JP5687028B2 - Oily lip cosmetic - Google Patents

Description

  The present invention comprises an oily lip characterized by blending a polymer in which an aqueous solution undergoes a transition from a sol state to a gel state in a temperature range higher than 0 ° C. and lower than 37 ° C., water, fumed silicic acid, and a liquid oil agent. For cosmetics, more specifically, gelation on the lips after application improves the smoothness of the coating film surface and improves the gloss. If the gloss lasts for a long time and develops color, the color is long. It relates to a long-lasting oily lip cosmetic.

In the conventional glossy and colored technology, glossy technology uses oils with a high refractive index (see, for example, Patent Document 1), or glossy oils with high viscosity such as heavy fluid isoparaffin that can form a thick film. It was done to make it better by gelling it. (For example, refer to Patent Document 2) When the film was made solid in order to improve the durability, the spread during application became poor or the stickiness became strong. Further, over time, the cosmetic material dropped on the wrinkles of the lips, so that the smoothness of the surface of the decorative film was lost and the gloss was sometimes lost. Color-holding technology uses a fluorine-based oil agent that has a water- and oil-repellent effect, an organic silicone resin, and a polymer that forms a film by reacting with water to form a film to prevent color migration. The color durability was improved (see, for example, Patent Document 3).
However, these techniques for pursuing the persistence of luster and color have a problem that the luster tends to disappear, the luster tends to disappear, and there is a feeling of burden on the lips. In some cases, a water-soluble polymer that is incompatible with oil is difficult to exert its effect by being uniformly dispersed in the oil.
On the other hand, in a technology that naturally blurs unevenness on the skin such as small wrinkles and pores, a polymer and a partial three-dimensional structure in which an aqueous solution transitions from a sol state to a gel state in a temperature range higher than 0 ° C. and lower than 37 ° C. There has been a technique for combining a crosslinked organopolysiloxane polymer or the like with a powder having a specific refractive index. (For example, see Patent Document 4)

JP 2008-247760 A JP-A-9-235210 JP 2000-38313 A JP 2008-247769 A

  As described above, a polymer in which an aqueous solution transitions from a sol state to a gel state in a certain temperature range has been studied, but since this polymer exhibits such an effect in an aqueous solution, it is incorporated into an oily system. Therefore, a technique for uniformly dispersing the oil in water together with water is necessary in order to fully exert the effect. However, it is difficult to add water to an oily system, and it is usually emulsified and dispersed using a low HLB surfactant. This causes stickiness, and when mixed with organic pigment powder, It was a cause of discoloration over time. Therefore, it has been difficult to obtain an oily lip cosmetic having a good appearance quality and a good makeup effect with no stickiness and good discoloration over time with the technique of Patent Document 4. In addition, although it has an unevenness correction effect, this method is a technology that naturally blurs and makes it inconspicuous, and since it has the opposite effect to the gloss expected for lip cosmetics, it is oily and blended into lip cosmetics It has not been considered to do.

  Therefore, the oily lip has excellent smoothness during application, improves the smoothness of the coating film surface to improve the gloss, and the gloss and color last for a long time, with no discoloration over time and excellent stability. The development of cosmetics was desired.

Since the present inventors are demanding lip cosmetics that have good gloss and color development and have a long-lasting cosmetic effect, the inventors have paid attention to the technology that provides smoothness of the surface of the coating film and maintains it. When applied, it has a low viscosity, enters into the wrinkles of the lips, and gels on the lips depending on the temperature of the lips after application, improving the smoothness of the coating film surface and improving the gloss, and the gloss is long With regard to color development, it was considered that if a smooth film with good pigment dispersion was obtained, color development would be improved and the color would last for a long time.
Therefore, with the aim of providing an oily lip cosmetic that changes its properties during and after application of the lips in order to exhibit the smoothness and smoothness at the time of application, and the effect that the gloss and color will last for a long time. As a result of intensive research, we have developed a novel oily lip cosmetic by using a specific water-soluble polymer whose properties can change according to the surface temperature of the lips, and combining it with water, fumed silicic acid anhydride, and liquid oil. The inventors have found a technique and have completed the present invention.

That is, the present invention
(1) The following components (a) to (d); (a) a block copolymer in which a polymer portion having a lower critical solution temperature (LCST) higher than 0 ° C. and lower than 37 ° C. is bonded to a hydrophilic polymer portion Or a graft copolymer in which the aqueous solution has a sol-gel transition temperature at a temperature higher than 0 ° C. and lower than 37 ° C., (b) water, (c) fumed silicic acid, (d) An oily lip cosmetic characterized by blending with a liquid oil;
(2) The blending mass ratio (a) / (b) of the polymer compound of the component (a) and the water of the component (b) is 10/1 to 1/20 (1) Oily lip cosmetics as described in
(3) The blending mass ratio (c) / (a) of the fumed silicic acid anhydride of the component (c) and the polymer compound of the component (a) is 5/1 to 1/5. The oily lip cosmetic according to (1) or (2),
(4) The oily lip cosmetic according to any one of (1) to (3), wherein lecithin is further blended as the component (e).
(5) The oily lip according to any one of (1) to (4) above, wherein the liquid oil of component (d) contains a liquid oil having an IOB value of 0 to 0.5. Cosmetics,
(6) The liquid oil agent of component (d) contains one or more selected from fatty acid esters of polyhydric alcohols and polybasic acid esters of higher alcohols (1) to (5) ) Oily lip cosmetics according to any one of
(7) The oil according to any one of the above (1) to (5), wherein the liquid oil agent of the component (d) contains one or more selected from polybutene and heavy liquid isoparaffin. Lip cosmetics,
(8) The structural unit of the polymer portion having a lower critical solution temperature (LCST) higher than 0 ° C. and lower than 37 ° C. constituting the polymer compound of the component (a) is poly N-substituted. 1 selected from acrylamide derivatives, poly-N-substituted methacrylamide derivatives and copolymers thereof, polypropylene oxide, copolymers of propylene oxide and other alkylene oxides, polyvinyl methyl ether, polyvinyl alcohol partially acetylated product, and polyalkylene oxide. The oily lip cosmetic according to any one of (1) to (7), wherein the oily lip cosmetic is a seed or two or more kinds,
(9) The structural unit of the polymer portion having an LCST (Lower Critical Solution Temperature) that is higher than 0 ° C. and lower than 37 ° C. constituting the polymer compound of the component (a) is poly-N— Isopropylacrylamide, poly-N-acryloylpiperidine, poly-N-propylmethacrylamide, poly-N, N-diethylacrylamide, poly-N-isopropylmethacrylamide, poly-N-cyclopropylacrylamide, poly-N-acryloylpyrrolidine The oily lip according to any one of the above (1) to (7), selected from poly-N, N-ethylmethylacrylamide, poly-N-cyclopropylmethacrylamide, and poly-N-ethylacrylamide Cosmetics,
(10) The structural unit of the polymer part having an LCST (Lower Critical Solution Temperature) that is higher than 0 ° C. and lower than 37 ° C. constituting the polymer compound of the component (a) is poly N-alkyl Substituted acrylamide derivative and poly N-alkyl substituted methacrylamide derivative, polypropylene oxide, copolymer of propylene oxide and other alkylene oxide, polyvinyl methyl ether, polyvinyl alcohol partial acetylated product, at least one structural unit of polyalkylene oxide and The copolymer according to any one of (1) to (9), wherein the copolymer comprises a structural unit derived from a hydrophilic monomer and a structural unit derived from a hydrophobic monomer. Oily lip cosmetics,
(11) The oily lip cosmetic according to any one of (1) to (10), wherein the polymer compound of component (a) has a sol-gel transition temperature of 30 ° C. or higher and lower than 37 ° C. ,
(12) The oily lip cosmetic according to any one of (1) to (11), wherein the component (a) and the component (b) are mixed and blended in advance. .

