JP2014159386A - Eyelash cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emulsification type eyelash cosmetic (mascara) capable of suppressing a clog in a comb without reducing curling power, giving good voluminous feeling and smooth use feeling, and also being taken off with hot water.SOLUTION: An eyelash cosmetic contains (a) 20 to 30 mass% of an alkyl acrylate copolymer emulsion, (b) 3 to 6 mass% of a humectant, and (c) 0.1 to 0.4 mass% of a polyacrylate salt. In addition, (d) 0.5 to 6 mass% of a water-soluble substance is preferably contained.

Description

  The present invention relates to eyelash cosmetics. In particular, the present invention relates to an emulsification type mascara composition suitable for use in a comb-type applicator, which is excellent in curling power and feeling of use and can be removed with hot water.

  Mascara is a major eye makeup cosmetic that can make the eyes look impressive by making the eyelashes thick and long or curled. There are two types of mascara: an oily type in which wax, resin, color material and the like are dispersed in volatile oil, and an emulsion type in which resin and color material are emulsified and dispersed in an aqueous component.

The oily type mascara can firmly adjust the shape of the eyelashes by a film formed after volatilization of the solvent, but in order to remove the film, a remover (removal solution) mainly composed of a solvent is required.
On the other hand, the oil-in-water emulsification type is popular because it is water-resistant, and mascara that can be easily removed with hot water without using a remover has been sold. For example, Patent Document 1 describes an emulsion type eyelash cosmetic containing polyvinyl alcohol, a polymer containing alkyl (meth) acrylate as a structural unit, and a copolymer containing N-vinylpyrrolidone. It is said that it can be easily removed even with water while having a long-lasting cosmetic effect (including water resistance against sweat).

  In an oil-in-water emulsified mascara, a resin emulsion containing an acrylic monomer as a main component is generally blended as a film-forming component and dried after application to form a water-resistant film. In mascara that can be easily removed with hot water (or water), a water-soluble substance such as a water-soluble polymer is further blended. In this case, the water-soluble substance is sealed in the resin film, so that it contacts the hot water. By doing so, it is considered that the resin film swells and loosens and becomes easy to peel off from the eyelashes.

The mascara is usually applied to the eyelashes using a brush-type or comb-type applicator (see, for example, Patent Document 2). In the brush type applicator, the mascara liquid is delicately entangled with each of the eyelashes and gives a soft feeling, and the brush type applicator is used for the conventional emulsification type mascara.
Comb-type applicators, on the other hand, comb the eyelashes from the root, giving them a lustrous length and volume, providing a good feeling of liquid and volume, and a feeling of separation like combing the eyelashes with a comb. It has the feature that it is.

JP 2006-257052 A International Publication No. WO2009 / 084343

However, when using a comb-type applicator on a conventional oil-in-water emulsified mascara to obtain a volume or separate feeling, the comb may become clogged if left for only a few minutes after application. was there.
By reducing the amount of the resin emulsion blended in the mascara, clogging is suppressed to some extent, but sufficient curling force cannot be obtained. On the other hand, clogging can be suppressed by maintaining the curling force without changing the amount of the resin emulsion and increasing the amount of the moisturizing agent, but there is a problem in usability that drying after application is delayed.
Further, although the clogging is reduced by widening the comb tooth interval (pitch) of the comb-type applicator, it is difficult to obtain the separation effect that is characteristic of the comb-type applicator.

  Therefore, the present invention is an emulsified eyelash cosmetic (mascara) suitable for use in a comb-type applicator, which can suppress the clogging of the comb without reducing the curling power, and has a good volume feeling and smoothness. An object of the present invention is to provide a cosmetic for eyelashes that has a good feeling of use and can be removed with hot water.

