JP3088870B2 - Emulsion type skin cosmetic - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsified cosmetic, and more particularly to an emulsified cosmetic having excellent emulsion stability, skin safety and sensory characteristics.

[0002]

2. Description of the Related Art In recent years,
Much research has been done on emulsification technology, and excellent emulsifiers are used in many fields.

Most of the emulsions are composed of a nonionic surfactant having a polyoxyethylene chain, an anionic surfactant represented by a fatty acid soap, a cationic surfactant and an amphoteric surfactant. However, emulsified cosmetics using these synthetic surfactants generally have a drawback that they are easily irritating. Even nonionic surfactants, which are said to have the least irritation, have many problems, such as poor skin familiarity, because they have polyoxyethylene chains. Against this background, attention has been paid to sugar-based nonionic surfactants having no polyoxyethylene chain.

[0004] Alkyl esterified saccharides are nonionic surfactants widely used in foods and cosmetics, among others. There are many reports on sucrose alkyl esters using sucrose as a sugar skeleton, and they are widely used. However, the sensory properties and long-term storage stability are not sufficient.

On the other hand, there is a report aimed at using a trehalose derivative as a surfactant (Japanese Patent Application Laid-Open No.
No. 258195, JP-A-62-91236), in which the emulsifying ability is limited to a two-chain trehalose dialkyl ester. Also, glucose fatty acid monoesters have been developed (Japanese Unexamined Patent Publication No.
157349), since the hydrophilic group is a monosaccharide, the hydrophilicity is weak and a stable emulsion cannot be obtained.

In view of these circumstances, the present inventors have conducted intensive studies, and as a result, the emulsified skin cosmetic composition described below has low skin irritation, good long-term storage stability, and exhibits extremely excellent sensory characteristics. And beautiful appearance characteristics with fine texture.

That is, an object of the present invention is to provide an emulsion type cosmetic which has low skin irritation, good long-term storage stability, exhibits very excellent sensory characteristics, and exhibits beautiful appearance with fine texture. To offer.

[0008]

Means for Solving the Problems The present invention to achieve the above object is to provide an emulsification type comprising one or more surfactants selected from trehalose fatty acid monoesters and a water-soluble polymer. It is a skin cosmetic.

Hereinafter, the components of the present invention will be described in detail. The trehalose fatty acid monoester used in the present invention is a monoester of trehalose and a fatty acid or a fatty acid derivative. Among them, the acyl group as the fatty acid residue has a linear or branched saturated alkyl group or alkenyl having 8 to 22 carbon atoms. Those having a group are preferred. Specific examples include trehalose monocaprylate, trehalose monononanoate, trehalose monocaprate, trehalose monoundecanoate, trehalose monolaurate, trehalose monomyristate, trehalose monopalmitate, trehalose monostearate, trehalose monoaraquinate, and monobehenine. Examples include trehalose acid, trehalose monoundecylenate, trehalose monooleate, trehalose monolinoleate, trehalose monolinolenate, trehalose monoisostearate, trehalose monohydroxystearate, trehalose monoricinoleate, and the like. One or a combination of two or more of these trehalose fatty acid monoesters can be used.

The trehalose fatty acid monoester used in the present invention contains, as a main component, trehalose in which the hydroxyl group at the 6-position is esterified.

The content of the trehalose fatty acid monoester is 0.01 to 20 based on the total amount of the cosmetic.
% By weight, more preferably 0.1 to 10% by weight
It is. When the amount is less than 0.01% by weight, the storage stability of the cosmetic tends to decrease, and when the amount is more than 20% by weight,
This is because it becomes difficult to obtain a good touch when using the cosmetic.

The water-soluble polymer used in the present invention includes, for example, guar gum, roasted bean gum, queen seed seed, carrageenan, galactan, gum arabic, tragacanth, pectin, mannan, starch, xanthan gum, dextrin, succinoglucan, Curdlan, gelatin, casein, albumin, collagen, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose,
Soluble starch, carboxymethyl starch, methyl starch, propylene glycol alginate, alginate, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methyl ether, carboxyvinyl polymer,
Sodium polyacrylate, polyethylene glycol,
Water-soluble polymers commonly used in cosmetics and pharmaceutical bases, such as ethylene oxide / propylene oxide block copolymers, cationized cellulose, sodium chondroitin sulfate, and sodium hyaluronate. More than one species can be added in combination.