  The oily lip makeup comprising the polymer, water, fumed silicic acid anhydride and liquid oil agent, in which the aqueous solution changes from a sol state to a gel state in a temperature range higher than 0 ° C. and lower than 37 ° C. The oil is an oily lip cosmetic that has excellent usability and feel, improves gloss, and lasts for a long time.

Hereinafter, the configuration of the present invention will be described in detail.
In the present invention, the oily lip cosmetic is a cosmetic for lips and oily contains water, but the oily component that is a liquid, semi-solid or solid oil agent or oil-soluble compound is a continuous phase. In this cosmetic, water is dispersed in the oil component.
In the present invention, the lower critical solution temperature (LCST) means that a polymer is dissolved in water at a temperature lower than this temperature and becomes a transparent solution, but becomes insoluble at a temperature higher than this temperature. The temperature at which white turbidity or precipitation occurs and phase separation occurs.

  Component (a) is a block copolymer or graft copolymer in which a polymer portion having a lower critical solution temperature higher than 0 ° C. and lower than 37 ° C. and a hydrophilic polymer portion are bonded, and the aqueous solution is 0 A polymer compound having a sol-gel transition temperature higher than 37 ° C. and lower than 37 ° C. (hereinafter, simply referred to as “specific polymer compound”) has an inherent sol-gel transition temperature. It is a sol having fluidity at a temperature lower than the sol-gel transition temperature, but has a property of losing fluidity and gelling at a temperature higher than the sol-gel transition temperature.

  As such a specific polymer compound, a known compound can be used, and examples thereof include those described as a polymer compound having a sol-gel transition temperature in Japanese Patent No. 3585309. Moreover, the manufacturing method of this high molecular compound can also be performed according to description in specifications, such as Examples 1-6 of this patent 3585309 gazette.

The specific polymer compound of the component (a) includes a polymer portion having an LCST higher than 0 ° C. and lower than 37 ° C. (hereinafter sometimes referred to as “LCST polymer portion”).
The LCST polymer portion includes a temperature-responsive polymer that exhibits LCST behavior. Examples of temperature responsive polymers exhibiting LCST behavior include poly N-substituted acrylamide derivatives, poly N-substituted methacrylamide derivatives and copolymers thereof, polypropylene oxide, copolymers of propylene oxide and other alkylene oxides, polyvinyl Examples thereof include methyl ether, polyvinyl alcohol partial acetylated product, polyalkylene oxide, and the like. In particular, poly N-substituted acrylamide derivatives, poly N-substituted methacrylamide derivatives, and copolymers thereof are preferably used.
More specifically, poly-N-isopropylacrylamide, poly-N-acryloylpiperidine, poly-N-propylmethacrylamide, poly-N, N-diethylacrylamide, poly-N-isopropylmethacrylamide, poly-N-cyclo Examples include propylacrylamide, poly-N-acroylpyrrolidine, poly-N, N-ethylmethylacrylamide, poly-N-cyclopropylmethacrylamide, and poly-N-ethylacrylamide, and poly-N-isopropylacrylamide is particularly preferable. Used.

  The LCST polymer portion may be a homopolymer or a copolymer composed only of a temperature-responsive polymer exhibiting the LCST behavior, or may be a copolymer copolymerized with another monomer. As other monomers constituting such a copolymer, both hydrophilic monomers and hydrophobic monomers can be used.

  Examples of the hydrophilic monomer include N-vinylpyrrolidone, vinylpyridine, acrylamide, methacrylamide, N-methylacrylamide, hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxymethyl methacrylate, hydroxymethyl acrylate, acrylic acid having an acidic group, Methacrylic acid and salts thereof, vinyl sulfonic acid, styrene sulfonic acid and the like, and N, N-dimethylaminoethyl methacrylate, N, N-diethylaminoethyl methacrylate, N, N-dimethylaminopropyl acrylamide and the like having a basic group Examples of the salt are as follows.

  On the other hand, as the hydrophobic monomer, acrylate derivatives and methacrylate derivatives such as ethyl acrylate, methyl methacrylate, butyl methacrylate, glycidyl methacrylate, N-substituted alkylmethacrylamide derivatives such as N-butylmethacrylamide, vinyl chloride, acrylonitrile, styrene, Examples include vinyl acetate.

  The LCST polymer portion constituting the specific polymer compound of component (a) used in the present invention has an LCST in the range higher than 0 ° C. and lower than 37 ° C. When this LCST polymer portion is a homopolymer, for example, poly-N-isopropylacrylamide, poly-Nn-propylmethacrylamide or the like having a unique LCST in the range of 0 to 37 ° C. should be selected as appropriate. Can do. On the other hand, when the LCST polymer portion is a copolymer, it is generally possible to increase the LCST of the copolymer by copolymerizing a hydrophilic monomer with a polymer having LCST, and to co-polymerize a hydrophobic monomer. Since the LCST can be lowered by polymerization, a combination of monomers to be copolymerized with a temperature-responsive polymer exhibiting LCST behavior is selected, and the composition ratio and the like are adjusted, so that the temperature ranges from 0 to 37 ° C. The LCST of the polymer portion can be adjusted within the range.

