JPH07206629A - Emulsion cosmetic - Google Patents

Abstract

PURPOSE:To obtain an emulsified cosmetic having high stability and excellent inhibition of skin moisture transpiration. CONSTITUTION:3 to 20wt.% of silicone, 3 to 20wt.% of solid lipid and/or semisolid lipid and 0.1 to 1.0wt.% of a 10 to 30C alkyl acrylate cross polymer and/or an acrylic acid-a long-chain alkyl methacrylate copolymer are added to the emulsified cosmetic where the weight ratio of the silicone to the solid lipid and/or the semisolid lipid is 2/1 to 1/2 and the total amount of the solid lipid and/or the semisolid lipid and the silicone amounts for 40 to 80wt% of the total amount of the lipophilic components.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsified cosmetic composition, and more particularly to an emulsified cosmetic composition having an excellent skin moisture evaporation inhibiting effect.

[0002]

2. Description of the Related Art In cosmetics, especially basic cosmetics, the mission is to cleanly and normally prepare the skin, and one of the major functions of the cosmetics is the action of suppressing water evaporation from the skin. This is well understood from the fact that factors such as natural moisturizing factor (NMF) and natural emollient factor (NEM) play important roles as indicators of skin condition.

Therefore, conventionally, it has been an important issue in the development of cosmetics to enhance the action of suppressing the water evaporation of the skin. Research and development of substances with high water retention have been carried out. Examples of such substances include solid or semisolid hydrocarbons such as microcrystalline wax as the former, and moisturizing polymers such as acrylic resins and hyaluronic acid as the latter.

[0004] However, although each of the above substances alone suppresses excellent skin moisture transpiration, its content in cosmetics is limited in terms of safety and stability, and when they are incorporated into cosmetics, they coexist. However, there is a problem in that the effect is significantly impaired by the various other components described above, and a sufficient skin moisture transpiration suppression effect cannot be obtained.

As described above, a cosmetic having a sufficient skin moisture evaporation inhibiting effect has not yet been obtained, and its development has been desired.

[0006]

SUMMARY OF THE INVENTION In order to overcome the above problems, it is an object of the present invention to provide an emulsified cosmetic composition which is excellent in stability and in the skin water evaporation suppression effect.

[0007]

As a result of intensive studies to solve the above problems, the present inventor has found that silicone and solid fats and / or semisolid fats and C _10-30 alkyl acrylate crosspolymers and / or Further, they have found that an emulsified cosmetic containing an acrylic acid-long chain alkyl methacrylate copolymer blended in a specific ratio is excellent in the skin water evaporation suppression effect and also excellent in stability, and thus completed the present invention.

That is, the present invention relates to the total amount of cosmetics,
3 to 20% by weight of silicone, 3 to 20% by weight of solid fat and / or semi-solid fat, 0.1 to 1 of C _10-30 alkyl acrylate crosspolymer and / or acrylic acid-long chain alkyl methacrylate copolymer. 0.0% by weight, the weight ratio of silicone to the solid fat and / or semi-solid fat is 2: 1 to 1: 2, and the solid fat and / or semi-solid fat and silicone based on the total amount of lipophilic components. The emulsified cosmetic composition is characterized in that the total amount is 40 to 80% by weight.

The present invention will be described in detail below.

<1> Silicone Silicone is added to the emulsified cosmetic composition of the present invention as a component having an action of suppressing skin moisture evaporation. Here, the silicone used in the present invention refers to a polymer having a linear, cyclic or three-dimensional structure having an organopolysiloxane as a skeleton, and a viscosity of about 1 centistokes or more and 5000 or more.
Those of 0 centistokes or less are preferably used in the present invention.

As such silicone, polydimethylsiloxane, polyphenylmethylsiloxane and cyclic polydimethylsiloxane are particularly preferably used in the present invention.

<2> Solid fat and / or semi-solid fat In the emulsified cosmetic composition of the present invention, a solid fat and / or a semi-solid fat is blended with the above silicone as a component having an action of suppressing skin moisture evaporation.

