JPH0377162B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to oil-based solid cosmetics that are water resistant, oil resistant, and friction resistant. This invention relates to oil-based solid cosmetics such as stick-type lipsticks and eyeliners, pencil-type cosmetics, etc., which are obtained by blending volatile oils and solid fats and oils with a temperature of 280°C or less. [Prior Art] Conventionally, volatile oils such as linear dimethylpolysiloxane, cyclic dimethylpolysiloxane, and low-boiling hydrocarbons are replaced with part or all of non-volatile liquid oils to apply cosmetics to the skin. Cosmetics, especially oil-based stick-type cosmetics, have been commercially available that attempt to prevent color transfer from the skin and mucous membranes by volatilizing liquid components from the applied body after application. Compared to cosmetics that do not contain volatile oils, such oil-based stick-type cosmetics have a tendency to be difficult to adhere to, for example, when an adherend such as paper or cloth is pressed onto the skin. It can reduce color transfer to the body. However, if the adherend is moved sideways while being pressed against the adherend, the coating material easily transfers to the adherend, and the abrasion resistance is poor, so that no color fading prevention effect can be expected. Furthermore, if a non-volatile liquid oil is applied over this application body, it may transfer from the application body to the adherend, or if it is applied to the lips,
The color starts to transfer due to the fats and oils in the food when you eat, and the oil resistance is not sufficient. Regarding the feeling of use, in the conventional method, in order to improve the effect of preventing color transfer, it is necessary to incorporate a larger amount of solid content (wax, powder, etc.) than in ordinary oil-based stick type cosmetics. Therefore, it has the disadvantage that it does not spread well during application, and after application, it has a strong dry feeling after the volatile oil has evaporated. [Problems to be Solved by the Invention] The present inventors have found that the coating material spreads well during coating, there is no feeling of bulkiness after coating, and the coating material can be easily attached to the adherend by shifting the adherend after application. We are developing stick-type, pencil-type, and other oil-based solid cosmetics that do not transfer, do not transfer color to the adherend, and do not easily discolor even if a nonvolatile liquid oil is later applied to the applied body. It's here. Under these circumstances, the present inventors conducted extensive research and found that when an oil-based solid cosmetic containing a specific oil-soluble polymer substance and a volatile oil agent is applied to the skin or mucous membranes, the volatile oil agent is released from the applied body. After volatilization, the interaction between the oil agent and the polymeric substance that is difficult to dissolve in the oil agent at a temperature around room temperature forms a mixed coating film of solid oil and polymeric substance, which presses onto adherends such as paper and cloth from above. Of course, just by guessing,
We completed the present invention by discovering that the color does not transfer easily even when side-shifting or reapplying liquid oil, and that this effect eliminates the need to add an excessive amount of solid components such as powder or wax, improving the feel of use. did. [Means for solving the problem] That is, the present invention provides an oil-soluble polymer substance with a boiling point of 280
Volatile oil agent below ℃ and penetration (JIS K-
2530) (25℃, 100g, 5 seconds) Contains a solid oil or fat of 40 or less as an essential component, and the oil-soluble polymer substance is a polymer or copolymer of a vinyl monomer having a long chain alkyl group of _C8 or more in the side chain. The present invention provides an oil-based solid cosmetic, characterized in that it is a polymer or a rubbery polymer selected from polyisoprene, ethylene propylene rubber, ethylene vinyl acetate copolymer, and polybutadiene. The relationship between the oil-soluble polymer substance, volatile oil agent, and solid oil used in the present invention is that the above-mentioned specific oil-soluble polymer substance dissolves or disperses in the volatile oil agent, but is not compatible with the solid oil and fat. has the relationship that it does not dissolve in volatile oils at temperatures below 40°C. The volatile oil used in the present invention has a boiling point of
Below 280℃, for example, viscosity 0.5~10cSt (25
℃) linear dimethylpolysiloxane, cyclic dimethylpolysiloxane with 3 to 6 members, chain length 3 to 16
Examples include straight chain or branched chain (saturated or unsaturated) hydrocarbons.
