JP6474602B2 - Oily cosmetics - Google Patents

Description

  The present invention relates to an oily cosmetic.

In makeup cosmetics, it is known that an excellent gloss can be obtained by dissolving an oil-soluble polymer in an oil agent.
For example, Patent Document 1 discloses a makeup containing an oil-soluble polymer containing a methacrylate having an alkyl group having 12 to 22 carbon atoms in the molecule and a hydrophobic vinyl group-containing monomer as a constituent unit, and an unsaturated fatty acid ester oil. Patent Document 2 describes that makeup cosmetics containing the same oil-soluble polymer and methylphenylpolysiloxane are glossy and moisturizing. It describes that it is excellent in effect and its sustainability. Patent Document 3 describes that makeup cosmetics containing the same oil-soluble polymer and polyethylene or a copolymer thereof are less likely to reduce the gloss of appearance, and Patent Document 4 describes a similar oil-soluble polymer. It is described that a makeup cosmetic containing a soluble polymer, a hydrogenated polyisobutene and a fatty acid ester of a polysaccharide has a high gloss, is not sticky, and hardly causes stringing.

JP 2007-277173 A JP 2007-277174 A JP 2007-277175 A JP 2007-277176 A

  The present inventor has found that cosmetics in which an oil-soluble polymer is dissolved in wax-containing ester oil have poor luster at low temperatures, and the cosmetics become soft during storage and adhere excessively when applied. In addition, it was found that there is a problem that it cannot be applied well because it is easy to get uneven.

  The inventor of the present invention contains a copolymer containing a specific poorly oil-soluble monomer as a constituent unit in an oily cosmetic containing a wax and an ester oil that is a source of unevenness, thereby converting the copolymer into a wax. It has been found that it can be adsorbed to improve the wax dispersibility at low temperatures, is excellent in gloss at low temperatures, suppresses the softening of the cosmetic during storage, and can be applied at any time.

The present invention includes the following components (A), (B) and (C):
(A) A copolymer comprising the structural unit (a) represented by the general formula (1) and the structural unit (b) represented by the general formula (2),
0.1-10% by mass of a copolymer containing 70% by mass to 97% by mass of the structural unit (b) in the copolymer,

Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, and R ⁷ has 2 to 4 carbon atoms. Represents an alkylene group, R ⁸ represents a linear alkyl group or alkenyl group having 14 to 26 carbon atoms, X ¹ represents OM or NHC (CH ₃ ) ₂ CH ₂ SO ₃ M (M represents a hydrogen atom or a cation group). X ² represents an oxygen atom or NH, and n represents an integer of 0 to 3).
(B) 7-25% by mass of a wax solid at 25 ° C.
(C) 5 to 75% by mass of ester oil which is liquid at 25 ° C.
The present invention relates to an oily cosmetic containing

  The oily cosmetic of the present invention has good appearance color development and excellent gloss when applied, particularly at low temperature (5 ° C.). In addition, the cosmetics are difficult to soften during storage, deformation is suppressed, and the amount taken is not increased during application, and an appropriate amount can be applied without unevenness.

The copolymer of component (A) contains the structural unit (a) represented by the general formula (1) and the structural unit (b) represented by the general formula (2).
The structural unit (a) represented by the general formula (1) is a structural unit derived by polymerizing a monomer represented by the following general formula (3) (hereinafter also referred to as monomer (a)), R ¹ , R ² , R ³ and X ¹ in general formula (1) and general formula (3) are all synonymous.

(Wherein R ¹ , R ² and R ³ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, and X ¹ represents OM or NHC (CH ₃ ) ₂ CH ₂ SO ₃ M ( M represents a hydrogen atom or a cationic group)
In general formulas (1) and (3), R ¹ and R ² are preferably hydrogen atoms. R ³ is preferably a hydrogen atom or a methyl group, and more preferably a methyl group. X ¹ is preferably NHC (CH ₃ ) ₂ CH ₂ SO ₃ M, and M is preferably a hydrogen atom.
Specific examples of the monomer represented by the general formula (3) include acrylic acid, methacrylic acid, crotonic acid, and 2-acrylamido-2-methylpropanesulfonic acid. Of these, acrylic acid, methacrylic acid, crotonic acid, and 2-acrylamido-2-methylpropanesulfonic acid are preferable because they are excellent in gloss at low temperature and suppress softening during storage. Acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid are more preferred, and acrylic acid and methacrylic acid are more preferred.

  The structural unit represented by the general formula (1) may be derived by using a monomer other than the monomer represented by the general formula (3) and appropriately introducing a functional group after polymerization. The monomer other than the monomer represented by the general formula (3) includes, for example, a monomer having an ester group or a nitrile group. The monomer is hydrolyzed to generate a carboxyl group and represented by the general formula (1). It can be a structural unit.

