JP6192632B2 - Cosmetics - Google Patents

Description

  The present invention relates to an improvement in the storage stability of cosmetics, particularly cosmetics containing an acrylic polymer having a dendrimer type siloxane structure in the side chain and 2-ethylhexyl paramethoxycinnamate.

  Acrylic polymer having a dendrimer type siloxane structure in the side chain forms a film with higher sebum resistance and water resistance than conventional silicone-modified acrylic polymers having a chain type siloxane structure in the side chain. It is known that it is blended into cosmetics as an agent to improve makeup retention of makeup cosmetics (Patent Documents 1 and 2 etc.).

However, when this acrylic polymer is used in combination with 2-ethylhexyl paramethoxycinnamate, which is an organic ultraviolet absorber, the storage stability, particularly the storage stability at low temperatures, is reduced and the film effect such as long-lasting makeup is sufficient. There was a problem that it was not demonstrated.
JP 2000-63225 A JP 2003-226611 A

  The present invention has been made in view of the above-mentioned background art, and its purpose is to improve the storage stability when an acrylic polymer having a dendrimer type siloxane structure in the side chain and 2-ethylhexyl paramethoxycinnamate are used in combination. It is to provide cosmetics with excellent makeup and feeling of use.

  As a result of intensive studies by the present inventors in order to achieve the above object, a liquid oil that dissolves an acrylic polymer having a dendrimer-type siloxane structure in the side chain and 2-ethylhexyl paramethoxycinnamate has a specific range of Si. By adjusting to the / C value, it was found that the above problem was solved, and the present invention was completed.

That is, the present invention provides a water-in-oil emulsified cosmetic comprising the following components (a) to (d).
(A) Acrylic polymer having 0.15 to 10% by mass of dendrimer type siloxane structure in the side chain (b) 1.0 to 7.5% by mass of 2-ethylhexyl paramethoxycinnamate (c) 1 to 70% %, The average value obtained by weighting the ratio of the number of silicon atoms to the number of carbon atoms of each compound constituting the liquid oil component according to the mass ratio of each compound is 0.374 to 0.455. Oil content. However, (a) an acrylic polymer having a dendrimer type siloxane structure in the side chain and (b) 2-ethylhexyl paramethoxycinnamate are excluded.
(D) Water of 34.8% by mass or less.

In addition, the Si / C weighted average value in the liquid oil component (c) is a value obtained by weighting the Si / C values of each oil component constituting the liquid oil component according to the mass ratio and averaging them. For example, the liquid oil content is 20 parts by mass of silicone oil c1 (Si / C = 0.5), 10 parts by mass of silicone oil c2 (Si / C = 0.2), and non-silicone oil c3 (Si / C = 0). When the mixed oil component is 10 parts by mass, the Si / C weighted average value of this liquid oil component is
(0.5 × 20 + 0.2 × 10 + 0 × 10) / (20 + 10 + 10) = 0.3
Is calculated.
Moreover, the liquid oil component (c) is an oil component that exhibits a liquid state at 20 ° C. as a whole. The liquid state means a state having fluidity in the gradient method.

In the cosmetic according to the present invention, the liquid oil component (c) is composed of one or more selected from the group consisting of silicone oil, hydrocarbon oil, higher fatty acid, higher alcohol, and ester oil. The cosmetics characterized by the above.
In addition, the present invention provides a cosmetic, wherein in any of the cosmetics, the liquid oil component (c) further contains ethanol.
In addition, the present invention provides a cosmetic characterized in that in any one of the cosmetics described above, the component (c) is contained 1.5 times or more in mass with respect to the total amount of the component (a) and the component (b). .
Furthermore, this invention provides the sunscreen cosmetics and makeup cosmetics which consist of one of the said cosmetics.
Furthermore, the present invention provides the cosmetic according to any one of the above, wherein the component (c) is selected from decamethylcyclopentasiloxane, methylphenylpolysiloxane, caprylylheptamethyltrisiloxane, and dimethylpolysiloxane. Provided is a cosmetic comprising two or more kinds.

  According to the present invention, (a) the acrylic polymer having a dendrimer-type siloxane structure in the side chain and (b) 2-ethylhexyl paramethoxycinnamate are dissolved in (c) a liquid oil adjusted to specific Si / C. Thus, a cosmetic is provided that has high stability even when stored at low temperatures, and has excellent makeup durability and feeling of use.

