JP2879985B2 - Emulsion type 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 emulsion type cosmetic,
More specifically, the present invention relates to an emulsified cosmetic having excellent emulsion stability and sensory characteristics.

[0002]

2. Description of the Related Art In recent years,
Numerous studies have been made on emulsification techniques, and as a result, emulsifiers and emulsification techniques have greatly advanced, and emulsions having excellent stability are used in many fields.

Most of the emulsifiers are nonionic surfactants having a polyoxyethylene chain, anionic surfactants represented by fatty acid soaps, cationic surfactants, and amphoteric surfactants. However, emulsified cosmetics using these synthetic surfactants generally have a drawback that they can easily irritate the skin and hair. Even nonionic surfactants, which are said to have the least irritation, have problems such as poor skin familiarity due to having a polyoxyethylene chain.

[0004] Against this background, non-ionic alkyl glycosides having no polyoxyethylene chain have attracted attention. For example, Japanese Patent Application Laid-Open No. 1-203036
Japanese Patent Application Publication No. JP-A-2003-115139 discloses "emulsified compositions and emulsified cosmetics" comprising an alkyl glycoside and a polyhydric alcohol, having good emulsification stability and excellent usability. However, as a result of a detailed study of the "emulsified composition and emulsified cosmetic" according to the present invention, it was clarified that it had a disadvantage that the long-term storage stability was not always sufficient.

The present inventors have conducted intensive studies to solve the above-mentioned drawbacks of cosmetics using an alkyl glycoside as an emulsifier. As a result, when used in combination with a sucrose higher fatty acid ester, long-term storage stability is good. The present inventors have found that a product exhibiting extremely excellent sensory characteristics and exhibiting beautiful appearance characteristics with fine texture can be obtained.

[0006] That is, an object of the present invention is to provide an emulsified cosmetic which has excellent emulsion stability and organoleptic properties and exhibits fine and beautiful appearance.

[0007]

The above object is achieved by a cosmetic containing an oily substance and water, which is provided by an emulsion type cosmetic containing an alkyl glycoside and a higher fatty acid ester of sucrose.

[0008] The alkyl glycoside in the present invention is
An alkyl group or alkenyl group having 8 to 22 carbon atoms at the terminal and a residue G derived from 1 to 5 reducing sugars having 5 to 6 carbon atoms
It is composed of

As a raw material of the residue G, monosaccharides such as glucose, galactose, xylose, fructose,
Mannose, lyxose, apibinose and the like, and maltose, xylobiose, isomantose, lactose, sucrose, raffinose, maltotriose and the like for disaccharides or more. Particularly preferred raw materials among these are glucose, fructose, maltose and sucrose in view of availability and cost. And, in the case of an alkyl glycoside composed of two or more residues,
The sugar chain binding mode is 1-2, 1-3, 1-4, 1-6.
Bonds, furthermore α-, β-pyranoside or furanoside bonds and any mixtures thereof are possible. Accordingly, for example, decyl-β-D-glycoside, tetradecyl-α-D-fructoside, dodecyl-β-D-maltoside, octadecyl-α-D-scroside and the like can be mentioned.

The amount of the alkyl glycoside is 0.01 to 10% by weight based on the total amount of the cosmetic.
Preferably it is 0.1 to 5% by weight. That is, this is 0.
If the amount is less than 01% by weight, the storage stability of the cosmetic is inferior. If the amount is more than 10% by weight, the cosmetic itself is not completely dissolved and tends to be separated, and the feel when using the cosmetic is poor. Because it is easy to become.