  The specific polymer compound of component (a) used in the present invention contains a hydrophilic polymer portion in addition to the LCST polymer portion. Examples of the polymer constituting the hydrophilic polymer portion include polyalkylene oxides such as methyl cellulose, dextran, polyethylene oxide, and polypropylene oxide, polyvinyl alcohol, poly N-vinyl pororidone, polyvinyl pyridine, polyacrylamide, and polymethacrylamide. , Poly N-methylacrylamide, polyhydroxymethyl acrylate, polyacrylic acid, polymethacrylic acid, polyvinyl sulfonic acid, polystyrene sulfonic acid and their salts, poly N, N-dimethylaminoethyl methacrylate, poly N, N-diethylaminoethyl methacrylate , Poly N, N-dimethylaminopropylacrylamide and salts thereof.

  The specific polymer compound of component (a) used in the present invention is a block copolymer or graft polymer in which the LCST polymer portion and the hydrophilic polymer portion are bonded. In the case of a graft polymer, even if a hydrophilic polymer portion is bonded as a side chain to an LCST polymer portion that is a main chain, the LCST polymer is used as a side chain to the hydrophilic polymer portion that is a main chain. The parts may be combined.

  The block copolymer of the LCST polymer part and the hydrophilic polymer part may be prepared by, for example, introducing a plurality of reactive functional groups (hydroxyl group, carboxyl group, amino group, isocyanate group, etc.) into the two in advance. It can be obtained by bonding by reaction. For example, by introducing a methacryloyl group which is a polymerizable functional group into both ends of polyethylene oxide which is a hydrophilic polymer, and copolymerizing with N-isopropylacrylamide which is a monomer constituting a polymer having LCST, poly- A block copolymer of an LCST polymer portion composed of N-isopropylacrylamide and a hydrophilic polymer portion composed of polyethylene oxide can be obtained.

  Also, N-isopropylacrylamide and N-acryloxy succinimide are copolymerized to synthesize a polymer in which a group capable of reacting with a primary amine is introduced, and this is reacted with polyethylene oxide having a primary amino group introduced at the terminal. Thus, a block copolymer of an LCST polymer portion composed of poly-N-isopropylacrylamide and a hydrophilic polymer portion composed of polyethylene oxide can be obtained.

  On the other hand, the graft copolymer of the polymer part having the LCST and the hydrophilic polymer part can use a normal graft polymerization method, a method using a chain transfer reaction of the polymer, and free to the backbone polymer. From the viewpoint of controlling the degree of polymerization of the side chain, it is possible to use a method of introducing a functional group capable of splitting into a group and starting polymerization from the functional group, a method of starting ionic polymerization from a trunk polymer, etc. Introducing one polymerizable functional group into the LCST polymer part and copolymerizing with a monomer that gives the hydrophilic polymer part, or introducing one polymerizable functional group into the hydrophilic polymer part However, a method of copolymerizing with a monomer constituting the LCST polymer portion is preferably used.

The molecular weight of the specific polymer compound of the component (a) used in the present invention is preferably 10,000 or more, and particularly preferably 100,000 or more because a gel is formed well when the temperature is higher than the sol-gel transition temperature. . Such a molecular weight can be obtained from the block copolymer or graft copolymer obtained as described above using a normal separation and purification means such as ultrafiltration.
The molecular weight can be measured according to the method described in Japanese Patent No. 3585309. The specific polymer compound of these components (a) can use 1 type (s) or 2 or more types.

  As described above, depending on the composition of the LCST polymer part and the hydrophilic polymer part, the hydrophobicity and hydrophilicity of both polymer parts, the molecular weight, etc. The gel transition temperature is adjusted to a range higher than 0 ° C. and lower than 37 ° C., preferably 20 ° C. or higher and lower than 37 ° C., particularly preferably 30 ° C. or higher and lower than 37 ° C. If the sol-gel transition temperature is in this range, it can flow on the lips because it has fluidity when applied, and then fills the recesses. Since it is smoothed, it has excellent usability and usability, improves the smoothness of the coating film surface to improve the gloss, and provides an effect of maintaining the gloss and color for a long time.

  As a commercial product of such a specific polymer compound, Mebigel-32 (sol-gel transition temperature 32 ° C.) or Mebigel-20 (sol-gel transition temperature 20 ° C .; both manufactured by Ichimaru Falcos) can be used. Mebigel 32 is preferably used. Mevigel-32 and 20 are 15% by mass (hereinafter simply referred to as “%”) of N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer. ) Aqueous solution.

  The blending amount of the specific polymer compound of the component (a) in the oily lip cosmetic of the present invention is preferably 0.1 to 5%, more preferably 0.2 to 3%. Within this range, the gelling power on the lips is more prominently expressed, the gloss is improved by improving the smoothness of the coating film surface, and the gloss and color are preferred for a long time.

The water of component (b) used in the present invention includes purified water, hot spring water, deep sea water, steam distilled water of plants such as rose water, lavender water, aloe vera, witch hazel, hamamelis, cucumber, lemon, Plant extracts such as lavender and rose can be used.
The blending amount of the component (b) water in the oily lip cosmetic of the present invention is preferably 0.4 to 22%, more preferably 2 to 13%. Within this range, the dispersibility of component (a) is improved, the gelling power on the lips is more pronounced, the smoothness of the coating film surface is improved, and the gloss is improved. Is preferable in that it lasts for a long time.
Further, the blending mass ratio (a) / (b) of the component (a) and the component (b) is preferably 10/1 to 1/20, and more preferably 7/1 to 1/15. Within this range, the dispersibility of the component (a) is improved, the gelling power is more pronounced, the smoothness of the coating film surface is improved to improve the gloss, and the gloss and color last for a long time. This is preferable.
Furthermore, it is preferable that the component (a) and the component (b) are mixed in advance and then mixed with other components. In the present invention, when the component (a) is premixed with the water of the component (b) and blended in a swollen form, the dispersibility of the component (a) is improved and the gelling power on the lips is more prominent. It is preferable because it develops, gloss is improved, and gloss and color last for a long time.

