Gel shaving composition

Abstract

To provide a shaving gel composition which enables excellent thorough shaving, excellent rinsing and moistness after use, and can impart firmness.SOLUTION: The shaving gel composition contains the (A), (B), (C) and (D) components in the following: (A) 0.1 mass% to 10 mass% of a water-soluble alkylene oxide derivative represented by the formula (1), Z-[O(PO)m(EO)n-(BO)pH]a; (B) 10 mass% to 50 mass% of a polyhydric, i.e., tri- to hexahydric, alcohol; (C) 0.1 mass% to 2 mass% of a polyacrylic acid based water-soluble polymer; and (D) 0.01 mass% to 2 mass% of a polyethylene glycol having a number-average molecular weight from 10 thousand to 2 million inclusive. (In the formula (1), Z is a residue obtained by removing all the hydroxy groups from a compound having 2-4 hydroxy groups; a is from 2 to 4; PO is an oxypropylene group, EO is an oxyethylene group, and BO is a C4 oxyalkylene group; and m, n and p are respectively average numbers of moles of PO, EO and BO added per hydroxy group, where m and n are each from 0 to 15, and p is from 0 to 5, provided that m, n and p are not simultaneously equal to 0.)SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a gel shaving composition. [Background technology]

[0002] When shaving beard or body hair with a razor, shaving cream is generally used to protect the skin from the blade. The basic performance required of a shaving cream is its smoothness, which allows for a smooth shave, and its rinsability, which allows for easy rinsing of any shaving cream remaining on the skin and razor after shaving.

[0003] In order to improve the smoothness of shaving agents, Patent Document 1 proposes a non-foaming gel shaving agent composition containing a carboxyvinyl polymer and a highly polymerized polyethylene oxide having a number-average molecular weight of 100,000 or more. In addition, in order to improve rinsing properties, Patent Document 2 proposes a gel shaving cosmetic composition containing a vinylpyrrolidone-vinyl acetate copolymer and a polyoxyethylene-methylpolysiloxane copolymer. Thus, gel shaving agents have been developed that combine smoothness and rinsing properties.

[0004] In recent years, shaving products with even higher added value have been developed, with Patent Document 3 proposing a gel shaving composition containing an acidic mucopolysaccharide, a carboxyvinyl polymer, and a polyhydric alcohol, and Patent Document 4 proposing a gel shaving composition containing a polymer thickening gelling agent and highly polymerized polyethylene oxide having a number-average molecular weight of 100,000 to 700,000. These products offer improved moisturizing sensation after shaving.

[0005] On the other hand, one of the effects required for skin care cosmetics is to improve skin elasticity after use, that is, to provide a firm feeling. To achieve this effect, Patent Document 5 proposes a composition containing niacinamide, propylene glycol or polypropylene glycol, and water. However, no shaving agent with a high skin care effect that can provide such a firm feeling after shaving has been developed to date. Therefore, there is a need for the development of a shaving agent composition that provides excellent close shaving, rinsability after use, and moisturizing feeling, as well as providing a firm feeling. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-306881 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-225355 [Patent Document 3] Japanese Patent Application Laid-Open No. 2013-95674 [Patent Document 4] Japanese Patent Application Publication No. 2018-203627 [Patent Document 5] Japanese Patent Application Publication No. 2019-131553 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, an object of the present invention is to provide a gel shaving composition that is excellent in deep shaving performance, has excellent rinsing properties after use, provides a moisturizing feeling, and can also impart a firm feeling. [Means for solving the problem]

[0008] As a result of intensive research to solve the above problems, the inventors discovered that a gel shaving composition that can solve the above problems can be obtained by combining a specific water-soluble alkylene oxide derivative, a tri- to hexahydric polyhydric alcohol, a polyacrylic acid-based water-soluble polymer, and a polyethylene glycol having a number-average molecular weight of 10,000 or more and 2,000,000 or less in amounts within specific ranges, and thus completed the present invention.

