Composition for external application to skin

Abstract

To provide a skin care composition containing nicotinic acid amide and suppressing sticky feeling.SOLUTION: The skin care preparation composition comprises (A) nicotinic acid amide, (B) polyvinylpyrrolidone and (C) a granular water-absorbing polymer. Since the skin external preparation composition contains the component (A) to the component (C), it is possible to suppress a sticky feeling while imparting moisture to the skin and improving deep wrinkles, and further, it is possible to sufficiently feel freshness of the preparation, suppress a squeaky feeling, and provide a property of being less likely to drip down.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a skin external preparation composition. [Background technology]

[0002] Among various skin concerns, "deep wrinkles" that appear on the skin with age are one of the major concerns for women. There are "shallow wrinkles" that occur due to dryness and minor changes in the external environment, and "deep wrinkles" that occur due to changes in dermal components caused by factors such as photoaging or natural aging. The former are easy to improve with skin care such as moisturizing, but the latter are known to be difficult to improve without the use of appropriate beauty ingredients and skin care.

[0003] In particular, nicotinamide, a vitamin that is highly safe and known to have anti-aging effects for such deep wrinkles, is a known treatment for skin concerns (e.g., Patent Document 1). However, it is known that when nicotinamide is incorporated in large amounts, it can have undesirable textures, such as a strong stickiness, and efforts have been made to improve this. Examples include oil-in-water emulsion cosmetics using silicone oil and a polyoxyalkylene-added glycerin derivative (e.g., Patent Document 2), gel-type topical skin preparations using silicone oil, polyether-modified silicone, and carboxymethylcellulose (e.g., Patent Document 3), and leave-on skin care compositions using petrolatum (e.g., Patent Document 4). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3922311 [Patent Document 2] International Publication No. 2021 / 201136 [Patent Document 3] Patent No. 7256624 [Patent Document 4] Special Publication No. 2003-502435 Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned conventional topical skin preparations improve the sticky feeling caused by nicotinamide by using an oily agent, but methods for improving the sticky feeling without relying on an oily agent have not been fully investigated. In view of this background, there is a demand for topical skin preparation compositions containing nicotinamide that suppress the sticky feeling.

[0006] The present invention has been made in view of the above problems, and its object is to provide a topical skin composition containing nicotinamide that suppresses stickiness. [Means for solving the problem]

[0007] As a result of intensive research conducted by the inventors to achieve the above-mentioned object, they discovered that the effects of the present invention can be achieved by combining nicotinamide, polyvinylpyrrolidone, and a granular water-absorbing polymer, and further, they unexpectedly discovered that it is possible to provide a topical skin composition that gives a sufficient feeling of freshness to the formulation, is not squeaky, is resistant to dripping, and yet has good dispenser ejection properties, thereby completing the present invention.

[0008] The skin external preparation composition according to the present invention is characterized by containing the following components (A), (B) and (C): (A) Nicotinamide (B) Polyvinylpyrrolidone (C) Granular water-absorbing polymer

[0009] In the external skin preparation composition according to the present invention, the component (C) may be sodium acrylate-grafted starch or sodium carbomer.

[0010] In the external skin preparation composition according to the present invention, the component (C) may further have an average particle size of 50 μm or less when dried. [Effects of the Invention]

[0011] The external skin preparation composition according to the present invention can suppress the sticky feeling caused by nicotinamide. DETAILED DESCRIPTION OF THE INVENTION

[0012] The topical skin preparation composition according to this embodiment will be described in detail below, but the present invention is not limited to the following embodiment. The present invention is not limited to the individual components described below, and various modifications are possible within the scope of the claims. Embodiments and examples obtained by appropriately combining the technical means disclosed in different embodiments and examples are also included in the technical scope of the present invention. Furthermore, in this specification, unless otherwise specified, "A to B" representing a numerical range means "greater than or equal to A and less than or equal to B."

[0013] <External Skin Preparation Composition> The external skin preparation composition according to this embodiment contains (A) nicotinamide, (B) polyvinylpyrrolidone, and (C) a granular water-absorbing polymer.

[0014] <(A) Nicotinamide> The component (A) used in the topical skin preparation composition according to this embodiment is nicotinamide. Nicotinamide, also known as niacinamide, is a water-soluble vitamin that is a vitamin B3 derivative. Nicotinamide can be extracted from natural products such as rice bran or synthesized, so commercially available nicotinamide can be used in the topical skin preparation composition according to this embodiment. By using nicotinamide as component (A) in the topical skin preparation composition according to this embodiment, it is possible to moisturize the skin and improve deep wrinkles. Furthermore, by containing nicotinamide as component (A), (B) polyvinylpyrrolidone, and (C) a granular water-absorbing polymer, which will be described later, the topical skin preparation composition according to this embodiment can reduce stickiness.

