JP4827433B2 - Oil-in-water emulsified skin cosmetic - Google Patents

Description

  The present invention relates to an oil-in-water emulsified skin cosmetic. More specifically, the present invention relates to an oil-in-water emulsified skin cosmetic that is excellent in usability (skin extension, skin familiarity, stickiness, freshness, emollient feeling, stickiness) and excellent in stability over time.

  Conventionally, oil-in-water skin cosmetics have higher fatty acids such as stearic acid, palmitic acid, myristic acid, behenic acid, petrolatum, carnauba wax, etc. to produce a moist, rich, smooth and emollient feeling. A method of emulsifying solid oils such as waxes such as candelilla wax, ceresin and microcrystalline wax, and higher alcohols such as lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, and behenyl alcohol with an emulsifier is used. In order to suppress crystallization of these solid oils over time, liquid paraffin, squalane and other liquid oils that are compatible with the solid oils at room temperature, cetyl palmitate, isopropyl isostearate, isodecyl pivalate, Attempts have been made to avoid crystal precipitation of solid oil by blending an ester oil having a relatively long carbon chain, such as oleyl oleate, having a carbon chain comparable to that of solid oil (see Non-Patent Document 1, for example). ).

  However, the oil-in-water skin cosmetics prepared by the method as described above, when applied to the skin, are excellent in stability and emollient, but are poorly fit to the skin and sticky. It was not satisfactory in terms of sex.

  On the other hand, when no solid oil is blended, there is a problem that there is no emollient feeling, although it is excellent in terms of stability over time, spreading and skin conformance, and no stickiness.

"Latest Cosmetic Science" (Revised Supplement II) edited by Japan Society of Engineers, Yakuji Nippo, July 10, 1992, p49

  An object of the present invention is to provide an oil-in-water skin cosmetic that is excellent in stability over time and usability (skin spreading, skin familiarity, stickiness, refreshment, emollient feeling, and feeling of elasticity).

In order to solve the above problems, the present invention provides (a) 0.5 to 5.0% by mass of a higher alcohol that is solid to semisolid at room temperature (25 ° C.), and (b) the following general formula (I):

(In the formula, R ₁ represents an alkyl group having 7 to 8 carbon atoms; R ₂ represents an alkyl group having 3 to 13 carbon atoms)
1.0 to 20.0% by mass of one or more of the branched monoesters represented by the formula: (c) (c-1) glycerin fatty acid ester and (c-2) hydrophilic polyethylene glycol fatty acid esters 1.0 to 8.0% by mass of an emulsifier comprising: (c-1) component: (c-2) component = 1: 1 to 6: 1 (mass ratio), and Trichodesmalanicum (Trichodesmalanicum) ) When the seed extract is contained, an oil- in- water emulsified skin cosmetic is provided , the amount of which is less than 0.50% by mass .

  Further, in the present invention, the component (b) is 2-ethylhexyl 2-ethylhexanoate, isononyl 2-ethylhexanoate, isotridecyl 2-ethylhexanoate, 2-ethylhexyl isononanoate, isononyl isononanoate, isodecyl isononanoate, And the above oil-in-water liquid crystal emulsified skin cosmetic, which is one or more selected from isotridecyl isononanoate.

Moreover, this invention provides the said oil-in-water type emulsified skin cosmetic whose (c) component is (c-1) component: (c-2) component = 1: 1 to 3 : 1 (mass ratio). .

  Moreover, this invention provides the said oil-in-water type emulsified skin cosmetics further containing a triglyceride.

  Moreover, this invention provides the said oil-in-water type emulsified skin cosmetic whose triglyceride is a meadow foam oil and / or jojoba oil.

  Moreover, this invention provides the said oil-in-water type emulsified skin cosmetics whose compounding quantity of a triglyceride is 3.0-10.0 mass%.

  The oil-in-water emulsified skin cosmetic of the present invention is extremely excellent in stability over time and usability (skin spread, skin familiarity, stickiness, refreshment, emollient feeling, and feeling of elasticity).

  Hereinafter, the present invention will be described in detail.

  (A) Examples of higher alcohols exhibiting a solid to semi-solid at room temperature (25 ° C.) include lauryl alcohol, myristyl alcohol, cetearyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, isostearyl alcohol, aralkyl alcohol, batyl alcohol, Kimyl alcohol, carnervir alcohol, ceryl alcohol, coryranyl alcohol, myricyl alcohol, lacteryl alcohol, elaidyl alcohol, isostearyl glyceryl ether, octyl alcohol, triacontyl alcohol, selachyl alcohol, cetostearyl alcohol, oleyl alcohol Lanolin alcohol, hydrogenated lanolin alcohol, hexyl decanol, octyl decanol, etc. Not intended to be. Among these, straight chain higher alcohols such as lauryl alcohol, cetearyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol are particularly preferable from the viewpoint of stability. (A) A component can use 1 type (s) or 2 or more types.