[0009] That is, the present invention provides the following gel shaving composition. A gel shaving composition comprising the following components (A), (B), (C) and (D): (A) 0.1% by mass to 10% by mass of a water-soluble alkylene oxide derivative represented by formula (1), (B)(b1) glycerin and (b2) One or more selected from diglycerin, glucose, fructose, sorbitol and inositol A combination of the above polyhydric alcohols in a mass ratio (b1) / (b2) of 1 / 10 to 1 / 1 is added in an amount of 10 mass% to 50 mass%. (C) 0.1% by mass to 2% by mass of a polyacrylic acid-based water-soluble polymer, (D) 0.01% by mass to 2% by mass of polyethylene glycol having a number average molecular weight of 10,000 or more and 2,000,000 or less Z-[O(PO)m(EO)n-(BO)pH]a Formula (1) (In formula (1), Z is a residue obtained by removing all hydroxyl groups from glycerin or an alkyl glucoside having 1 to 2 carbon atoms, and a is 3 PO is an oxypropylene group, EO is an oxyethylene group, and BO is an oxyalkylene group having 4 carbon atoms. m, n, and p are the average number of moles of PO, EO, and BO added per one hydroxyl group, respectively. m and n are each 0 to 15, and p is 0 to 5. However, m, n, and p are not all 0 at the same time. [Effects of the Invention]

[0010] The gel shaving composition of the present invention is excellent in deep shaving performance, and also in rinsing properties and moisturizing feeling after use, and can also impart a firm feeling to the shaving hair. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described. In this specification, numerical ranges defined using the symbol "to" include both the upper and lower limits of the symbol "to." For example, "2 to 5" means a range of 2 or more and 5 or less. In the following, the term "gel shaving composition" will also be referred to simply as the "shaving composition."

[0012] The shaving composition of the present invention contains (A) a water-soluble alkylene oxide derivative, (B) a trihydric to hexahydric polyhydric alcohol, (C) a water-soluble polyacrylic acid polymer, and (D) a polyethylene glycol having a number-average molecular weight of 10,000 to 2,000,000. Each component will be described below.

[0013] [(A) Water-soluble alkylene oxide derivative] The component (A) used in the shaving composition of the present invention is a water-soluble alkylene oxide derivative represented by formula (1). Z-[O(PO)m(EO)n-(BO)pH]a Formula (1)

[0014] In formula (1), Z is a residue obtained by removing all hydroxyl groups from a compound having 2 to 4 hydroxyl groups (i.e., (Z(OH)a)). a is the number of hydroxyl groups in the compound, which is 2 to 4. The compound (Z(OH)a) is preferably a hydroxyl group-containing hydrocarbon, more preferably a hydroxyl group-containing saturated hydrocarbon. For example, when a=2, ethylene glycol, propanediol, butylene glycol, when a=3, glycerin, trimethylolpropane, when a=4, erythritol, pentaerythritol, sorbitan, alkyl glycoside, diglycerin, etc. can be mentioned, and mixtures of these can also be used. Among these, as the compound (Z(OH)a), glycerin and alkyl glucosides having 1 to 2 carbon atoms are preferred, and alkyl glucosides having 1 to 2 carbon atoms are particularly preferred. Note that "alkyl glucosides having 1 to 2 carbon atoms" refers to ethers in which the hydrogen atom of one of the hydroxyl groups of glucose is substituted with an alkyl group having 1 to 2 carbon atoms. As the alkyl glucosides having 1 to 2 carbon atoms, methyl glucoside is particularly preferred. In formula (1), if a is less than 2, the moisturizing feeling after use may not be obtained. If a is more than 4, the close shaving ability may decrease. From this viewpoint, it is more preferable that Z is a residue obtained by removing all hydroxyl groups from a compound having 3 to 4 hydroxyl groups (Z(OH)a), and a is 3 to 4.

