JP2013139422A - Shaving gel composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaving gel composition that little gives loads to skin and gives actual feeling of a razor with smooth slipping even if shaving is repeated.SOLUTION: The shaving gel composition includes: a component (A) carboxyvinyl polymer, acrylic acid-methacrylic acid alkyl ester copolymer, and polymers selected from their salts; a component (B) carboxymethyl cellulose or salts thereof; and a component (C) water, wherein the component (A) contains 0.85 to 2 mass% based on the total composition; wherein the component (C) contains 70 to 99 mass% based on the total composition, and the mass ratio ((B)/(A)) of the component (B) to the component (A) is 0.05 to 1.

Description

  The present invention relates to a gel-like shaving agent composition.

  A shaving agent is used when shaving a sword or body hair with a razor. When shaving swords and body hair with a razor, the old stratum corneum of the skin is also scraped off, so it is considered to be susceptible to irritation and the like. Therefore, it is preferable that the shaving agent itself has a small influence on the skin. Furthermore, skin care consciousness is increasing even in men, mainly in the younger generation in their twenties, and there is a demand for a shaving agent that improves the sliding of the razor blade and does not damage the skin.

There are many shaving agents based on fatty acid soaps. For example, in addition to general soaps, there are shaving soaps, shaving creams, aerosol-type shaving foams, post-foaming gel creams, and the like (Non-Patent Document 1). ). Non-foaming gel-like shaving agents are also known (Patent Documents 1 to 3).

Japanese Patent Laid-Open No. 9-132516 Japanese Patent Laid-Open No. 10-87454 JP 2007-55987 A

“New Cosmetics,” Nanzan-do, 2nd edition, 2001, p. 392-396

  Up to now, the type of safety razor in which one or two blades are mounted side by side has been the mainstream, but in recent years, three or more types (hereinafter referred to as “multiple blades”) have become common. Although the multi-blade is appealing to the gentleness to the skin, if the same part is shaved repeatedly because it removes a lot of shaving agent, it may cause rough skin. With conventional shaving agents (Patent Documents 1 to 3 and Non-Patent Document 1), it is not always sufficient to deal with a multi-blade razor.

  An object of the present invention is to provide a gel-like shaving agent composition that realizes sliding of a razor even if it is repeatedly shaved and has a low burden on the skin.

  When the present inventors use a carboxyvinyl polymer, a polymer selected from an acrylic acid / alkyl methacrylate copolymer and a salt thereof, carboxymethylcellulose or a salt thereof, and water in combination at a specific ratio, It has been found that a gel-like shaving agent composition that solves the above can be obtained.

That is, the present invention
The following components (A), (B) and (C)
(A) Polymer selected from carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer and salts thereof (B) Carboxymethyl cellulose or a salt thereof
(C) contains water,
Content of the said component (A) is 0.85 mass% or more and 2 mass% or less in the whole composition,
Content of the said component (C) is 70 to 99 mass% in the whole composition,
A gel-like shaving agent composition having a mass ratio ((B) / (A)) of the component (B) to the component (A) of 0.05 to 1 is provided.

  In addition, the present invention provides a shaving method in which the gel-like shaving agent composition is applied to the skin and shaved, and then washed away.

  ADVANTAGE OF THE INVENTION According to this invention, even if it shave repeatedly, the gel-like shaving agent composition which actualizes the sliding of a razor and has few burdens on skin is provided.

  Hereinafter, embodiments of the present invention will be described.

  The carboxyvinyl polymer of component (A) is a crosslinked acrylic acid polymer (INCI name: carbomer). Specifically, for example, Carbopol 910, 934, 940, 941, 980, 2984, ETD 2050, Ultraz 10 (above, Lubrizol Advanced Materials), Hibiswako 104, 105 (above, Wako Pure Chemical Industries, Ltd.), etc. Commercial products can be used.