The solid fat and semi-solid fat used in the present invention are solid fats and semi-solid fats and oils at normal pressure and room temperature, respectively. The solid fat and / or semi-solid fat is preferably hydrocarbons, aliphatic higher alcohols, higher fatty acids, esters of aliphatic higher alcohols and higher fatty acids,
Examples thereof include glycerin monoether of aliphatic higher alcohol and higher fatty acid ester thereof, or triglyceride of higher fatty acid, and these can be used alone or in combination of two or more kinds. Further, in the emulsified cosmetic composition of the present invention, a natural component containing the above compounds as a mixture can be used as it is.

Examples of the above hydrocarbons include microcrystalline wax, solid paraffin, vaseline, etc., aliphatic higher alcohols include stearyl alcohol, cetyl alcohol, behenyl alcohol, etc., and higher fatty acids include palmitic acid, Examples thereof include stearic acid and behenic acid.

The ester of aliphatic higher alcohol and higher fatty acid is cetyl palmitate, cetyl stearate, which is an ester of cetyl alcohol and palmitic acid or stearic acid, and ester of lauryl alcohol and myristic acid or stearic acid. Examples thereof include lauryl myristate and lauryl stearate.

Further, examples of glycerin monoethers of aliphatic higher alcohols include chimyl alcohol, batyl alcohol, etc., examples of higher fatty acid esters thereof include batyl stearate, etc., and triglycerides of higher fatty acids are exemplified. , Glyceryl tristearate, hydrogenated beef tallow, etc. can be exemplified.

As natural ingredients containing the above compounds as a mixture, various animal and vegetable oils and fats such as beef tallow, lard, coconut oil, palm oil, cocoa butter, and various waxes such as whale wax, Beeswax, carnauba wax and the like can be mentioned.

<3> C _10-30 Alkyl Acrylate _Crosspolymer and Acrylic Acid-Long Chain Alkyl Methacrylate Copolymer In the emulsified cosmetic composition of the present invention, in addition to the above silicone and solid fat and / or semisolid fat, C One or more selected from a _10-30 alkyl acrylate cross polymer and an acrylic acid-long chain alkyl methacrylate copolymer are used in combination. These compounds are polymer compounds having an emulsifying effect and are used as emulsifiers in the cosmetics of the present invention.

[0019] The C _10-30 alkyl acrylate cross polymer is a crosslinked high molecular weight polymer obtained by polymerizing higher (C _{1 0-30)} alcohol ester of acrylic acid. Examples of such compounds include Pemulen TR-1 and Pemulen T sold by BF Goodrich.
R-2 and the like can be mentioned, but in the present invention, these commercially available products can also be used.

The acrylic acid-long chain alkyl methacrylate copolymer can be obtained by copolymerizing a higher alcohol ester of acrylic acid and methacrylic acid (long chain alkyl methacrylate). Here, it is preferable that the alkyl moiety of the long-chain alkyl methacrylate that is the raw material monomer has 10 to 30 carbon atoms. Further, the monomer composition of acrylic acid and long-chain alkyl methacrylate of the copolymer is preferably 99.9: 0.1 to 4: 3 in molar ratio.

For such a compound, bee
Carbopol 1342 from F Goodrich Co. (long chain alkyl methacrylate has 10 carbon atoms in the alkyl part)
-30, the monomer composition of acrylic acid and long-chain alkyl methacrylate is 99.9: 0.1-80: 20 in molar ratio)
Since it is commercially available as such, it may be used in the present invention.

<4> Emulsified Cosmetic of the Present Invention The emulsified cosmetic of the present invention comprises the silicone and the solid fat and / or the semi-solid fat as a component having an action of suppressing skin moisture evaporation, and the emulsifier as described above. C _{10-3 0} alkyl acrylate crosspolymer and / or acrylic acid -
It is a blend of a long-chain alkyl methacrylate copolymer.

The content of silicone in the emulsion cosmetic of the present invention is 3 to 20% by weight based on the total amount of the cosmetic. If the content of silicone is less than 3% by weight, a sufficient skin moisture evaporation inhibiting effect cannot be expected, and if it exceeds 20% by weight, emulsification and stability over time may be impaired.