[0015] PO is an oxypropylene group, EO is an oxyethylene group, and BO is an oxyalkylene group having 4 carbon atoms. m, n, and p are the average number of moles of PO, EO, and BO added per one hydroxyl group, respectively. m and n are each 0 to 15, and preferably 0 to 10. p is 0 to 5, and preferably 0 to 2. Furthermore, m, n, and p are not all 0 at the same time, and the total number of moles of m, n, and p added per molecule of component (A), a×(m+n+p), is preferably 1-50, and more preferably 5-25. If the values ​​of m, n, and p are too large, good firmness may not be obtained and rinsing properties may be reduced. When m=0, n=1 to 10 and p=0 are preferred, and n=3 to 7 and p=0 are more preferred. When n=0, m=1 to 10 and p=0 are preferred, and m=1 to 5 and p=0 are more preferred. When m and n are not both 0, m and n are preferably 1 to 10 and p=0 to 2, and more preferably m=1 to 5, n=5 to 10 and p=1 to 2. Among these, those in which m=0, n=3 to 7 and p=0 are particularly preferred. When m, n, and p are not all 0, PO and EO are added randomly, and BO is added in blocks to the end of Z via PO and EO. When either m or n is 0 and p is not 0, BO is added in blocks to the end of Z via a block of PO or EO.

[0016] The water-soluble alkylene oxide derivative represented by formula (1) can be produced by a known method. For example, when none of m, n, and p is 0, the derivative can be obtained by addition-polymerizing ethylene oxide and propylene oxide with a compound having 2 to 4 hydroxyl groups, followed by reaction with an alkylene oxide (e.g., butylene oxide) that provides an oxyalkylene group having 4 carbon atoms. Note that m, n, and a in formula (1) can be adjusted by adjusting the respective reaction molar ratios of ethylene oxide, propylene oxide, and the alkylene oxide that provides the oxyalkylene group having 4 carbon atoms.

[0017] The shaving composition of the present invention may contain, as component (A), one kind selected from the above water-soluble alkylene oxide derivatives, either alone or in combination of two or more kinds.

[0018] The content of component (A) is 0.1 to 10% by mass, preferably 0.2 to 8% by mass, and more preferably 0.5 to 5% by mass, based on the total mass of the shaving composition. If the content of component (A) is too low, the moisturizing feeling and firmness may decrease, whereas if the content of component (A) is too high, the rinsing properties may decrease.

[0019] [(B) Trihydric to hexahydric polyhydric alcohol] Component (B) used in the shaving composition of the present invention is a tri- to hexavalent polyhydric alcohol having 3 to 6 hydroxyl groups in the molecule, such as glycerin, diglycerin, glucose, fructose, sorbitol, inositol, etc. The valence of component (B) is preferably tetra- to hexavalent, more preferably hexavalent.

[0020] The shaving composition of the present invention may contain, as component (B), one kind selected from the above polyhydric alcohols, either alone or in combination of two or more kinds. When two or more types are combined, a combination of (b1) a trihydric polyhydric alcohol and (b2) a tetrahydric to hexahydric polyhydric alcohol is preferred, and a combination of (b1) a trihydric polyhydric alcohol and (b2) a hexahydric polyhydric alcohol is more preferred. The mass ratio of (b1) to (b2), (b1) / (b2), is preferably 1 / 10 to 1 / 1, more preferably 1 / 8 to 1 / 2, and even more preferably 1 / 6 to 1 / 3.

[0021] In the present invention, commercially available cosmetic raw materials can be used as component (B). Specific examples of such products include "RG·Co·P" (glycerin) manufactured by NOF Corporation, "Diglycerin 801" manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., "Sorbit D-70" (sorbitol content = 70% by mass) manufactured by Mitsubishi Corporation Life Sciences, "Sorbitol Kao" (sorbitol content = 69.5 to 70.5% by mass) manufactured by Kao Corporation, and "Inositol" manufactured by Tsuno Foods Industry Co., Ltd.

[0022] The content of component (B) is 10 to 50% by mass, preferably 10 to 40% by mass, and more preferably 20 to 40% by mass, based on the total mass of the shaving composition. If the content of component (B) is too low, the close shave, moisturizing feeling, and firmness may decrease, while if the content of component (B) is too high, the rinsing ability may decrease.

[0023] [(C) Polyacrylic acid-based water-soluble polymer] Component (C) used in the shaving composition of the present invention is a polyacrylic acid-based water-soluble polymer, such as sodium poly(meth)acrylate, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer ((meth)acrylic acid-(meth)acrylic acid alkyl copolymer), poly(meth)acrylic acid amide, (meth)acrylamide-(meth)acrylic acid copolymer, etc. Here, (meth)acrylic represents acrylic or methacrylic. The alkyl group in the alkyl-modified carboxyvinyl polymer preferably has 1 to 50 carbon atoms, more preferably 5 to 40 carbon atoms, and even more preferably 10 to 30 carbon atoms.