(A) The amount of component is 0.5 to 5.0 wt% with respect to the total amount of the cosmetic, good Mashiku is 1.0 to 3.0 mass%. If it is less than 0.5% by mass, it is difficult to give a sufficient emollient feeling to the skin. On the other hand, if it exceeds 5.0% by mass, the effect corresponding to the compounding amount is not enhanced, The stability, such as precipitation, tends to deteriorate.

  The component (b) is a branched monoester represented by the following general formula (I), which is a liquid oil at room temperature (25 ° C.).

In the general formula (I), R ₁ represents an alkyl group having 7 to 8 carbon atoms. R ₂ represents a branched alkyl group having 3 to 13 carbon atoms, preferably 8 to 13 carbon atoms.

  Examples of the component (b) include 2-ethylhexyl 2-ethylhexanoate, isononyl 2-ethylhexanoate, isotridecyl 2-ethylhexanoate, 2-ethylhexyl isononanoate, isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate. Etc. are mentioned as suitable examples. (B) A component can use 1 type (s) or 2 or more types.

(B) The amount of component is 1.0 to 20.0 wt% relative to total amount of the cosmetic, good Mashiku is 3.0 to 15.0 wt%. If the amount is less than 1.0% by mass, the effect on skin familiarity is hardly exhibited. On the other hand, if the amount exceeds 20.0% by mass, the stability of the system may be deteriorated.

  The component (c) is an emulsifier and comprises (c-1) glycerin fatty acid ester and (c-2) hydrophilic polyethylene glycol fatty acid esters.

  Examples of the component (c-1) include glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl monostearate (self-emulsifying type), glyceryl isostearate, glyceryl monooleate, monoglyceryl fatty acid glyceryl, diolein Examples thereof include glyceryl acid and glyceryl distearate, but are not limited to these examples. Of these, glyceryl monostearate, glyceryl monostearate (self-emulsifying type) and the like are preferably used from the viewpoint of moisture retention due to liquid crystal formation (described later) and usability. (C-1) A component can use 1 type (s) or 2 or more types.

  Examples of the component (c-2) include polyethylene glycol laurate (10 polyethylene glycol adduct (= 10 EO)), polyethylene glycol monostearate (10 EO), polyethylene glycol monostearate (20 EO), polyethylene glycol monostearate ( 25 EO), polyethylene glycol monostearate (30 EO), polyethylene glycol monostearate (40 EO), polyethylene glycol monostearate (45 EO), polyethylene glycol monostearate (55 EO), polyethylene glycol monostearate (100 EO) and the like. However, it is not limited to these examples. Of these, polyethylene glycol monostearate (40EO), polyethylene glycol monostearate (45EO), polyethylene glycol monostearate (55EO), and the like are preferably used from the viewpoints of usability due to liquid crystal formation, moisture retention, and the like. (C-2) A component can use 1 type (s) or 2 or more types.

  In the present invention, by using the component (c-1) and the component (c-2) together as an emulsifier, a lamellar liquid crystal is formed together with the amphiphilic component (a), water, and excellent stability. Although it has an emollient feeling, it is non-sticky, and a feeling of use such as excellent skin familiarity can be obtained. The presence or absence of lamellar liquid crystal formation can be easily confirmed by crossed Nicols observation with an optical microscope.

The component (c-1), (c-2) component mixing ratio of, component (c-1): (c-2) component = 1: 1 to 6: 1 (mass ratio), good Mashiku Is preferably 1: 1 to 3: 1 (mass ratio), more preferably 1: 1 to 1: 2 (mass ratio) from the viewpoint of usability and stability.

The amount of component (c) [= (c-1) component and (c-2) the total amount of component] is 1.0 to 8.0 wt% with respect to the total amount of the cosmetic, good Mashiku is 1.5 to 6.0% by mass. If the amount is less than 1.0% by mass, the stability of the system tends to be poor. On the other hand, if the amount exceeds 8.0% by mass, an increase in the effect on stability is observed, but in terms of feeling in use. In some cases, the entire system becomes hard, causing problems as cosmetics.

  The oil-in-water emulsified cosmetic composition of the present invention containing the above components (a) to (c) is extremely excellent in stability over time without separation such as oil floatation even when stored over time at 50 ° C. or by centrifugation. In terms of usability, it is particularly non-sticky, lightly stretched and refreshing, but the applied skin has a very excellent characteristic that it has a feeling of use (emollient feeling) that it feels soft.