A suitable amount of the solid fat and / or semi-solid fat to be incorporated into the emulsified cosmetic composition of the present invention is also 3 to 20% by weight based on the total amount of the cosmetic composition, like silicone. Compounding amount is 3%
If the amount is less than the weight, sufficient skin moisture evaporation inhibiting effect cannot be obtained as in the case of silicone, and if the amount exceeds 20% by weight, stability is deteriorated such as precipitation of crystals at low temperature.
It may impair the feeling of use such as stickiness or poor elongation.

In the emulsified cosmetic composition of the present invention, the weight ratio of silicone to the solid fat and / or semi-solid fat is 2: 1 to 1: 2. The weight ratio of silicone to solid fat and / or semi-solid fat is out of the above range,
If the blending amount of either one is too large or too small, the emulsified cosmetic may fail to show a sufficient skin moisture evaporation inhibiting effect.

Further, the total amount of the solid fat and / or semi-solid fat and silicone in the total amount of the lipophilic component in the emulsified cosmetic composition of the present invention is 40 to 80% by weight. When the total amount of the solid fat and / or semi-solid fat in the lipophilic component and the silicone is out of this range, the emulsion cosmetic may not exhibit a sufficient skin moisture transpiration suppressing effect as in the above.

Here, as the lipophilic component other than the silicone, the solid fat and the semi-solid fat in the emulsified cosmetic of the present invention, liquid paraffin, squalane, cetyl 2-ethylhexanoate, isopropyl myristate, olive oil, castor oil are used. , Liquid oils such as glyceryl trioctanoate, etc., and their total amount is 2% of the total amount of lipophilic components.
It is 0 to 60% by weight.

The amount of C _10-30 alkyl acrylate crosspolymer and / or acrylic acid-long chain alkyl methacrylate copolymer to be added to the emulsified cosmetic composition of the present invention is 0.1 to 1.0 based on the total amount of the cosmetic composition. % By weight.

If the blending amount of the above-mentioned polymer is less than 0.1% by weight, the emulsifying power for forming an emulsified cosmetic will be insufficient, and a large amount of a surfactant must be blended in order to compensate for it. As described above, when a large amount of the surfactant is used, the blending amount of the silicone and the solid fat and / or the semi-solid fat, which is an essential element of the present invention, is restricted and the water transpiration suppressing action is inhibited,
Further, the unpleasant feeling such as stickiness becomes remarkable. Further, even if the above-mentioned polymer is blended in an amount of more than 1.0% by weight, the effect will reach the ceiling and it is not economical.

The emulsified cosmetic material as used in the present invention means face, hands,
It means an emulsified cosmetic used for the purpose of activation, skin conditioning, protection, etc. of the neck, scalp, and other skin of the whole body, and there is no particular limitation on the dosage form, for example, emulsion, essence, face wash, pack, massage. , Sunscreen cosmetics, nutrition cream,
In addition to hand creams, lip balms, scalp creams and the like, base make-up cosmetics such as foundations can be mentioned, and these cosmetics can be produced by the same method as for ordinary emulsified cosmetics.

Further, in the emulsified cosmetic composition of the present invention, other than the above-mentioned components, various components generally used in cosmetics, that is,
Oil, alcohol, surfactant, water, fragrance, pigment,
Preservatives, antioxidants, thickeners, UV protectors, pH adjusters, chelating agents, anti-inflammatory agents, whitening agents, and various medicinal ingredients are appropriately selected and adjusted.

The above alcohols include ethanol,
Monohydric alcohols such as propanol and benzyl alcohol; 1,3-butylene glycol, propylene glycol,
Examples thereof include polyhydric alcohols such as dipropylene glycol, glycerin, polyethylene glycol and sorbitol.

As the surfactant, sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene (hereinafter abbreviated as "POE") sorbitan fatty acid ester, POE glycerin fatty acid ester, POE alkyl ether, POE polyoxypropylene alkyl ether, POE Nonionic surfactants such as polyoxypropylene copolymer, POE alkyl phenyl ether, POE hydrogenated castor oil, polyethylene glycol fatty acid ester, decaglycerin fatty acid ester, alkyldiethanolamide; alkyl sulfate, POE alkyl ether sulfate, POE alkyl ether Acetate, alkyl phosphate, POE alkyl ether phosphate, higher fatty acid salt, higher fatty acid hydrolyzed collagen salt, amino acid anionic surfactant; sulfosuccinic acid surfactant, olefins Anionic surfactants such as phonate; amphoteric surfactants such as lecithin, betaine acetate and imidazolinium betaine; cationic such as alkyltrimethylammonium chloride, dialkyldimethylammonium chloride and alkyldimethylbenzylammonium chloride Surfactants may be mentioned.