(A) Acrylic polymer component having a dendrimer-type siloxane structure in the side chain The acrylic polymer having a dendrimer-type siloxane structure in the side chain of the component (a) is an acrylic polymer as a main chain, and a dendrimer-type polysiloxane in the side chain. It is what you have. Dendrimer refers to a resinous polymer having highly regular branches radially from one nucleus.
Examples of the acrylic polymer of the present invention include polymers having a monomer represented by the following general formula (1) as a constituent monomer.

In general formula (1), R is a hydrogen atom or a methyl group, preferably a methyl group.
A is an alkylene group having 1 to 10 carbon atoms, preferably a methylene group, an ethylene group or a propylene group, particularly preferably a propylene group.
D is a group corresponding to a dendrimer type polysiloxane, and is represented by the following general formula (2).

R ¹ is an alkyl group having 1 to 10 carbon atoms or an aryl group, and examples of the alkyl group include a methyl group, a methyl group, a propyl group, a butyl group, a pentyl group, an isopropyl group, an isobutyl group, a cyclopentyl group, and a cyclohexyl group. And examples of the aryl group include a phenyl group and a naphthyl group. Among these, a methyl group and a phenyl group are preferable, and a methyl group is particularly preferable.
X ¹ is a silylalkyl group represented by the following formula (3) when i = 1.

In formula (3), R ¹ is the same as described above.
R ² is an alkylene group having 2 to 10 carbon atoms, and a linear alkylene group such as ethylene group, propylene group, butylene group, hexylene group; methylmethylene group, methylethylene group, 1-methylpentylene group, 1 And a branched alkylene group such as 1,4-dimethylbutylene group. Among these, an ethylene group, a methylethylene group, a hexylene group, a 1-methylpentylene group, and a 1,4-dimethylbutylene group are preferable, and an ethylene group is particularly preferable.
R ³ is an alkyl group having 1 to 10 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, and an isopropyl group.

X ^{i + 1} is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group, and the silylalkyl group.
a ¹ is an integer of 0 to 3.
i is an integer of 1 to 10, and represents the number of layers of the silylalkyl group, that is, the number of repetitions of the silylalkyl group.
Therefore, when the number of layers is 1, the dendrimer type polysiloxane structure D is represented by the following general formula (4), which is a preferable example of the dendrimer type polysiloxane structure of the component (d) of the present invention. one of.

In General Formula (4), R ¹ , R ² , and R ³ are the same as described above, and R ⁴ is the same as a hydrogen atom or R ¹ . a ¹ is the same as the above a ¹ , but the average total number of a ^{1 in} one molecule is 0-7.
Moreover, the group shown by following General formula (5) is mentioned as one of the suitable dendrimer type polysiloxane structures.

  In addition to the dendrimer-type polysiloxane-containing (meth) acrylic acid-based monomer represented by the general formula (1), the acrylic polymer of the present invention includes other (meth) acrylic acid alkyl ester monomers as constituent monomers. An acrylic polymer is preferred. For example, lower alkyl (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate; glycidyl (meth) acrylate; (meth) N-butyl acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, (meth) Examples include higher (meth) acrylates such as octyl acrylate, lauryl (meth) acrylate, and stearyl (meth) acrylate. In the present invention, it is preferable to have at least methyl methacrylate as a constituent monomer.