  In the present invention, triglycerides may be further blended in addition to the components (a) to (c). The emollient feeling can be further improved by blending triglycerides. Examples of triglycerides include meadow foam oil, jojoba oil, avocado oil, almond oil, olive oil, cacao oil, sesame oil, safflower oil, soybean oil, camellia oil, persic oil, castor oil, mink oil, cottonseed oil, molasses, palm oil. Although egg yolk oil etc. are mentioned, it is not limited to these illustrations. Among these, meadow foam oil and jojoba oil are preferable from the viewpoint of balance between non-stickiness and emollient feeling.

  The preferable compounding quantity of a triglyceride is 1.0-10.0 mass% with respect to cosmetics whole quantity. When the amount is less than 1.0% by mass, it is difficult to sufficiently exert the effect of the blending. On the other hand, when the amount exceeds 10.0% by mass, the sticky feeling is caused in terms of the feeling of use.

  The above components (a) to (c) and triglyceride further blended as required are all blended in the oil phase of the oil-in-water emulsified skin cosmetic of the present invention.

  The oil-in-water emulsified skin cosmetic of the present invention is produced by mixing an oil phase component with an aqueous phase component and stirring and mixing with a homogenizer or the like by a conventional method. The water phase component includes water or various water-soluble components in the water phase mainly composed of water. In the present invention, the mixing ratio is such that the water phase component is 50.0 to 90.0% by mass, more preferably 60.0 to 80.0% by mass, based on the total amount of the oil-in-water emulsion composition. It is particularly preferable to be prepared in order to sufficiently obtain the effects of the present invention. If the aqueous phase component is less than 50.0% by mass, the weight may be felt and stickiness may occur. On the other hand, if it exceeds 90.0% by mass, it is refreshing, but it is not moist and has an emollient effect that is the effect of the present invention, but is well-familiar with the skin and it is difficult to obtain a refreshing feeling of use.

  In the oil-in-water emulsified skin cosmetic of the present invention, components that can be usually blended in the emulsified cosmetic can be appropriately blended as long as the effects of the present invention are not impaired.

  Examples of such components include water-soluble polymers, UV absorbers, UV scattering agents, waxes, hydrocarbon oils, fatty acid esters, silicone oils, polyhydric alcohols, lower alcohols, drugs, and the like. It is not limited.

  The water-soluble polymer is a homopolymer of 2-acrylamido-2-methylpropanesulfonic acid (hereinafter sometimes abbreviated as AMPS), or a copolymer, such as vinylpyrrolidone, acrylic acid amide, sodium acrylate, A copolymer comprising a comonomer selected from the group consisting of hydroxyethyl acrylate. That is, an AMPS homopolymer, a vinylpyrrolidone / AMPS copolymer, a dimethylacrylamide / AMPS copolymer, an acrylic amide / AMPS copolymer, a sodium acrylate / AMPS copolymer, and the like can be given.

  Furthermore, carboxyvinyl polymer, ammonium polyacrylate, sodium polyacrylate, sodium acrylate / alkyl acrylate / sodium methacrylate / alkyl methacrylate copolymer, carrageenan, pectin, mannan, curdlan, chondroitin sulfate, starch, Glycogen, gum arabic, sodium hyaluronate, tragacanth gum, xanthan gum, mucoitin sulfate, hydroxyethyl guar gum, carboxymethyl guar gum, guar gum, dextran, kerato sulfate, locust bean gum, succinoglucan, chitin, chitosan, carboxymethyl chitin, agar etc. Can be mentioned.

  Examples of ultraviolet absorbers include paraaminobenzoic acid, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate, trimethoxycinnamate Cinnamic acid UV absorbers such as methylbis (trimethylsiloxane) silylisopentyl acid, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2- (2'-hydroxy-5'-t-octylphenyl) benzo Triazole, 2- (2′-hydroxy-5′-methylphenylbenzotriazole, 4-methoxy-4′-tert-butyldibenzoylmethane, 5- (3,3-dimethyl-2-norbornylidene) -3-pentane- 2-one, bis-ethylhexyloxyphenol-methoxy Eniru - triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] 1,3,5-triazine, dimorpholino pyridazinone like.

  Examples of the ultraviolet scattering agent include powders such as fine particle titanium oxide, fine particle zinc oxide, fine particle iron oxide, and fine particle cerium oxide having an average particle diameter of 10 to 100 nm.

  In addition, silicone treatment with methyl hydrogen polysiloxane or silane coupling agent; metal soap treatment; fluorine treatment with perfluoroalkyl phosphate diethanolamine salt or perfluoroalkyl silane; UV treated with hydrophobization by dextrin fatty acid ester treatment, etc. A scattering agent can also be mix | blended suitably according to a dosage form.