[0024] These water-soluble polyacrylic acid polymers are usually neutralized with sodium hydroxide, potassium hydroxide, triethanolamine, triethylamine, basic amino acids such as lysine and arginine, or the like before use.

[0025] In the present invention, commercially available cosmetic raw materials can be used as component (C). Specific examples include Lubrizol Advanced Materials' "Carbopol 940" (carboxyvinyl polymer), "Carbopol 941" (carboxyvinyl polymer), "Carbopol 1342" (alkyl-modified carboxyvinyl polymer), "Carbopol ETD2020" (alkyl-modified carboxyvinyl polymer), "Carbopol Ultrez 10" (carboxyvinyl polymer), and "Carbopol Ultrez 21" (alkyl-modified carboxyvinyl polymer); Sumitomo Seika Chemicals' "AQUPEC HV-505E" (carboxyvinyl polymer) and "AQUPEC HV-501ER" (alkyl-modified carboxyvinyl polymer); and 3V Sigma's "Syntharen K" (carboxyvinyl polymer) and "Syntharen L" (carboxyvinyl polymer). Among these, carboxyvinyl polymers are preferred.

[0026] The shaving composition of the present invention may contain, as component (C), one type selected from the above-mentioned polyacrylic acid-based water-soluble polymers, either alone or in combination of two or more types.

[0027] The content of component (C) is 0.1 to 2% by mass, preferably 0.2 to 1.5% by mass, and more preferably 0.3 to 1.0% by mass, based on the total mass of the shaving composition. If the content of component (C) is too low, the close shave and firmness may decrease, whereas if the content of component (C) is too high, the close shave and rinsability may decrease.

[0028] [(D) Polyethylene glycol having a number average molecular weight of 10,000 or more and 2,000,000 or less] The component (D) used in the shaving composition of the present invention is a polyethylene glycol having a number average molecular weight of 10,000 to 2,000,000. Such polyethylene glycol is a polyether obtained by polymerizing ethylene glycol, and one having a number average molecular weight of 10,000 to 2,000,000 is used. The number average molecular weight of the polyethylene glycol is preferably 100,000 to 1,500,000, more preferably 300,000 to 1,000,000, and even more preferably 300,000 to 600,000. The number average molecular weight of the polyethylene glycol can be determined by gel permeation chromatography.

[0029] In the present invention, commercially available cosmetic raw materials can be used as component (D). Specific examples include NOF Corp.'s "PEG#20000" (number average molecular weight: 20,000), Meisei Chemical Industry Co., Ltd.'s "Alcox E-30" (number average molecular weight: 400,000 to 550,000), and Meisei Chemical Industry Co., Ltd.'s "Alcox E-60" (number average molecular weight: 1,000,000 to 1,500,000).

[0030] The shaving composition of the present invention can contain, as component (D), one type selected from polyethylene glycols having a number average molecular weight of 10,000 or more and 2,000,000 or less, either alone or in combination with two or more types having different number average molecular weights.

[0031] The content of component (D) is from 0.01 to 2% by mass, preferably from 0.04 to 1.5% by mass, and more preferably from 0.06 to 1.0% by mass, based on the total mass of the shaving composition. If the content of component (D) is too low, the close shave and the moisturizing and firming feeling after use may decrease, while if the content of component (D) is too high, the rinsing properties may decrease.

[0032] [Other ingredients] The shaving composition of the present invention usually contains water in addition to the above components (A) to (D). Examples of water include purified water such as distilled water and deionized water, tap water, and industrial water, and water suitable for producing cosmetics, quasi-drugs, pharmaceuticals, and the like is used.

[0033] The water content in the shaving composition of the present invention is set so that the total amount becomes 100% by mass after adding the above components (A) to (D) and, if necessary, the additives described below, and is typically 30 to 80% by mass, preferably 60 to 80% by mass, and more preferably 50 to 70% by mass.