  The content of the structural unit (a) in the copolymer of the component (A) is such that the component (A) is adsorbed on the solid wax of the component (B) and is excellent in wax dispersibility at low temperatures. Preferably in the coalescence, it is 3% by mass or more, more preferably 5% by mass or more, further preferably 8% by mass or more, preferably 30% by mass or less, more preferably 28% by mass or less. Yes, and more preferably 25% by mass or less. Moreover, content of the structural unit (a) in the copolymer of a component (A) becomes like this. Preferably it is 3-30 mass%, More preferably, it is 5-28 mass%, More preferably, it is 8-25 mass. %.

The structural unit (b) represented by the general formula (2) is a structural unit derived by polymerizing a monomer represented by the following general formula (4) (hereinafter also referred to as monomer (b)). In general formula (2) and general formula (4), R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , X ² and n are all synonymous.

(Wherein R ⁴ , R ⁵ and R ⁶ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, R ⁷ represents an alkylene group having 2 to 4 carbon atoms, and R ⁸ represents carbon. A linear alkyl group or an alkenyl group of formula 14 to 26, X ² represents an oxygen atom or NH, and n represents an integer of 0 to 3)
In general formulas (2) and (4), R ⁴ and R ⁵ are preferably hydrogen atoms, R ⁶ hydrogen atoms or methyl groups are preferred, methyl groups are more preferred, and X ² is preferably an oxygen atom. From the viewpoint of suppressing crystallization of the copolymer, n is preferably 2 or less, more preferably 1 or less, and even more preferably 0. From the viewpoint of suppressing crystallization of the copolymer, R ⁸ has 14 or more carbon atoms, preferably 16 or more, more preferably 18 or more, 26 or less, preferably 22 or less, More preferably, it is 20 or less. R ⁸ is preferably a linear alkyl group or alkenyl group having 16 to 22 carbon atoms, and more preferably a linear alkyl group having 18 carbon atoms.
Among these, the structural unit (b) is preferably a structural unit represented by the following formula (2 ′), and the structural unit is derived from a monomer represented by the following formula (4 ′).

(Wherein R ⁴ , R ⁵ , R ⁶ and R ⁸ have the same meaning as described above)
Specific examples of the structural unit (b) include myristyl (meth) acrylate, palmityl (meth) acrylate, stearyl (meth) acrylate, behenyl (meth) acrylate, and the like. Among these, the structural unit (b) is preferably stearyl (meth) acrylate, more preferably stearyl methacrylate.
The structural unit represented by the general formula (2) may be derived by using a monomer other than the monomer represented by the general formula (4) and appropriately introducing a functional group after polymerization.

  The content of the structural unit (b) in the copolymer of the component (A) suppresses the crystallization of the copolymer, the component (A) is adsorbed to the solid wax of the component (B), and From the viewpoint of excellent wax dispersibility, gloss at low temperature, and suppression of softening during storage, it is 70% by mass or more, preferably 72% by mass or more, more preferably 75% by mass or more. From the same viewpoint, it is 97% by mass or less, preferably 95% by mass or less, and more preferably 92% by mass or less. Moreover, content of the structural unit (b) in the copolymer of a component (A) is 70 to 97 mass%, Preferably it is 72 to 95 mass%, More preferably, it is 75 to 92 mass. %.

  In the copolymer of component (A), the mass ratio of the structural unit (b) to the structural unit (a) ((b) / (a)) is excellent in gloss at low temperatures and softens during storage. From the viewpoint of suppressing and always applying an appropriate amount, it is preferably 2.3 or more, more preferably 2.6 or more, still more preferably 3 or more, preferably 33 or less, more preferably 19 or less. More preferably, it is 11 or less. The mass ratio ((b) / (a)) of the structural unit (b) to the structural unit (a) is preferably 2.3 to 33, more preferably 2.6 to 19, and still more preferably. Is 3-11.

In the copolymer of the component (A), the structural unit (a) and the structural unit (b) can each be used alone or in combination of two or more.
In addition, the total content of the structural unit (a) and the structural unit (b) in the copolymer of the component (A) is excellent in gloss at low temperature, and further suppresses softening during storage, so that an appropriate amount can be obtained at any time. From the viewpoint of application, it is preferably 70% by mass or more, more preferably 80% by mass or more, further preferably 90% by mass or more, still more preferably 95% by mass or more, and still more preferably substantially. Therefore, it is 100% by mass, more preferably 100% by mass.
In addition, substantially 100 mass% means the case where structural units other than the structural unit (a) and the structural unit (b) are inevitably mixed in the copolymer.

The copolymer of the component (A) may contain structural units other than the structural unit (a) and the structural unit (b) as long as the effects of the present invention are not impaired.
In addition, it may be crosslinked as long as it does not impair the effects of the present invention, but it is excellent in gloss at low temperature, and is not crosslinked from the viewpoint of suppressing softening during storage and applying an appropriate amount at any time. It is preferable.