  Furthermore, the acrylic polymer of the present invention can contain other vinyl monomers as constituent monomers. For example, lower fatty acid vinyl esters such as vinyl acetate and vinyl propionate; higher fatty acid esters such as vinyl butyrate, vinyl caproate, vinyl 2-ethylhexanoate, vinyl laurate, vinyl stearate; styrene, vinyl toluene, benzyl (meta ) Aromatic vinyl monomers such as acrylate, phenoxyethyl (meth) acrylate, vinyl pyrrolidone; (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, isobutoxymethoxy (meth) Amide group-containing vinyl monomers such as acrylamide and N, N-dimethyl (meth) acrylamide; Hydroxyl-containing vinyl monomers such as hydroxyethyl (meth) acrylate and hydroxypropyl alcohol (meth) acrylate; Acu Carboxylic acid-containing vinyl monomers such as phosphoric acid, itaconic acid, crotonic acid, fumaric acid, maleic acid, tetrahydrofurfuryl (meth) acrylate, butoxyethyl (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, polyethylene glycol ( (Meth) acrylate, polypropylene glycol mono (meth) acrylate, ether type vinyl monomers such as hydroxybutyl vinyl ether, cetyl vinyl ether, 2-ethylhexyl vinyl ether; (meth) acryloxypropyltrimethoxysilane, (meth) at one end Unsaturated group-containing silicone compounds such as polydimethylsiloxane containing an acrylic group and polydimethylsiloxane containing a styryl group at one end; butadiene; vinyl chloride; vinylidene chloride; (Meth) acrylonitrile; dibutyl fumarate; maleic anhydride; dodecyl succinic anhydride; (meth) acrylic glycidyl ether: radically polymerizable unsaturated carboxylic acids such as (meth) acrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic acid Alkali metal salts, ammonium salts, organic amine salts; radical polymerizable unsaturated monomers having a sulfonic acid group such as styrenesulfonic acid, and alkali metal salts, ammonium salts, organic amine salts thereof; 2-hydroxy- Quaternary ammonium salts derived from (meth) acrylic acid such as 3-methacryloxypropyltrimethylammonium chloride, methacrylic acid esters of alcohols having tertiary amine groups such as diethylamine methacrylate, and their quaternary ammonium Salt is an example Is done.

  Polyfunctional vinyl monomers can also be used. For example, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, ethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, Polyethylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane trioxyethyl (meth) Such as acrylate, tris (2-hydroxyethyl) isocyanurate di (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, and styryl-blocked polydimethylsiloxane. KazuHajime containing silicone - emission compounds and the like.

Furthermore, vinyl monomers containing fluorinated organic group may be used, for example, the general formula: are preferably used those represented by CH 2 ₌ CR ⁵ COOR ^f. In the formula, R ⁵ is a hydrogen atom or a methyl group, and R ^f is a fluorinated organic group, for example, — (CH ₂ ) x — (CF ₂ ) y —R ⁶ [x = 0 to 3 is an integer, a linear or branched fluoroalkyl group represented by y = 1 to 20; R ⁶ = H, F, —CH (CF ₃ ) ₂ or —CF (CF ₃ ) ₂ ], —CH ₂ CH ₂ - is _{[OCF 2 CF (CF 3)} ] n -OC 3 F 7 [m = 0 or 1, n = 0 to 5 integer, ^{R 7} is F or ^{_{CF 3 - (CF 2) m}} -CFR 7 ] The fluoroalkyloxyfluoroalkylene group represented by this is mentioned.

The acrylic polymer having a dendrimer-type polysiloxane structure of the present invention in the side chain can be produced by polymerizing the monomer using a known method such as a radical polymerization method. The radical polymerization can be performed, for example, by heating in a solution using a radical initiator, and a chain transfer agent can be added as necessary. Specifically, for example, it can be produced according to the methods described in Patent Documents 1 and 2.
The number average molecular weight of the acrylic polymer is preferably 3,000 to 2,000,000, more preferably 5,000 to 800,000.

Also, commercially available acrylic polymers of component (a) of the present invention is also available, for example, ^{Dow Corning (R) FA4001CM Silicone Acrylate} [( acrylates / methacrylate polymethyl trimethylsiloxy) 30% copolymer and decamethylcyclopentasiloxane mixtures of 70%, manufactured by Dow Corning Toray silicone Co., ^{Ltd.], Dow Corning (R) FA4002ID} silicone Acrylate [( acrylates / methacrylate polymethyl trimethylsiloxy) mixture of 40% copolymer and 60% isododecane, Toray Dow Corning Silicone Co., Ltd.].

  The compounding quantity of a component (a) is 0.15 to 10% as solid content in cosmetics, Preferably it is 0.3 to 8%, More preferably, it is 1 to 7%. When the amount is too small, a sufficient film effect cannot be obtained. On the other hand, when it is excessively mixed, the feeling of use may be lowered.

