JP5436929B2 - Eyelash cosmetic - Google Patents

Description

  The present invention relates to a cosmetic for eyelashes.

  In mascara, both makeup durability and cleansing properties are required to be cleansed with warm water while having water resistance. As such mascara, for example, a cosmetic composition (Patent Document 1) containing an aqueous dispersion of polyurethane and a semi-crystalline polymer, or an aqueous dispersion of polyurethane and sodium = N-octadecyl phthalate is contained. A cosmetic composition (Patent Document 2) has been proposed.

JP 2003-26539 A JP 2003-137732 A

  However, these mascaras need to contain a large amount of a film-forming polymer such as polyurethane in order to achieve both makeup sustainability and cleansing properties, and the wax content cannot be increased (see Patent Document 1). In the example, no wax was contained, and in Patent Document 2, only 6% by mass was contained), resulting in a problem that the effect of producing the volume was insufficient. In addition, when the wax is contained, there is a problem that the effect of achieving both makeup sustainability and cleansing properties is not sufficient.

  The subject of this invention is providing the cosmetics for eyelashes with the high effect of producing a volume feeling simultaneously, making compatible makeup sustainability and cleansing property.

  The present inventor has found that by combining a specific organic compound and a specific film-forming polymer, a cosmetic for eyelashes can be obtained that has both a long-lasting cosmetic effect and a cleansing property while at the same time providing a high volume effect. It was.

The present invention includes the following components (A) and (B):
(A) one or more organic compounds selected from adipic acid ester, succinic acid ester, citric acid ester, polypropylene glycol and aromatic alcohol,
(B) (meth) acrylic acid- (meth) acrylic acid ester copolymer aqueous dispersion, the monomer constituting the copolymer being (meth) acrylic acid 0.01-20% by mass, carbon number (Meth) acrylic acid ester having 1 to 4 alkyl groups is 15 to 99.9% by mass, and (meth) acrylic acid ester having 5 to 22 carbon atoms is 0 to 40% by mass. An eyelash cosmetic containing an aqueous dispersion having an SP value of 9.9 to 11.4 is provided.

  The cosmetic for eyelashes of the present invention has a high effect of producing a sense of volume while at the same time achieving both excellent makeup sustainability and cleansing properties.

  Among the organic compounds of component (A) used in the present invention, the adipic acid ester is preferably an ester of adipic acid and a linear or branched alcohol having 1 to 8 carbon atoms, such as dimethyl adipate or diethyl adipate. , Dipropyl adipate, diisopropyl adipate, dibutyl adipate, diisobutyl adipate and the like. In particular, diisopropyl adipate is preferable in terms of both makeup sustainability and cleansing properties.

  The succinic acid ester of component (A) is preferably an ester of succinic acid and a linear or branched alcohol having 1 to 8 carbon atoms, such as dimethyl succinate, diethyl succinate, dipropyl succinate, diisopropyl succinate, Examples thereof include dibutyl succinate, diisobutyl succinate, diamyl succinate and the like. In particular, dibutyl succinate is preferable in terms of both makeup sustainability and cleansing properties.

  The citrate ester of component (A) is preferably an ester of citric acid and a linear or branched alcohol having 1 to 8 carbon atoms, and the hydroxyl group of citric acid is linear or branched having 1 to 8 carbon atoms even if it is unsubstituted. It may be esterified with a chain fatty acid. Examples of the citrate ester include acetyl triethyl citrate, acetyl tripropyl citrate, acetyl tributyl citrate, acetyl tripentyl citrate, triethyl citrate, tributyl citrate, triamyl citrate, trihexyl citrate, and tris citrate. (2-ethylhexyl) and the like. In particular, acetyl tributyl citrate is preferable in terms of both makeup sustainability and cleansing properties.