[0034] In addition to the above components (A) to (D) and water, the shaving composition of the present invention may contain, if necessary, common additives used in cosmetics, quasi-drugs, pharmaceuticals, etc., within the scope of the present invention. Examples of such additives include anionic surfactants such as sodium N-coconut oil fatty acid acyl-N-methyl taurate and sodium N-lauroyl-N-methyl-β-alanine; lower alcohols such as ethanol and isopropanol; dihydric polyhydric alcohols such as 1,3-butylene glycol, dipropylene glycol, and propylene glycol; sugars such as lactose and sucrose; hydrocarbon oils such as liquid paraffin, squalane, and petrolatum; silicone oils such as dimethylpolysiloxane and cyclic dimethylpolysiloxane; silicone derivatives such as amino-modified dimethylpolysiloxane; lipids such as ceramide and lecithin; sterols such as cholesterol; thickening polysaccharides such as xanthan gum; organic salts such as citrate and malate; inorganic salts such as table salt; acids and alkalis as pH adjusters; preservatives such as parahydroxybenzoates; anti-inflammatory agents; disinfectants; viscosity adjusters; cooling agents; chelating agents; extracts derived from animals and plants; vitamins; amino acids; colorants; pigments; and fragrances.

[0035] The shaving composition of the present invention may contain one kind selected from the above-mentioned additives alone or in combination of two or more kinds, as needed. The content of the above additives in the shaving composition of the present invention can be set according to the amount typically used in cosmetics, etc., depending on the purpose, but is typically 20% by mass or less, preferably 0.1 to 15% by mass, and more preferably 0.5 to 10% by mass.

[0036] The shaving composition of the present invention can be produced by conventional methods, for example, by adding the above components (A) to (D), and, if necessary, general additives, to water in that order, mixing them, and making them homogeneous. [Example]

[0037] The present invention will be specifically described below with reference to examples and comparative examples.

[0038] [Example 1~ 7, Reference examples 1~11 and Comparative Examples 1 to 7] According to the formulations shown in Tables 2 and 3, components (A) through (D), component (D'), other additives, and fragrance were added sequentially to purified water and mixed uniformly to prepare gel shaving compositions. Five water-soluble alkylene oxide derivatives shown in Table 1 below were used as component (A). In Table 1, Z, a, m, n, and p represent the symbols in formula (1).

[0039] [Table 1]

[0040] The numerical values ​​corresponding to each component in Tables 2 and 3 indicate the content (mass%) of each component relative to the total amount (100 mass%) of the gel shaving composition, and are the blended amount of the active ingredient (target ingredient) or solid content contained in the product used. A "-" in the tables indicates that the component is not contained.

[0041] The products used as each component shown in Tables 2 and 3 are listed below. Unless otherwise specified, the physical property values ​​are values ​​determined by the methods described in this specification. (i) Component (A) (A-1): "MacbioBride MG-10E" (NOF Corporation) (A-2): "MacbioBride MG-20E" (NOF Corporation) (A-3): "MacbioBride MG-10P" (NOF Corporation) (A-4): "Wilbride S-753" (NOF Corporation) (A-5): "Wilbride MG-2070" (NOF Corporation) (ii) Component (B) (B-1): "Sorbit D-70" (manufactured by Meisei Chemical Industry Co., Ltd.) (sorbitol content = 70% by mass) (B-2): "RG·Co·P" (glycerin) (manufactured by NOF Corporation) (B-3): "Diglycerin 801" (manufactured by Sakamoto Pharmaceutical Co., Ltd.) (iii) (C) component Acrylic acid / alkyl methacrylate copolymer; "Carbopol Ultrez 21" (carboxyvinyl polymer) (manufactured by Lubrizol Japan, Inc.) (iv)(D) component (D-1) Polyethylene glycol (number average molecular weight 20,000); "PEG#20000" (NOF Corporation) (D-2) Polyethylene glycol (number average molecular weight approximately 500,000); "Alcox E-30" (manufactured by Meisei Chemical Industry Co., Ltd.) (D-3) Polyethylene glycol (number average molecular weight: approximately 1.2 million); "Alcox E-60" (manufactured by Meisei Chemical Industry Co., Ltd.) (v)(D') component (D'-1) Polyethylene glycol (number average molecular weight 1500); "PEG#1540" (NOF Corporation) (D'-2) Polyethylene glycol (number average molecular weight: approximately 4,000,000); "Alcox E-160" (manufactured by Meisei Chemical Industry Co., Ltd.) (D'-3) Hydroxyethyl cellulose; "HEC Daicel SE900" (manufactured by Daicel Corporation) (vi) Other additives The ten additives shown in Table 4 were used. (vii)Fragrance A commercially available cosmetic product was used.