  The component (A) acrylic acid / alkyl methacrylate copolymer is a copolymer of acrylic acid and an alkyl methacrylate having 10 to 30 carbon atoms (INCI name: acrylic acid / alkyl acrylate (C10-30)). ). Specifically, commercially available products such as Pemlen TR-1, Pemlen TR-2, Carbopol ETD 2020, 1382, Ultrez 20, Ultrez 21 (manufactured by Lubrizol Advanced Materials) can be used.

  In the gel-like shaving agent composition, it is preferable that the carboxyvinyl polymer and the acrylic acid / alkyl methacrylate copolymer are all neutralized and part or all of them form a salt. Examples of the salt include alkanolamine salts, amino acid salts, ammonium salts, alkali metal salts and the like. Although the base which neutralizes a component (A) is not limited, For example, organic base compounds, such as alkanolamine and a basic amino acid, inorganic base compounds, such as ammonia and an alkali metal hydroxide, are mentioned. Specifically, as alkanolamine, triethanolamine, 2-amino-2-methyl-1-propanol, etc .; as basic amino acid, arginine, lysine, histidine, etc .; as alkali metal hydroxide, sodium hydroxide, hydroxide Potassium etc. can be used. Among these, an inorganic base compound is preferable from the viewpoint of stability, and an alkali metal hydroxide is more preferable.

  The content of the component (A) is 0.85% by mass or more, preferably 0.9% by mass in the gel-like shaving agent composition as an acid from the viewpoint of forming a firm gel and obtaining a good feeling of use. %, More preferably 0.95% by mass or more, 2% by mass or less, preferably 1.8% by mass or less, and further preferably 1.5% by mass or less. Moreover, it is 0.85-2 mass%, Preferably it is 0.9-1.8 mass%, More preferably, it is 0.95-1.5 mass%. Since component (A) retains a sufficient amount of moisture and is adsorbed on the skin, by setting the content within this range, it is possible to replenish sufficient moisture to the wrinkles.

The component (B) carboxymethyl cellulose is a derivative of cellulose, and is obtained by binding a carboxymethyl group (—CH ₂ —COOH) to a part of the hydroxy group of the glucopyranose monomer constituting the skeleton of the cellulose. Component (B) is preferably neutralized and part or all of which forms a salt. Although the base which neutralizes a component (B) is not limited, For example, organic base compounds, such as alkanolamine and a basic amino acid, inorganic base compounds, such as ammonia and an alkali metal hydroxide, are mentioned. Specifically, as alkanolamine, triethanolamine, 2-amino-2-methyl-1-propanol, etc .; as basic amino acid, arginine, lysine, histidine, etc .; as alkali metal hydroxide, sodium hydroxide, hydroxide Potassium etc. can be used. Among these, an inorganic base compound is preferable from the viewpoint of stability, and an alkali metal hydroxide is more preferable. Furthermore, sodium carboxymethylcellulose is preferable.

  As the component (B) carboxymethyl cellulose or a salt thereof, those used in cosmetics and the like can be used. For example, Ernest gum FD-HH, FD-M, CMC Daicel 1150, 1350 (above, Daicel Commercial products such as Sunrose F600MC, F300HC (Nippon Paper Chemical Co., Ltd.) can be used.

  Content of a component (B) is 0.043 mass% or more in a gel-like shaving agent composition as a salt from a viewpoint of preventing the melt of the gel at the time of apply | coating to skin, Preferably it is 0.085 mass%. More preferably, it is 0.2% by mass or more, preferably 2% by mass or less, preferably 1.7% by mass or less, and more preferably 1% by mass or less. Moreover, 0.05-2 mass% is preferable, More preferably, it is 0.1-1.5 mass%, More preferably, it is 0.2-1.0 mass%. By making content of a component (B) into this range, the sliding of a razor can be improved.