The higher sucrose fatty acid ester used in the present invention is a sucrose ester with a saturated or unsaturated higher fatty acid having 8 to 22 carbon atoms. The degree of esterification is arbitrary, for example, monoester, diester, triester,
Tetraesters, pentaesters, and any mixtures thereof are possible. Thus, sucrose monostearate, sucrose monooleate, sucrose monoisostearate, sucrose monopalmitate, sucrose monolaurate, sucrose distearate, sucrose dioleate,
Sucrose diisostearate, sucrose dipalmitate, sucrose dilaurate, sucrose tristearate, sucrose trioleate, sucrose triisostearate, sucrose tripalmitate, sucrose trilaurate, sucrose tetrastearate, sucrose Tetraoleate, sucrose tetraisostearate, sucrose tetrapalmitate, sucrose tetralaurate, sucrose pentastearate, sucrose pentaoleate, sucrose pentaisostearate, sucrose pentapalmitate, sucrose Examples include simple substances such as pentalaurate and mixtures thereof, but are not limited thereto.

The amount of the higher fatty acid ester of sucrose is 0.01 to 1 based on the total amount of the cosmetic.
0% by weight, preferably 0.1 to 5% by weight. That is,
If it is less than 0.01% by weight, the storage stability of the cosmetic is inferior. If it is more than 10% by weight, the cosmetic itself tends to be completely dissolved and separated, and the feel when using the cosmetic is used. Is likely to be worse.

The oily substance used in the present invention means an oily substance in a broad sense, for example, liquid paraffin, squalane,
Hydrocarbons such as petrolatum and microcrystalline wax, isopropyl myristate, cetyl-2-ethylhexanoate, glyceryl-tri-2-ethylhexanoate, vitamin E acetate, vitamin A palmitate, vitamin C stearate, vitamin C Ester oils such as sulfate, waxes such as beeswax and spermaceti, avocado oil, camellia oil, macadamian nut oil, almond oil,
Rice bran oil, olive oil, castor oil, rapeseed oil, safflower oil, corn oil, wheat germ oil, soybean oil, cottonseed oil,
Vegetable oils such as teaseed oil and jojoba oil, animal oils such as turtle oil, mink oil, egg yolk oil, cetanol, stearyl alcohol, oleyl alcohol, octyldodecanol,
Higher alcohols such as behenyl alcohol, higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, ricinoleic acid, isostearic acid, dimethyl silicone,
Silicone oils such as methylphenylsilicone and cyclic silicone, other silicone resins, high molecular weight silicones, and other oils commonly used in cosmetics and pharmaceutical bases. These oils are used alone or in combination of two or more. It is used.

The content of these oily substances is 5 to 80% by weight, preferably 1 to 80% by weight based on the total amount of the cosmetic.
0 to 60% by weight. That is, if the content is less than 5% by weight, the storage stability of the cosmetic is slightly deteriorated, and the finish is too light as an emulsified type cosmetic. On the other hand, if the content is more than 80% by weight, the stickiness of the oil becomes remarkable and the oil floats. It is because it becomes easy to do.

The emulsified cosmetic of the present invention may contain, if necessary, a humectant, a cosmetic active ingredient, a fragrance, a preservative, a coloring agent, an ultraviolet absorber, an astringent, a synthetic surfactant, a pigment (caone). , Mica, sericite, talc, iron oxide yellow, iron oxide red, titanium oxide, etc.) and water-soluble natural polymers (casein soda, pectin, xanthan gum, karaya gum, locust bean gum, carrageenan, etc.) can be added.

The cosmetics of the present invention include, for example, massage creams, cleansing creams, skin creams, skin milks, foundation creams, make-up bases, hair creams, etc. Can be obtained.

[0017]

The present invention will be described below in detail with reference to examples and comparative examples.

The characteristics of the cosmetics examined in this example are long-term storage stability, sensory characteristics, and appearance characteristics according to the following methods. (1) Long-term storage stability: The sample composition was left in a thermostat at 45 ° C. for 1 to 6 months, and its appearance was visually evaluated. (2) Sensory characteristics: The feel (skin familiarity) at the time of application and the finish (moistness) after application were examined by three specialized inspectors and comprehensively evaluated. (3) Appearance characteristics: Fineness and beauty of the skin were judged with the naked eye. In addition, the numerical value of the prescription in an Example means weight%.

Examples 1-4, Comparative Examples 1-2: (Skin milk) A straight-chain alkyl group having 10 carbon atoms as an alkyl glycoside, and decyl α-D-glycoside which is glucose as a residue derived from a reducing sugar. And oleic acid triester as sucrose higher fatty acid ester.