[0015] In the topical skin preparation composition according to this embodiment, the content of component (A) is not particularly limited as long as it is within a range that can suppress stickiness by the combined use of components (B) and (C), but is preferably 0.1 to 10% by mass (hereinafter, unless otherwise specified, mass % is used) of the total topical skin preparation composition. When the content of component (A) is 0.1% by mass or more, the effects of moisturizing the skin and improving deep wrinkles are sufficiently exhibited. Furthermore, when the content of component (A) is 10% by mass or less, the stickiness during use can be sufficiently suppressed.

[0016] <(B) Polyvinylpyrrolidone> The component (B) used in the topical skin preparation composition according to this embodiment is polyvinylpyrrolidone. Polyvinylpyrrolidone is a general-purpose component generally known as a film-forming agent or hydrophilic thickener. Polyvinylpyrrolidone can be produced by synthesis from petroleum-derived components. Commercially available polyvinylpyrrolidone can be used in the topical skin preparation composition according to this embodiment.

[0017] In the external skin preparation composition according to this embodiment, the content of component (B) is preferably 0.3 mass % or less based on the total mass of the external skin preparation composition, from the viewpoint of usability.

[0018] <(C) Granular water-absorbent polymer> Component (C) used in the topical skin preparation composition according to this embodiment is a granular water-absorbent polymer. Granular water-absorbent polymers are polymers that are powdery when dry but can absorb large amounts of water. In the topical skin preparation composition according to this embodiment, the use of a granular water-absorbent polymer as component (C) not only alleviates the sticky feeling on the skin after application, but also imparts a smooth feeling to the skin. Polymer particles having a polyacrylate structure within the molecule are preferably used as the granular water-absorbent polymer. Examples include polyacrylates containing crosslinked or non-crosslinked sodium polyacrylate (e.g., Cosmetic Ingredient Name: Carbomer Na (INCI Name: Sodium Carbomer)), or polymers obtained by graft-polymerizing acrylic acid onto sugars such as starch (e.g., Cosmetic Ingredient Name: Acrylate Sodium Grafted Starch (INCI Name: Sodium Polyacrylate Starch)). One or more types of granular water-absorbent polymers may be blended as component (C) in the topical skin preparation composition according to this embodiment.

[0019] The granular water-absorbing polymer in the external skin preparation composition according to this embodiment may be a commercially available product. Examples of carbomer Na include AQUAKEEP (manufactured by Sumitomo Seika Chemicals Co., Ltd.) and AQUPEC MG N40R (manufactured by Sumitomo Seika Chemicals Co., Ltd.), and examples of sodium acrylate grafted starch include MAKIMOUSSE 12 (average particle size: about 12 μm) (manufactured by Daito Chemical Industry Co., Ltd.), MAKIMOUSSE 25 (average particle size: about 25 μm) (manufactured by Daito Chemical Industry Co., Ltd.), SALANDULE ST-100SP (average particle size: about 12 μm) (manufactured by Sanyo Chemical Industry Co., Ltd.), and SALANDULE ST-100MC (average particle size: about 30 μm) (manufactured by Sanyo Chemical Industry Co., Ltd.), and these are preferably used in the external skin preparation composition according to this embodiment. The particle size of the granular water-absorbing polymer, which is component (C) in the topical skin preparation composition of this embodiment, when dried is not particularly limited. However, when the topical skin preparation composition is used by ejecting it from a dispenser, the particle size when dried is preferably 50 μm or less, from the viewpoint of improving ejection properties.

[0020] In the topical skin preparation composition of this embodiment, the amount of component (C) to be blended is not particularly limited, but from the viewpoint of preventing makeup from smudging on the skin during use and preventing the formation of crumbly residue, it is preferably 0.1 to 5 mass %, more preferably 0.1 to 2 mass %, of the total topical skin preparation composition.

[0021] The topical skin preparation composition according to this embodiment contains (A) nicotinamide, (B) polyvinylpyrrolidone, and (C) a granular water-absorbing polymer, and thus can moisturize the skin, improve deep wrinkles, and suppress stickiness.