Further, as the ultraviolet absorber, benzophenone, urocanic acid, oxybenzone, p-aminobenzoic acid ester, etc., as the antioxidant, tocopherol, dibutylhydroxytoluene, butylhydroxyanisole, etc., as the preservative, ethanol, Chlorhexidine gluconate, benzalkonium paraben chloride,
Phenoxyethanol, etc., and bactericides such as isopropylmethylphenol, trichlorocarbane, etc.
As a regulator, citric acid, sodium citrate, etc.,
Examples of the anti-inflammatory agent include plant extract, dipotassium glycyrrhizinate, and the like, and examples of the whitening agent include sulfur, magnesium ascorbate phosphate, and the like.

[0035]

EXAMPLES Examples of the present invention will be described below. In addition, all compounding amounts used below are parts by weight. Further, in the following Examples, as C _10-30 alkyl acrylate crosspolymer, Pemulen TR-1 and Pemulen TR-2 manufactured by BF Goodrich Co., Ltd. were used as acrylic acid-long chain alkyl methacrylate copolymers. Used the CARPOLE 1342 made by BF Goodrich.

[0036]

Example 1 Cream A component, B component, and C component shown in Table 1 were weighed separately and dissolved by heating at 80 ° C. While stirring the A component,
The component B was gradually added to this, and further the component C was gradually added to emulsify. This emulsion was cooled with stirring to obtain a cream.

[0037]

[Table 1]

[0038]

Example 2 Cream A component, B component, and C component shown in Table 2 were separately weighed and dissolved by heating at 80 ° C. While stirring the A component,
The component B was gradually added to this, and further the component C was gradually added to emulsify. This emulsion was cooled with stirring to obtain a cream.

[0039]

[Table 2]

[0040]

Example 3 Cream A component, B component and C component shown in Table 3 were separately weighed and heated and dissolved at 80 ° C., respectively. While stirring the A component,
The component B was gradually added to this, and further the component C was gradually added to emulsify. This emulsion was cooled with stirring to obtain a cream.

[0041]

[Table 3]

[0042]

Example 4 Cream The components A, B, and C shown in Table 4 were separately weighed and dissolved by heating at 80 ° C. While stirring the A component,
The component B was gradually added to this, and further the component C was gradually added to emulsify. This emulsion was cooled with stirring to obtain a cream.

[0043]

[Table 4]

[0044]

Example 5 Cream A component, B component, and C component shown in Table 5 were separately weighed and dissolved by heating at 80 ° C., respectively. While stirring the A component,
The component B was gradually added to this, and further the component C was gradually added to emulsify. This emulsion was cooled with stirring to obtain a cream.

[0045]

[Table 5]

[0046]

Example 6 Emulsion Each of the components A, B, C, and D shown in Table 6 was weighed, and the components A, B, and C were heated and dissolved at 80 ° C., respectively. While stirring, the B component was added to the A component, the C component was further added to coarsely emulsify, the D component was added, and the mixture was uniformly emulsified with a homogenizer and cooled to obtain an emulsion.

[0047]

[Table 6]

[0048]

Example 7 Emulsion Component A, component B, component C and component D shown in Table 7 were weighed, and component A, component B and component C were heated and dissolved at 80 ° C., respectively. While stirring, the B component was added to the A component, the C component was further added to coarsely emulsify, the D component was added, and the mixture was uniformly emulsified with a homogenizer and cooled to obtain an emulsion.

[0049]

[Table 7]

[0050]

Example 8 Emulsion Each of the components A, B, C, and D shown in Table 8 was weighed, and the components A, B, and C were heated and dissolved at 80 ° C., respectively. While stirring, the B component was added to the A component, the C component was further added to coarsely emulsify, the D component was added, and the mixture was uniformly emulsified with a homogenizer and cooled to obtain an emulsion.