  The component (A) polypropylene glycol preferably has a number average degree of polymerization of 2 to 52, and a number average degree of polymerization of 3 to 34, in particular, a number average degree of polymerization of 5 to 17 satisfies both makeup sustainability and cleansing properties. This is more preferable. One or both ends of the polypropylene glycol may be capped with an alcohol or fatty acid having 1 to 8 carbon atoms. Preferred polypropylene glycols have a degree of polymerization of 2, 3, 7, 10, 12 or the like. In particular, a polypropylene glycol having a degree of polymerization of 7 is preferable in terms of both makeup sustainability and cleansing properties.

  Examples of the aromatic alcohol of component (A) include benzyl alcohol, benzyloxyethanol, phenoxyethanol, and the like. In particular, benzyl alcohol is preferred in terms of both makeup sustainability and cleansing properties.

  One or more organic compounds of component (A) can be used, and 0.05 to 10% by mass, particularly 0.2 to 2% by mass in the total composition is a cosmetic lasting and cleansing property. This is preferable because of excellent compatibility.

  The copolymer of the component (B) used by this invention is (meth) acrylic acid ester 15- which the monomer which comprises (meth) acrylic acid 0.01-20 mass% and a C1-C4 alkyl group. 99.9 mass%, (meth) acrylic acid ester having an alkyl group having 5 to 22 carbon atoms, 0 to 40 mass%, preferably (meth) acrylic acid 0.01 to 15 mass%, carbon number 1 to The (meth) acrylic acid ester having 4 alkyl groups is 25 to 80% by mass, and the (meth) acrylic acid ester having 5 to 22 carbon atoms is 10 to 40% by mass. Such a ratio is preferable in terms of both makeup sustainability and cleansing properties.

  Part or all of the (meth) acrylic acid of the component (B) copolymer may be neutralized. The base used for neutralization may be any base that is commonly used in cosmetics, and examples thereof include alkali metal hydroxides such as sodium and potassium; amines such as ammonia and ethanolamine.

  The copolymer of component (B) may be copolymerized with a vinyl monomer other than (meth) acrylic acid (ester) as long as the effects of the present invention are maintained. Such monomers include styrene monomers, alkyl (meth) acrylamide monomers, vinyl acetate, vinyl pyrrolidone, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, PEG (meth) acrylate, dimethylacrylamide, and t-butylacrylamide. Styrene sulfonic acid, acrylamide-2-methylpropane sulfonic acid, dimethylaminopropyl acrylamide, diethylaminoethyl methacrylate and the like.

  The SP value of the copolymer of the component (B) is such that the SP value calculated by the Fedor method is in the range of 9.9 to 11.4, and more preferably in the range of 10.1 to 10.5. If the SP value is less than 9.9, sufficient hot water washability cannot be obtained, and if it exceeds 11.4, the water resistance tends to be inferior.

  The copolymer of component (B) preferably has a glass transition temperature (Tg) calculated by the Fox formula of -50 to 20 ° C, particularly preferably -40 to 10 ° C. When Tg is in this range, both hot water washability and water resistance can be achieved at a high level.

  The aqueous dispersion of the component (B) copolymer can be synthesized by an ordinary method such as an emulsion polymerization method or a soap-free emulsion polymerization method. Further, after obtaining a polymer by a known method such as solution polymerization, a dispersion can also be obtained by an existing technique such as a phase inversion emulsification method or a solvent distillation method.

One or more types of the aqueous dispersion of the copolymer of the component (B) can be used, and it is preferable to contain 0.5 to 25% by mass as the solid content of the copolymer in the entire composition. More preferably, the content is more preferably 1.5 to 15% by mass, and particularly preferably 2 to 10% by mass.
Furthermore, the mass ratio of the component (A) and the component (B) is preferably (A) / (B) = 1/100 to 35/100, more preferably 3/100 to 25/100. Particularly preferred is 5/100 to 20/100. By making the mass proportions of the components (A) and (B) within this range, it is preferable because high makeup sustainability and cleansing properties can be obtained at the same time.

