JP2015040180A - Gel composition for shaving - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gel composition for shaving which prevents dripping from skin at the time of application, and is excellent in a fitting feeling, and to provide a gel composition for shaving which allows deep shaving without clogging the composition in a shaving tool even if using a shaver with plural razors.SOLUTION: The gel composition for shaving contains tranexamic acid and/or a salt thereof, a carboxy vinyl polymer, polyol, and a cationic polymer.

Description

  The present invention relates to a gel-like composition for shaving used when shaving body hair with a razor.

  When shaving body hair such as a heel with a razor, a shaving composition is used. Gel-like shaving compositions are known from the viewpoint of improving adhesion to the skin during application and obtaining an excellent feeling of use. In order to make the composition into a gel, general-purpose thickeners such as carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer (acrylic acid / alkyl methacrylate copolymer) or xanthan gum are used. For example, in Patent Document 1, an acrylic acid / alkyl methacrylate copolymer is blended as a thickener, and in Patent Document 2, a carboxyvinyl polymer and an alkyl-modified carboxyvinyl polymer are blended as a thickener.

  Among the above thickeners, carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers can provide excellent usability, but they are poor in salt resistance, so they are prone to dripping from the skin, and are the main components of shaving compositions. When an anti-inflammatory agent such as dipotassium glycyrrhizinate (this component is a salt) is blended, there is a problem that the gel dosage form collapses and the viscosity decreases (decreases the viscosity).

  In order to solve such a problem, an attempt to add a large amount of carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer can be considered, but in such an attempt, 1) the viscosity of the composition becomes too high, and the razor on the skin. 2) When using a multi-blade shaving tool, clogging of the composition occurs between the blades, making it impossible to shave deeply. It became a problem.

JP 2011-026316 A JP 2013-095674 A

  Therefore, the subject of this invention is providing the gel-like composition for shavings which suppresses dripping from the skin at the time of application | coating, and is excellent in a feeling of adhesion. Furthermore, even when a shaving tool having two or more blades (multiple blades), which has been the mainstream in recent years, is used in the present invention, the composition can be deeply shaved without clogging the shaving tool. It is to provide a gel-like composition for shaving.

That is, the gist of the present invention is as follows.
The present invention relates to a gel-like composition for shaving comprising (A) tranexamic acid and / or a salt thereof, (B) a carboxyvinyl polymer, (C) a polyol, and (D) a cationic polymer.

  The main effects of the gel-like composition for shaving of the present invention are (1) a gel-like composition that does not reduce viscosity even when a small amount of thickener is added, and (2) dripping from the skin when applied. There is no fall, (3) The shaving tool's skin slip (blade sliding) is good and deep shaving is possible, (4) Even when a multi-blade shaving tool is used, clogging does not occur, Deep shaving is possible (5) It is possible to prevent the skin from drying after shaving.

  The present inventor chooses carboxyvinyl polymer as a thickener, and further blends tranexamic acid and / or a salt thereof known as an anti-inflammatory agent in a gel-like composition for shaving containing a polyol and a cationic polymer. Surprisingly, the inventors have found that the above-described effects can be exhibited, and completed the present invention.

(A) component (A) component in this specification is tranexamic acid and / or its salt. Although tranexamic acid is known as an anti-inflammatory agent in the cosmetics field, the present inventors have unexpectedly adversely affected the gel dosage form when tranexamic acid and / or its salt is incorporated into the gel-like composition. Found no. Based on this knowledge, it is possible to reduce the amount of the component (B) described later, and by blending the component (A), it is possible to exert an effect that the feeling of use such as touch after shaving can be enhanced. It was.

  Tranexamic acid can also be applied as a salt. Examples of tranexamic acid salts include, for example, metal salts such as magnesium salts, calcium salts, potassium salts; phosphates, hydrochlorides, hydrobromides, sulfates, etc., but are not limited thereto. is not.

  Although content of (A) component in the composition of this invention is not limited as long as a desired effect is exhibited, 0.1-2 mass% is preferable, and 0.5-2 mass% is more. preferable. From the viewpoint of exerting an anti-inflammatory effect, 0.1% by mass or more is preferable, and from the viewpoint of usability, 2% by mass or less is preferable.

(B) component (B) component in this specification is a carboxy vinyl polymer. A carboxy vinyl polymer is a water-soluble vinyl polymer having a carboxyl group. Specifically, commercially available products such as CARBOPOL940 manufactured by Lubrizol, Hibiswako 104 manufactured by Wako Pure Chemical Industries, and AQUPEC HV-505 manufactured by Sumitomo Seika Co., Ltd. can be used.

  When a carboxyvinyl polymer is used as a thickener, it is generally neutralized by using a base together. In this specification, you may neutralize using a base, or it can be used as a thickener by using (A) component, without using a base. In the present invention, when the gel-like composition is prepared using the component (A) and not neutralized with a base, the feel after shaving is more than when neutralized with a base. The skin becomes smooth and smooth and smooth. Such an improvement in feel after shaving can be further emphasized by using a component (D) described later in combination.

