventional method was left to stand at 20°C for one day and the temperature was adjusted.

[0029] In addition to the essential ingredients, the skin cosmetic of the present invention may contain at least one selected from various ingredients used in ordinary cosmetics, quasi-drugs, pharmaceuticals, etc., such as surfactants, oily ingredients other than component (A), moisturizers, polymers other than component (D), chelating agents, protein derivatives, hydrolyzed proteins, stabilizers, antioxidants, plant extracts other than component (B), vitamins, preservatives, coloring matter, pigments, powders, ultraviolet absorbers, fragrances, etc., within a range that does not impair the effects, but is not limited to these examples. [Example]

[0030] 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.

[0031] In the evaluation tests described herein, the components contained in the skin cosmetics and their contents were varied. The units used to indicate the contents of each component are % by mass, and the skin cosmetics were prepared using conventional methods.

[0032] In the evaluation test methods shown in this specification, "moist feeling," "skin softness," "firmness," "non-stickiness," "compatibility with skin," and "ease of spreading" were evaluated using the following methods.

[0033] "Moisturizing" The moisturizing sensation of the skin cosmetics obtained in the Examples and Comparative Examples was evaluated by a panel of 15 experts. The evaluation test consisted of applying 0.5 g of the skin cosmetics of the Examples and Comparative Examples, which had been adjusted to 20°C, evenly to the entire hand at room temperature of 20°C and humidity of 60%, and the moisturizing sensation was evaluated by sensory evaluation. <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.

[0034] "Softness of the skin" The skin softness of the skin cosmetics obtained in the Examples and Comparative Examples was evaluated by a panel of 15 experts. The evaluation test consisted of applying 0.5 g of the skin cosmetics of the Examples and Comparative Examples, which had been adjusted to 20°C, evenly to the entire hand at room temperature of 20°C and humidity of 60%, and the skin softness was evaluated by sensory evaluation. <Evaluation criteria> 5: More than 13 out of 15 people felt that their skin was softer. 4: Between 10 and 12 out of 15 people felt that their skin was soft. 3: Between 7 and 9 out of 15 people felt that their skin was soft. 2: Between 4 and 6 out of 15 people felt that their skin was soft. 1: Fewer than 3 out of 15 people felt that their skin was softer.

[0035] "Hari" A panel of 15 experts evaluated the firmness of the skin cosmetics obtained in the Examples and Comparative Examples. The evaluation test consisted of applying 0.5 g of the skin cosmetics of the Examples and Comparative Examples, which had been adjusted to 20°C, evenly to the entire surface of the hands at room temperature of 20°C and humidity of 60%, and evaluating the firmness of the skin by sensory evaluation. <Evaluation criteria> 5: More than 13 out of 15 people felt that their skin was firm. 4: Out of 15 people, between 10 and 12 felt that their skin was firm. 3: Between 7 and 9 out of 15 people felt that their skin was firm. 2: Out of 15 people, between 4 and 6 felt that their skin was firm. 1: Fewer than 3 out of 15 people felt that their skin was firm.

[0036] "Non-sticky" The skin cosmetics obtained in the Examples and Comparative Examples were evaluated by a panel of 15 experts for their non-stickiness. The evaluation test consisted of applying 0.5 g of the skin cosmetics of the Examples and Comparative Examples, which had been adjusted to 20°C, evenly to the entire surface of the hands at room temperature of 20°C and humidity of 60%, and evaluating whether or not the skin felt sticky by sensory evaluation. <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.

[0037] "Skin compatibility" A panel of 15 experts evaluated the compatibility of the skin cosmetics obtained in the Examples and Comparative Examples with the skin. In the evaluation test, 0.5 g of the skin cosmetics of the Examples and Comparative Examples, which had been adjusted to 20°C, was applied evenly to the entire hand at room temperature of 20°C and humidity of 60%, and the skin compatibility upon application was evaluated by sensory evaluation. <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] "Good stretch" A panel of 15 experts evaluated the spreadability of the skin cosmetics obtained in the Examples and Comparative Examples. In the evaluation test, 0.5 g of the skin cosmetics of the Examples and Comparative Examples, which had been adjusted to 20°C, was applied evenly to the entire hand at room temperature of 20°C and humidity of 60%, and the ease of spreadability upon application was evaluated by sensory evaluation. <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.

[0039] [Table 1]

[0040] [Table 2]

[0041] [Table 3]

[0042] [Table 4]

[0043] Examples 1 to 26 shown in Tables 1 to 4 showed good results in terms of moist feeling, softness of the skin, firmness, non-stickiness, compatibility with the skin, and spreadability.

[0044] Example 27 of the skin cosmetic is described below.

[0045] The skin cosmetic obtained in Example 27 gave good results in terms of moist feeling, softness of the skin, firmness, non-stickiness, compatibility with the skin, and spreadability.

[0046] Example 27 Component Content (mass%) (A) Shea butter 0.50 (B) Shea butter extract 0.01 (C) Dipotassium glycyrrhizinate 0.01 (D) Carboxyvinyl polymer 0.15 Caprylic / Capric Triglyceride 3.00 Octyldodecyl myristate 3.00 Stearyl stearate 1.50 Cetyl alcohol 2.20 Stearyl alcohol 2.20 Stearic acid 0.90 Methylphenylpolysiloxane 0.60 Methylpolysiloxane 0.75 Sorbitan monostearate 1.10 Self-emulsifying glyceryl monostearate 0.90 Polyoxyethylene sorbitan monostearate 2.10 Propyl parahydroxybenzoate 0.10 Vaseline 2.00 Olive oil 0.01 Peppermint oil 0.01 Orange oil 0.01 Shea Butter Ethyl Esters 0.01 Disodium edetate 0.04 Concentrated glycerin 3.00 1,3-butylene glycol 7.00 Methyl parahydroxybenzoate 0.30 Potassium hydroxide 0.08 Fragrance 1.00 Yellow 4 0.01 Red 106 0.01 Arnica extract 0.01 Cucumber Extract (1) 0.01 English: ... Elderberry extract 0.01 Mallow extract 0.01 Parietaria extract 0.01 Cowberry juice 0.01 Sage Leaf Extract 0.01 Strawberry Seed Extract 0.01 Apple extract 0.01 Licorice leaf extract 0.01 Purified water 67.39 Total 100.00 [Industrial Applicability]

[0047] According to the present invention, it is possible to obtain a skin cosmetic that imparts a moist feeling, softness and firmness to the skin, is not sticky, and has good compatibility and spreadability on the skin.

Claims

[Claim 1] (A) Shea butter (B) Shea butter extract (C) Dipotassium glycyrrhizinate (D) one or more selected from carboxyvinyl polymers and acrylic acid / alkyl methacrylate copolymers wherein the content of the component (A) is 0.1 to 1% by mass, the content of the component (B) is 0.005 to 0.05% by mass, the content of the component (C) is 0.005 to 0.05% by mass, and the content of the component (D) is 0.05 to 0.5% by mass.

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