  Examples of the waxes include beeswax, candelilla wax, carnauba wax, lanolin, liquid lanolin, jojoballow and the like.

  Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, polyethylene wax, and Fischer-Tropsch wax.

  Examples of the fatty acid ester include myristyl myristate, cetyl palmitate, cholesteryl stearate, beeswax fatty acid 2-octyldodecyl and the like.

  Examples of the silicone oil include linear polysiloxanes (for example, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (for example, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.), 3 Silicone resin forming a three-dimensional network structure, silicone rubber having an average molecular weight of 200,000 or more, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.) It is done.

  Examples of the polyhydric alcohol include polyethylene glycol, glycerin, diglycerin, 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, 1,2-pentanediol, hexylene glycol and the like.

  Examples of the lower alcohol include ethanol.

  Examples of the drug include salts of L-ascorbic acid and its derivatives, salts of tranexamic acid and its derivatives, salts of alkoxysalicylic acid and its derivatives, salts of glutathione and its derivatives, and the like.

  The L-ascorbic acid is generally referred to as vitamin C, and has a cell respiration effect, an enzyme activation effect, a collagen formation action by a strong reduction action, and a melanin reduction action. L-ascorbic acid derivatives include L-ascorbic acid monostearate, L-ascorbic acid monopalmitate, L-ascorbic acid monoalkyl esters such as L-ascorbic acid monooleate; L-ascorbic acid monophosphate, L- L-ascorbic acid monoesters such as ascorbic acid-2-sulfate; L-ascorbic acid dialkyl esters such as L-ascorbic acid distearate, L-ascorbic acid dipalmitate, L-ascorbic acid dioleate; L-ascorbic acid tristearate L-ascorbic acid trialkyl esters such as Late, L-ascorbic acid tripalmitate, L-ascorbic acid trioleate; L-ascorbic acid triesters such as L-ascorbic acid triphosphate; - such as L- ascorbic acid glucosides such as ascorbic acid 2-glucoside and the like. In this invention, it uses suitably in the form of each salt of L-ascorbic acid, L-ascorbic acid phosphate ester, L-ascorbic acid-2-sulfate ester, and L-ascorbic acid 2-glucoside.

  Examples of the tranexamic acid derivatives include dimers of tranexamic acid (for example, trans-4- (trans-aminomethylcyclohexanecarbonyl) aminomethylcyclohexanecarboxylic acid, etc.), and esters of tranexamic acid and hydroquinone (for example, 4 -(Trans-aminomethylcyclohexanecarboxylic acid 4'-hydroxyphenyl ester, etc.), ester form of tranexamic acid and gentisic acid (for example, 2- (trans-4-aminomethylcyclohexylcarbonyloxy) -5-hydroxybenzoic acid, ), Amides of tranexamic acid (for example, trans-4-aminomethylcyclohexanecarboxylic acid methylamide, trans-4- (p-methoxybenzoyl) aminomethylcyclohexanecarboxylic acid, trans-4-guani Roh methylcyclohexane carboxylic acid, etc.) and the like.

  The alkoxysalicylic acid is one in which the hydrogen atom at the 3-position, 4-position or 5-position of salicylic acid is substituted with an alkoxy group, and the alkoxy group as the substituent is preferably a methoxy group, an ethoxy group, or a propoxy group. Group, an isopropoxy group, a butoxy group, and an isobutoxy group, and more preferably a methoxy group or an ethoxy group. Specific examples of compound names include 3-methoxysalicylic acid, 3-ethoxysalicylic acid, 4-methoxysalicylic acid, 4-ethoxysalicylic acid, 4-propoxysalicylic acid, 4-isopropoxysalicylic acid, 4-butoxysalicylic acid, 5-methoxysalicylic acid. , 5-ethoxysalicylic acid, 5-propoxysalicylic acid and the like.

  Although it does not specifically limit as a salt of the said chemical | medical agent, For example, salts, such as ammonium salt and an amino acid salt other than alkali metal salt or alkaline-earth metal salt like sodium salt, potassium salt, calcium salt, are mentioned.