The fumed silicic acid component (c) used in the present invention can uniformly disperse the component (a) in the oily component, thereby exhibiting an effect of efficiently gelling on the lips, In addition, the component (a) can be blended stably, and as a result, the smoothness of the coating film surface can be improved and the gloss can be improved.
Examples of the fumed silicic anhydride of component (c) include those obtained by hydrolyzing silicon tetrachloride in hydrogen and oxygen flame, and commercially available products include AEROSIL 50, AEROSIL 130, AEROSIL 200, and AEROSIL. 200V, AEROSIL 200CF, AEROSIL 200FAD, AEROSIL 300, AEROSIL 300CF, AEROSIL 380S (above, manufactured by Nippon Aerosil Co., Ltd.) and the like.
Moreover, the hydrophobic fumed silicic acid which processed the said fumed silicic acid with reactive organosilane, organosilazane, etc. may be sufficient. Hydrophobic treatment methods include dimethylsilylation treatment with dimethyldichlorosilane, trimethylsilylation treatment with trimethylchlorosilane and hexamethyldisilazane, octylsilylation treatment with octyltrichlorosilane, dimethylpolysiloxane and methylhydrogenpolysiloxane. Examples include silicone treatment and coating treatment with a metal soap compound. Commercially available products include AEROSIL R972, AEROSIL R974, AEROSIL R976 (above, dimethyldichlorosilane treatment), AEROSIL RX200, AEROSIL RX300 (above, hexamethyldisilazane treatment), AEROSIL R805 (octylsilane treatment), AEROSIL RY200, AEROSIL RY300 (above, treated with dimethylsiloxane) (all manufactured by Nippon Aerosil Co., Ltd.), Cabosil TS530 (treated with trimethylchlorosilane) (produced by Cabot), and the like can be mentioned. The primary particle size of these fumed silicic anhydride is preferably 50 nm or less, particularly preferably 5 to 20 nm. The specific surface area by the BET method is preferably 90 m <2> / g to 400 m <2> / g. The fumed silicic acid component (c) can be used alone or in combination of two or more as required.

In the oily lip cosmetic of the present invention, the amount of the component (c) fumed silicic acid is preferably 0.1 to 7%, and further 0.5 to 4% improves the dispersibility of the component (a). The gelling power on the lips is more remarkably exhibited, the gloss is improved by improving the smoothness of the coating film surface, and the gloss and color are more preferable for a long time. Further, the blending mass ratio (a) / (c) of the component (a) and the component (c) is preferably 5/1 to 1/5, and more preferably 3/1 to 1/3.
Within this range, the dispersibility of component (a) is improved, the gelling power on the lips is more pronounced, the smoothness of the coating film surface is improved and the gloss is improved, and the gloss and color are It is preferable in that it lasts for a long time.

The liquid oil agent of the component (d) used for this invention is a component used as the base material of oily lip cosmetics. The liquid oil of component (d) can be used without particular limitation as long as it is liquid at 25 ° C. and is usually used in cosmetics, regardless of the origin of animal oil, vegetable oil, synthetic oil, etc. , Oils and fats, ester oils, higher alcohols, silicone oils, fluorine oils, lanolin derivatives and the like. Specifically, hydrocarbons such as liquid paraffin, heavy liquid isoparaffin, α-olefin oligomer, squalane, polyisobutylene, polybutene, oils and fats such as olive oil, castor oil, macadamian nut oil, jojoba oil, diisobutyl adipate 2-hexyldecyl adipate, di-2-heptylundecyl adipate, alkyl glycol monoisostearate, isocetyl isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, 2-ethylhexanoic acid Cetyl, di-2-ethylhexanoic acid neopentyl glycol, tri-2-ethylhexanoic acid trimethylolpropane, tetra-2-ethylhexanoic acid pentaerythritol, cetyl octanoate, oleyl oleate, olei Octyldodecyl acid, decyl oleate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, ethyl acetate, butyl acetate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, Cetyl lactate, myristyl lactate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptyl undecyl palmitate, dipentaerythritol fatty acid ester, isopropyl myristate, isopropyl palmitate, 2-octyl myristate Dodecyl, 2-hexyldecyl myristate, myristyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, N-lauro Ile-L-glutamic acid-2-octyldodecyl ester, diisostearyl malate, glyceryl triisooctanoate, glyceryl triisostearate, diglyceryl diisostearate, diglyceryl triisostearate, diglyceryl tetraisostearate, decaglyceryl decaisostearate , Esters of glyceryl triisopalmitate, glyceryl trimyristate, diglyceryl myristate, and the like, amino acid oils such as N-lauroyl-L-glutamate (phytostearyl 2-octyldodecyl), isostearic acid, olein Fatty acids such as acids, higher alcohols such as oleyl alcohol and isostearyl alcohol, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylsilane Lopentasiloxane, octamethylcyclotetrasiloxane, alkoxy-modified organopolysiloxane, silicone oils such as fluorine-modified silicone, fluorine-based oils such as perfluoropolyether, lanolin, lanolin acetate, lanolin fatty acid isopropyl, lanolin such as lanolin alcohol A derivative | guide_body is mentioned, These can use 1 type (s) or 2 or more types.
Among these, it is preferable to contain a liquid oil agent having an IOB value of 0 to 0.5 because it does not change color with time and is excellent in stability. Among these, hydrocarbons such as liquid paraffin, heavy liquid isoparaffin, α-olefin oligomer, squalane, polyisobutylene, polybutene, glyceryl triisostearate, diisostearyl malate, cetyl 2-ethylhexanoate, and glyceryl triisooctanoate Preferably, commercially available products include KLEAROL (manufactured by SONNEBORN), Pearl Ream 18, Pearl Ream 24, Pearl Ream 46 (manufactured by Nippon Oil & Fats Co., Ltd.), LIALCARB SR-1000 / R (manufactured by Mitsui Chemicals Fine), purified polybutene 100F (SB) (manufactured by Nippon Natural Products), polybutene 100R, polybutene 300R, polybutene 2000H food additive (above, manufactured by Idemitsu Kosan Co., Ltd.), Cosmall 43V, Cosmole 222 (above, Nisshin Oillio Group, Inc.) ), Nikkor CIO, TRIFAT S-308 (manufactured by Nihon Surfactant Kogyo Co., Ltd.), MYRITOL GTEH, etc. (or more, include the Cognis Co., Ltd.), and the like.
When the liquid oil contains one or more selected from fatty acid esters of polyhydric alcohols and polybasic acid esters of higher alcohols, the dispersibility of component (a) is improved, and the gelling power on the lips is improved. It is preferable in that it remarkably develops, improves the smoothness of the coating film surface to improve the gloss, and the gloss and color last for a long time.
Further, the inclusion of one or more selected from polybutene and heavy liquid isoparaffin is preferred in that the gloss is further improved and the gloss and color are further maintained for a long time.