(B) 2-Ethylhexyl paramethoxycinnamate Component (b) 2-ethylhexyl paramethoxycinnamate (octylmethoxycinnamate) is an ultraviolet absorber that is oily at room temperature. For example, “Pulsol MCX” (DSM Nutrition) Japan) can be easily used.
Although the compounding quantity of a component (b) can be suitably set according to the target ultraviolet absorption effect, it is 0.1 to 12% normally in cosmetics, Preferably it is 0.5 to 7.5%. More preferably, it is 1 to 7.5%.

In addition, in this invention, unless the effect of this invention is impaired, organic ultraviolet absorbers other than paramethoxycinnamate 2-ethylhexyl can also be mix | blended.
Examples of such organic ultraviolet absorbers include those usually used in cosmetics. For example, benzoic acid UV absorbers (for example, paraaminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester, N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, N, N-dimethyl PABA ethyl ester, etc.); anthranilic acid UV absorbers (for example, homomenthyl-N-acetyl anthranilate, etc.); salicylic acid UV absorbers ( For example, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc .; Methyl-2,5-diisopropylcin Namate, ethyl-2,4-diisopropylcinnamate, methyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, 2-ethoxyethyl -p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl- Diparamethoxycinnamate, etc.); benzophenone ultraviolet absorbers (eg, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4- Toxi-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4- n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.); 3- (4′-methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor; 2-phenyl-5-methyl Benzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole; 2- (2'-hydroxy-5'-methylphenyl) Examples include benzotriazole; dibenzalazine; dianisoylmethane; 4-methoxy-4′-t-butyldibenzoylmethane; 5- (3,3-dimethyl-2-norbornylidene) -3-pentan-2-one.

(C) The liquid oil component (c) is composed of one or more oil components, and is adjusted so that the Si / C weighted average value of the entire liquid oil component is 0.25 to 0.46. The The oil component constituting the liquid oil component may contain a solid oil component as long as it exhibits a liquid state at 20 ° C. as a whole, but preferably comprises only a liquid oil component.
Preferable examples of the oil constituting the liquid oil include non-silicone oils such as hydrocarbon oils, higher fatty acids, higher alcohols, and ester oils in addition to silicone oils. Silicone oil is an essential oil component for adjusting the Si / C weighted average value of the liquid oil component to the above range.

Examples of the silicone oil include linear polysiloxane (eg, dimethylpolysiloxane, methylphenylpolysiloxane, etc.) or cyclic polysiloxane (eg, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.). ), Caprylyl heptamethyltrisiloxane, methylphenyl polysiloxane, diphenyl polysiloxane and the like. In addition, modified silicone oils such as alkyl-modified silicone and fluorine-modified silicone are also included.
In addition, silicone derivatives (for example, polyoxyalkylene-modified silicone, polyglycerin-modified silicone, etc.) having a hydrophilic group such as a silicone-based surfactant are not included in the constituent oil component (c).

Examples of the hydrocarbon oil include liquid paraffin, squalane, squalene and the like.
Examples of the higher fatty acid include oleic acid, isostearic acid, linoleic acid, linolenic acid, and the like.
Examples of the higher alcohol include monostearyl glycerin ether (batyl alcohol), 2-decyltetradecinol, lanolin alcohol, hexyl decanol, isostearyl alcohol, octyldodecanol and the like.

  Ester oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, flaxseed oil, saury Natural oils such as flower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagiri oil, Japanese kiri oil, jojoba oil, germ oil, etc .; isopropyl myristate, cetyl octanoate, myristin Octyldodecyl acid, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, 12-hydroxy Stearate Steryl, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, tri-2 -Trimethylolpropane ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glycerin tri-2-ethylhexanoate, glyceryl trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate , Cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, glyceride tri-2-heptylundecanoate, castor oil fatty acid methyl ester, oleic acid Rail, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2 sebacate Synthetic ester oils such as -ethylhexyl, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate and the like.

  The compounding quantity of a component (c) is set normally in 1-70 mass%, typically 1-50 mass%. The component (c) is preferably used in an amount capable of stably dissolving the component (a) and the component (b), and typically 1 relative to the total amount of the component (a) and the component (b). Use 5 times mass or more.