Other antioxidants such as butylhydroxytoluene, δ-tocopherol and phytin; preservatives such as benzoic acid, salicylic acid, sorbic acid, paraoxybenzoic acid alkyl ester, phenoxyethanol, hexachlorophene, and ε-polylysine; citric acid, lactic acid, hexametalin Organic or inorganic acids such as acids and their salts; vitamin A, vitamin A palmitate, vitamin A derivatives such as vitamin A acetate, vitamin B ₆ hydrochloride, vitamin B ₆ tripalmitate, vitamin B ₆ dioctanoate, vitamin B ₂ and its derivatives, vitamin B _12, vitamin B such as vitamin B ₁₅ and its derivatives, alpha-tocopherol, beta-tocopherol, vitamin E such as vitamin E acetate, vitamin D, vitamin H, pantothenic acid, vitamins such as pantethine γ-oryzanol, allantoin, glycyrrhizic acid (salt), glycyrrhetinic acid, stearyl glycyrrhetinic acid, hinokitiol, bisabolol, eucalptone, thymol, inositol, saikosaponin, carrot saponin, saponins such as hemimasaponin, muclodisaponin, pantothenylethyl Various drugs such as ether, arbutin, cephalanthin, borage, clara, corn, orange, sage, yarrow, mallow, assembly, thyme, spruce, spruce, birch, horsetail, loofah, maronier, yukinoshita, ougon, arnica, lily, mugwort, Extracts of plants such as peony, aloe, gardenia, and cherry leaf, and pigments such as β-carotene can also be blended.

  The oil-in-water emulsified skin cosmetic of the present invention is prepared by conventional methods such as preparing an oil phase and an aqueous phase in advance and emulsifying by mixing and stirring while gradually adding the oil phase to the aqueous phase thus prepared. Although it can obtain, it is not limited to these illustrated manufacturing methods.

  The oil-in-water emulsified skin cosmetics of the present invention include emulsion products such as emulsifying foundations and sunscreen emulsions, and cream-like products such as skin creams.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited thereto. All blending amounts are mass% unless otherwise specified.

(Examples 1-8, Comparative Examples 1-8)
The skin cream which is an oil-in-water emulsion composition was manufactured by the following manufacturing method by the prescription shown to the following Tables 1-2. In addition, component (1)-(2) as described in a table | surface is (a) component used for this invention, (5)-(6) is (b) component used for this invention, (8)- (9) corresponds to the component (c-1), and (10) to (11) correspond to the component (c-2).
(Manufacturing method)
(1) to (14) were uniformly mixed and dissolved at 70 ° C. (oil phase). On the other hand, (15) to (20) were uniformly mixed and dissolved at 70 ° C. (aqueous phase). Subsequently, it emulsified with the homomixer, adding 70 degreeC oil phase gradually to the water phase hold | maintained at 70 degreeC. When the emulsification was completed, it was rapidly cooled to 40 ° C. or lower to obtain the desired oil-in-water skin cream.

  The obtained cream (sample) was evaluated for stability and usability (skin extension, skin familiarity, stickiness, freshness, emollient feeling, stickiness) by the following test methods. The results are shown in Tables 1-2.

[Stability test]
The appearance of the sample after standing for 1 month at 50 ° C. was observed visually and under a microscope, and judged according to the following evaluation criteria.
(Evaluation criteria)
○: no separation / crystal precipitation was observed Δ: little separation / crystal precipitation was observed ×: separation of liquid phase (oil phase or water phase) or crystal precipitation occurred

[Usability (spread on skin)]
An actual use test was conducted by a panel dedicated to women (10 persons), and the skin extension was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◎: All 10 people judged that the spread was light and smooth. ○: 7-9 people judged that the spread was light and smooth. △: 3-6 people were light and smooth. ×: 0 to 2 people judged that the spread was light and smooth.

[Usability (skin familiarity)]
An actual use test was conducted by a panel dedicated to women (10 persons), and skin familiarity was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◎: All 10 people judged that skin familiarity was good ○: 7-9 people judged that skin familiarity was good △: 3-6 people judged that skin familiarity was good ×: 0-2 people Determined that skin familiarity was good

[Usability (stickiness)]
An actual use test was conducted by a panel dedicated to women (10 persons), and the stickiness was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◎: All 10 people judged to be moist without stickiness ○: 7 to 9 people judged to be moist without stickiness △: 3 to 6 people judged to be moist without stickiness ×: 0 to 2 persons were judged to be moist without stickiness

[Usability (freshness)]
An actual use test was conducted by a panel dedicated to women (10 persons), and the freshness was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◎: All 10 people judged to be refreshing ○: 7-9 people judged to be refreshing △: 3-6 people judged to be refreshing ×: 0 to 2 people Determined that it was refreshing

[Usability (emollient feeling: feeling of softness on the skin)]
An actual use test was conducted by a panel dedicated to women (10 persons), and the emollient feeling was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◎: All 10 people judged that there was emollient ○: 7-9 people judged that there was emollient △: 3-6 people judged that there was emollient ×: 0-2 people Determined that there was a feeling of emollient

[Usability (feeling of sticking: feeling of sticking to the skin)]
An actual use test was conducted by a panel dedicated to women (10 persons), and the feel of the beam was evaluated according to the following evaluation criteria.
(Evaluation criteria)
◎: All 10 persons determined that there was a feeling of stickiness ○: 7-9 persons determined that there was a feeling of stickiness △: 3-6 persons determined that there was a feeling of stickiness ×: 0-2 persons Determined that there was a feeling of stickiness

  In Tables 1 and 2, the following products were used as the components shown below.