The content of the water-soluble polymer is preferably from 0.001 to 40% by weight, more preferably from 0.01 to 20% by weight, based on the total amount of the cosmetic. 0.
If the amount is less than 001% by weight, the storage stability of the cosmetic tends to decrease, while if it is more than 40% by weight, it becomes difficult to obtain a good touch when using the cosmetic.

The emulsified cosmetic composition of the present invention may contain, if necessary, oily substances, for example, hydrocarbons such as liquid paraffin, squalane, petrolatum, and microcrystalline wax, isopropyl myristate, cetyl-2-ethylhexarate, and glyceryl- Tri-2-ethylhexanoate,
Ester oils such as vitamin C palmitate, vitamin C stearate, vitamin C sulfate, and vitamin E acetate, waxes such as beeswax and spermaceti, avocado oil, almond oil, rice bran oil, olive oil, castor oil, rapeseed oil,
Safflower oil, corn oil, wheat germ oil, soybean oil,
Vegetable oils such as cottonseed oil, teaseed oil, jojoba oil, etc., animal oils such as turtle oil, mink oil, egg yolk oil, higher alcohols such as cetyl alcohol, stearyl alcohol, oleyl alcohol, octyl dodecanol, behenyl alcohol, lauric acid, myristic acid , Higher fatty acids such as palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, ricinoleic acid, isostearic acid, silicone oils such as dimethyl silicone, methyl phenyl silicone, cyclic silicone, other silicone resins, and high molecular weight silicone Oily substances and the like usually used in cosmetics and pharmaceutical bases, and one or more of these can be added in combination. Polyhydric alcohols include, for example, ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, glycerin, diglycerin, triglycerin, tetraglycerin, pentaglycerin, polyglycerin such as hexaglycerin, trimethylolpropane,
1,2,6-hexatriol, glucose, maltose, maltitol, sucrose, fructose, xylitol, mannitol, sorbitol, maltotriose,
Examples include threitol, sorbitan, starch-degrading sugar, starch-degrading sugar-reducing alcohol, and the like, and these can be added alone or in combination of two or more. Or even moisturizer,
Beauty medicinal ingredients, fragrances, preservatives, coloring agents, UV absorbers, astringents, synthetic surfactants, pigments (kaolin, mica, sericite, talc, yellow iron oxide, red iron oxide, titanium oxide, etc.), water And other components commonly used in cosmetics and pharmaceutical bases.

The cosmetics of the present invention include, for example, massage creams, cleansing creams, skin creams, foundation creams, make-up bases, hair creams, massage jellies, medicated jellies, etc., but are not particularly limited thereto. You can get a fee.

[0016]

EXAMPLES The present invention will be described in more detail with reference to examples and comparative examples. Prior to the description, methods for evaluating various properties of cosmetics are shown in Table 1. The numerical values of the formulations in the examples and comparative examples mean% by weight.

[0017]

[Table 1]

Examples 1-4, Comparative Examples 1-3; (Skin milk) Skin milk was prepared according to the formulation shown in Table 2 below. Trehalose monolaurate was used as the trehalose fatty acid monoester.

[0019]

[Table 2]

Preparation Method Components 1 to 5 in Table 2 are uniformly mixed and dissolved at about 80 ° C. (solution 1). Components 6 to 10 and 12 in the table are mixed at about 80 ° C.
The solution was homogeneously dissolved at ℃ (solution 2). Next, while stirring the solution 2 with a homomixer, the solution 1 is added and emulsified,
The component 11 was added at 70 ° C. in the cooling process, and after the temperature was lowered to room temperature, the stirring was stopped.

[0021]

[Table 3]

Preparation Method Components 1 to 5 in Table 3 are uniformly mixed and dissolved at about 80 ° C. (solution 1). Components 6 to 11 and 13 in the table are mixed at about 80 ° C.
The solution was homogeneously dissolved at ℃ (solution 2). Next, while stirring the solution 2 with a homomixer, the solution 1 is added and emulsified,
The component 12 was added at 70 ° C. in the cooling process, and after the temperature was lowered to room temperature, the stirring was stopped.