These may be used alone or in combination of two or more. Penetration used in the present invention (JIS K-2530)
(25℃, 100g, 5 seconds) As solid fats and oils of 40 or less, those conventionally used in cosmetics can be used, such as hydrocarbons with a melting point of 40℃ or higher, synthetic esters of alcohol and fatty acids, etc. Examples include waxes, natural waxes, higher alcohols, higher fatty acids, and the like. These may be used alone or in combination of two or more. Especially the penetration (JIS K-2530)
(25°C, 100g, 5 seconds) is preferably 0.5 to 20. Examples of polymers or copolymers of vinyl monomers having a long-chain alkyl group of C8 or _more in the side chain used in the present invention include (meth)acrylic esters, maleic esters, and fumaric esters of long-chain alkyl alcohols. , vinyl ether, higher fatty acid vinyl ester, α-olefin, and other polymers or copolymers are preferably used, and as the long-chain alkyl group, those having C ₈ to _{C 22} are particularly preferable.
Specifically, polystearyl acrylate, polybehenyl acrylate, polystearyl methacrylate, polybehenyl methacrylate, polystearyl vinyl ether, polyvinyl stearate,
Examples include C ₁₂ -α-olefin distearyl maleate copolymer and C ₁₂ -α-olefin distearyl fumarate copolymer. Particularly preferred are those having a molecular weight of 5,000 to 2,000,000. In addition, as a copolymer of alkyl (meth)acrylate having an alkyl group of C ₈ or more, a (meth)acrylic acid ester which combines an alkyl (meth)acrylate having an alkyl group of C ₈ or more and a fluorinated alkyl group is used. Copolymers of can also be preferably used, examples of which include the following. For example, alkyl (meth)acrylates having an alkyl group of C8 or _more include octyl alcohol, decyl alcohol, lauryl alcohol,
Examples include esters of (meth)acrylic acid and alcohols such as cetyl alcohol, stearyl alcohol, and behenyl alcohol, and any comonomer that can be copolymerized may be used. (Meth)acrylic acid ester comonomers to which a fluorinated alkyl group is bonded are particularly preferably used. Examples of the (meth)acrylic acid ester having a fluorinated alkyl group include known compounds having a polyfluoroalkyl group and a perfluoroalkyl group,
For example, CH ₂ = CHCOOC ₂ H ₄ C ₆ F ₁₃ , CH ₂ =
CHCOOC ₂ H ₄ C ₈ F ₁₇ , CH ₂ = CHCOOC ₂ H ₄ C ₁₀ F ₂₁ ,
CH ₂ = CHCOOC ₂ H ₄ C ₁₂ F ₂₅ , CH ₂ = C(CH ₃ )
COOC ₂ H ₄ C ₆ F ₁₃ , CH ₂ =C(CH ₃ )
COOC ₂ H ₄ C ₈ F ₁₇ , CH ₂ =C(CH ₃ )
COOC ₂ H ₄ C ₁₀ F ₂₁ , CH ₂ =C(CH ₃ )
COOC ₂ H ₄ C ₁₂ F ₂₅ , CH ₂ = CHCOOC ₂ H ₄ (−CF ₂ )−
₆ , _CH2 = _CHCOOC2H4 ( _-CF2 ) _-8H , _CH2 = _C
( _CH3 ) _COOC2H4 ( _-CF2 ) _-6H , _{CH2 =} C( _CH3 )
Examples include COOC ₂ H ₄ (−CF ₄ )− ₈ H. The copolymerization ratio of these long-chain alkyl (meth)acrylates and (meth)acrylic acid esters bonded with fluorinated alkyl groups is 10:1 to 1:5 (weight ratio) from the viewpoint of solubility, dispersibility, and stickiness. is preferred. In the present invention, the oil-soluble polymer substances exemplified above may be used alone or in combination of two or more. In preparing the oil-based solid cosmetic of the present invention, in addition to the above-mentioned essential ingredients, various conventionally used non-volatile oils, surfactants, wetting agents, preservatives, antioxidants, fragrances, powders, etc. Optional ingredients such as body and the like can be blended as appropriate. Examples of non-volatile oils include straight-chain or branched-chain hydrocarbons (which may be saturated or unsaturated), natural and synthetic ester oils of higher alcohols and fatty acids, lecithin, and the like. As surfactants, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil,
Examples include polyoxyethylene sorbitol fatty acid ester. Sorbitol as a wetting agent
Examples include glycerin, propylene glycol, 1,3-butylene glycol, maltitol, lactic acid, sodium lactate, polyethylene glycol, and the like. Examples of the preservative include paraoxybenzoic acid alkyl ester, sodium benzoate, potassium sorbate, and phenoxyethanol.