[0042] Example 1 7, Reference examples 1~11 Shaving was performed using the gel shaving compositions of Comparative Examples 1 to 7 according to the following method, and the following evaluations were made: (1) close shaving, (2) rinsing, (3) moisturizing feeling after use, and (4) firmness. <How to use> Twenty men (aged 21 to 59) were used as panelists, and each panelist dispensed approximately 4 g of each shaving agent composition onto the palm of their hand, spread it over their cheeks and around their mouths, and massaged for 30 seconds. Then, they shaved the area where the shaving agent was applied from top to bottom twice with a razor (YOUNG-T, manufactured by Kai Corporation), and rinsed the shaving agent composition off with running water.

[0043] (1) Close shaving Immediately after shaving, the subjects were asked to evaluate the sensation of the shaved area according to the following evaluation criteria, and the total score of the 20 subjects was calculated and judged according to the following criteria. Evaluation Criteria 2 points: If you feel you got a close enough shave 1 point: If you feel you got a close shave 0 points: If you feel you cannot get a close shave <Judgment criteria> ⊚: Total score of 30 points or more; a shaving composition with extremely close shaving properties. ◯: Total score is 20 or more but less than 30 points; the shaving composition provides a close shave. Δ: Total score is 10 or more but less than 20 points; the shaving composition has a slightly low close shave performance. ×: Total score is less than 10 points; the shaving composition does not provide a deep shave.

[0044] (2) Rinseability The rinsing ability when rinsing off the shaving agent was evaluated according to the following evaluation criteria, and the total score of the 20 panelists was calculated and judged according to the following evaluation criteria. Evaluation Criteria 2 points: If you feel that the composition on your skin is very easy to rinse off with water 1 point: If you feel that the composition on your skin is easy to rinse off with water 0 points: If the composition on your skin is difficult to rinse off with water <Judgment criteria> ⊚: Total score of 30 points or more; a shaving composition with very good razor rinsing properties. ◯: Total score is 20 or more but less than 30 points; the shaving composition has excellent razor rinsing properties. Δ: Total score is 10 or more but less than 20 points; the shaving composition has a slightly poor razor rinsability. ×: Total score is less than 10 points; the shaving composition has poor razor rinsability.

[0045] (3) Moisturizing feeling after use The moisturizing feeling one hour after rinsing off the shaving composition was evaluated according to the following evaluation criteria, and the total score of the 20 panelists was calculated and judged according to the following evaluation criteria. Evaluation Criteria 2 points: If you feel a sufficient moisturizing sensation after shaving 1 point: If you feel a slight moisturizing sensation after shaving 0 points: If you did not feel any moisturizing sensation after shaving <Judgment criteria> ⊚: Total score of 30 points or more; a shaving composition that provides an extremely moisturizing feeling after shaving. ◯: Total score is 20 or more but less than 30 points; the shaving composition provides a high moisturizing feeling after shaving. Δ: Total score is 10 or more but less than 20 points; the shaving composition provides a slightly low moisturizing feeling after shaving. ×: Total score is less than 10 points; the shaving composition provides a poor moisturizing feeling after shaving.

[0046] (4) Firmness The subjects shaved once a day for one month using the above method, and after continuous use, they were asked to evaluate the firmness of their skin according to the following evaluation criteria. The total score of the 20 subjects was calculated and judged according to the following criteria. Evaluation Criteria 2 points: Skin elasticity has improved compared to before continuous use, and you feel a sense of firmness 1 point: Skin elasticity has improved slightly compared to before continuous use, and you feel a slight firmness 0 points: No change in skin elasticity compared to before continuous use, no firmness felt <Judgment criteria> ⊚: Total score of 30 or more; a shaving composition that provides an extremely firm feeling. ◯: Total score is 20 or more but less than 30 points; the shaving composition provides a high level of firmness. Δ: Total score is 10 or more but less than 20 points; this is a shaving composition that does not provide a very firm feeling. ×: Total score is less than 10 points; the shaving composition does not provide a firm feeling.