The copolymer of component (A) used in the present invention can be obtained by a known synthesis method. For example, it can be obtained by polymerizing a monomer component containing the monomer (a) and the monomer (b) by a solution polymerization method.
Examples of the solvent used for the solution polymerization include aromatic hydrocarbons (toluene, xylene, etc.), lower alcohols (ethanol, isopropanol, etc.), ketones (acetone, methyl ethyl ketone), ethers (tetrahydrofuran, diethylene glycol dimethyl ether, etc.), etc. The organic solvent can be used. The amount of solvent (mass basis) is preferably 0.5 to 10 times the total amount of monomers.
As the polymerization initiator, known radical polymerization initiators can be used, and examples thereof include azo polymerization initiators, hydroperoxides, dialkyl peroxides, diacyl peroxides, and ketone peroxides. The amount of the polymerization initiator is preferably 0.01 to 5 parts by mass, more preferably 0.01 to 3 parts by mass, and still more preferably 0.01 to 1 part by mass with respect to 100 parts by mass of the total amount of monomers.
The polymerization reaction is preferably performed in a temperature range of 60 to 180 ° C. under a nitrogen stream, and the reaction time is preferably 0.5 to 20 hours.

  The weight average molecular weight of the copolymer of the component (A) used in the present invention suppresses the crystallization of the component (A) even when used in combination with the component (C), and makes the component (B) adsorbable to the wax. From an excellent viewpoint, 5,000 to 1,000,000 are preferable, 10,000 to 200,000 are more preferable, and 20,000 to 120,000 are more preferable. The mass average molecular weight is a value measured by GPC (gel permeation chromatography).

  The content of the copolymer of component (A) is excellent in gloss at room temperature during coating and gloss at low temperature (5 ° C), and suppresses the lipstick from softening and deforming during storage. From the viewpoint that an appropriate amount can be applied without increasing the removal amount, it is 0.1% by mass or more in the oily cosmetic, preferably 0.2% by mass or more, more preferably 0.3% by mass or more, From the viewpoint of suppressing stickiness to the skin when an oily cosmetic is applied, it is 10% by mass or less, preferably 5% by mass or less, more preferably 3% by mass or less, and further preferably 2% by mass or less. Moreover, content of a component (A) is 0.1-10 mass% in oil-based cosmetics, 0.2-5 mass% is preferable, 0.3-3 mass% is more preferable, 0.3 More preferred is ˜2% by mass.

The wax of component (B) used in the present invention is solid at 25 ° C. A solid means a semi-solid to solid property and has a melting point of 40 ° C. or higher.
Such waxes are not limited as long as they are used in ordinary cosmetics, and include, for example, mineral waxes such as ozokerite and ceresin; petroleum waxes such as paraffin, microcrystalline wax, and petrolatum; Fischer-Tropsch wax, polyethylene Synthetic hydrocarbons such as wax; plant waxes such as carnauba wax, candelilla wax, rice wax, tree wax, sunflower wax; animal waxes such as beeswax and whale wax; synthetic waxes such as silicone wax and synthetic beeswax; fatty acids, Higher alcohols and derivatives thereof. Of these, from the viewpoint of excellent shape retention, one or more selected from microcrystalline wax, paraffin, ceresin and polyethylene wax are preferred.
The wax preferably has a melting point of 50 ° C. or higher and 140 ° C. or lower, more preferably 60 ° C. or higher and 110 ° C. or lower, from the viewpoint of excellent oil bleeding suppression and good color appearance.

  The component (B) wax can be used singly or in combination of two or more, and the content is 7% by mass or more, preferably 10% by mass or more, in the total composition, 12 mass% or more is more preferable, it is 25 mass% or less, 22 mass% or less is preferable, and 19 mass% or less is more preferable. Moreover, content of a component (B) is 7-25 mass% in the whole composition, 10-22 mass% is preferable, and 12-19 mass% is more preferable.

  In the present invention, the mass ratio (B) / (A) of (B) to component (A) is excellent in gloss at room temperature during coating and gloss at low temperature (5 ° C.) and suppresses deformation during storage. 1 or more is preferable, 3 or more is more preferable, 4 or more is more preferable, 6 or more is further more preferable, and 120 or less is preferable, from the point that an appropriate amount can be applied without applying a large amount when applied. 80 or less is more preferable, and 60 or less is more preferable. Moreover, 1-120 are preferable, as for mass ratio (B) / (A) of (B) with respect to a component (A), 3-80 are more preferable, 4-60 are more preferable, and 6-60 are more preferable.