  In order to solve the above-mentioned problems, the present inventors have conducted intensive research. As a result, they contain a resin emulsion and can be used in a comb-type applicator by blending polyacrylate with an emulsified mascara that can be removed with hot water. However, it was found that the eyelash makeup with the volume and separation feeling characteristic of the comb type can be realized without causing clogging, and the present invention has been completed.

That is, the present invention
(A) 20-30% by weight alkyl acrylate copolymer emulsion,
(B) 3-6% by weight of a humectant, and (c) 0.1-0.4% by weight of a polyacrylate.
The eyelash cosmetics characterized by containing this.

  The cosmetic for eyelashes of the present invention contains a predetermined amount of a humectant and a polyacrylate while containing a sufficient amount of an alkyl acrylate copolymer emulsion to exhibit an excellent eyelash curling power. Therefore, the comb type applicator is not clogged. Furthermore, it can dry quickly with a smooth feeling of use, can give a good volume feeling to the eyelashes, and can be easily washed off with hot water.

Hereinafter, the present invention will be described in detail.
(A) Alkyl Acrylate Copolymer Emulsion The alkyl acrylate copolymer emulsion (component a) used in the present invention is an emulsion of a copolymer mainly composed of an alkyl ester of acrylic acid or methacrylic acid. It may be an emulsion of methyl acid, a copolymer consisting of 2-ethylhexyl acrylate and methacrylic acid, a copolymer consisting of methacrylic acid, butyl acrylate and 2-ethylhexyl acrylate, an alkyl acrylate / styrene copolymer, etc. The emulsion with the designation “acrylic acid / alkyl acrylate copolymer” is preferred.

The alkyl acrylate copolymer constituting the emulsion is not particularly limited, but a polymer having a glass transition point of −20 ° C. to 100 ° C., preferably −5 ° C. to 70 ° C. is preferably used. The emulsion may contain only one type of alkyl acrylate copolymer or two or more different alkyl acrylate copolymers.
The actual content of the alkyl acrylate copolymer (resin) in the emulsion is not particularly limited, but is usually about 20 to 70% by mass, preferably about 40 to 60% by mass of the emulsion.

  In the present invention, commercially available products can be used as the alkyl acrylate copolymer emulsion. For example, iodosol GH34F, iodosol GH810 (manufactured by Akzo Nobel Co., Ltd.), Daitozol 5000A-S (manufactured by Daito Kasei Kogyo Co., Ltd.) Dash coat CG-1 (manufactured by Daito Kasei Kogyo Co., Ltd.) can be given as a representative example.

  The blending amount of the alkyl acrylate copolymer emulsion in the cosmetic of the present invention is 20 to 30% by mass, preferably 22 to 28% by mass, and the actual content of the alkyl acrylate copolymer resin is 5 to 15% by mass. %, Preferably 8 to 12% by mass.

(B) Moisturizing agent The moisturizing agent (component b) blended in the cosmetic of the present invention may be one that is usually blended in cosmetics or the like, and is not particularly limited.
Examples include dipropylene glycol, propylene glycol, 1,3-butylene glycol, polyethylene glycol 400, glycerin and the like.

  The blending amount of the humectant (component b) in the cosmetic of the present invention is such that the ratio of the blending amount of the alkyl acrylate copolymer emulsion (component a) is a: b = 1: 3 to 1: 8, preferably Adjust to 1: 4 to 1: 7, more preferably about 1: 5. The specific blending amount is 3 to 6% by mass, preferably 4 to 6% by mass. When the blending amount of the humectant is less than 3% by mass, comb clogging tends to occur, and when the blending amount exceeds 6% by mass, drying after application tends to be slow and usability tends to deteriorate.

(C) Polyacrylic acid salt The polyacrylic acid salt (component c) used in the present invention is a salt of polyacrylic acid that can be blended as a water-soluble thickener in cosmetics or quasi-drugs, such as sodium salt, Alkali metal salts such as potassium salts or ammonium salts. The molecular weight of polyacrylic acid is not particularly limited, but those having a molecular weight of about 1 million to 6 million are preferably used.