  The blending amount of the component (d) liquid oil in the oily lip cosmetic of the present invention is preferably 69 to 99%, and more preferably 80 to 96% has a smoothness at the time of application, and is excellent in stability over time. It is more preferable in terms of improving the dispersibility of the pigment.

The oily lip cosmetic of the present invention further improves dispersibility of the specific polymer compound of component (a) in the oily component by further blending the component (e) lecithin, so that The effect of gelation above and the stability of the component (a) in the oil component can be significantly improved. As a result, the gloss of the coating film surface can be improved and the gloss can be further improved.
The lecithin of the component (e) is not particularly limited as long as it is usually used in cosmetics. For example, natural lecithin extracted from microorganisms such as egg yolk, soybean, corn, and Escherichia coli, and hydrogen thereof. Additives, as well as synthetic lecithin. Specific examples include phosphatidylcholine, phosphatidylinositol, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, sphingomyelin, dipalmitoylphosphatidylcholine, and mixtures thereof. 1 type (s) or 2 or more types can be used. Of these, hydrogenated ones are preferred in that they have good stability against heat and oxidation and are less likely to cause odor. Examples of commercially available products include lecithin CLO (manufactured by J-Oil Mills), NIKKOL recinol S-10EZ (manufactured by Nikko Chemicals), and the like.

  The blending amount of the lecithin of the component (e) in the oily lip cosmetic of the present invention is preferably 0.1 to 7%, and further 0.7 to 4 improves the dispersibility of the component (a), It is more preferable in that the gelling power is more remarkably exhibited, the gloss is improved by increasing the smoothness of the coating film surface, and the gloss and color last for a long time.

  In the oily lip cosmetic of the present invention, various components other than the components (a) to (e), for example, an oily component other than the component (d) and components, as necessary, within a range not impairing the effects of the present invention. Powders other than (c), surfactants, ultraviolet absorbers, moisturizers, aqueous components other than component (b), antioxidants, cosmetic components, preservatives, water-soluble polymers other than component (a), films A forming agent, an anti-fading agent, an antifoaming agent, a fragrance and the like can be appropriately blended in order to impart various effects.

  The oily component can be used without particular limitation as long as it is a solid or paste-like oily component at 25 ° C., which is usually used in cosmetics, other than the component (d). For example, petroleum jelly, ceresin wax, polyethylene wax, fisher Tropsch wax, paraffin wax, microcrystalline wax, ozokerite wax, hydrocarbons such as ethylene propylene copolymer, fats and oils such as owl, beeswax, carnauba wax, candelilla wax, gay wax, montan wax, etc., cholesterol Fatty acid esters, N-lauroyl-L-glutamic acid di (cholesteryl, behenyl, octyldodecyl), and other amino acids, stearic acid, lauric acid, myristic acid, behenic acid and other fatty acids, stearyl alcohol, Higher alcohols such as alcohol, lauryl alcohol, and behenyl alcohol, silicone oils such as cross-linked organopolysiloxane, silicone wax, rosin acid pentaerythritol ester, oily gelling agent, 12-hydroxystearic acid, dextrin palmitate, Palmitic acid / 2-ethylhexanoic acid dextrin, stearic acid dextrin, sucrose stearic acid ester, sucrose palmitic acid ester, octanoic acid dextrin, palmitic acid / stearic acid dextrin, oleic acid dextrin, isopalmitic acid dextrin, isostearic acid dextrin Dextrin fatty acid esters, sucrose stearate, sucrose fatty acid ester of sucrose acetate stearate, aluminum isostearate Arm, and calcium stearate.

As the powder component, other than the component (c), as long as it is a powder usually used in cosmetics, a spherical shape, a plate shape, a needle shape or the like, an aerosol shape, a fine particle, a pigment grade particle size, a porous material, It is not particularly limited by the particle structure such as non-porous, and examples thereof include inorganic powders, glitter powders, organic powders, pigment powders, metal powders, and composite powders. Specifically, white inorganic pigments such as titanium oxide, zinc oxide, cerium oxide, barium sulfate, iron oxide, carbon black, titanium / titanium oxide sintered product, chromium oxide, chromium hydroxide, bitumen, ultramarine blue, etc. Colored inorganic pigments, talc, muscovite, phlogopite, saucite, biotite, synthetic mica, sericite (sericite), synthetic sericite, silicon carbide, aluminum oxide, magnesium oxide, zirconium oxide, antimony oxide, aluminum silicate , White body powder such as aluminum magnesium metasilicate, calcium silicate, barium silicate, magnesium silicate, calcium carbonate, magnesium carbonate, hydroxyapatite, boron nitride, clay minerals such as kaolin, bentonite, smectite, hectorite, montmorillonite , And their organic modifications, oxidation Tan coated mica, titanium oxide coated bismuth oxychloride, iron oxide mica titanium, bituminized mica titanium, carmine treated mica titanium, bismuth oxychloride, fish scale foil, polyethylene terephthalate / aluminum / epoxy laminated powder, polyethylene terephthalate / polyolefin laminated film powder, Glossy powder such as polyethylene terephthalate / polymethylmethacrylate laminated film powder, titanium oxide coated glass flakes, polyamide resin, polyethylene resin, polyacrylic resin, polyester resin, fluorine resin, cellulose resin, polystyrene resin , Copolymer resin such as styrene-acrylic copolymer resin, organic polymer resin powder such as polypropylene resin and urethane resin, organic low molecular weight powder such as zinc stearate and N-acyl lysine, silk Powder, natural organic powders such as cellulose powder, organic pigments such as red 201, red 202, red 205, red 226, red 228, orange 203, orange 204, blue 404, yellow 401 Powder, organic pigment powder such as zirconium, barium or aluminum lake such as red No. 3, red No. 104, red No. 106, orange No. 205, yellow No. 4, yellow No. 5, green No. 3, blue No. 1, etc. Metal powder such as aluminum powder, gold powder, silver powder, fine particle titanium oxide coated mica titanium, fine particle zinc oxide coated mica titanium, barium sulfate coated mica titanium, titanium oxide containing silicon dioxide, zinc oxide containing silicon dioxide, etc. Can be mentioned. These powders can be used singly or in combination of two or more of them.
These powders are one or two of fluorine compound, silicone compound, metal soap, lecithin, hydrogenated lecithin, collagen, hydrocarbon, higher fatty acid, higher alcohol, ester, wax, wax, surfactant and the like. Surface treatment may be performed using seeds or more.