Table 2 and Table 3 show the properties of the obtained skin milk.
Shown in As shown in this table, the long-term storage stability of Examples 1 to 4 was good, but the skin milk of Comparative Example 1 lacking trehalose fatty acid monoester and the skin milk of Comparative Example 2 lacking carboxyvinyl polymer Had a problem in long-term storage stability and feel during use.

Further, the skin milk of Comparative Example 3 using a sucrose fatty acid ester commonly used in cosmetics instead of the trehalose fatty acid monoester had a problem in skin irritation.

As described above, the emulsified cosmetic of the present invention is excellent in sensory characteristics, appearance characteristics and skin safety.

Examples 5 to 7, Comparative Examples 4 and 5; (Skin Cream) Skin creams were prepared according to the formulations shown in Table 4 below.
Trehalose monostearate was used as the trehalose fatty acid monoester.

[0027]

[Table 4]

Preparation method Components 1 to 6 in Table 4 are uniformly mixed and dissolved at about 80 ° C (solution 1), and components 7 to 9 and 11 in the table are mixed at about 80 ° C.
Was dissolved uniformly in (solution 2). Next, while stirring the solution 2 with a homomixer, the solution 1 was added and emulsified, the component 10 was added at 70 ° C. in the cooling process, and the temperature was lowered to room temperature, and then stirring was stopped.

Table 4 shows the properties of the obtained skin cream. As shown in this table, the storage stability of the skin creams of Examples 5 to 7 was good, but the skin cream of Comparative Example 4 lacking xanthan gum and the skin cream of Comparative Example 5 lacking trehalose fatty acid monoester Had a problem with storage stability.

It is also understood that the emulsified cosmetic of the present invention is excellent in organoleptic properties such as skin familiarity and moist feeling and appearance properties such as fineness of skin.

Example 8 (Make-up base) A make-up base was prepared according to the following formulation. Prescription; Liquid paraffin 12.0 2. Squalane 3.0 3. Glycerin monostearate 1.5 4. Cholesterol 0.25. Cetyl alcohol 0.5 6. Trehalose monoisostearate 1.5 7. Glycerin 5.0 8. Carrageenan 0.5 9. Methyl p-hydroxybenzoate 0.310. Xanthan gum 1.0 11 Dipropylene glycol 0.8 12. Titanium oxide 0.5 13. Fragrance 0.114. Purified water balance

Of the above components, the oily components 1 to 6 are added to about 80
C. (solution 1) and aqueous components 7 to 10 and 15 were mixed and dissolved at about 80.degree. C. (solution 2). Further, the component 13 was dispersed in the component 12 (dispersion liquid 1). Next, the solution 2 was added and emulsified while stirring the solution 2 with a homomixer, and then the dispersion 1 was added and stirred, followed by cooling. The component 14 was added at 70 ° C. in the cooling process, and after the temperature was lowered to room temperature, the stirring was stopped.

The makeup base of Example 8 thus obtained is an oil-in-water emulsion,
The stability was extremely good even after storage for 4 months in a constant temperature bath at ℃. The sensory properties (skin familiarity, moist feeling) were good, and the appearance (skin texture) was also good.

Example 9; (Hair Cream) A hair cream was prepared according to the following formulation. Prescription; Stearic acid 0.5 2. Squalane 2.0 3. Liquid paraffin 40.0 4. Glycerin monostearate 0.55. Dimethyl polysiloxane 1.0 6. 6. Butyl paraoxybenzoate 0.17. 7. Trehalose monobehenate 2.0 Propylene glycol 2.0 9. Sorbitol 3.0 10. Glycerin 3.0 11. Methylcellulose 0.3 12. Tetrasodium edetate 0.1 13. 13. Methyl paraoxybenzoate 0.2 Sodium chondroitin sulfate 0.3 15. Fragrance 0.316. Purified water balance

Of the above components, the oily components 1 to 6 are added to about 80
C. (solution 1) and aqueous components 8 to 14 and 16 were mixed and dissolved at about 80.degree. C. (solution 2). next,
The solution 2 was added to the solution 2 while stirring with a homomixer, emulsified, and cooled. In the cooling process at 70 ° C
After adding 5 and lowering the temperature to room temperature, stirring was stopped.