The ester oil of component (C) is liquid at 25 ° C. “Liquid” means fluidity, including cream and paste.
The ester oil of component (C) may be any as long as it is used in ordinary cosmetics. For example, avocado oil, macadamia nut oil, olive oil, rapeseed oil, sesame oil, wheat germ oil, linseed oil, cottonseed oil, large oil Bean oil, palm oil. Palm oil, castor oil, jojoba oil, sunflower oil, camellia oil, corn oil, isopropyl myristate, octyldodecyl myristate, isopropyl isostearate, isononyl isononanoate, isotridecyl isononanoate, butyl stearate, oleyl oleate, octyl ricinoleate Dodecyl, octyl hydroxystearate, 2-ethylhexyl paramethoxycinnamate, neopentyl glycol dicaprate, diisostearyl malate, polyglyceryl diisostearate, polyglyceryl triisostearate, glyceryl diisostearate, glyceryl triisostearate, tri (capryl Capric acid) glyceryl, glyceryl tri-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate Trimethylolpropane triisostearate, tetra octanoate pentaerythrityl the like.
In addition, lanolin, trilanolin fatty acid glyceryl, soft lanolin fatty acid, petrolatum, branched or hydroxylated fatty acid cholesteryl, dipentaerythritol fatty acid ester (hexaoxystearic acid dipentaerythritol etc.), isostearic acid cured as cream or paste Castor oil, monohydroxystearic acid hydrogenated castor oil, tri (capryl / caprin / myristin / stearic acid) glyceride, myristyl lactate, dimerlinoleic acid hydrogenated castor oil, dimerlinoleic acid (phytorteryl / isostearyl / cetyl / stearyl / Behenyl), phytosteryl oleate, di-N-lauroyl-L-glutamate (phytosteryl, behenyl, 2-octyldodecyl), and the like.

  Among them, jojoba oil, octyldodecyl myristate, isopropyl isostearate, isotridecyl isononanoate, 2-ethylhexyl paramethoxycinnamate, neopentyl glycol dicaprate, diisostearyl malate, glyceryl diisostearate, glyceryl triisostearate, N -Lauroyl-L-glutamate di (phytosteryl, behenyl, 2-octyldodecyl) is preferred, and isotridecyl isononanoate, 2-ethylhexyl paramethoxycinnamate, neopentyl glycol dicaprate, diisostearyl malate, N-lauroyl -L-glutamate di (phytosteryl, behenyl, 2-octyldodecyl) is more preferable.

  The ester oil of component (C) can be used singly or in combination of two or more, dissolves component (A), suppresses crystallization, and is excellent in gloss at room temperature at the time of coating, the content is The total composition is 5% by mass or more, preferably 20% by mass or more, more preferably 40% by mass or more, 75% by mass or less, preferably 70% by mass or less, and more preferably 65% by mass or less. Moreover, content of a component (C) is 5-75 mass% in all compositions, 20-70 mass% is preferable, and 40-65 mass% is more preferable.

  In the present invention, the mass ratio (C) / (A) of (C) to component (A) is excellent in gloss at room temperature during coating and gloss at low temperature (5 ° C.) and suppresses deformation during storage. , 2 or more is preferable, 7 or more is more preferable, 14 or more is more preferable, 25 or more is more preferable, and 500 or less is preferable, from the point that an appropriate amount can be applied without applying a large amount when applied. 300 or less is more preferable, and 210 or less is more preferable. Moreover, 2-500 are preferable, as for mass ratio (C) / (A) of (C) with respect to a component (A), 7-300 are more preferable, 14-210 are more preferable, and 25-210 are more preferable.

Furthermore, the oily cosmetic of the present invention can contain a powder. Such powder is not limited as long as it is used in ordinary cosmetics, and extender pigments, colored pigments, pearl pigments and the like can be used.
Examples of extender pigments include silicic acid, anhydrous silicic acid, magnesium silicate, talc, sericite, mica, kaolin, clay, bentonite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, Examples thereof include inorganic pigments such as magnesium sulfate, calcium carbonate, and magnesium carbonate, and composite powders thereof.

  Examples of the color pigment include titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, bitumen, ultramarine, chromium oxide, chromium hydroxide and other metal oxides, manganese violet, cobalt titanate and other metal complexes, Furthermore, inorganic pigments such as carbon black, organic pigments such as tar dyes and lake pigments, and natural dyes such as carmine can be used.

Examples of the pearl pigment include mica, synthetic phlogopite, and glass coated with a colorant such as titanium oxide, iron oxide, silicon oxide, bitumen, chromium oxide, carmine, and organic pigment.
As these powders, those subjected to various surface treatments such as water repellency treatment, water repellency / oil repellency treatment, and the like can also be used.

  These powders can be used singly or in combination of two or more, and they give the appearance of cosmetics and a glittering pearl-like shine to the cosmetic film on the skin after application, and an attractive production From the point which carries out, 0.01-50 mass% is preferable in the whole composition, 0.1-20 mass% is more preferable, 0.2-10 mass% is further more preferable.

  Furthermore, the oily cosmetic of the present invention can contain water. The content is preferably 7% by mass or less, more preferably 3% by mass or less, still more preferably 1% by mass or less, and still more preferably substantially not contained in the total composition.

  In addition to the above components, the oily cosmetic of the present invention is a component used in ordinary cosmetics, for example, powders such as extender pigments, color pigments, pearl pigments; oily components other than components (B) and (C); Surfactant, lower alcohol, polyhydric alcohol, sugar, polymer compound other than component (A), ultraviolet absorber, antioxidant, vitamin, fragrance, dye, preservative, moisturizer, thickener, film agent, A pH adjuster etc. can be contained.

  The oily cosmetic of the present invention can be produced by a usual method, and the dosage form may be any of solid, semi-solid, gel, liquid and the like.