  In the gel-like shaving agent composition of the present invention, the mass ratio of the component (A) and the component (B) is (B) / (A) = 0.05 to 1, preferably 0.1 to 0. .85. By making (B) / (A) within this range, the stability of the preparation is good, the gel thinning at the time of application to the skin is weakened, and the skin residue of the agent can be improved even after shaving. .

  The content of component (C) water is 70% by mass or more, preferably 80% by mass or more, and 99% by mass or less in the gel-like shaving agent composition from the viewpoint of softening wrinkles and skin. The mass% or less is preferable.

  The gel-like shaving agent composition of the present invention preferably further contains a salt as the component (D). The salt of component (D) adjusts the viscosity of the gel-like shaving agent composition obtained from components (A) to (C), suppresses the decrease in the viscosity of the gel that occurs when applied to the skin, and is firmly applied when applied. Gel can be applied. As a result, even after shaving repeatedly, the gel remains on the skin, making it difficult to damage the skin.

  Examples of the component (D) salt include alkanolamine salts, organic compound salts such as carboxylates and amino acid salts, and inorganic compound salts such as alkali metal salts. Specific examples of the alkanolamine salt include triethanolamine hydrochloride, triethanolamine sulfate, and triethanolamine phosphate. Examples of amino acid salts include arginine hydrochloride and arginine phosphate. Examples of the salt of a combination of polyvalent acid monobases include sodium succinate and potassium succinate as combinations of divalent acid monobases. Examples of combinations of trivalent acid monobases include sodium citrate and potassium citrate. Examples of inorganic compound salts include sodium chloride and potassium chloride. As a combination salt of polyvalent acid monobase, as a combination of divalent acid monobase, as a combination of sodium sulfate, potassium sulfate and trivalent acid monobase. Examples thereof include sodium phosphate, sodium hydrogen phosphate, potassium phosphate, and potassium hydrogen phosphate.

  Especially, the salt of the combination of organic and inorganic polyvalent acid monobase is preferable from the viewpoint that the content can be reduced. Furthermore, a combination of an inorganic weak acid and a strong base is preferable in that it has a buffering capacity and stability is improved. More specifically, sodium phosphate, sodium hydrogen phosphate, potassium phosphate, and potassium hydrogen phosphate are more preferable.

  The content of the component (D) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and preferably 1% by mass or less in the gel-like shaving agent composition. Is 0.8 mass% or less. By making the content of the component (D) within this range, when applied to the skin, the gel viscosity is reduced on the skin and a firm and firm gel structure can be maintained. Even afterwards, the gel remains on the skin, making it difficult to damage the skin.

  In the gel-like shaving agent composition of the present invention, the mass ratio of the component (A) and the component (D) is preferably (D) / (A) = 0.05 to 1, more preferably 0. .1 to 0.8. By setting (D) / (A) within this range, when applied to the skin, it is possible to maintain a firm gel structure with less thinning on the skin and strong firmness. A shaving agent composition that can impart a feeling of feeling and protect the skin can be obtained.

  The gel-like shaving agent composition of the present invention preferably contains a highly polymerized polyethylene oxide having a number average molecular weight of 100,000 or more as the component (E) from the viewpoint of enhancing the slidability of a razor. The number average molecular weight of the highly polymerized polyethylene oxide of component (E) is preferably 100,000 or more, more preferably 400,000 to 6.5 million, and still more preferably 2 million to 4 million.

  The content of the component (E) is preferably 0.01% by mass or more in the gel-like shaving agent composition, more preferably 0.03% by mass or more, and 0.3% by mass or less. Preferably it is 0.2 mass% or less. By making the content of the component (E) 0.01% by mass or more, the slidability of the razor is sufficiently improved, and by making it 0.3% by mass or less, the razor does not slide and deeply shave. It becomes easy, and it can be set as the gel-like shaving agent composition with which the feeling of use is good without generating stickiness or stringing.