  The cosmetic of the present invention may be blended with other components that can be usually blended in cosmetics as long as the effects of the present invention are not impaired. For example, powder components, solid fats and oils, waxes, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, humectants, UV absorbers, UV scattering agents, water-soluble polymers, thickeners , Film agent, sequestering agent, lower alcohol, polyhydric alcohol, sugar, amino acid, organic amine, polymer emulsion, pH adjuster, skin nutrient, vitamin, antioxidant, antioxidant assistant, fragrance, water, etc. Can be appropriately blended as necessary.

  The dosage form of the cosmetic of the present invention is arbitrary, and is a solution system, a solubilization system, an emulsification system, a powder dispersion system, a water-oil two-layer system, a water-oil-powder three-layer system, a gel, a mist, a spray, or a mousse. , Roll-on, stick, etc. are not particularly limited. Further, a preparation impregnated or coated on a sheet such as a nonwoven fabric is also possible.

Further, the form of the cosmetic of the present invention is not limited, and facial cosmetics such as lotion, emulsion, cream and pack; makeup cosmetics such as foundation, lipstick, eye shadow, eyeliner, eyebrow, mascara, blusher and nail polish Sunscreen cosmetics (sunscreen agents); body cosmetics; aromatic cosmetics; hair cosmetics such as hair liquids, hair tonics, hair conditioners, rinses, hair restorers, hair styling agents; ointments and the like. The present invention is particularly useful in makeup cosmetics and sunscreen cosmetics.
Hereinafter, the present invention will be described with reference to specific examples, but the present invention is not limited thereto.

Test Example 1 Stability in oil components Each component was mixed according to Tables 1 and 2 below, and the mixture after storage at -5 ° C for 1 month was subjected to precipitation, phase separation, transparency (transparency: ◯, translucent) : Δ, cloudiness: ×) was visually evaluated.

As shown in Tables 1 and 2, both the dendrimer-type siloxane-containing acrylic polymer and 2-ethylhexyl paramethoxycinnamate are stably dissolved in general-purpose silicone oil (Si / C = 0.5) alone (Test Example) 1-1, Test Example 1-2), and when these are used in combination, precipitation and phase separation occur over time (Test Example 1-3 to Test Example 1-5).
On the other hand, when the Si / C of the liquid oil is changed to 0.46 or less, precipitation or phase separation does not occur even when the dendrimer-type siloxane-containing acrylic polymer and 2-methoxyhexyl paramethoxycinnamate are used in combination. It was possible to obtain a stable oil phase (Test Examples 1-7 to 1-13). However, even with such a liquid oil, if the amount of the liquid oil is small relative to the total amount of the dendrimer-type siloxane-containing acrylic polymer and 2-ethylhexyl paramethoxycinnamate, the stability over time tends to decrease. (Test Example 1-6).

Test Example 2 Stability in Emulsified Cosmetics Table 3 shows the results of examining the storage stability and the feeling of use when the above oil phase is used as an emulsified cosmetic. From Table 3, it can be seen that also in emulsified cosmetics, the storage stability at low temperature is improved and the makeup and moisturizing effect is improved by adjusting the Si / C of the liquid oil as in Tables 1 and 2 above. .

(Production method)
Oil components (components 1 to 4) and components 5 to 7 are mixed uniformly, component 8 is added, and dispersed with a homomixer. Thereafter, powder (components 9 to 15) is added and dispersed with a homomixer.
In this dispersion, the water phase part in which the components 16 to 20 are dissolved is gradually added with stirring and emulsified. Then, the homomixer process was performed and the emulsified particle was uniformly prepared and the W / O type creamy foundation was obtained.

(Stability)
The appearance after the sample was stored at 50 ° C., room temperature, and −5 ° C. for 1 month was visually evaluated.
○: Separation, oil floatation, increase in emulsified particle size, etc. are not observed at all.
Δ: No clear separation is observed, but slight oil floating,
There is a slight increase in emulsified particles compared to the initial preparation.
X: Separation and oil floating are observed, and an apparent increase in emulsified particles is observed compared to the initial preparation.