The oily cosmetic of the present invention is used for the skin, lips, eyelashes, nails and hair, and preferably used for the lips, and has an oil agent as a continuous phase. Lip cosmetics such as lipstick, lip balm, lip gloss, lip liner, lipstick overcoat, makeup cosmetics such as mascara, eyeliner, eye shadow, cheek color, foundation, concealer, cream, milky lotion, serum, massage Agent, deodorant, sunscreen, hair restorer, hair color, hair wax, hair foam, etc., among others, suitable as lip cosmetics selected from lipstick, lip balm, lip gloss, lip liner, lipstick overcoat, etc. It is.
This invention discloses the following compositions further regarding embodiment mentioned above.

<1> The following components (A), (B) and (C):
(A) A copolymer comprising the structural unit (a) represented by the general formula (1) and the structural unit (b) represented by the general formula (2),
0.1-10% by mass of a copolymer containing 70% by mass to 97% by mass of the structural unit (b) in the copolymer,

Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, and R ⁷ has 2 to 4 carbon atoms. Represents an alkylene group, R ⁸ represents a linear alkyl group or alkenyl group having 14 to 26 carbon atoms, X ¹ represents OM or NHC (CH ₃ ) ₂ CH ₂ SO ₃ M (M represents a hydrogen atom or a cation group). X ² represents an oxygen atom or NH, and n represents an integer of 0 to 3).
(B) 7-25% by mass of a wax solid at 25 ° C.
(C) 5 to 75% by mass of ester oil which is liquid at 25 ° C.
Containing oily cosmetics.

<2> In the component (A), the structural unit (a) represented by the general formula (1) is represented by the following general formula (3).

(Wherein R ¹ , R ² and R ³ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, and X ¹ represents OM or NHC (CH ₃ ) ₂ CH ₂ SO ₃ M ( M represents a hydrogen atom or a cationic group)
The monomer represented by the general formula (3) is preferably acrylic acid, methacrylic acid, crotonic acid, 2-acrylamido-2-methyl. The oily cosmetic according to <1>, which is propanesulfonic acid, more preferably acrylic acid, methacrylic acid, and 2-acrylamido-2-methylpropanesulfonic acid, and further preferably acrylic acid and methacrylic acid.

<3> The content of the structural unit (a) in the copolymer of the component (A) is preferably 3% by mass or more, more preferably 5% by mass or more, and further preferably 8% by mass or more. 30 mass% or less is preferable, 28 mass% or less is more preferable, 25 mass% or less is more preferable The oily cosmetics of said <1> or <2> description.
<4> In the component (A), the structural unit (b) represented by the general formula (2) is represented by the following general formula (4).

(Wherein R ⁴ , R ⁵ and R ⁶ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, R ⁷ represents an alkylene group having 2 to 4 carbon atoms, and R ⁸ represents carbon. A linear alkyl group or an alkenyl group of formula 14 to 26, X ² represents an oxygen atom or NH, and n represents an integer of 0 to 3)
R ⁸ is a linear alkyl group or alkenyl group having 16 to 22 carbon atoms, preferably represented by the general formula (4). The monomer is preferably myristyl (meth) acrylate, palmityl (meth) acrylate, stearyl (meth) acrylate, behenyl (meth) acrylate, more preferably stearyl (meth) acrylate, methacrylic acid The oily cosmetic according to any one of <1> to <3>, wherein stearyl is more preferable.

<5> The content of the structural unit (b) in the copolymer of the component (A) is preferably 72% by mass or more, more preferably 75% by mass or more, and preferably 95% by mass or less, 92 The oily cosmetic according to any one of the above items <1> to <4>, which is more preferably at most mass%.
In the copolymer of <6> component (A), the mass ratio ((b) / (a)) of the structural unit (b) to the structural unit (a) is preferably 2.3 or more. 6 or more is more preferable, 3 or more is more preferable, 33 or less is preferable, 19 or less is more preferable, and 11 or less is further more preferable, The oily cosmetics in any one of said <1>-<5>.
<7> The total content of the structural unit (a) and the structural unit (b) in the copolymer of the component (A) is preferably 70% by mass or more, more preferably 80% by mass or more. The oily cosmetic according to any one of the above items <1> to <6>, further preferably at least 95% by mass, more preferably at least 95% by mass, still more preferably at least 100% by mass, and even more preferably at 100% by mass. .

<8> The weight average molecular weight of the copolymer of component (A) is preferably 5,000 to 1,000,000, more preferably 10,000 to 200,000, and even more preferably 20,000 to 120,000. >-<7> any one of oily cosmetics.
The content of the copolymer of <9> component (A) is preferably 0.2% by mass or more in the total composition, more preferably 0.3% by mass or more, and preferably 5% by mass or less, The oily cosmetic according to any one of <1> to <8>, wherein 3% by mass or less is more preferable, and 2% by mass or less is more preferable.

