cosmetics

Abstract

To provide a cosmetic which is less sticky after application and gives an excellent moist feeling to the skin after application. SOLUTION: A cosmetic comprising (A) nicotinamide, (B) polyoxyalkylenedialkyl dimer diol ether, and (C) water.

Description

[Technical Field]

[0001] The present invention relates to a cosmetic preparation containing nicotinamide and a polyoxyalkylenedialkyl dimer diol ether. More specifically, the present invention relates to a cosmetic preparation that maintains the physiological activity of nicotinamide, while providing excellent freshness during application, non-stickiness on the skin after application, and a moist feeling after application, resulting in a pleasant feel in use. [Background technology]

[0002] Basic functions of skin care cosmetics include anti-drying, UV protection, antioxidant properties, and activation properties. Some skin care cosmetics with these basic functions are said to be effective for whitening and anti-aging by improving wrinkles and sagging, preventing rough skin, etc. Vitamins capable of exerting such effects are necessary for maintaining normal functions throughout the body and are also important for maintaining the physiological functions of the skin. In particular, B vitamins such as nicotinamide are known to be effective against seborrheic dermatitis and eczema and to have skin cell activation properties. However, it has been known that the inclusion of nicotinamide in cosmetics can result in undesirable sensations after use, such as a loss of moisture and excessive stickiness on the skin after use (Patent Document 1).

[0003] Studies have been conducted to improve the feel of nicotinamide in use, such as stickiness, while maintaining its usefulness. For example, selection of the type of surfactant has been considered. However, for example, if the surfactant is limited, its appearance and properties may be affected, and the transparency of the cosmetic may be reduced. Transparency is sometimes important for skin care cosmetics such as lotions and serums. Therefore, there is a need for a technology that maintains or improves usability, transparency, etc., while maintaining the usefulness of nicotinamide. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021-215423 Summary of the Invention

[0005] According to the present invention, the following inventions are provided. [1] (A) nicotinamide, (B) a polyoxyalkylene dialkyl dimer diol ether, and (C)Water A cosmetic comprising: [2] The cosmetic according to [1], wherein the content of component (C) is 70 to 90 mass % based on the total mass of the cosmetic. [3] The cosmetic preparation according to [1] or [2], wherein component (B) is PEG / polybutylene glycol-44 / 15 methyl ether hydrogenated dimer dilinoleyl. [4] The cosmetic according to any one of [1] to [3], wherein the content of component (A) is 2 to 12 mass % based on the total mass of the cosmetic. [5] The cosmetic according to any one of [1] to [4], wherein the content of component (B) is 0.01 to 1 mass % based on the total mass of the cosmetic. [6] The cosmetic preparation according to any one of [1] to [5], wherein the mass-based content ratio A / B of the component (A) to the component (B) is 10 to 50. [7] (D) The cosmetic preparation according to any one of [1] to [6], further comprising a polyhydric alcohol.

[0006] According to the present invention, a cosmetic product is provided that can provide physiological activity based on nicotinamide and at the same time has an excellent feel when used. In particular, with regard to the feel when used, the cosmetic product according to the present invention has little stickiness after application and provides an excellent moist feeling on the skin after application. Furthermore, since the stickiness after application caused by the incorporation of nicotinamide can be suppressed, the content of nicotinamide can be relatively increased, making it possible to obtain more physiological activity based on nicotinamide. Specific Description of the Invention

[0007] The cosmetic composition according to the present invention comprises: (A) nicotinamide, (B) a polyoxyalkylene dialkyl dimer diol ether, and (C)Water Each of these components, as well as other components that may be added, will be described below.

[0008] (A) Nicotinamide Nicotinamide (A) (hereinafter sometimes referred to as component (A)) blended in the cosmetic preparation according to the present invention is an amide compound of nicotinic acid (also known as vitamin B3 or niacin). Nicotinamide is a water-soluble vitamin and is a widely known substance as one of the B vitamins. It can be obtained by extraction from natural products such as rice bran or by synthesis using known methods.

[0009] The content of component (A) in the cosmetic of the present invention is not particularly limited, but is preferably 2 to 12 mass %, more preferably 3 to 10 mass %, and even more preferably 3 to 8 mass %, based on the total mass of the cosmetic. If it is incorporated within the above range, it will be effective in improving rough skin, whitening, and preventing skin aging, due to the skin cell activation effect and epidermal cell ceramide synthesis promotion effect of nicotinamide.