Glyceryl monostearate (self-emulsifying type) ^{(* 1)} : “NIKKOL MGS-ASEV” (manufactured by Nikko Chemicals).

Glyceryl monoisostearate ^{(* 2)} : “Sunsoft 8004” (manufactured by Taiyo Chemical Co., Ltd.).

Polyethylene glycol monostearate (40EO) ^{(* 3)} : “NIKKOL MYS-40V” (manufactured by Nikko Chemicals).

Polyethylene glycol monostearate (100EO) ^{(* 4)} : “Myrj 59P” (manufactured by Unikema Co., Ltd.).

Polyoxyethylene hydrogenated castor oil (80EO) ^{(* 5)} : “EMALEX HC-60” (manufactured by Nippon Emulsion Co., Ltd.).

Polyoxyethylene stearyl ether (20EO) ^{(* 6)} : “EMALEX 620” (manufactured by Nippon Emulsion Co., Ltd.).

AMPS homopolymer ^{(* 7)} : “Hostacerin AMPS” (manufactured by CLARIANT).

  From the results of Tables 1 and 2, the skin creams of Examples 1 to 8 according to the present invention have any of stability and usability (skin extension, familiarity with skin, stickiness, freshness, emollient feeling, elasticity). It turns out that the effect is also excellent. On the other hand, Comparative Examples 1 to 8 that do not satisfy the constituent requirements of the present invention could not have both effects of stability and usability.

  Specifically, in Comparative Examples 1, 2, and 5, which contain (a) component and (c) component but do not contain (b) component, but instead contain branched monoesters other than (b) component, emollient There is a feeling, a feeling of stickiness, and it lacks in the spread to the skin, the familiarity with the skin, the stickiness, and the refreshing. (A) component, (b) component is included, but (c) component is not included (= (c-1) component, (c-2) component is not included), but instead as emulsifier In Comparative Examples 3 and 6 containing a surfactant other than the component (c), the feeling of use is good, but the stability is poor. In Comparative Examples 4 and 7, which contain component (b) and component (c) but do not contain component (a), but instead contain solid oil other than component (a), the stability is poor and emollient Is good, but lacks skin spread, skin familiarity, stickiness, and freshness. In Comparative Example 8, which contains the component (c) but does not contain the components (a) and (b) and does not contain any solid oil other than the component (a), stability, spread on the skin, stickiness, and refreshment Although it is good, it lacks emollient and stickiness.

  Other examples of the present invention will be shown below.

(Example 9: Skin cream)
(Mixed component) (mass%)
(1) Liquid paraffin 2.0
(2) Decamethylcyclopentasiloxane 6.0
(3) Isodecyl isononanoate 6.0
(4) Glyceryl monostearate (self-emulsifying type) 5.0
("EMALEX GMS-55FD"; manufactured by Nippon Emulsion Co., Ltd.)
(5) Polyethylene glycol monostearate (30EO) 2.0
("EMALEX 830"; manufactured by Nippon Emulsion Co., Ltd.)
(6) Cetyl alcohol 2.5
(7) Batyl alcohol 2.5
(8) Jojoba oil 5.0
(9) Fragrance 0.1
(10) Ion-exchanged water remainder (11) 1,3-butylene glycol 3.0
(12) Ascorbic acid glucoside 2.0
(13) Paraben 0.15
(14) Ethanol 3.0
(15) Sodium hydroxide 0.3
(16) Vinylpyrrolidone / AMPS copolymer 0.5
("ARISTOFLEX AVC"; manufactured by CLARIANT)
(17) Citric acid 0.09
(18) Sodium citrate 0.01
(Manufacturing method)
(1) to (9) were uniformly mixed and dissolved at 70 ° C. (oil phase). On the other hand, (10) to (18) were uniformly mixed and dissolved at 70 ° C. (aqueous phase). The mixture was emulsified with a homomixer while gradually adding the oil phase to the aqueous phase maintained at 70 ° C. When the emulsification was completed, the target skin cream was obtained by rapidly cooling to 40 ° C. or lower.
(Evaluation)
When the obtained skin cream was evaluated by the test and evaluation methods described above, it was excellent in usability (usefulness evaluation: spread on skin, familiarity with skin, stickiness, refreshment, emollient feeling, stickiness ◎) Also, stability was excellent (stability evaluation: ◯).