[0022] Furthermore, by containing the above-mentioned components (A) to (C), the topical skin preparation composition according to this embodiment can provide a sufficient feeling of freshness to the preparation, without any squeaky feeling, and with less dripping properties, in addition to the above-mentioned effects. Furthermore, by setting the average particle size of the granular water-absorbing polymer (component (C)) when dried to 30 μm or less, the dischargeability of the topical skin preparation composition according to this embodiment can be synergistically improved when it is discharged from a dispenser for use.

[0023] <Other ingredients> In addition to the above-mentioned components, the skin external preparation composition according to this embodiment may contain other components, such as anionic surfactants, cationic surfactants, amphoteric surfactants, etc., within the scope of the object of the present invention. Ingredients such as surfactants, nonionic surfactants, oils, polymeric compounds, thickeners, powders (dyes, resins, pigments), preservatives, fragrances, moisturizers, physiologically active ingredients, mineral salts, solvents, antioxidants, chelating agents, pearlizing agents, neutralizing agents, pH adjusters, plant extracts, enzymes, vitamins, and amino acids can be blended as appropriate.

[0024] Furthermore, the topical skin preparation composition according to this embodiment can contain an appropriate physiologically active ingredient within the scope of the present invention. A physiologically active substance is a substance that imparts some physiological activity to the skin when applied to the skin, and examples thereof include whitening agents, anti-inflammatory agents, anti-aging agents, UV protection agents, astringents, antioxidants, blood circulation promoters, antibacterial agents, disinfectants, cooling agents, warming agents, wound healing promoters, irritation soothing agents, analgesics, and cell activators.

[0025] The topical skin preparation composition according to this embodiment can be used in the form of general cosmetics, quasi-drugs, or pharmaceuticals. Its form is not particularly limited, and it may be liquid, gel, or solid. Furthermore, the form of the cosmetic is not particularly limited, and it can be used in basic cosmetics such as lotions, emulsions, creams, sunscreens, packs, massage products, serums, cleansing products, and detergents, makeup cosmetics such as foundations, face powders, and concealers, hair cosmetics, body cosmetics, bath additives, and the like. [Example]

[0026] The present invention will now be described in detail with reference to examples, but is not limited thereto. Prior to the examples, the test and evaluation methods employed in each example will be described.

[0027] (Freshness evaluation test for formulations) A sensory evaluation was carried out by five expert panelists on the freshness of the skin cosmetics of the examples of the present invention and the comparative examples when applied to the entire face, using the following rating system. The evaluation criteria were based on the average of the five ratings and categorized as follows: 5 points: The formulation feels fresh and moist 4 points: The formulation feels slightly fresh 3 points: The formulation feels slightly fresh. 2 points: The formulation does not feel very fresh. 1 point: The formulation does not feel fresh at all

[0028] (Test to evaluate non-stickiness of skin) A sensory evaluation was carried out by five expert panelists on the non-stickiness of the skin immediately after application of the skin cosmetics of the Examples and Comparative Examples of the present invention, using the following rating system. The evaluation criteria were based on the average of the five ratings and categorized as follows: 5 points: No stickiness felt immediately after application 4 points: Almost no stickiness felt immediately after application 3 points: Not very sticky immediately after application 2 points: Feels slightly sticky immediately after application 1 point: Sticky feeling immediately after application

[0029] (Skin creaking resistance evaluation test) A sensory evaluation was carried out by five expert panelists on the absence of skin creaking immediately after application of the skin cosmetics of the Examples and Comparative Examples of the present invention, using the following rating system. The evaluation criteria were based on the average of the five ratings and categorized as follows: 5 points: No creaking sensation immediately after application 4 points: Almost no creaking sensation immediately after application 3 points: No noticeable creaking immediately after application 2 points: Slight creaking sensation immediately after application 1 point: Feels squeaky immediately after application

[0030] (Test to evaluate the absence of dripping of the formulation and the dispenser discharge performance) A panel of five experts evaluated the usability of the skin cosmetics of the examples of the present invention and the comparative examples by assessing the lack of dripping of the preparations and the ease of dispensing them from the dispenser. They squeezed the dispenser container twice to take the preparation onto the inside of the forearm, and evaluated the state of dripping using the following rating system. The evaluation criteria were based on the average of the ratings of the five experts and were classified as follows: (Evaluation criteria for non-dripping of formulation) 5 points: No dripping of the formulation is felt during use 4 points: Almost no dripping of the formulation is felt during use 3 points: There is little dripping of the formulation during use 2 points: Some dripping of the formulation is felt during use 1 point: Dripping of the formulation is felt when using (Dispenser discharge performance evaluation criteria) 〇: Able to be dispensed sufficiently with a dispenser △...Can be dispensed with a dispenser ×...Cannot be dispensed by dispenser

[0031] <Examples 1 to 15 and Comparative Examples 1 and 2> Tables 1 and 2 show the results of skin external preparation compositions according to the formulations of Examples 1 to 15 and Comparative Examples 1 and 2, which were prepared by conventional methods and evaluated by the respective test methods.