<10> The component (B) wax is preferably one or more selected from microcrystalline wax, paraffin, ceresin and polyethylene wax, and preferably has a melting point of 50 ° C. or higher and 140 ° C. or lower, 60 ° C. The oily cosmetic according to any one of <1> to <9>, wherein 110 ° C. or lower is more preferable.
The content of the wax of <11> component (B) is preferably 10% by mass or more, more preferably 12% by mass or more, more preferably 22% by mass or less, and more preferably 19% by mass or less in the total composition. The oily cosmetic according to any one of <1> to <10>, preferably.
<12> The mass ratio (B) / (A) of (B) to component (A) is preferably 1 or more, more preferably 3 or more, still more preferably 4 or more, and even more preferably 6 or more. 120 or less is preferable, 80 or less is more preferable, and 60 or less is more preferable, The oily cosmetic according to any one of the above <1> to <11>.

<13> The ester oil of component (C) is preferably jojoba oil, octyldodecyl myristate, isopropyl isostearate, isotridecyl isononanoate, 2-ethylhexyl paramethoxycinnamate, neopentyl glycol dicaprate, diisosodium malate Stearyl, glyceryl diisostearate, glyceryl triisostearate, N-lauroyl-L-glutamate di (phytosteryl, behenyl, 2-octyldodecyl), isotridecyl isononanoate, 2-ethylhexyl paramethoxycinnamate, neopentyl dicaprate Any one of the above <1> to <12>, wherein glycol, diisostearyl malate, and N-lauroyl-L-glutamate di (phytosteryl, behenyl, 2-octyldodecyl) are more preferable. Oily cosmetics.
The content of the ester oil of <14> component (C) is preferably 20% by mass or more, more preferably 40% by mass or more, preferably 70% by mass or less, and preferably 65% by mass or less in the total composition. The oily cosmetic according to any one of <1> to <13>, more preferably.
<15> The mass ratio (C) / (A) of (C) to component (A) is preferably 2 or more, more preferably 7 or more, further preferably 14 or more, and even more preferably 25 or more. 500 or less is preferable, 300 or less is more preferable, and 210 or less is more preferable, The oily cosmetic according to any one of the above <1> to <14>.

Production Example 1 (Copolymer 1; Production of MAA / SMA = 1/9)
A reactor having a stirrer, a reflux condenser, a thermometer, and a nitrogen introduction tube was charged with 125.0 g of isopropanol and heated to 82 ° C. in a nitrogen atmosphere. Separately, 25.0 g of methacrylic acid (MAA; methacrylic acid, manufactured by Wako Pure Chemical Industries), 225.0 g of stearyl methacrylate (SMA; NK ester S, manufactured by Shin-Nakamura Chemical Co., Ltd.), 2,2′-azobis as an initiator (Isobutyric acid) Dimethyl (V-601, manufactured by Wako Pure Chemical Industries, Ltd.) 0.88 g and isopropanol 250.0 g were uniformly mixed and dropped into the reactor at a dropping rate of 4.17 g / min over 2 hours. did. After completion of the dropping, the reaction was completed by maintaining at 82 ° C. for 4 hours. Then, the obtained reaction liquid was dried under reduced pressure at 50 ° C., and isopropanol was distilled off to obtain a copolymer 1.
The mass average molecular weight of the copolymer 1 was 100,000.

Production Example 2 (Copolymer 2; production of AA / SMA = 1/9)
A reactor having a stirrer, a reflux condenser, a thermometer, and a nitrogen introduction tube was charged with 125.0 g of isopropanol and heated to 82 ° C. in a nitrogen atmosphere. Separately, 25.0 g of acrylic acid (AA; acrylic acid, manufactured by Wako Pure Chemical Industries), 225.0 g of stearyl methacrylate (SMA; NK ester S, manufactured by Shin-Nakamura Chemical Co., Ltd.), 2,2′-azobis as an initiator (Isobutyric acid) Dimethyl (V-601, manufactured by Wako Pure Chemical Industries, Ltd.) 0.88 g and isopropanol 250.0 g were uniformly mixed and dropped into the reactor at a dropping rate of 4.17 g / min over 2 hours. did. After completion of the dropping, the reaction was completed by maintaining at 82 ° C. for 4 hours. Then, the obtained reaction liquid was dried under reduced pressure at 50 ° C., and isopropanol was distilled off to obtain a copolymer 2.
The weight average molecular weight of the copolymer 2 was 25000.

Production Example 3 (Copolymer 3; Production of MAA / SMA = 4/6)
A reactor having a stirrer, a reflux condenser, a thermometer, and a nitrogen introduction tube was charged with 125.0 g of isopropanol and heated to 82 ° C. in a nitrogen atmosphere. Separately, 100.0 g of methacrylic acid (MAA; methacrylic acid, manufactured by Wako Pure Chemical Industries, Ltd.), stearyl methacrylate (SMA; NK ester S, manufactured by Shin-Nakamura Chemical Co., Ltd.), 150.0 g, 2,2′-azobis as an initiator (Isobutyric acid) 1.75 g of dimethyl (V-601, manufactured by Wako Pure Chemical Industries, Ltd.) and 250.0 g of isopropanol were uniformly mixed and dropped into the reactor over 2 hours at a dropping rate of 4.18 g / min. did. After completion of the dropping, the reaction was completed by maintaining at 82 ° C. for 4 hours. Then, the obtained reaction liquid was dried under reduced pressure at 50 ° C., and isopropanol was distilled off to obtain a copolymer 3.
The weight average molecular weight of the copolymer 3 was 100,000.