The surfactant is not particularly limited as long as it is a surfactant that is usually used in cosmetics, and is a non-ionic surfactant, an anionic surfactant, a cationic surfactant, and an amphoteric other than the component (e). A surfactant or the like is used, but it is mainly used as a powder dispersant, and the blending amount is preferably 10% or less. Furthermore, examples of the ultraviolet absorber include benzophenone-based, PABA-based, cinnamic acid-based, salicylic acid-based ultraviolet absorbers, 4-tert-butyl-4′-methoxydibenzoylmethane, oxybenzone, and the like. Examples of the agent include protein, mucopolysaccharide, collagen, elastin, keratin and the like.
Further, the aqueous component can be used for the purpose of imparting a moisture effect, and any component that is soluble in water may be used. For example, propylene glycol, 1,3-butylene glycol, dipropylene glycol, polyethylene glycol, and the like. Glycerols such as glycols, glycerin, diglycerin, polyglycerin and the like can be mentioned.
Examples of antioxidants include α-tocopherol and ascorbic acid, examples of cosmetic ingredients include vitamins, anti-inflammatory agents, herbal medicines, and examples of preservatives include paraoxybenzoate, phenoxyethanol, and 1,2-penta. Examples thereof include diols.

  The oily lip cosmetic of the present invention is not particularly limited, and examples thereof include solid, semi-solid, and liquid lipsticks, lip gloss, lip treatment, lip balm, lip base for foundation, Examples include lipstick overcoats.

EXAMPLES Examples of the present invention will be described below, and the present invention will be described in more detail. However, the present invention is not limited to these examples.
Examples 1-8 and Comparative Examples 1-4: Lipstick (liquid)
Lipsticks having the composition shown in Table 1 were prepared by the following production method. For each sample, gloss, gloss over time, color persistence over time, feeling of use (smoothness at the time of application, no stickiness), The items of stability over time were evaluated, and the results are also shown in Table 1.

* 1: Polybutene 2000H food additive (made by Idemitsu Kosan Co., Ltd.)
* 2: Aqueous solution of N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer: Brand name Mebigel 32 (solid content 15%; sol-gel transition temperature) 32 ℃: Made by Ichimaru Falcos)
* 3: AEROSIL R972 (Nippon Aerosil Co., Ltd.)
* 4: AEROSIL 380S (Nippon Aerosil Co., Ltd.)
* 5: NIKKOL Resinol S-10EZ (Nikko Chemicals)

(Production method)
A: Components 1 to 4 are heated to 90 ° C. and dissolved uniformly.
B: Components 5 to 14 are uniformly mixed and dispersed.
C: B and components 15 to 17 are added to A and mixed and dispersed.
D: After defoaming C, fill the lipstick container with application body.

<Sensory evaluation>
The following evaluation items were evaluated by 20 specialist panels for each sample. Observe the condition immediately after application for b), b) and d), and c) for 3 hours after application, and give a score based on the following 6 absolute evaluation criteria. The average value was calculated from the total score, and judged according to the following four-step criteria.
(Sensory evaluation items)
A. Smoothness of spread during application. Gloss C. Glossy over time. Color lasting over time. No stickiness

Absolute Evaluation Criteria (Score): (Evaluation)
6 points: Very good 5 points: Good 4 points: Slightly good 3 points: Normal 2 points: Slightly bad 1 point: Bad 4 grade criteria (judgment): (Average score)
◎: More than 5 points ○: More than 3 points 5 points or less △: More than 2 points 3 points or less ×: 2 points or less

<Stability evaluation over time>
Each sample was allowed to stand at 40 ° C. for one month, observed for separation and discoloration, and evaluation of stability over time was determined according to the following four-stage criteria.

F. Stability over time 4-step criteria (judgment): (average score)
A: There is no separation or discoloration.
○: There is some separation or discoloration, but there is no problem in use.
Δ: There is a little separation or discoloration, which hinders use.
X: There is separation or discoloration.

As is apparent from the results in Table 1, the lipsticks of Examples 1 to 8 of the present invention have better dispersibility of the component (a) and more pronounced gelling power on the lips than the comparative examples. Since the surface of the coating film is high, the gloss is high, the gloss and color last for a long time, and the stability over time is excellent. Furthermore, silylation-treated fumed silicic acid or fumed silicic anhydride And Examples 1-7 which mix | blended both hydrogenated soybean phospholipid were those which were superior to Example 8 which mix | blended only fumed silicic acid anhydride.
On the other hand, in Comparative Example 1 in which the specific water-soluble polymer compound of the component (a) was not blended, the coating film did not gel on the lips and the smoothness was low. The color lasting has been damaged.
Comparative Example 2 using a large amount of polybutene instead of component (a) is less glossy over time and less colored over time because the coating film does not gel on the lips compared to the examples. The smoothness of time was lacking and there was stickiness.
In Comparative Example 3 in which the component (c) was not blended, the dispersibility of the component (a) was poor and significant separation was observed over time, and since the component (a) was localized, it lacked smoothness at the time of coating, Since the coating film did not gel, and the coating film was not smooth, the gloss, gloss over time, and color over time were poor.
In Comparative Example 4 where polyoxyethylene hydrogenated castor oil (20EO) as a surfactant was used instead of component (c) fumed silicic acid, and diglyceride isostearate was used instead of diglyceryl triisostearate as an oil agent The dispersibility of component (a) was good, and no significant separation with time was observed, but significant discoloration was observed, the smoothness at the time of coating was lacking, and there was stickiness.

  (Example 9) Although it is the same composition as Example 1 of Table 1, it replaces with the aqueous solution (component 5) which mixed the said component (a) and the component (b) previously, N-isopropylacrylamide and methacrylic acid n- Using 0.75% of butyl poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer and 4.25% of purified water of component 6, mixed simultaneously with components 7-12, other Ingredients were prepared in the same manner as in Example 1 to obtain the lipstick of Example 9. As a result of evaluation in the same manner as in Examples 1 to 8, smoothness at the time of application (◯), gloss (○), gloss over time (○), color over time (○), no stickiness (◎) The stability over time (（) was obtained. In Example 1, compared with Example 9, the dispersibility of the component (a) is very good, so the gelation is good and the smoothness of the coating film is excellent. The gloss, gloss with time, and color with time were even better.