[0010] (B) Polyoxyalkylene dialkyl dimer diol ether The cosmetic preparation according to the present invention comprises (B) a polyoxyalkylenedialkyl dimer diol ether (hereinafter sometimes referred to as component (B)). Polyoxyalkylenedialkyl dimer diol ethers are known as hydrophilic surfactants, but in the present invention, nicotinic acid amide is used to provide the effect of suppressing stickiness after application. According to the inventors' investigations, this effect cannot be obtained with surfactants other than the polyoxyalkylenedialkyl dimer diol ether used in the present invention.

[0011] The component (B) is preferably represented by the following formula: Z-{O-[(AO) a -(EO) b ]-R}2 During the ceremony, Z is a residue obtained by removing a hydroxyl group from a dimer diol, and is preferably a dimer diol residue having 24 to 48 carbon atoms. AO is an oxyalkylene group having 3 or 4 carbon atoms, preferably an oxypropylene group or an oxybutylene group, and more preferably an oxybutylene group; The addition form of the oxyalkylene group having 3 or 4 carbon atoms and the oxyethylene group is a block, and the addition order is preferably an AO block followed by an EO block to the dimer diol. a and b are the average number of moles of oxyalkylene groups and oxyethylene groups added, respectively, and are 1≦(total of two a's)≦150 and 1≦(total of two b's)≦150, preferably 2≦(total of two a's)≦70 and 5≦(total of two b's)≦120, and more preferably 2≦(total of two a's)≦50 and 10≦(total of two b's)≦100. The proportion of oxyethylene groups to the total of oxyalkylene groups and oxyethylene groups is 10 to 99% by mass, and preferably 20 to 70% by mass. Each R is independently a hydrocarbon group having 1 to 4 carbon atoms, and is preferably a methyl group or an ethyl group.

[0012] Component (B) is preferably polyoxyethylene polyoxybutylene dimethyl dimer diol ether, and more preferably PEG / polybutylene glycol-44 / 15 methyl ether hydrogenated dimer dilinoleyl.

[0013] One or more types of component (B) can be blended in. The content of component (B) in the cosmetic of the present invention is not particularly limited, but is preferably 0.01 to 1 mass %, more preferably 0.05 to 0.8 mass %, and even more preferably 0.1 to 0.6 mass %, based on the total mass of the cosmetic.

[0014] In the cosmetic composition according to the present invention, it is preferable that the ratio of the content of component (A) to the content of component (B) is within an appropriate range, since the effects of the present invention are more pronounced. Specifically, the mass-based content ratio A / B of the content of component (A) to the content of component (B) is preferably 10 to 50, and more preferably 15 to 40.

[0015] (C)Water In addition to the above-mentioned components, the cosmetic preparation according to the present invention further contains water (hereinafter sometimes referred to as component (C)). As the water, water used in cosmetics, quasi-drugs, etc. can be used, such as purified water, ion-exchanged water, tap water, etc.

[0016] The content of component (C) is not particularly limited, but is preferably 70 to 90 mass%, and more preferably 75 to 85 mass%, based on the total mass of the cosmetic. The cosmetic may contain oil as an optional ingredient, but is preferably an aqueous cosmetic with a low oil content.

[0017] (D) Polyhydric alcohol In addition to the above-described components (A) to (C), the cosmetic preparation of the present invention may contain optional ingredients commonly used in cosmetics and pharmaceuticals. A representative example of such optional ingredients is (D) a polyhydric alcohol. Moisture retention is sometimes required in cosmetics, and polyhydric alcohols function as moisturizers when incorporated into cosmetics. Examples of such polyhydric alcohols include ethylene glycol, diethylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, hexamethylene glycol, isoprene glycol, polyethylene glycol, hyaluronic acid, xylitol, sorbitol, maltitol, and diglycerin (EO)PO adduct. Two or more types of polyhydric alcohols may also be used in combination. When the cosmetic preparation of the present invention contains a polyhydric alcohol, the content thereof is preferably 5 to 30% by mass, more preferably 10 to 20% by mass, based on the total mass of the cosmetic preparation.