Production Example 4 (Copolymer 4; Production of SMA)
A reactor having a stirrer, a reflux condenser, a thermometer, and a nitrogen introduction tube was charged with 300.0 g of normal hexane and 300.0 g of stearyl methacrylate (SMA; NK ester S, manufactured by Shin-Nakamura Chemical Co., Ltd.) under a nitrogen atmosphere. The temperature was raised to 65 ° C. A solution prepared by dissolving 3.30 g of 2,2′-azobis (2,4-dimethylvaleronitrile) (V-65, manufactured by Wako Pure Chemical Industries, Ltd.) as an initiator in 26.7 g of normal hexane was added thereto. Polymerization was performed for 5 hours. After completion of the polymerization, the reaction solution was dropped into 600.0 g of ethanol under stirring to precipitate the product. Thereafter, the precipitated product was dried under reduced pressure at 50 ° C. to distill off the solvent, thereby obtaining a polymer 4.
The weight average molecular weight of the copolymer 4 was 50,000.

Production Example 5 (Copolymer 5; Production of AA / iSMA = 3/7)
A reactor having a stirrer, a reflux condenser, a thermometer, and a nitrogen introduction tube was charged with 25.0 g of isopropanol and heated to 82 ° C. in a nitrogen atmosphere. Separately, 15.0 g of acrylic acid (AA; acrylic acid, manufactured by Wako Pure Chemical Industries, Ltd.), 35.0 g of isostearyl acrylate (iSMA; NK ester S-1800A, manufactured by Shin-Nakamura Chemical Co., Ltd.), 2,2 as an initiator '-Azobis (isobutyric acid) dimethyl (V-601, manufactured by Wako Pure Chemical Industries, Ltd.) 0.18 g and isopropanol 50.0 g were uniformly mixed, and the reactor was added at a dropping rate of 0.84 g / min for 2 hours. It was dripped in. After completion of the dropping, the reaction was completed by maintaining at 82 ° C. for 4 hours. Then, the obtained reaction liquid was dried under reduced pressure at 50 ° C., and isopropanol was distilled off to obtain a copolymer 5.
The weight average molecular weight of the copolymer 5 was 25000.

Production Example 6 (Copolymer 6; production of AA / iSMA = 1/9)
A reactor having a stirrer, a reflux condenser, a thermometer, and a nitrogen introduction tube was charged with 25.0 g of isopropanol and heated to 82 ° C. in a nitrogen atmosphere. Separately, 5.0 g of acrylic acid (AA; acrylic acid, manufactured by Wako Pure Chemical Industries, Ltd.), 45.0 g of isostearyl acrylate (iSMA; NK ester S-1800A, manufactured by Shin-Nakamura Chemical Co., Ltd.), 2,2 as an initiator '-Azobis (isobutyric acid) dimethyl (V-601, manufactured by Wako Pure Chemical Industries, Ltd.) 0.18 g and isopropanol 50.0 g were uniformly mixed, and the reactor was added at a dropping rate of 0.84 g / min for 2 hours. It was dripped in. After completion of the dropping, the reaction was completed by maintaining at 82 ° C. for 4 hours. Then, the obtained reaction liquid was dried under reduced pressure at 50 ° C., and isopropanol was distilled off to obtain a copolymer 6.
The weight average molecular weight of the copolymer 6 was 25000.

Examples 1-5 and Comparative Examples 1-6 (stick lipstick)
Manufactures stick-shaped lipsticks with the composition shown in Table 1, good lipstick color appearance, glossy finish after lip application, glossy finish in low temperature environment, resistance to lipstick deformation after heat history, after heat history Of lipstick applied to the lips was evaluated. The results are also shown in Table 1.

(Production method)
The base materials other than the powder were dissolved by heating and mixed uniformly. The powder raw material was added to this, uniformly dispersed with a disperser in a heated state, defoamed, and then poured into a mold to obtain a stick-shaped lipstick.

(Evaluation method)
(1) Good color appearance of lipstick appearance:
Five specialist panelists evaluated the color development of the lipstick appearance according to the following criteria. The results are shown as a total of 5 people.
5: Very good color development.
4: Color development is good.
3: Slightly good color development.
2: Color development is not so good.
1: Color development is not good.

(2) Gloss after finishing lip application:
Five professional panelists evaluated the gloss of the finished product after applying lipstick on their lips according to the following criteria. The results are shown as a total of 5 people.
5: Very glossy.
4: There is gloss.
3: Slightly glossy.
2: Not very glossy.
1: No gloss.