(Example 10: oil-in-water emulsified foundation)
(Mixed component) (mass%)
(1) Liquid lanolin 2.0
(2) Hydrogenated polyisobutene 4.0
("PRISORINE 3758"; made by Unikema)
(3) 2-ethylhexyl isononanoate 10.0
(4) Stearyl alcohol 0.5
(5) Glyceryl monostearate 3.5
("NIKKOL MGS-F20V"; manufactured by Nikko Chemicals Co., Ltd.)
(6) Polyethylene glycol monostearate (40EO) 2.0
("NIKKOL MYS-40V"; manufactured by Nikko Chemicals Co., Ltd.)
(7) Fragrance 0.1
(8) Ion exchange water Residual (9) Dipropylene glycol 2.5
(10) Ethanol 1.0
(11) Paraben 0.1
(12) Talc 3.0
(13) Titanium dioxide 5.0
(14) Bengala 0.5
(15) Yellow iron oxide 1.4
(16) Black iron oxide 0.1
(17) Hydroxyethyl acrylate / AMPS copolymer (effective portion 37.5%)
("SIMULGEL NS"; manufactured by SEPIC) 0.5 (0.19)
(Manufacturing method)
(1) to (7) were uniformly mixed and dissolved at 70 ° C. (oil phase). On the other hand, (8) to (17) were uniformly mixed and dispersed at 70 ° C. (aqueous phase). The mixture was emulsified with a homomixer while gradually adding the oil phase to the aqueous phase maintained at 70 ° C. When the emulsification was completed, it was rapidly cooled to 40 ° C. or lower to obtain the desired oil-in-water emulsified foundation.
(Evaluation)
The obtained oil-in-water emulsion foundation was evaluated by the test and evaluation methods described above. As a result, it was excellent in usability (evaluation of use: skin spread, familiarity with skin, stickiness, refreshment, emollient feeling, elasticity Both the feeling and the stability were excellent (stability evaluation: ◯).

(Example 11: Oil-in-water emulsified sunscreen)
(Mixed component) (mass%)
(1) Octyl paramethoxycinnamate 6.0
(2) Diglyceryloctyl diparamethoxycinnamate 2.0
(3) 4-tert-butyl-4′-methoxydibenzoylmethane 2.0
(4) Tetra (octanoic acid / paramethoxycinnamic acid) pentaerythritol 3.0
(5) Isotridecyl isononanoate 15.0
(6) Dimethylpolysiloxane (20 mPa · s) 3.0
(7) Vaseline 0.5
(8) Glyceryl monooleate 1.2
("NIKKOL MGO"; manufactured by Nikko Chemicals Co., Ltd.)
(9) Polyethylene glycol monostearate (45EO) 1.0
("NIKKOL MYS-45MV"; manufactured by Nikko Chemicals Co., Ltd.)
(10) Ion exchange water Residual (11) Dipropylene glycol 6.0
(12) Ethanol 3.0
(13) Acrylic acid amide / AMPS copolymer (effective portion 40%) 1.0 (0.4)
("Sepigel 305"; manufactured by SEPIC)
(14) Fragrance 0.1
(Manufacturing method)
(1) to (9) were uniformly mixed and dissolved at 70 ° C. (oil phase). On the other hand, (10) to (14) were uniformly mixed and dispersed at 70 ° C. (aqueous phase). The mixture was emulsified with a homomixer while gradually adding the oil phase to the aqueous phase maintained at 70 ° C. When the emulsification was completed, it was rapidly cooled to 40 ° C. or lower to obtain the desired oil-in-water emulsified sunscreen.
(Evaluation)
When the obtained oil-in-water emulsified sunscreen was evaluated by the above-described test and evaluation methods, it was excellent in usability (evaluation of use: spread on skin, familiarity with skin, stickiness, freshness, emollient feeling, Both the feeling of elasticity was excellent and the stability was excellent (stability evaluation: ○).