Examples of antioxidants include tocopherol, cezamol, cezamorin, and the like. As a powder,
Examples include titanium oxide, zinc oxide, ultramarine blue, chromium oxide, iron oxide, talc, sericite, mica, kaolin, titanium mica, and organic pigments. The blending amount of the volatile oil agent in the oil-based solid cosmetic of the present invention is generally preferably 5 to 80% by weight, more preferably 20 to 60% by weight. 80% by weight
If the amount is more than 5, it will not be possible to form a solid raw material.
If it is less than % by weight, the volatile oil agent will have no effect. The amount of solid oil and fat blended in the present invention is generally 5
~60% by weight is preferred, more preferably 15-45%
Weight%. If the amount exceeds 60% by weight, coating performance or so-called "adhesion" will deteriorate. If the amount is less than 5% by weight, stick shapes, pencil shapes, etc. will not be formed. The weight ratio of solid oil to volatile oil is 0.1
-2 is preferable, and the range of 0.2-1 is more preferable. The blending amount of the oil-soluble polymer substance in the cosmetic composition of the present invention is preferably 0.1 to 50% by weight based on the volatile oil agent. More preferably, it is 1 to 30% by weight.
If it is less than 0.1% by weight, the abrasion resistance will be weak, and if it is more than 50% by weight, it will become sticky or uneven during application, which is undesirable. The cosmetic of the present invention can be prepared by, for example, heating and mixing the essential ingredients, such as an oil-soluble polymer substance, a volatile oil agent, and a solid oil, as well as optional ingredients, using a homomixer, homodisper, triple roll, etc. , prepared by forming it into a predetermined shape. The cosmetics of the present invention include foundations, lipsticks, eyeliners, eye shadows, eyebrows,
It can be in the form of a make-up cosmetic such as almost red. The breakage strength of the oil-based solid cosmetic obtained in this way is 40 g or more in a cylindrical shape with a diameter of 12 mm at 25°C, and from 150 g to 800 g due to shape retention and feeling of use.
Preferably between g. [Example] Hereinafter, the present invention will be explained in more detail with reference to Examples. Example 1 Polystearyl methacrylate, polybehenyl methacrylate, polystearyl vinyl ether, polyisoprene, ethylene propylene rubber, or ethylene/vinyl acetate copolymer was used as the oil-soluble polymer, and low-boiling isoparaffin (IP Solvent 1620, Idemitsu) was used as the volatile oil. Formulation A shown in Table 1 was prepared using cyclic dimethylpolysiloxane (SH-244, manufactured by Toray Silicone Co., Ltd.)
A lipstick was manufactured using the manufacturing method shown below, and its color transfer prevention effect was evaluated. In addition, there are also those in which ceresin and titanium mica are blended in excess instead of an oil-soluble polymer substance (Table 1 Prescription B), and those in which liquid paraffin is blended in place of an oil-soluble polymer substance and volatile oil agent (Table 1 Prescription). C) was used as a comparative product. Lipstick manufacturing method During the formulation, 4 parts by weight of IP Solvent 1620, 1 part by weight of Ceresin, and 1 part by weight of Red No. 202 are made into a paste using three rolls, and the whole is heated and mixed in an airtight container at 90℃ for 30 minutes. After that, pour it into the specified mold.
Cooled at 5°C for 20 minutes. Color transfer evaluation method Color transfer is evaluated by applying lipstick to human skin in an area of 1 cm ² until the skin color is no longer visible, leaving it for 1 minute, then pressing it with a certain amount of pressure from above using tissue paper, and applying it to the human skin until the skin color is no longer visible. When it is moved sideways by the force of
The color density of the lipstick adhered to the tissue paper was visually evaluated according to the following criteria. (Evaluation criteria) The color of the lipstick paper is 0, and the density of the color of the lipstick that adheres when the lipstick according to prescription C in Table 1 is pressed from above with the tissue paper and when it is moved sideways is evaluated as 5. did. Furthermore, apply 1 cm ² of lipstick to the skin until the skin color is no longer visible, leave it for 1 minute, then drop one drop of liquid paraffin from above using a capillary, and press it with tissue paper. The color transfer of the lipstick was evaluated based on the above criteria. The formulation of the lipstick is shown in Table 1, and the evaluation results of color transfer to tissue paper are shown in Table 2.