(Example 10) Stick-shaped lip balm (mold molding)
(Ingredient) (%)
1. Candelilla wax 4
2. Ethylene / propylene copolymer * 6 9
3. Rosin acid pentaerythritol 5
4). Lauroyl glutamate di (octyldodecyl /
Phytosteryl / behenyl) 14
5. Cetyl 2-ethylhexanoate 22
6). Acetic acid liquid lanolin 20
7). 7. Diglyceryl triisostearate 8 Diisostearyl malate 10
9. Aqueous solutions of specific polymer compounds * 2 5
10.1,3-butylene glycol 1
11. Smoke-like silicic acid * 7 1
12 Phenoxyethanol 0.3
13. 6,6-Dietary-butyl-paracresol 0.1
* 6: EP-700 (New Phase Technology)
* 7: AEROSIL200 (manufactured by AEROSIL Japan)
(Production method)
A: Components 1 to 8 are heated to 100 ° C. and dissolved uniformly.
B: Components 9 to 11 are uniformly mixed and dispersed.
C: B and components 12 and 13 are added to A and mixed and dispersed.
D: After defoaming C, it was poured into a mold container (made of aluminum), cooled and solidified, and attached to the container to obtain a stick-shaped lip balm.

  Example 10 was evaluated in the same manner as in the evaluation methods used in Examples 1 to 8. As a result, the gloss and the gloss with time were good, the coating was smooth and smooth, and there was no stickiness. It was a lip balm.

(Example 11) Oil-based casting lip gloss (molding)
(Ingredient) (%)
1. Polyethylene wax 2
2. Ethylene / propylene copolymer 4
3. Microcrystalline wax 1
4). Isotridecyl isononanoate 15
5. Lauroyl glutamate di (octyldodecyl /
Phytosteryl / behenyl) 5
6). Dipentaerythritol fatty acid ester * 8 5
7). Vaseline 2.5
8). Polybutene * 1 5
9. Heavy liquid isoparaffin * 9 18
10. Liquid paraffin 10
11. Diisostearyl malate 8
12 Diglyceryl triisostearate 5
13. Isotridecyl isononanoate Remaining amount 14. Aqueous solutions of specific polymer compounds * 2 5
15.1,3-Butylene glycol 1
16. Smoke-like silicic acid * 4 1
17. Hydrogenated soybean phospholipid * 5 1
18. Phenoxyethanol 0.1
19.2,6-Dietary-butyl-paracresol 0.1
20. Red No. 202 0.01
21. Yellow No. 0.01
* 8: Cosmall 168ARNV (Nisshin Oillio Group)
* 9: Pearl Dream 18 (Nippon Yushi Co., Ltd.)
(Production method)
A: Components 1 to 13 are heated to 100 ° C. and dissolved uniformly.
B: Components 14 to 17 are uniformly mixed and dispersed.
C: B and components 18 to 21 are added to A and mixed and dispersed.
D: After defoaming C, it was poured into a metal pan (aluminum) and solidified by cooling to obtain an oily lip gloss.

  About Example 11, as a result of evaluating in the same manner as the evaluation method used in Examples 1 to 8, the gloss and gloss over time, the color lasting over time are good, and there is smoothness at the time of application. It was an oil-based casting lip gloss having no stickiness and excellent stability with no separation and discoloration over time.

(Example 12) Semi-solid lipstick (component) (%)
1. Microcrystalline wax 3.5
2. Polyethylene wax 1
3. Candelilla wax 2
4). Dextrin palmitate 8
5. Diisostearyl malate 10
6). Glyceryl tri-2-ethylhexanoate 17
7). Diglyceryl triisostearate 5
8). Isotridecyl isononanoate 10
9. Acetic acid liquid lanolin 20
10. Liquid paraffin 11 Aqueous solutions of specific polymer compounds * 2 5
12.1,3-butylene glycol 1
13. Smoke-like silicic acid * 4 1
14 Hydrogenated soybean phospholipid * 5 1
15. Phenoxyethanol 0.3
16. Haze-like silicic acid * 4 3.5
17. Red No. 202 0.5
18. Yellow No. 0.5
19. Titanium oxide 0.5
20. Black iron oxide 0.1
(Production method)
A: Components 1 to 10 are uniformly dissolved at 100 ° C.
B: Components 11 to 14 are uniformly mixed and dispersed.
C: B and components 15 to 20 are added to A and mixed and dispersed.
D: After defoaming C, it was poured into a cylindrical container with an applicator (made of polyethylene terephthalate) and cooled to obtain a semi-solid lipstick.

  Example 12 was evaluated in the same manner as in the evaluation methods used in Examples 1 to 8. As a result, the gloss and gloss over time, the color persistence over time were good, and the smoothness at the time of application was smooth. It was a semi-solid lipstick with no stickiness and excellent stability with no separation or discoloration over time.

(Example 13) Lip essence (water-in-oil liquid)
(Ingredient) (%)
1. Dextrin palmitate 5
2. Fischer-Tropsch wax * 10 1
3. Polyethylene wax * 11 2
4). Pentaerythrityl tetraisostearate * 12 5
5. 5. Glyceryl tri-2-ethylhexanoate Vaseline 10
7). Lauroyl glutamic acid (phytosteryl / octyldodecyl) 10
8). Isotridecyl isononanoate 10
9. Dimethylpolysiloxane 2% treated bengara 0.1
10.1,2-pentadiol alcohol 0.1
11. Tocopherol 0.1
12 Aqueous solutions of specific polymer compounds * 2 5
13. 1,3-Butylene glycol 1
14 Dimethylsilylation-treated fumed silicic acid * 3 3
15. Hydrogenated soybean phospholipid * 5 2
16.1,3-Butylene glycol 3
17. Purified water 5
18. Glycerin 2
19. Red No. 202 0.005
* 10: CIREBELLE108 (manufactured by CIREBELLE)
* 11: PERFORMALENE 500 (New Phase Technology)
* 12: Estelol PT-ISHV (National Mimatsu)
(Production method)
A: Components 1 to 7 are uniformly dissolved at 90 ° C.
B: Components 8 to 11 are added to A and mixed and dispersed uniformly.
C: Components 12 to 15 are mixed and dispersed uniformly.
D: Components 16 to 18 are uniformly mixed and dispersed.
E: C and component 19 are added to B and mixed and dispersed uniformly.
F: E is heated to 90 ° C, D is heated to 90 ° C, and the mixture is injected and emulsified with stirring.
G: F was cooled and defoamed, then poured into a cylindrical container (made of polyethylene terephthalate) with an applicator and cooled to obtain a liquid lip essence.
About Example 13, as a result of evaluating in the same manner as in the evaluation methods used in Examples 1 to 8, even when applied to the uneven lip surface that was uneven and rough, the smooth coating film was formed. As a result, high gloss and long-lasting gloss persist for a long time, there was smoothness at the time of application, no stickiness, and excellent moisture feeling. Further, the lip essence was excellent in stability without separation and discoloration over time.