  The base used for neutralization is not limited, and examples thereof include organic compounds such as alkanolamine and basic amino acid, and inorganic compounds such as alkali metal hydroxide. 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. are mentioned.

  Although content of (B) component in the composition of this invention is not limited as long as a desired effect is exhibited, 0.1-1 mass% is preferable, and 0.3-1 mass% is more. preferable. From the viewpoint of forming a gel, 0.1% by mass or more is preferable, and from the viewpoint of preventing blade slippage due to excessive increase in the viscosity of the composition and further preventing clogging between the blades, 1% by mass or less is preferable. .

(C) component (C) component in this specification is a polyol. By applying the component (C) to the gel-like composition for shaving, an effect of improving the sliding of the blade during shaving and excellent skin feel after shaving is exhibited.

  The type of polyol is not limited as long as the desired effect is exhibited, but preferred examples include propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin and polyethylene glycol which is liquid at 25 ° C. be able to. Examples of polyethylene glycol that is liquid at 25 ° C. include PEG200, PEG300, PEG400, and PEG600. Such (C) component can use 1 type (s) or 2 or more types.

  1-20 mass% is preferable and, as for content of (C) component in the gel-like composition for shaving, 2-16 mass% is more preferable. 1% by mass or more is preferable from the viewpoint of imparting moisture and imparting an appropriate feeling of thickness at the time of application, and 20% by mass or less is preferable from the viewpoint of preventing excessive stickiness.

(D) component (D) component in this specification is a cationic polymer. By applying the component (D) to the gel-like composition for shaving, not only the viscosity is given to give a high-class feeling, but also an effect of giving an appropriate thickness feeling at the time of application is exhibited.
Preferable examples of the component (D) include an acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer (polyquaternium-39) and a dimethyldiallylammonium chloride / acrylamide copolymer (polyquaternium-7). These can be used alone or in combination of two or more. The component (D) can be easily obtained as a commercial product. Examples of the acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer include NALCO (Nalco) Marcote 3330 and dimethyldiallylammonium chloride / acrylamide copolymer. As a combination, Marcoat 550 made by Calgon is commercially available.

  Although content of (D) component in the composition of this invention is not limited as long as a desired effect is exhibited, 0.01-0.3 mass% is preferable, 0.05-0.2 The mass% is more preferable. 0.01 mass% or more is preferable from the viewpoint of imparting blade slipperiness during shaving and moisture to the skin, and 0.3 mass% or less is preferable from the viewpoint of washability after shaving.

Other Components In the present specification, for example, the following components that can be blended in cosmetics can be added to the gel composition for shaving of the present invention as necessary. For example, water, surfactants, oils and fats, hydrocarbon oils, waxes, higher fatty acids, fatty acid ester oils, higher alcohols, lower alcohols, sterols, humectants, inorganic pigments, dyes, antioxidants, UV absorbers, vitamins And astringents, whitening agents, animal and plant extracts, sequestering agents and the like. In addition to the above-described components, components usually used in cosmetics can be arbitrarily arbitrarily blended.

  The amount of water in the gel composition for shaving of the present invention is not particularly limited. For example, it preferably occupies 70 to 98% by mass, more preferably 75 to 95% by mass of the composition. .

  The mass ratio (A / B) between the component (A) and the component (B) in the gel composition for shaving of the present invention is not limited, but preferably satisfies A / B = 1 to 5. More preferably, 1.2 to 4 is satisfied. From the viewpoint of imparting viscosity as a gel, A / B is preferably 1 or more, and from the viewpoint of maintaining good skin after use, A / B is preferably 5 or less.

  The gel composition for shaving of the present invention can be produced by a conventional method. For example, when using a base for neutralization, the product of the present invention can be produced by adding the component (B) to a container containing an aqueous solution of the base and then sequentially adding the remaining components. Moreover, when the base for neutralization is not used, the product of the present invention is produced by mixing and thickening the components (A) and (B) and then sequentially adding the remaining components. Can do.

  The pH of the gel composition for shaving of the present invention is not particularly limited, but from the viewpoint of influence on the human body, for example, 4 to 8 is preferable and 5 to 8 is more preferable at 25 ° C. The pH of the skin cosmetic can be adjusted by adding an acid or alkali as appropriate.

  The gel-like composition for shaving of the present invention exhibits the effect of preventing dripping from the skin during application. This means that even in the presence of a salt derived from the skin or the like, the composition of the present invention is excellent in salt resistance without being reduced in viscosity.

  Hereinafter, the present invention will be described in more detail based on examples and the like, but the present invention is not limited only to such examples.

(1) Preparation of composition for shaving According to the composition described in Table 1, each composition of Examples 1-6 and Comparative Examples 1-4 was prepared, and it used for the following evaluation. In addition, the quantity of each component in a table | surface is the mass%.