  In the gel-like shaving agent composition of the present invention, the mass ratio of the component (A) and the component (E) is preferably (E) / (A) = 0.005 to 0.35, more preferably. Is 0.01-0.25. By making (E) / (A) within this range, it becomes easy to shave without causing the razor to slip, and it is easy to use without causing stickiness or stringing. can do.

  In addition, since the gel-like shaving agent composition of the present invention contains abundant moisture, it can supply a sufficient amount of moisture to body hair and skin such as wrinkles without dripping from the place where it is applied. Can be made soft enough. Moreover, since the gel-like shaving agent composition of the present invention has good slidability of the razor, a very good shaving feeling can be obtained.

  Moreover, since the gel-like shaving agent composition of the present invention remains firmly on the skin even after being shaved once, the sliding of the razor continues even after repeated shaving. In particular, since the gel-like shaving agent composition of the present invention remains firmly on the skin even when a multi-blade razor is used, the razor slips even after repeated shaving, and the skin is not easily damaged by the razor. You can feel the feeling of being protected. The multi-blade type razor is a razor having three or more blades, and those having 3 to 5 blades are commercially available.

  The present invention relates to the stability of a preparation by containing a carboxyvinyl polymer, a polymer selected from an acrylic acid / alkyl methacrylate copolymer and a salt thereof, carboxymethyl cellulose or a salt thereof, and water in a specific ratio. Sliding during shaving and razor sliding when repeatedly shaved are achieved. The mechanism of this effect is not always clear, but it is obtained by the interaction of a specific amount of carboxyvinyl polymer, a polymer selected from acrylic acid / alkyl methacrylate copolymer and salts thereof with carboxymethylcellulose or a salt thereof. It is inferred that the gel obtained is hard to reduce viscosity even when applied to the skin and maintains a firm structure. Moreover, it is thought that by including a salt, the apparent polymer density is increased and the gel strength is further increased. Furthermore, the polymer tends to remain on the skin after shaving, and it is considered that the slipperiness is maintained even if the razor is applied twice and three times.

  As described above, the gel-like shaving agent composition of the present invention is comfortable to shave, and remains firmly on the skin, so that the razor slips even after repeated shaving, and the skin is hardly damaged by the razor. It becomes possible to realize the feeling.

  Furthermore, the gel-like shaving agent composition of the present invention can contain other general components used in cosmetics, for example, viscosity modifiers, anti-inflammatory agents, ultraviolet absorbers, cooling agents, A pigment | dye, a fragrance | flavor, etc. can be contained. By containing these, according to the gel-like shaving agent composition of the present invention, it is possible to enjoy the feel adjustment of the dosage form, the refreshing feeling and the fragrance. In addition, if a bactericidal agent is added, the skin can be cleaned at the stage where the shaving agent is applied before using the razor, so that invasion of germs into the skin can be prevented.

The gel-like shaving agent composition of the present invention can be produced by a conventional method.
For example, a part of the component (C) water is heated and stirred in the blending tank to dissolve the component (B) carboxymethyl cellulose or a salt thereof (step 1). In some cases, component (E) highly polymerized polyethylene oxide is added and dissolved (step 3). A polymer selected from the component (A) carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer, and salts thereof is added to the remaining component (C) water and dispersed by stirring (step 2). The liquid obtained in Step 2 is mixed with the liquid obtained in Step 1 and Step 3 (Step 4). The solution is stirred and cooled to room temperature while being uniform (step 5). Optionally, the component (D) salt is added and dissolved. If necessary, other active ingredients suitable for cosmetics are sequentially added (step 6). Neutralize with neutralizing base (step 7). From the above, the gel-like shaving agent composition of the present invention can be produced.