The hair cream of Example 9 thus obtained had extremely good stability even after being stored in a thermostat at 45 ° C. for 6 months. The sensory properties (skin familiarity, moist feeling) were good, and the appearance (skin texture) was also good.

Example 10 (Cleansing Cream) A cleansing cream was prepared according to the following formulation. Prescription; Beeswax 5.0 2. Cetanol 2.0 3. Liquid paraffin 15.0 4. Vaseline 17.05. Glycerin monostearate 3.0 6. Dimethyl polysiloxane 3.0 7. 7. Butyl paraoxybenzoate 0.18. Trehalose monolinolenate 3.09 Trehalose monocaprate 3.0 10 N-stearoyl-L-2.0 Sodium glutamate 11. Glycerin 4.0 12. 13. Methyl paraoxybenzoate 0.3 Dipropylene glycol 2.0 14. Polyvinylpyrrolidone 2.0 15. Purified water balance

Of the above components, oily components 1 to 8 are added to about 80
C. (solution 1), and aqueous components 9 to 15 were mixed and dissolved at about 80.degree. C. (solution 2). Next, after adding the solution 1 while stirring the solution 2 with a homomixer,
The temperature was lowered to room temperature, and the stirring was stopped.

The thus obtained cleansing cream of Example 10 is extremely excellent in stability even after being stored in a thermostat at 45 ° C. for 6 months, and has good organoleptic properties (skin familiarity, moist feeling) and The appearance (texture) was also good.

Example 11: (Massage jelly) Massage jelly was prepared according to the following formulation. Prescription; Squalane 10.0 2. Olive oil 4.0 3. Vitamin E acetate 0.2 4. Liquid paraffin 8.0 5. 5. Polyoxyethylene cetyl ether 2.0 (2EO) 6. Trehalose monolaurate 2.0 Glycerin 35.0 8. Dipropylene glycol 20.0 9. Polyvinyl alcohol 18.0 10. 10. Dipotassium glycyrrhizinate 0.1 Purified water balance

Of the above components, the oily components 1 to 6 are added to about 80
C. (solution 1) and aqueous components 7 to 11 were mixed and dissolved at about 80.degree. C. (solution 2). Next, after adding the solution 1 while stirring the solution 2 with a homomixer,
The temperature was lowered to room temperature, and the stirring was stopped.

The massage jelly of Example 11 thus obtained is extremely excellent in stability even after being stored in a thermostat at 45 ° C. for 6 months, and has organoleptic properties (skin familiarity,
Moist feeling) and appearance (texture) were also good.

Example 12; (Cleansing Gel) Formulation: 1.2 Triglyceride 2-ethylhexanoate 5.0 2. Olive oil 41.0 3. Liquid paraffin 15.0 4. Dimethylpolysiloxane 2.0 5. Glycerin 20.0 6. Trehalose monolaurate 7.0 7.0. 7. Trehalose monomyristate 2.0 8. Polyoxyethylene sorbitan monolaurate 2.0 (20EO) Carboxyvinyl polymer 0.710. Purified water balance

Of the above components, the oily components 1 to 4 were added to about 80
C. (solution 1) and aqueous components 5 to 10 were mixed and dissolved at about 80.degree. C. (solution 2). Next, after adding the solution 1 while stirring the solution 2 with a homomixer,
The temperature was lowered to room temperature, and the stirring was stopped.

The thus obtained cleansing gel of Example 12 is extremely excellent in stability even after being stored in a thermostat at 45 ° C. for 6 months, and has good organoleptic properties (skin familiarity, moist feeling) and The appearance (texture) was also good.

[0046]

As described above, the emulsified cosmetic of the present invention has good long-term storage stability, exhibits very excellent sensory characteristics, has low skin irritation, and has beautiful appearance with fine texture. To present.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-60-81118 (JP, A) JP-A-61-100512 (JP, A) JP-A-62-91236 (JP, A) JP-A-1- 287009 (JP, A) JP-A-5-137994 (JP, A) JP-A-5-168889 (JP, A) JP-A-5-279238 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61K 7/00 A61K 7/48

Claims (1)

(57) [Claims] 1. An emulsified skin cosmetic comprising one or more surfactants selected from trehalose fatty acid monoesters and a water-soluble polymer.