(Example 12: Skin cream)
(Mixed component) (mass%)
(1) Dimethylpolysiloxane (6 mPa · s) 2.0
(2) Decamethylcyclopentasiloxane 6.0
(3) 2-ethylhexyl 2-ethylhexanoate 12.0
(4) Glyceryl monostearate 3.0
("EMALEX GMS-10SE"; manufactured by Nippon Emulsion Co., Ltd.)
(5) Polyethylene glycol stearate (10EO) 1.6
("NIKKOL MYS-10V"; manufactured by Nikko Chemicals Co., Ltd.)
(6) cetostearyl alcohol 2.5
(7) Batyl alcohol 2.5
(8) Fragrance 0.1
(9) Ion-exchanged water remainder (10) 1,3-butylene glycol 3.0
(11) Arbutin 5.0
(12) Ascorbic acid phosphate magnesium 1.0
(13) Paraben 0.15
(14) Ethanol 3.0
(15) Sodium hydroxide 0.4
(16) Dimethylacrylamide / AMPS copolymer 0.5
("SIMULGEL EPG"; manufactured by SEPIC)
(17) Citric acid 0.09
(18) Sodium citrate 0.01
(Manufacturing method)
(1) to (8) were uniformly mixed and dissolved at 70 ° C. (oil phase). On the other hand, (9) to (18) were uniformly mixed and dissolved at 70 ° C. (aqueous phase). The mixture was emulsified with a homomixer while gradually adding the oil phase to the aqueous phase maintained at 70 ° C. When the emulsification was completed, the target skin cream was obtained by rapidly cooling to 40 ° C. or lower.
(Evaluation)
When the obtained skin cream was evaluated by the test and evaluation methods described above, it was excellent in usability (usefulness evaluation: spread on skin, familiarity with skin, stickiness, refreshment, emollient feeling, stickiness ◎) Also, stability was excellent (stability evaluation: ◯).

(Example 13: Skin cream)
(Mixed component) (mass%)
(1) Liquid paraffin 1.0
(2) Decamethylcyclopentasiloxane 6.0
(3) Isononyl isononanoate 6.0
(4) Glyceryl monostearate 3.0
("NIKKOL MGS-ASEV"; manufactured by Nikko Chemicals Co., Ltd.)
(5) Polyethylene glycol stearate (40EO) 1.6
("NIKKOL MYS-40V"; manufactured by Nikko Chemicals Co., Ltd.)
(6) Cetyl alcohol 2.5
(7) Batyl alcohol 2.5
(8) Fragrance 0.1
(9) 1,3-butylene glycol 3.0
(10) Ion-exchanged water residue (11) Trimethylglycine 1.0
(12) Potassium 4-methoxysalicylate 2.0
(13) Phenoxyethanol 0.15
(14) Sodium hydroxide 0.4
(15) AMPS homopolymer 0.5
("Hostacerin AMPS"; manufactured by CLARIANT)
(16) Citric acid 0.09
(17) Sodium citrate 0.01
(Manufacturing method)
(1) to (8) were uniformly mixed and dissolved at 70 ° C. (oil phase). On the other hand, (9) to (17) were uniformly mixed and dissolved at 70 ° C. (aqueous phase). The mixture was emulsified with a homomixer while gradually adding the oil phase to the aqueous phase maintained at 70 ° C. When the emulsification was completed, the target skin cream was obtained by rapidly cooling to 40 ° C. or lower.
(Evaluation)
When the obtained skin cream was evaluated by the test and evaluation methods described above, it was excellent in usability (usefulness evaluation: spread on skin, familiarity with skin, stickiness, refreshment, emollient feeling, stickiness ◎) Also, stability was excellent (stability evaluation: ◯).

Claims (6)

(A) 0.5 to 5.0 mass% of a solid to semi-solid higher alcohol at room temperature (25 ° C.), (b) the following general formula (I):

(In the formula, R ₁ represents an alkyl group having 7 to 8 carbon atoms; R ₂ represents an alkyl group having 3 to 13 carbon atoms)
1.0 to 20.0% by mass of one or more of the branched monoesters represented by the formula: (c) (c-1) glycerin fatty acid ester and (c-2) hydrophilic polyethylene glycol fatty acid esters 1.0 to 8.0% by mass of an emulsifier comprising: (c-1) component: (c-2) component = 1: 1 to 6: 1 (mass ratio), and Trichodesmalanicum (Trichodesmalanicum) ) An oil- in- water emulsified skin cosmetic composition containing less than 0.50% by mass of a seed extract . (B) component is 2-ethylhexyl 2-ethylhexanoate, isononyl 2-ethylhexanoate, isotridecyl 2-ethylhexanoate, 2-ethylhexyl isononanoate, isononyl isononanoate, isodecyl isononanoate, and isotridecyl isononanoate one or two or more kinds, according to claim 1 Symbol placement of the oil-in-water emulsion skin cosmetic selected from among. The oil-in-water emulsified skin cosmetic according to claim 1 or 2 , wherein the component (c) is (c-1) component: (c-2) component = 1: 1 to 3 : 1 (mass ratio). The oil-in-water emulsified skin cosmetic according to any one of claims 1 to 3 , further comprising triglyceride. The oil-in-water type emulsified skin cosmetic according to claim 4 , wherein the triglyceride is meadowfoam oil and / or jojoba oil. The oil-in-water emulsified skin cosmetic according to claim 4 or 5 , wherein the amount of triglyceride is 3.0 to 10.0% by mass.