  The polyacrylic acid used in the present invention may be a commercial product. For example, as a completely neutralized product (sodium salt), Aronbis SX (molecular weight 4 million to 5 million), Aronbis MX (molecular weight 2 million to 3 million) ) And the like, and as the partially neutralized product, Aronbis AHX and the like are mentioned (both manufactured by Toagosei Co., Ltd.)

  The compounding quantity of the polyacrylic acid in the cosmetics of this invention is 0.1-0.4 mass%, Preferably it is 0.15-0.3 mass%. When the blending amount of the polyacrylate is less than 0.1% by mass, the clogging of the comb is likely to occur, and when the blending amount exceeds 0.4% by mass, the drying after application tends to be delayed and the usability is deteriorated. There is.

The eyelash cosmetic of the present invention is a type of cosmetic that can be washed off with hot water. In addition to the essential components (ac), (d) a water-soluble substance such as a water-soluble polymer (other than polyacrylic acid). Can be blended.
Examples of water-soluble polymers include synthetic water-soluble polymers such as polyvinyl alcohol (PVA), gum arabic, gum tragacanth, galactan, guar gum, carob gum, caraya gum, carrageenan, pectin, kanten, quince seed (malmello), and alge colloid (gasso extract). , Starch (rice, corn, potato, wheat), glycyrrhizic acid, xanthan gum, dextran, succinoglucan, bullulan, collagen, casein, albumin, gelatin and other natural water-soluble polymers, carboxymethyl starch, methylhydroxypropyl starch, alginic acid And semi-synthetic water-soluble polymers such as sodium and propylene glycol alginate.
The amount of the water-soluble substance is preferably 0.5 to 6% by mass, more preferably 1 to 5% by mass. If the blending amount exceeds 6% by mass, drying after coating is slow and usability is reduced.

  Furthermore, other optional components that can be usually blended in eyelash cosmetics, particularly mascara, can be contained within a range that does not impair the effects of the present invention. Specific examples include powder components, liquid fats and oils, solid fats and oils, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, ester oils, silicone oils, anionic surfactants, cationic surfactants, amphoteric surfactants, lipophilicity. Nonionic surfactants, hydrophilic nonionic surfactants, thickeners, sequestering agents, lower alcohols, buffers, antioxidants, preservatives, anti-inflammatory agents, various extracts, activators, etc. However, it is not limited to these.

  The eyelash cosmetic of the present invention can be produced according to a method usually used for emulsified mascara. Briefly, the oil phase component is heated to about 90 ° C. and uniformly mixed to form oil phase A, and the water phase component and the resin emulsion are uniformly mixed at room temperature to form water phase B, and oil phase A is stirred. The aqueous phase B can be added and emulsified while being cooled to room temperature.

The eyelash cosmetic of the present invention is particularly suitable for application using a comb-type applicator.
The comb-type applicator generally has a shaft portion such as a columnar shape or a polygonal column shape, and includes a grip portion at one end of the shaft portion and a comb portion at the other end. The comb portion has a shape in which a plurality of protruding pieces (comb teeth) are arranged perpendicular to the shaft portion (see, for example, FIG. 4 of Patent Document 2 and FIG. 2 of Japanese Patent Laid-Open No. 2011-4084).

The eyelash cosmetic of the present invention can achieve a volume feeling and a separate feeling that are difficult to obtain with a conventional emulsification type eyelash cosmetic (mascara), particularly by applying a comb-type applicator. Comb clogging can be suppressed without reducing the curling force.
Therefore, this invention also provides the eyelash cosmetics kit containing the eyelash cosmetic which concerns on this invention, the container which accommodates the said cosmetics, and a comb type applicator.

  Hereinafter, the present invention will be described in more detail with reference to specific examples, but these do not limit the technical scope of the present invention. In addition, the compounding quantity in a following example etc. is the mass% unless it mentions specially.