The cosmetic of the present invention preferably further contains a solid fat (wax) that is usually used in cosmetics.
Solid fat (wax) refers to those having a melting point of 40 ° C. or higher and water-insoluble. In particular, those having a melting point of 60 to 110 ° C. are preferred, and animal waxes, vegetable waxes, mineral waxes, synthetic waxes and the like can be used. Specific examples include rice bran wax, carnauba wax, candelilla wax, sunflower seed wax, beeswax, ceresin, paraffin wax, microcrystalline wax, polyethylene wax, silicone wax, hydrogenated jojoba oil, and the like.

  One or more kinds of solid fats (waxes) can be used, and the content of 2 to 50% by mass in the total composition is preferable because the effect of producing a volume feeling is high, and 5 to 40% by mass, particularly 7 to 40%. More preferably, it is contained in an amount of 10 to 30% by mass. By setting the solid fat to 2% by mass or more, particularly 7% by mass or more, it is possible to obtain a high volume feeling while maintaining warm water washability and water resistance. If it exceeds 50 mass%, lumps are likely to occur during use, which is not preferable in terms of finish.

The cosmetic of the present invention further comprises components usually used in cosmetics, for example, PMMA, nylon powder, spherical powder such as silica; white pigment, organic pigment, inorganic pigment, iron oxide, mica titanium and other pigment powder; In order to increase the long rush effect, powders such as bentonite, talc and kaolin can be contained.
Various powders are used that have been surface-treated with silicone, higher fatty acid, higher alcohol, fatty acid ester, metal soap, amino acid, alkylsilane, acrylic silicone, fluorine compound, or those encapsulated in organic or inorganic microcapsules. be able to.
1 or more types can be used for powder, and it is preferable to contain 1-10 mass% in the whole composition.

  Moreover, the cosmetics of this invention can contain various surfactant. As the surfactant, an anionic surfactant, a cationic surfactant, a nonionic surfactant, an amphoteric surfactant and the like can be used alone or in combination.

The cosmetic of the present invention can contain a water-soluble solvent, a film agent, an inorganic salt, an ultraviolet absorber, an ultraviolet scattering agent, a humectant, a pigment, a fragrance, an antioxidant, a sequestering agent, and the like.
Examples of the water-soluble solvent include lower alcohols having 1 to 4 carbon atoms; ethers such as ethylene glycol monoethyl ether and diethylene glycol diethyl ether; carbonate esters such as ethylene carbonate and propylene carbonate.
Examples of the film agent include water-soluble polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, carboxymethyl cellulose, and starch.

  The cosmetic of the present invention can be made into a water-in-oil type, an oil-in-water type, or a composite emulsion type formulation such as O / W / O. An oil-in-water emulsion-dispersion type formulation containing water and / or an aqueous solvent as a continuous phase is preferred in terms of stability and usability.

The cosmetic of the present invention can be produced by uniformly mixing and stirring each component according to a normal method.
The cosmetic of the present invention has a viscosity of 100 to 2,000,000 mPa · s, particularly 150,000 to 1,000,000 mPa · s in a B-type viscometer (type B8R, Toki Sangyo Co., Ltd.) at 25 ° C. when applied to eyelashes. The adhesion to the object is improved, the drying speed is fast, and the finish can be improved.

  The cosmetic for eyelashes of the present invention is an applicator usually used for mascara, for example, a brush in which fibers are twisted with a wire, an applicator having a comb shape, a coil shape, etc., a resin molded brush formed into a brush shape using a resin, etc. Can be applied.

In the following examples, Example 5 and Examples 13 to 23 are reference examples and are not included in the scope of the present invention.
Examples 1-4 and Comparative Examples 1-4
A mascara composition having the composition shown in Table 1 was produced, and the water resistance of the mascara film, the cleansing property of the mascara film, the makeup persistence, the cleansing property, and the volume feeling were evaluated. The results are also shown in Table 1.

(Production method)
The oil phase component stirred and melted at 95 ° C is added to the aqueous phase component that has been uniformly dissolved at 85 ° C in advance, and cooled to room temperature while stirring, and then component (A), component (B) and balance are added. Purified water was added and stirred. Then, the aqueous mascara composition was obtained by deaeration.