[0018] The cosmetic preparation according to the present invention may contain optional components other than component (D) to the extent that the effects of the present invention are not impaired. Examples of other optional components include surfactants other than component (B), hydrophilic solvents, water-soluble polymers, oils, UV absorbers, drugs, chelating agents, preservatives, antioxidants, powders, fragrances, coloring agents, pigments, etc., which can be blended as appropriate depending on the form and application of the cosmetic preparation.

[0019] The cosmetic according to the present invention can be, for example, a skin care cosmetic (e.g., lotion, serum, pack, etc.), a skin cleanser (e.g., facial cleanser, makeup remover, etc.), etc. Note that these forms are merely examples, and the cosmetic according to the present invention is not limited to these forms. Furthermore, the cosmetic according to the present invention is preferably a skin care cosmetic that provides the physiological activity of nicotinamide, and in such cases, the cosmetic is preferably highly transparent.

[0020] The formulation of the cosmetic according to the present invention is not particularly limited, but is preferably in the form of an aqueous cosmetic or an oil-in-water emulsion cosmetic. In an aqueous cosmetic or an oil-in-water emulsion cosmetic, the aqueous phase comes into contact with the skin first, providing a fresh feeling to the skin and making it possible to more effectively experience the effects of the present invention. Furthermore, when the cosmetic according to the present invention is an aqueous cosmetic, it is also possible to obtain a refreshing feeling.

[0021] The method for producing the cosmetic of the present invention is not particularly limited, and it can be produced according to a conventional method. [Example]

[0022] The present invention will be described in detail based on the following examples, but the present invention is not limited to these examples. Contents are expressed in mass % based on the total mass unless otherwise specified.

[0023] [Examples 1 to 33, Comparative Examples 1 to 55] Cosmetics for each example and comparative example were prepared according to the formulation shown in Table 1. In addition, in comparison with component (B), which is essential to the present invention, PPG-13 decyltetradeceth-24, a polyoxyethylene polyoxypropylene alkyl ether, was used as a hydrophilic surfactant in the comparative examples.

[0024] Furthermore, the performance of these cosmetics was evaluated as follows.

[0025] [Moisturizing feeling after application] The prepared cosmetic preparations were applied to the skin by a panel of 10 experts, and evaluated according to the following criteria, depending on the number of people who evaluated the effectiveness as being greater than that of the control (Comparative Example 1). 3: Compared to the control, more than 7 out of 10 people felt a moist feeling after application. 2: Compared to the control, 4 to 6 out of 10 people felt a moist feeling after application. 1: Compared to the control, 1 to 3 out of 10 people felt a moist feeling after application. 0: Compared to the control, 0 out of 10 people felt a moist feeling after application.

[0026] [Stickiness after application] The prepared cosmetic preparations were applied to the skin by a panel of 10 experts, and evaluated according to the following criteria, depending on the number of people who evaluated the effectiveness as being greater than that of the control (Comparative Example 1). 3: Compared to the control, more than 7 out of 10 people felt sticky after application. 2: Compared to the control, 4 to 6 out of 10 people felt sticky after application. 1: Compared to the control, 1 to 3 out of 10 people felt sticky after application. 0: Compared to the control, 0 out of 10 people felt sticky after application.

[0027] The results obtained are shown in Table 1. [Table 1]

Claims

1. (A) Nicotinamide, (B) a polyoxyalkylene dialkyl dimer diol ether, and (C) Water Cosmetics containing the following ingredients.

2. 2. The cosmetic according to claim 1, wherein the content of component (C) is 70 to 90% by mass, based on the total mass of the cosmetic.

3. The cosmetic composition according to claim 1 or 2, wherein component (B) is PEG / polybutylene glycol-44 / 15 methyl ether hydrogenated dimer dilinoleyl.

4. The cosmetic composition according to claim 1 or 2, wherein the content of component (A), based on the total mass of the cosmetic composition, is 2 to 12% by mass, based on the total mass of the cosmetic composition.

5. The cosmetic composition according to claim 1 or 2, wherein the content of component (B), based on the total mass of the cosmetic composition, is 0.01 to 1% by mass, based on the total mass of the cosmetic composition.

6. 3. The cosmetic preparation according to claim 1, wherein the mass-based content ratio A / B of the component (A) to the component (B) is 10 to 50.

7. The cosmetic preparation according to claim 1 or 2, further comprising (D) a polyhydric alcohol.

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