(Feeling of use)
In the stability test, the sample after storage at −5 ° C. was applied to the skin, and the makeup, oiliness, and stickiness were evaluated according to the following criteria. Specifically, sensory tests were carried out by actually using samples by 10 panelists specializing in evaluation.
○: Eight or more out of 10 people judged that each evaluation item was good.
(Triangle | delta): 5 to less than 8 out of 10 judged that each evaluation item was favorable.
X: Less than 5 out of 10 people judged good.

Test Example 3 Si / C
Table 4 shows the results of examining the storage stability and the feeling of use by changing the Si / C value of the liquid oil. From Table 4, when Si / C is high, storage stability and makeup moisturizing effect are low, and when Si / C is low, oiliness and stickiness are produced and the feeling of use is lowered, and the cosmetic moisturizing effect tends to be lowered. It is understood that there is.
In view of the above, it is preferable to adjust the Si / C of the liquid component to a range of 0.25 to 0.46 in order to obtain a cosmetic with high storage stability and excellent makeup and feeling of use. It is believed that there is.

(Production method)
In the same manner as in Table 3, a W / O type emulsion foundation was obtained.

  Hereinafter, the formulation example of the cosmetics concerning this invention is shown. A compounding quantity is shown by the mass%. All the cosmetics were excellent in storage stability, cosmetic durability, and usability.

Formulation Example 1: O / W emulsion foundation

(Production method)
Dissolve water phase components 1 to 4, add component 5 and uniformly disperse with a homomixer. Thereafter, powder components 6 to 10 are added, uniformly dispersed with a homomixer, neutralizer component 24 is added and dissolved, and heated to about 70 ° C. (powder dispersed aqueous phase).
The oil phase components 11 to 23 are heated and dissolved at about 70 ° C., added to the aqueous phase, and the emulsified particles are uniformly prepared with a homomixer. Then, it cooled to about 30 degreeC and obtained the target foundation.

Formulation Example 2: Oily foundation

(Production method)
Liquid components 1-7 are mixed uniformly, and powder components 8-13 are added. Then, it uniformly disperse | distributed with the homomixer and the target oil-based foundation was obtained.

Formulation Example 3: Makeup Base

(Production method)
Oil phase components 1 to 6 are mixed uniformly, component 7 is added, and dispersed uniformly with a homomixer. Thereafter, powder components 8 to 12 are added and uniformly dispersed with a homomixer (powder dispersed oil phase).
An aqueous phase component in which components 13 to 20 were dissolved was added to the oil phase, and the emulsified particles were uniformly prepared with a homomixer to obtain a desired makeup base.

Formulation Example 4: W / O Sunscreen

(Production method)
Oil phase components 1 to 7 are mixed uniformly, and powder components 8 and 9 are added. Add the aqueous phase component that is uniformly dispersed with a homomixer and in which the components 10 to 15 are dissolved. The emulsified particles were uniformly prepared with a homomixer to obtain the intended sunscreen.

Claims (5)

A water-in-oil emulsified cosmetic comprising the following components (a) to (d):
(A) Acrylic polymer having 0.15 to 10% by mass of dendrimer type siloxane structure in the side chain (b) 1.0 to 7.5% by mass of 2-ethylhexyl paramethoxycinnamate (c) 1 to 70% %, The average value obtained by weighting the ratio of the number of silicon atoms to the number of carbon atoms of each compound constituting the liquid oil component according to the mass ratio of each compound is 0.374 to 0.455. Oil content. However, (a) an acrylic polymer having a dendrimer-type siloxane structure in the side chain and (b) 2-ethylhexyl paramethoxycinnamate are excluded.
(D) Water of 34.8% by mass or less.   2. The water-in-oil emulsified cosmetic according to claim 1, wherein the component (a) is an (acrylates / polytrimethylsiloxy methacrylate) copolymer.   3. The water-in-oil emulsified cosmetic according to claim 1, which contains ethanol.   The cosmetic in any one of Claims 1-3 WHEREIN: The component (c) is 1.5 times mass or more with respect to the total amount of a component (a) and a component (b), The water-in-oil type characterized by the above-mentioned. Emulsified cosmetic.   The cosmetic according to any one of claims 1 to 4, wherein the component (c) is one or two selected from decamethylcyclopentasiloxane, methylphenylpolysiloxane, caprylylheptamethyltrisiloxane, and dimethylpolysiloxane. A water-in-oil emulsified cosmetic comprising at least one species.