(2) Evaluation of composition Evaluation of the composition for shaving prepared in each Example and each comparative example was performed as follows. For “sagging during application”, “blade sliding during shaving”, “clogging of a razor” and “feel after shaving”, the obtained composition is usually shaved using a razor. Twenty adult male panels were actually used and evaluated according to the following evaluation criteria. As a razor, a commercially available three-blade type was used.

<Properties of composition>
About the prepared composition for shaving, it discharged to the palm, and the property at the time of inclining the palm to about 45 degree | times confirmed visually. The state where the fluidity is low (not dripping immediately) was judged as “gel”, and the state where it was easy to flow (dripping immediately) was judged as “liquid”.

<Evaluation criteria for dripping during application>
◎ (Very good): More than 16 out of 20 responded that the composition for shaving does not sag when applied and is excellent in adhesion feeling ○ (Good): 11 to 15 out of 20 shave when applied △ (Unsatisfactory) if there is no sagging of the composition for application and excellent adhesion feeling: 6-10 out of 20 responded that the composition for shaving does not sag during application and is excellent in adhesion feeling × ( Defective): 5 or less of 20 respondents said that the composition for shaving did not sag during application and had excellent adhesion.

<Evaluation criteria for blade sliding during shaving>
◎ (very good): 16 or more of 20 people answered that razor blade sliding was good and could shave ◯ (good): 11-15 of 20 people had good razor blade sliding and shave Answered △ (insufficient): 6-10 out of 20 responded that razor blade sliding was good and deep shave was possible x (bad): 5 out of 20 razor blade sliding was good and deep Answer that you can shave

<Evaluation criteria for clogging of razor>
◎ (very good): 16 or more of 20 people answered that shaving composition can be deeply shaved without clogging the razor ○ (good): 11 to 15 of 20 people are shaving composition Answer that razor can be deeply shaved without clogging razor △ (insufficient): 6 to 10 out of 20 responded that shaving can be done without clogging the shaving composition × (bad): Less than 5 out of 20 responded that shaving compositions can be deeply shaved without clogging the razor

<Evaluation criteria for feel after shaving>
◎ (Very good): More than 16 out of 20 responded that there was no loss of razor such as congestion and tingling, and moist moisturization ○ (Good): 11 to 15 out of 20 were congested and tingling △ (Unsatisfactory): 6-10 out of 20 responded that there was no razor loss such as congestion or tingling, and that there was moist moisturization × ( Defective): Less than 5 out of 20 responded that there was no loss of razor, such as congestion or tingling, and there was moist moisture

(3) Results and discussion The results are shown in Table 1 below.

Details of each raw material in the table are as follows.
Carboxyvinyl polymer (manufactured by Lubrizol, trade name: CARBOPOL940)
Polyethylene glycol 200 (manufactured by Sanyo Chemical Industries, trade name: PEG-200, number average molecular weight: 200)
Polyethylene glycol 400 (manufactured by Sanyo Chemical Industries, trade name: PEG-400, number average molecular weight: 400)
Acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer (NALCO, trade name: Marcote 3330)
Dimethyldiallylammonium chloride / acrylamide copolymer (Calgon, trade name: Marquat 550, pure 8.6%)
Polyoxyethylene hydrogenated castor oil (100 EO) (manufactured by Nippon Emulsion Co., Ltd., trade name: EMALEX HC-100)
The polyethylene glycol 200 and the polyethylene glycol 400 were both liquid at 25 ° C.

  From the results shown in Table 1, each of the shaving compositions obtained in each example is in the form of a gel, the point of dripping at the time of application, the point of blade slipping at the time of shaving, clogging of the razor It turned out that it is superior to what was obtained by each comparative example in the point of the point and the point of the touch after shaving.

  The gel-like composition for shaving of the present invention can be used as a composition that can give a good feeling to the user by applying it at the time of shaving.

Claims (5)

  A gel-like composition for shaving comprising (A) tranexamic acid and / or a salt thereof, (B) a carboxyvinyl polymer, (C) a polyol, and (D) a cationic polymer.   The composition according to claim 1, wherein the component (C) is at least one selected from the group consisting of propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin and polyethylene glycol which is liquid at 25 ° C.   The composition according to claim 1 or 2, wherein the component (D) is an acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer and / or a dimethyldiallylammonium chloride / acrylamide copolymer. The composition according to any one of claims 1 to 3, wherein the components (A) to (D) in the composition satisfy the following contents:
(A) component: 0.1-2 mass%
(B) component: 0.1-1 mass%
(C) component: 1-20 mass%
(D) component: 0.01-0.3 mass%.   The mass ratio (A / B) of the component (A) and the component (B) contained in the composition satisfies A / B = 1 to 5, according to any one of claims 1 to 4. Composition.