An emulsified mascara composition was prepared with the composition described in each example of Tables 1 to 4 below.
The mascara composition obtained in each example was subjected to an actual use test using a comb-type applicator by 10 professional panels. Specifically, the mascara composition of each example was applied to the eyelashes of each panel, and the curling power of the eyelashes, the goodness with liquid (volume feeling), the smoothness, and the speed of drying on the eyelashes according to the following criteria: evaluated.

<Evaluation criteria>
(1) About “curl strength”, “goodness with liquid (volume feeling)” and “smoothness” ◎: Seven or more out of ten people evaluated it as excellent.
○: 5 or more but less than 7 out of 10 people evaluated as excellent △: 3 or more but less than 5 out of 10 people evaluated as excellent ×: 2 people evaluated as excellent Less than

(2) “Drying speed” ○: Drying at an appropriate speed makes it easy to use. △ (Fast): Drying after application is fast and difficult to use. △ (Slow): Drying after application is slow. X (slow): Drying after application is too slow to be used as a product

Next, clogging after leaving the comb-type applicator used for applying the mascara composition of each example at room temperature was evaluated according to the following criteria.
<Evaluation criteria>
○: It could be reused as it was without clogging.
Δ: Clogging occurred, but could be removed by simple treatment.
X: Clogging occurred and reuse was not possible.

  From the results shown in Table 1, all the evaluated items were satisfied by blending predetermined amounts of alkyl acrylate copolymer emulsion (component a), humectant (component b) and polyacrylate (component c). Possible results were obtained (Examples 1-3). Moreover, the composition of Example 3 which does not mix | blend PVA which was mix | blended with the mascara which can be dropped with the conventional hot water was also able to be easily dropped with hot water by containing polyacrylate. However, when the blending amount of the polyacrylate exceeds 0.4% by mass, drying after coating is delayed and usability is reduced (Comparative Example 1).

  When polyacrylate is not blended, clogging can be prevented by reducing the blending amount of the alkyl acrylate copolymer from Comparative Example 3 corresponding to the conventional emulsified type mascara, but sufficient curling power cannot be obtained (Comparison Example 2) On the contrary, when the amount of the alkyl acrylate copolymer is increased, the curling force is improved, but clogging is likely to occur, the coating is dried too quickly, lacks smoothness, and is not usable. It decreased (Comparative Examples 4 and 5). Further, in all the examples in Table 2, an excellent volume feeling was not obtained.

  When polyacrylate is not blended, clogging can be prevented by increasing the amount of moisturizing agent compared to the conventional (Comparative Example 3), but drying after application becomes extremely slow (Comparative Examples 6 and 7). Even when the blending amount of the alkyl acrylate copolymer was increased while suppressing the blending amount, an excellent volume feeling was not obtained (Comparative Examples 8 and 9).

  When no polyacrylate was added, clogging could be prevented by increasing the amount of water-soluble polymer (PVA) compared to the conventional (Comparative Example 3), but drying after coating was delayed and sufficient curling power was achieved. Was not obtained (Comparative Examples 10 and 11).

The blending amount of the humectant (component b) in the cosmetic of the present invention is such that the ratio of the blending amount of the alkyl acrylate copolymer emulsion (component a ) is b: a = 1: 3 to 1: 8, preferably Adjust to 1: 4 to 1: 7, more preferably about 1: 5. The specific blending amount is 3 to 6% by mass, preferably 4 to 6% by mass. When the blending amount of the humectant is less than 3% by mass, comb clogging tends to occur, and when the blending amount exceeds 6% by mass, drying after application tends to be slow and usability tends to deteriorate.

(C) Polyacrylic acid salt The polyacrylic acid salt (component c) used in the present invention is a salt of polyacrylic acid that can be blended as a water-soluble thickener in cosmetics or quasi-drugs, such as sodium salt, Alkali metal salts such as potassium salts or ammonium salts. The molecular weight of the polyacrylic acid salt is not particularly limited, preferably those having a molecular weight of about one million to 6 million is used.