[0047] The evaluation results are shown in Tables 2 and 3. The numbers in parentheses accompanying each evaluation result indicate the total score obtained for each evaluation.

[0048] [Table 2]

[0049] [Table 3]

[0050] [Table 4]

[0051] As shown in Table 2, Examples 1 to 7 All of the shaving compositions were evaluated as being excellent in terms of deep shaving performance, rinsing properties after use, and moisturizing and firming sensations. In particular, the contents of the components (A) to (D) are within the above-mentioned more preferable ranges, and the components (A), (B) and (D) are each the above-mentioned preferable ranges. 1 of The gel shaving composition was rated as "Excellent" in all evaluation items.

[0052] On the other hand, none of the gel shaving compositions of Comparative Examples 1 to 7 received a rating of "Good" or better in any of the evaluation items. Specifically, the shaving composition of Comparative Example 1, which did not contain component (A), was evaluated as providing insufficient moisturizing and firming sensations after use. The shaving composition of Comparative Example 2, which did not contain component (B), was evaluated as being insufficient in terms of close shaving ability and moisturizing feeling after use, and as having poor firmness. The shaving composition of Comparative Example 3, which did not contain component (C), was evaluated as being insufficient in terms of close shaving performance, moisturizing feeling after use, and firmness. The shaving composition of Comparative Example 4, which did not contain component (D), was also evaluated as being insufficient in terms of close shaving performance, moisturizing feeling after use, and firmness. The shaving composition of Comparative Example 5, which contained polyethylene glycol having a number average molecular weight of 1500 (component (D'-1)) instead of component (D), was evaluated as providing insufficient moisturizing and firming sensations after use. The shaving composition of Comparative Example 6, which contained polyethylene glycol having a number average molecular weight of 4,000,000 (component (D'-2)) instead of component (D), was evaluated as having insufficient rinsing properties. The shaving composition of Comparative Example 7, which contained hydroxyethyl cellulose (component (D'-3)) instead of component (D), was evaluated as providing insufficient moisturizing and firming sensations after use. The above evaluation results show that the shaving composition of the examples of the present invention can achieve close shaving, rinsing properties, and a moisturizing and firming feeling after use that could not be achieved with conventional shaving compositions. [Industrial Applicability]

[0053] The gel shaving composition of the present invention can be used in treatments for treating the skin using a razor or electric shaver, and can be used to shave unwanted hair not only from the beard but also from various parts of the body, such as the forehead, eyebrows, cheeks, around the nostrils, around the mouth, nape, décolleté, upper arms, and back.

Claims

[Claim 1] A gel shaving composition comprising the following components (A), (B), (C) and (D): (A) 0.1% by mass to 10% by mass of a water-soluble alkylene oxide derivative represented by formula (1) (B) 10% by mass to 50% by mass of a combination of (b1) glycerin and (b2) one or more polyhydric alcohols selected from diglycerin, glucose, fructose, sorbitol, and inositol in a mass ratio (b1) / (b2) of 1 / 10 to 1 / 1 (C) 0.1% by mass to 2% by mass of a polyacrylic acid-based water-soluble polymer (D) 0.01% by mass to 2% by mass of polyethylene glycol having a number average molecular weight of 10,000 or more and 2,000,000 or less Z-[O(PO)m(EO)n-(BO)pH]a Formula (1) (In formula (1), Z is a residue obtained by removing all hydroxyl groups from glycerin or an alkyl glucoside having 1 or 2 carbon atoms, and a is 3 or 4. PO is an oxypropylene group, EO is an oxyethylene group, and BO is an oxyalkylene group having 4 carbon atoms. m, n, and p are the average number of moles of PO, EO, and BO added per one hydroxyl group, respectively. m and n are each 0 to 15, and p is 0 to 5, provided that m, n, and p are not all 0 at the same time.)

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