The gel-like shaving agent composition of the present invention has a Brookfield viscosity (30 ° C.) of preferably 1,000 to 70,000 mPa · s, and 5,000 to 60,000 mPa · s. Further, it is more preferably 10,000 to 50,000 mPa · s. If the viscosity of the gel-like shaving agent composition is within this range, it is preferable because adhesion to wrinkles and skin is good, the razor applied to the application part is easy to extend and does not slide on the skin.
Here, the Brookfield viscosity can be measured with a B-type viscometer (Tokimek, TA type rotor, rotor rotational speed 5 r / min, measurement time 60 seconds, measurement temperature 30 ° C.).

  The specific formulation form of the gel-like shaving agent composition of the present invention is preferably a non-foaming shaving agent, and is preferably filled into a tube or bottle. Moreover, it is good also as a form with which the double pressure | voltage resistant container similar to the conventional post-foaming shaving gel aerosol product was filled.

  The gel-like shaving agent composition of the present invention can be applied to the skin as it is without foaming, and is difficult to sag. Therefore, when using the gel-like shaving agent composition of the present invention, the gel-like shaving agent composition is taken on the palm, applied to the skin as it is without lathering, and shaved body hair such as a razor is shaved. After that, just wash away with water. Moreover, the gel-like shaving agent composition of the present invention can be used particularly effectively when a multi-blade razor having three or more blades is used.

  As mentioned above, although embodiment of this invention was described, these are illustrations of this invention and various structures other than the above are also employable.

Examples 1-15, Comparative Examples 1-3
A gel-like shaving agent composition having the composition shown in Tables 1 to 3 was produced by a conventional method, easy to extend on the skin, slidability of a razor when shaved once, when the same part was shaved repeatedly 6 times The presence or absence of razor sliding, the feeling of razor loss, and the ease of razor washing were evaluated. A result is combined with Tables 1-3 and shown. In addition, in Tables 1-3, the numerical value of each component shows the mass%.

(Manufacturing method) Examples 1-15, Comparative Examples 1-3
The component (A) was added to a part of the water of the component (C), and stirred and dispersed (step 2). Component (B) and optionally component (E) were dispersed in glycerin, added to a portion of the component (C) water, heated to 80 ° C., stirred and dissolved (steps 1 and 3). The liquid in which the component (A) was dispersed, the liquid in which the component (B) and the component (E) were dissolved, were mixed and stirred to make uniform (step 4). Cooled to room temperature (step 5). To this liquid, component (D) was added to a part of water of component (C) and dissolved, and the mixture was stirred and made uniform (step 6). Further, a base was added to the remaining water of the component (C), and the diluted product was added and stirred to make it uniform (step 7) to obtain a gel-like shaving agent composition.

(Evaluation method)
Using each gel-like shaving agent composition, a panel of 10 adult males was shaved, and “Ease of extension of the agent on the skin”, “Less feeling of decrease in viscosity when applied”, “Skin "Thickness of the agent on the top", "Slidability of the razor when shaving once", "Sliding of the razor when shaving the same part 6 times", "Less feeling of razor loss The evaluation items of “Ease of washing off agent attached to razor” were subjected to sensory evaluation according to the following evaluation criteria. For shaving, after washing the face and wiping away moisture with a towel, 4 g of a gel-like shaving agent composition was applied to the heel by hand at 20 ° C. and 65% RH, and a four-blade safety razor (Quattro) was used. 4, Chic). The agent attached to the safety razor after shaving was rinsed with running water from tap water.

(1) Ease of extending the agent on the skin:
A: The number of panel members evaluated as being easy to apply the agent is 9 or more.
B: The number of panel members evaluated that the ease of application of the agent was good was 7-8.
C: The number of panel members evaluated as being easy to apply the agent was 5-6.
D: The number of panel members evaluated as being easy to apply the agent is 3 to 4 people.
E: The number of panels evaluated as being easy to apply the agent is 2 or less.