[0032] [Table 1]

[0033] [Table 2]

[0034] As is clear from Tables 1 and 2, all of the topical compositions of the Examples using the components of the present invention had excellent performance. On the other hand, the Comparative Examples lacking any of the essential components showed poor effects in any of the evaluation items, and the object of the present invention could not be achieved.

[0035] Other formulation examples of the topical composition of the present invention are given below as examples. The topical compositions of these examples were also examined for each of the above-mentioned odor suppression effects, and were found to have excellent properties in all respects.

[0036] Example 16 (1) Nicotinamide 3.0% (2) Polyvinylpyrrolidone 0.2% (3) Sodium acrylate grafted starch 0.6% (4) Hydrolyzed collagen 0.01% (5) Arginine 0.01% (6) Rice fermentation liquid 0.1% (7) Cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol 0.05% (8) Glycerin 5.0% (9) 1,3-butylene glycol 10.0% (10) Dipropylene glycol 5.0% (11) EDTA-2Na 0.01% (12) Alkyl-modified carboxyvinyl polymer 0.1% (13) Caprylic / Capric Triglyceride 0.1% (14) Dimethicone 0.05% (15) PEG-60 Hydrogenated Castor Oil 0.1% (16) Polysorbate 20 0.1% (17) Phenoxyethanol 0.4% (18) Methylparaben 0.05% (19) Purified water Rest

[0037] (Manufacturing method) Components (1), (2), (4) to (11), and (17) to (19) were uniformly dissolved (Solution A). Components (13) to (16) were uniformly dispersed and added to Solution A, after which components (3) and (12) were further added and dispersed in a homomixer until uniform, to prepare a beauty serum.

[0038] Example 17 (1) Nicotinamide 1.0% (2) Polyvinylpyrrolidone 0.1% (3) Sodium acrylate 0.4% (4) Hydrogenated soybean phospholipid 1.0% (5) Methylphenylpolysiloxane 0.5% (6) Cholesterol 0.2% (7) Ascorbic acid 2-glucoside 0.05% (8) Polyethylene glycol (molecular weight 4000) 1.0% (9) Glucosylceramide 0.01% (10) Carboxyvinyl polymer 0.05% (11) Glycerin 3.0% (12) 1,3-butylene glycol 5.0% (13) Dipropylene glycol 8.0% (14) Sorbitol 2.0% (15) Potassium hydroxide 0.03% (16) Disodium edetate 0.01% (17) 1,2-hexanediol 3.0% (18) Purified water remainder

[0039] (Manufacturing method) (4) to (6) were uniformly dissolved at 80°C, and (1) to (3) and (7) to (18) were uniformly dispersed at 80°C. The mixture was added to the solution, dispersed using a homomixer, and then cooled to prepare a cosmetic liquid.

[0040] Example 18 (1) Nicotinamide 10.0% (2) Polyvinylpyrrolidone 0.3% (3) Sodium acrylate grafted starch 1.0% (4) Dipotassium glycyrrhizinate 0.05% (5) Rice fermentation liquid 0.1% (6) Yuzu Fruit Extract 0.01% (7) Job's Tears Seed Extract 0.05% (8) Trimethylglycine 0.5% (9) Glutathione 0.1% (10) 1,3-butylene glycol 10.0% (11) Inositol 1.0% (12) Maltitol 1.0% (13) HEDTA-3Na 0.01% (14) Citric acid 0.01% (15) Sodium dilauroyl glutamate lysine 0.1% (16) POE(60) Hydrogenated Castor Oil 0.1% (17) Purified water remainder

[0041] (Manufacturing method) (1) to (17) were dispersed in a homomixer until uniform, to prepare a gel beauty serum.

Claims

1. A skin external preparation composition comprising the following components (A), (B) and (C): (A) Nicotinamide (B) Polyvinylpyrrolidone (C) Granular water-absorbing polymer

2. 2. The external skin preparation composition according to claim 1, wherein component (C) is sodium acrylate-grafted starch or sodium carbomer.

3. The external skin preparation composition according to claim 1 or 2, wherein the average particle size of component (C) when dried is 50 μm or less.

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