(Example 14) Lip base (molding)
(Ingredient) (%)
1. Candelilla wax 3
2. Ethylene / propylene copolymer * 6 9
3. Rosin acid pentaerythritol 5
4). Lauroyl glutamate di (octyldodecyl /
Phytosteryl / behenyl) 14
5. Cetyl 2-ethylhexanoate 15
6). Acetic acid liquid lanolin 10
7). 7. Diglyceryl triisostearate 8 Diisostearyl malate 10
9. Dimethylpolysiloxane 2% treated yellow iron oxide 2
10. Dimethylpolysiloxane 2% treated bengara 0.5
11. Dimethylpolysiloxane 2% black iron oxide 0.3
12 Dimethylpolysiloxane 2% treated titanium 8
13. Dimethylpolysiloxane 2% treated sericite 5
14 Synthetic phlogopite * 13 5
15. Aqueous solutions of specific polymer compounds * 2 5
16.1,3-butylene glycol 1
17. Smoke-like silicic acid * 7 1
18. Phenoxyethanol 0.3
19.2,6-Dietary-butyl-paracresol 0.1
20. Red No. 202 0.005
* 13: PDM-5L (Topy Industries)
(Production method)
A: Components 1 to 8 are heated to 100 ° C. and dissolved uniformly.
B: Components 9 to 14 are added to A and mixed and dispersed uniformly.
C: Components 15 to 17 are mixed and dispersed uniformly.
D: C and components 18 to 20 are added to B and mixed and dispersed.
E: After defoaming D, it was poured into a mold container (made of aluminum), solidified by cooling, and attached to the container to obtain a lip base.

  About Example 14, as a result of evaluating in the same manner as the evaluation method used in Examples 1 to 8, a smooth coating film that corrects unevenness of wrinkles on the lips is obtained. By applying lipstick thereon, Gloss, gloss over time, and color over time were better than when using only lipstick. Further, the lip base had excellent stability with no separation and discoloration over time.

Claims (11)

The following components (a) to (d);
(A) A block copolymer or graft copolymer in which a polymer portion having a LCST (Lower Critical Solution Temperature) lower than 37 ° C and a hydrophilic polymer portion is bonded to each other. A polymer compound (b) having a sol-gel transition temperature at a temperature higher than 0 ° C. and lower than 37 ° C. (b) water (c) fumed silicic acid (d) liquid oil agent, and component (c) An oily lip cosmetic, wherein the blending mass ratio (c) / (a) of the component (a) is 5/1 to 1/5 .   The oiliness according to claim 1, wherein the blending mass ratio (a) / (b) of the polymer compound of the component (a) and the water of the component (b) is 10/1 to 1/20. Lip cosmetic. Furthermore, lecithin is mix | blended as a component (e), The oily lip cosmetics of Claim 1 or 2 characterized by the above-mentioned. The oily lip cosmetic according to any one of claims 1 to 3 , wherein the liquid oil of component (d) contains a liquid oil having an IOB value of 0 to 0.5. The liquid oil agent of the said component (d) contains the 1 type (s) or 2 or more types chosen from the fatty acid ester of a polyhydric alcohol, and the polybasic acid ester of a higher alcohol, The any one of Claims 1-4 characterized by the above-mentioned. Oily lip cosmetic. The oily lip cosmetic according to any one of claims 1 to 4 , wherein the liquid oil of component (d) contains one or more selected from polybutene and heavy liquid isoparaffin. The structural unit of the polymer part having an LCST (Low Critical Solution Temperature) that is higher than 0 ° C. and lower than 37 ° C. constituting the polymer compound of the component (a) is a poly N-substituted acrylamide derivative, One or two selected from poly N-substituted methacrylamide derivatives and copolymers thereof, polypropylene oxide, copolymers of propylene oxide and other alkylene oxides, polyvinyl methyl ether, polyvinyl alcohol partial acetylated product, polyalkylene oxide The oily lip cosmetic according to any one of claims 1 to 6 , wherein the oily lip cosmetic is one or more species. The structural unit of the polymer part having an LCST (Low Critical Solution Temperature) that constitutes the polymer compound of the component (a) is higher than 0 ° C. and lower than 37 ° C. is poly-N-isopropylacrylamide, Poly-N-acryloylpiperidine, poly-N-propylmethacrylamide, poly-N, N-diethylacrylamide, poly-N-isopropylmethacrylamide, poly-N-cyclopropylacrylamide, poly-N-acryloylpyrrolidine, poly- It is 1 type, or 2 or more types chosen from N, N-ethylmethyl acrylamide, poly-N-cyclopropyl methacrylamide, and poly-N-ethyl acrylamide, In any one of Claims 1-6 characterized by the above-mentioned. Oily lip cosmetic. The structural unit of the polymer portion having an LCST (Lower Critical Solution Temperature) that is higher than 0 ° C. and lower than 37 ° C. constituting the polymer compound of the component (a) is a poly N-alkyl-substituted acrylamide derivative And poly N-alkyl-substituted methacrylamide derivative, polypropylene oxide, copolymer of propylene oxide and other alkylene oxide, polyvinyl methyl ether, polyvinyl alcohol partial acetylated product, polyalkylene oxide at least one structural unit, and hydrophilicity The oily lip cosmetic according to any one of claims 1 to 8 , which is a copolymer comprising a structural unit derived from a monomer and a structural unit derived from a hydrophobic monomer. The oily lip cosmetic according to any one of claims 1 to 9 , wherein the polymer compound of component (a) has a sol-gel transition temperature of 30 ° C or higher and lower than 37 ° C. The oily lip cosmetic according to any one of claims 1 to 10 , wherein the component (a) and the component (b) are mixed in advance and then mixed with other components.