Polyacrylic acid salt used in the present invention may be commercially available, for example, as a complete neutralization product (sodium salt), Aronbisu SX (molecular weight 4,000,000-5000000), Aronbisu MX (molecular weight 2000000-300 As the partially neutralized product, Aronbis AHX and the like can be mentioned (all manufactured by Toagosei Co., Ltd.).

The amount of polyacrylic acid salts in the cosmetic of the present invention, 0.1 to 0.4 wt%, preferably from 0.15 to 0.3 wt%. When the blending amount of the polyacrylate is less than 0.1% by mass, the clogging of the comb is likely to occur, and when the blending amount exceeds 0.4% by mass, the drying after application tends to be delayed and the usability is deteriorated. There is.

Eyelash cosmetic of the present invention is the type of cosmetic washed out with hot water, in addition to the above essential components (a to c), water-soluble, such as (d) water-soluble polymers (other than the polyacrylic acid salt) Substances can be blended.
Examples of water-soluble polymers include synthetic water-soluble polymers such as polyvinyl alcohol (PVA), gum arabic, gum tragacanth, galactan, guar gum, carob gum, caraya gum, carrageenan, pectin, kanten, quince seed (malmello), and alge colloid (gasso extract). , Starch (rice, corn, potato, wheat), glycyrrhizic acid, xanthan gum, dextran, succinoglucan, bullulan, collagen, casein, albumin, gelatin and other natural water-soluble polymers, carboxymethyl starch, methylhydroxypropyl starch, alginic acid And semi-synthetic water-soluble polymers such as sodium and propylene glycol alginate.
The amount of the water-soluble substance is preferably 0.5 to 6% by mass, more preferably 1 to 5% by mass. If the blending amount exceeds 6% by mass, drying after coating is slow and usability is reduced.

The eyelash cosmetic of the present invention is particularly suitable for application using a comb-type applicator.
The comb-type applicator generally has a shaft portion such as a columnar shape or a polygonal column shape, and includes a grip portion at one end of the shaft portion and a comb portion at the other end. Comb portion has a shape arranged plural protruding pieces (the comb teeth) perpendicular to the shaft portion (e.g., see Patent Document 2 in FIG. 4, FIG. 2, etc. of JP-2011-4 80 4 No. ).

The eyelash cosmetic of the present invention can achieve a volume feeling and a separate feeling that are difficult to obtain with a conventional emulsification type eyelash cosmetic (mascara), particularly by applying a comb-type applicator. Comb clogging can be suppressed without reducing the curling force.
Thus, the present invention is, eyelash cosmetic of the present invention, a container for containing the cosmetic, and also eyelash cosmetic kit comprising a comb-type applicator provided.

Claims (6)

(A) 20-30% by weight alkyl acrylate copolymer emulsion,
(B) 3-6% by weight of a humectant, and (c) 0.1-0.4% by weight of a polyacrylate.
The eyelash cosmetics characterized by containing this. (D) The eyelash cosmetic according to claim 1, further comprising 0.5 to 6% by mass of a water-soluble substance. The cosmetic for eyelashes according to claim 1 or 2, wherein the alkyl acrylate copolymer emulsion contains 5 to 15% by mass of an alkyl acrylate copolymer resin as a real component. The humectant is one or more selected from the group consisting of dipropylene glycol, propylene glycol, 1,3-butylene glycol, polyethylene glycol 400, and glycerin. Cosmetics for eyelashes as described in clause. The cosmetic for eyelashes as described in any one of Claim 1 to 4 whose said polyacrylate is sodium polyacrylate. A cosmetic kit for eyelashes comprising the cosmetic for eyelashes according to any one of claims 1 to 5, a container for storing the cosmetic, and a comb-type applicator.