(3) Glossy finish in low temperature environment:
Five specialist panelists applied lipstick to their lips, then entered a constant temperature room at 5 ° C., and the gloss of the finished product immediately after application was sensory evaluated according to the following criteria. The results are shown as a total of 5 people.
5: Very glossy.
4: There is gloss.
3: Slightly glossy.
2: Not very glossy.
1: No gloss.

(4) Difficulty of lipstick deformation after heat history:
After the lipstick was stored in a thermostatic bath that circulates between 35 ° C. and 5 ° C. for 4 cycles per day for 1 month, five professional panelists visually observed the degree of deformation and evaluated it according to the following criteria. The results are shown as a total of 5 people.
5: Not deformed.
4: Slightly soft but not deformed.
3: Deforms slightly.
2: Soft and deformed.
1: Soft and easy to break.

(5) Amount of sticking amount when lipstick after heat history is applied to lips:
After storing the lipstick for 1 month in a thermostatic chamber that circulates between 35 ° C and 5 ° C for 4 cycles per day, the five panelists visually observe the amount of the lipstick when applied to the lips. It was evaluated with. The results are shown as a total of 5 people.
3: Appropriate amount for the lips is sufficient.
2: The amount taken on the lips is slightly large.
1: Too much lip removal.

Example 6 (Liquid lipstick)
A liquid lipstick having the composition shown in Table 2 was produced, and in the same manner as in Examples 1 to 5, good lipstick color appearance, finished gloss after applying lips, finished gloss in low temperature environment, lipstick after heat history The amount of sticking when applying to the lips was evaluated. The results are also shown in Table 2.

(Production method)
The base materials other than the powder were dissolved by heating and mixed uniformly. A powder raw material was added thereto, and the mixture was uniformly dispersed with a disperser in a heated state, defoamed, and then poured into a mold to obtain a liquid lipstick.

Example 7, Comparative Examples 7-8
Lipsticks having the compositions shown in Table 3 were produced in the same manner as in Examples 1 to 5, and the surface average roughness was measured. The results are also shown in Table 3.

(Evaluation method)
For the arithmetic average roughness (Ra) of the surface, the reference length is extracted from the roughness curve in the direction of the average line, and the absolute value of the deviation from the average line of the extracted part to the measurement curve is summed to obtain the average value. It was. For the surface roughness, a lipstick was kneaded with a painting knife into a paste, and the surface of the surface spread flatly on a glass plate was measured with a laser microscope (Keyence, VK-9500). It measured using.
The smaller the surface average roughness value, the better the smoothness and the higher the gloss.

In the present invention, the copolymer in the ester oil improves the dispersibility of the wax. Therefore, the aggregate of the wax in the oily cosmetic is reduced and the gloss is improved. The copolymer crystallized in a low temperature environment loses its function as a dispersant, and after acting on the lips, dissolves at body temperature and then gradually acts as a dispersant to improve gloss. In the present invention, the crystallization of the alkyl chain is suppressed by copolymerization, and the copolymer can exist in a dissolved state even in a low temperature environment, so that the glossy finish is obtained immediately after coating. Moreover, even if a severe test with a thermal history is performed, the lipstick is softened and suppressed from being deformed, and the amount of sticking to the lips is stable.
Here, the gloss of the present invention is not simply based on the reflectance of the oil surface, but an improvement in gloss due to the smoothness of the surface of the cosmetic obtained by suppressing the formation of wax aggregates.
This can be understood from the fact that the results of surface average roughness in Table 4 are low in the examples and excellent in smoothness and inferior in smoothness in the comparative examples.

Claims (6)

The following components (A), (B) and (C):
(A) A copolymer comprising the structural unit (a) represented by the general formula (1) and the structural unit (b) represented by the general formula (2),
0.1-10% by mass of a copolymer containing 70% by mass to 97% by mass of the structural unit (b) in the copolymer,

Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, and R ⁷ has 2 to 4 carbon atoms. Represents an alkylene group, R ⁸ represents a linear alkyl group or alkenyl group having 16 to 22 carbon atoms, X ¹ represents OM (M represents a hydrogen atom) , and X ² represents an oxygen atom or NH. Represents an integer of 0 to 3)
(B) 7-25% by mass of a wax solid at 25 ° C.
(C) 40 to 75% by mass of ester oil which is liquid at 25 ° C.
Containing oily cosmetics.   The mass ratio (structural unit (b) / structural unit (a)) of the structural unit (b) to the structural unit (a) in the copolymer of the component (A) is 2.3 to 33. Oily cosmetics.   The oily cosmetic according to claim 1 or 2, comprising 3% by mass or more and 30% by mass or less of the structural unit (a) in the copolymer of the component (A).   The oily cosmetic according to any one of claims 1 to 3, wherein a mass ratio ((B) / (A)) of the component (B) to the component (A) is 1 to 120.   The oily cosmetic according to any one of claims 1 to 4, wherein a mass ratio ((C) / (A)) of the component (C) to the component (A) is 2 to 500. The oily cosmetic according to any one of claims 1 to 5 , wherein the component (B) is one or more selected from microcrystalline wax, paraffin, ceresin and polyethylene wax.