[0051]

[Table 8]

[0052]

Examples 9 to 11 Creams Component A, component B, and component C shown in Table 9 were weighed separately and dissolved by heating at 80 ° C. While stirring the A component,
The component B was gradually added to this, and further the component C was gradually added to emulsify. This emulsion was cooled with stirring to obtain a cream. Similarly, Comparative Example 1 in which a surfactant was used instead of the C _10-30 alkyl acrylate cross polymer and / or the acrylic acid-long chain alkyl methacrylate copolymer.
3 to 3 and the creams of Comparative Examples 4 to 6 in which the blending amount of each component is outside the range of the present invention.

[0053]

[Table 9]

<Evaluation of Emulsified Cosmetics of the Present Invention> Regarding the emulsified cosmetics of the present invention, the above Examples 9 to 11 and Comparative Examples 1 to 1 were used.
Using the cream obtained in No. 6, a water evaporation suppression test and a low temperature stability test were performed and evaluated.

(1) Moisture Evaporation Inhibition Test A cylindrical cup having a diameter of 30 mm and a height of 60 mm was charged with 30 g of water, and the sample was covered with a filter paper sufficiently impregnated and placed in a silica gel desiccator and allowed to stand. 72 hours later,
The cup was taken out from the desiccator, and the weight of water in the cup was measured to determine the water evaporation amount. As a control, the same test was conducted using a filter paper that was not impregnated with anything.

A value obtained by dividing the water transpiration amount of the control by the water transpiration amount at the time of impregnation of the sample was used as the water transpiration suppression value for evaluation.

(2) Low-temperature stability The creams of the above-mentioned Examples and Comparative Examples were bottled into 5
The sample was placed in a constant temperature bath at 0 ° C., left standing, and after 3 months, the state was visually observed to evaluate the low temperature stability.

The results of each of the above tests are shown in the bottom column of Table 9. Accordingly, the cream of the example of the present invention is a surfactant instead of the C _10-30 alkyl acrylate crosspolymer and / or the acrylic acid-long chain alkyl methacrylate copolymer, which are essential components of the emulsion cosmetic of the present invention. The cream of the comparative example in which the blending amount of each of the components and the cream of the comparative example using is not sufficient moisture evaporation suppression effect even if the low temperature stability is good, or the water content. Although it has a problem in low-temperature stability even if it has sufficient transpiration suppression effect, it is clear that it is excellent in both water transpiration suppression effect and low-temperature stability.

Further, regarding the creams of the examples of the present invention, it can be seen that especially, the larger the blending amount of the solid fat and / or the semi-solid fat, the higher the water evaporation suppression value tends to be.

[0060]

The emulsion cosmetic of the present invention has excellent stability,
In addition, it has an excellent water evaporation suppression effect.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Kitajima 560 Kashio-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Pola Chemical Industry Co., Ltd. Totsuka Laboratory

Claims (3)

[Claims] 1. A silicone is used in an amount of 3 to 3 with respect to the total amount of cosmetics.
20% by weight, 3 to 20% by weight of solid fat and / or semi-solid fat, 0.1 to 1.0% by weight of C _10-30 alkyl acrylate crosspolymer and / or acrylic acid-long chain alkyl methacrylate copolymer. And the weight ratio of silicone to the solid fat and / or semi-solid fat is 2: 1 to 1:
2 and the solid fat and / or the total amount of lipophilic components
Or the total amount of semi-solid fat and silicone is 40-80% by weight
An emulsified cosmetic characterized in that 2. The solid fat and / or semi-solid fat is a hydrocarbon, an aliphatic higher alcohol, a higher fatty acid, an ester of an aliphatic higher alcohol and a higher fatty acid, a glycerin monoether of an aliphatic higher alcohol and a higher fatty acid thereof. The emulsified cosmetic composition according to claim 1, which is selected from esters and triglycerides of higher fatty acids. 3. The emulsified cosmetic material according to claim 1, wherein the silicone is selected from polydimethylsiloxane, polyphenylmethylsiloxane, and cyclic polydimethylsiloxane.