(2) Little reduction in viscosity during application:
A: Nine or more panel members evaluated that there was little decrease in viscosity during application.
B: The number of panel members evaluated that there was little feeling of a decrease in viscosity at the time of application was 7 to 8 people.
C: The number of panel members evaluated that there was little decrease in viscosity at the time of application was 5 to 6 persons.
D: The number of panel members evaluated that there was little feeling of a decrease in viscosity at the time of application was 3 to 4 people.
E: The number of panel members evaluated as having a low drop in viscosity at the time of application is 2 or less.

(3) Presence or absence of thickness of agent on skin:
A: The number of panel members who evaluated that the thickness of the agent on the skin was felt was 9 or more.
B: The number of panel members evaluated to feel the thickness of the agent on the skin is 7-8.
C: The number of panel members evaluated to feel the thickness of the agent on the skin is 5 to 6.
D: The number of panel members evaluated to feel the thickness of the agent on the skin is 3 to 4 people.
E: The number of panels evaluated to feel the thickness of the agent on the skin is 2 or less.

(4) Razor slipperiness when shaved once:
A: The number of panels evaluated that the slidability of the razor is good is 9 or more.
B: The number of panel members evaluated that the slidability of the razor was good was 7-8.
C: The number of panel members evaluated as having good slidability was 5-6.
D: The number of panel members evaluated as having good slidability was 3 to 4 people.
E: The number of panels evaluated that the slidability of the razor is good is 2 or less.

(5) Whether or not the razor feels when the same part is shaved repeatedly 6 times:
A: The number of panels evaluated as having a feeling of sliding razor is 9 or more.
B: The number of panels evaluated as having a feeling of sliding razor is 7-8.
C: The number of panel members evaluated to feel the sliding of a razor is 5-6.
D: The number of panel members evaluated to feel the sliding of a razor is 3-4.
E: The number of panels evaluated to feel the razor slipping is 2 or less.

(6) Feeling of razor loss:
A: The number of panels evaluated as having few razor losses is 9 or more.
B: The number of panels evaluated as having few razor losses was 7-8.
C: The number of panels evaluated as having few razor losses is 5-6.
D: The number of panels evaluated as having few razor losses was 3-4.
E: The number of panels evaluated as having few razor losses is 2 or less.

(7) Ease of razor washing:
A: Nine or more panelists evaluated that the agent attached to the razor was easy to wash away.
B: The number of panel members evaluated that the agent attached to the razor was easy to wash away was 7-8.
C: The number of panel members evaluated that the agent attached to the razor is easy to wash away is 5 to 6 people.
D: Three to four panel members evaluated that the agent attached to the razor was easy to wash away.
E: The number of panel members evaluated that the agent attached to the razor was easy to wash away was 2 or less.

Claims (7)

The following components (A), (B) and (C)
(A) a polymer selected from carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer and salts thereof (B) carboxylmethylcellulose or a salt thereof (C) containing water,
Content of the said component (A) is 0.85 mass% or more and 2 mass% or less in the whole composition,
Content of the said component (C) is 70 to 99 mass% in the whole composition,
The gel shaving agent composition whose mass ratio ((B) / (A)) of the said component (B) with respect to the said component (A) is 0.05-1.   Furthermore, the gel-like shaving agent composition of Claim 1 which contains 0.05 mass% or more and 1.0 mass% or less of a component (D) salt in the whole composition.   The gel-like shaving agent composition according to claim 2, wherein a mass ratio of the component (D) to the component (A) ((D) / (A)) is 0.05-1.   The component (E) further contains a highly polymerized polyethylene oxide having a number average molecular weight of 100,000 or more in a total composition of 0.01% by mass or more and 0.3% by mass or less. A gel-like shaving agent composition. The gel-like shaving agent composition according to claim 4, wherein a mass ratio ((E) / (A)) of the component (E) to the component (A) is 0.005 to 0.35.   The gel-like shaving agent composition according to any one of claims 1 to 5, which is used when a multi-blade razor having three or more blades is used.   A shaving method in which the gel-like shaving agent composition according to any one of claims 1 to 6 is applied to skin and shaved, and then washed away.