【table】

[Prescription]

Polystearyl methacrylate 10 parts by weight IP Solvent 1620 16 〃 SH244 30 〃 Chianderilla wax 7 〃 Ceresin 18 〃 Sericite 10 〃 Kaolin 5 〃 Red iron 3 〃 Yellow iron oxide 0.5 〃 Fragrance 0.5 〃 Total 100 〃 Gain The foundation that was It was an oil-based stick-type foundation that was extremely slippery, did not give a dry feeling after application, and was resistant to color transfer. or,
The breaking strength was 80g. Example 3 An oil-based static eyeliner was produced using the following formulation, and its color transfer prevention effect and breakage strength (25°C) were evaluated. [Formulation] Ethylene/propylene rubber 10 parts by weight IP Solvent 1620 15 〃 SH244 25 〃 Candelilla wax 7 〃 Microcrystalline wax 18 〃 Solid paraffin 10 〃 Black iron oxide 14.5 〃 Fragrance 0.5 〃 Total 100 〃 Obtained The eyeliner was It's an oil-based stick-type eyeliner that glides on easily, is resistant to sebum and sweat, and is resistant to color transfer. Moreover, the breaking strength was 70g. Example 4 Oil-based pencil-type eyebrows were manufactured using the following formulation, and the color transfer prevention effect and breakage strength (25°C) were evaluated. [Formulation] Stearyl methacrylate/perfluoroalkyl methacrylate copolymer ^* 1 10 parts by weight IP Solvent 1620 15 〃 SH244 20 〃 Candelilla wax 12 〃 Microcrystalline wax 18 〃 Solid paraffin 10 〃 Black iron oxide 10.5〃 Fragrance 0.5 Total 100〃 (Note) *1: Weight ratio of stearyl methacrylate and perfluoroalkyl methacrylate 3/1
A copolymer of CH ₂ =C(CH ₃ )- as perfluoroalkyl methacrylate.
COOC ₂ H ₄ C ₈ F ₁₇ was used. The obtained eyebrow was an oil-based pencil type eyebrow that had good sliding properties, was resistant to sebum and sweat, and was resistant to color transfer. Moreover, the breaking strength was 75g.

Claims (1)

[Scope of Claims] 1. Oil-soluble polymeric substance, volatile oil having a boiling point of 280°C or less, and penetration (JIS K-2530) (25°C, 100°C)
g, 5 seconds) Polymers or copolymers of vinyl monomers containing 40 or less solid fats and oils as an essential component, and the oil-soluble polymer substance has a long chain alkyl group of C ₈ or more in the side chain, or polyisoprene , ethylene propylene rubber, ethylene vinyl acetate copolymer, and polybutadiene. 2. The oil-based solid cosmetic according to claim 1, wherein the solid oil does not dissolve in the volatile oil at temperatures below 40°C. 3 Breakage strength is 12 mm diameter cylindrical shape at 25°C.
The oil-based solid cosmetic according to claim 1, which has a weight of 40 g or more. 4. The oil-based solid cosmetic according to claim 1, wherein the content of the volatile oil in the entire oil-based solid cosmetic is 5 to 80% by weight and 5 to 60% by weight of the solid oil. 5 The amount of oily polymer substance is 0.1% of volatile oil agent.
50% by weight of the oil-based solid cosmetic according to claim 1. 6 A polymer or copolymer of a vinyl monomer having a long chain alkyl group of C ₈ or more in the side chain has C ₈ to
( _meth )acrylic acid ester, vinyl ether, vinyl ester, α-
The oil-based solid cosmetic according to claim 1, which is a (co)polymer of olefin or α-olefin and maleic acid or fumaric acid ester.