(Evaluation method)
(1) Water resistance of mascara film:
Each mascara was applied in a circle with a diameter of 3 cm on a PET plate (5 × 5 cm) and dried in an environment of 25 ° C. and 65% for 24 hours to form a film having a thickness of 100 μm.
The plate was set on a friction tester manufactured by Shinto Kagaku Co., Ltd., and water (20 ° C.) was dropped at 0.5 to 1 mL / second, while a 10 mm diameter stainless steel ball sensor, load 50 g, stroke 2 cm, The number of times until the film was peeled off by repeated rubbing at a speed of 60 times / minute was measured. In order to prevent the plate from being immersed in water, a base having a height of 1 cm was fixed to the bat and set on the base.

(2) Cleansing properties of mascara film:
Each mascara was applied in a circle with a diameter of 3 cm on a PET plate (5 × 5 cm) and dried in an environment of 25 ° C. and 65% for 24 hours to form a film having a thickness of 100 μm.
The plate was set on a friction tester manufactured by Shinto Kagaku Co., Ltd., and hot water (40 ° C.) was dropped at 0.5 to 1 mL / second, while a 10 mm diameter stainless steel ball sensor, load 50 g, stroke 2 cm, The number of times until the film was peeled off by repeated rubbing at a speed of 60 times / minute was measured. In order to prevent the plate from being immersed in water, a base having a height of 1 cm was fixed to the bat and set on the base.

(3) Makeup durability:
The state after 6 hours from the application of each mascara was evaluated by 20 female monitors, and was determined by the number of people evaluated as having excellent makeup sustainability.

(4) Cleansing properties:
After 6 hours from the application of each mascara, a hot water washing test was conducted by 20 female monitors, and the number of people evaluated as having excellent cleansing properties was determined. In the warm water washing test, lukewarm water (38 to 40 ° C.) was applied to the eyelashes and washed with a method of washing away.

(5) Volume feeling:
About the state immediately after apply | coating each mascara, it evaluated by 20 female monitors, and determined by the number of persons evaluated that it was excellent in the volume-up effect.

  From the results shown in Table 1, all of the mascara compositions of the present invention were excellent in sustainability, cleansing properties, and volume-up effect. On the other hand, the mascara composition which does not contain a component (A) or a component (B) was not able to satisfy | fill all of these performance simultaneously.

Examples 5-23
In the same manner as in Examples 1 to 4, mascara compositions having the compositions shown in Tables 2 to 3 were produced, and the water resistance of the mascara film, the cleansing property of the mascara film, the makeup persistence, the cleansing property, and the volume feeling were evaluated. . The results are shown in Tables 2 to 4.

Claims (5)

The following components (A) and (B);
(A) Diisopropyl adipate
(B) (meth) acrylic acid- (meth) acrylic acid ester copolymer aqueous dispersion, the monomer constituting the copolymer being (meth) acrylic acid 0.01-20% by mass, carbon number (Meth) acrylic acid ester having 1 to 4 alkyl groups is 15 to 99.9% by mass, and (meth) acrylic acid ester having 5 to 22 carbon atoms is 0 to 40% by mass. An aqueous dispersion having an SP value of 9.9 to 11.4 is contained , and the mass ratio of the component (A) and the component (B) is (A) / (B) = 5/100 to 35/100. Cosmetics for eyelashes.   The cosmetic for eyelashes according to claim 1, comprising 0.05 to 10% by mass of the component (A) in the total composition.   The cosmetic for eyelashes according to claim 1 or 2, wherein component (B) is contained in an overall composition in an amount of 0.5 to 25% by mass as a solid content of the copolymer. Furthermore, (C) Cosmetics for eyelashes of any one of Claims 1-3 containing solid fat. The cosmetic for eyelashes according to claim 4 , wherein the component (C) is contained in an amount of 2 to 50 mass% in the entire composition.