Then, components 1 to 6 in Tables 1 to 4 are uniformly mixed and dissolved at about 80 ° C. (solution 1), and water-soluble components 7 to 10 and 12 in the table are brought to about 80 ° C. And dissolved uniformly (solution 2). Next, the solution 1 was added and emulsified while stirring the solution 2 with a homomixer.
After adding Component 11 at 0 ° C. and lowering the temperature to 30 ° C., stirring was stopped.

[0021]

[Table 1]

[0022]

[Table 2]

[0023]

[Table 3]

[0024]

[Table 4]

The properties of the obtained skin milk are shown in Tables 1 to 4.
Shown in As shown in this table, the long-term storage stability of the skin milks of Examples 1 to 4 was good, but the skin milks of Comparative Examples 1 and 2 lacking either the alkyl glycoside or the higher fatty acid ester of sucrose. Both had problems with long-term storage stability.

Further, by comparing each example with a comparative example, it can be understood that the emulsified cosmetic of the present invention is excellent in sensory characteristics and appearance characteristics.

Examples 5-8, Comparative Examples 3-4: (Skin cream) A straight-chain alkyl group having 14 carbon atoms as an alkyl glycoside, and tetradecyl β-D which is maltotriose as a residue derived from a reducing sugar. -Maltotrioside was used, and diester of oleic acid was used as higher sucrose fatty acid ester.

Then, components 1 to 6 in Tables 5 to 8 are uniformly mixed and dissolved at about 80 ° C. (solution 1), and water-soluble components 7 to 10 and 12 in the table are brought to about 80 ° C. And dissolved uniformly (solution 2). Next, the solution 1 was added and emulsified while stirring the solution 2 with a homomixer.
After adding Component 11 at 0 ° C. and lowering the temperature to 30 ° C., stirring was stopped.

[0029]

[Table 5]

[0030]

[Table 6]

[0031]

[Table 7]

[0032]

[Table 8]

Tables 5 to 8 show the properties of the obtained skin cream. As shown in this table, the storage stability of the skin creams of Examples 5 to 8 was good, but the skin creams of Comparative Examples 3 and 4 lacking either the alkyl glycoside or the higher fatty acid ester of sucrose were Both had a problem with storage stability.

Further, by comparing each example with the comparative example, it is understood that the emulsified cosmetic of the present invention has excellent sensory characteristics and appearance characteristics.

Example 9 (Make-up base) A make-up base was prepared according to the following formulation. A linear alkyl group having 12 carbon atoms is used as the alkyl glycoside, and dodecyl α-D- which is maltose is used as the residue derived from the reducing sugar.
Maltoside was used, and a di-triester mixture of stearic acid was used as the higher sucrose fatty acid ester. Prescription; Liquid paraffin 12.0 2. Squalane 3.0 3. Glycerin monostearate 1.5 4. Cholesterol 0.25. Cetyl alcohol 0.5 6. 6. sucrose stearic acid di-triester 1.5 7. Dodecyl-α-D-maltoside 0.5 Glycerin 5.0 9. Carrageenan 0.5 10. Methyl parahydroxybenzoate 0.1 11. Dipropylene glycol 3.0 12. Titanium oxide 0.5 13. Fragrance 0.114. Purified water 71.6

Of the above components, the oily components 1 to 6 are added to about 80
Homogeneously mixed and dissolved at 1 ° C. (solution 1).
10 and 14 were uniformly mixed and dissolved at about 80 ° C. (solution 2). Further, the component 12 was uniformly dispersed in the component 11 (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. After stirring, the solution 2 was cooled. In addition, component 13 was added at 70 ° C. in the cooling process, and after the temperature was lowered to 30 ° C., stirring was stopped.

The makeup base of Example 9 thus obtained was an O / W 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 10 (Hair Cream) A hair cream was prepared according to the following formulation. A straight-chain alkyl group having 12 carbon atoms is used as the alkyl glycoside, dodecyl β-D-maltoside which is maltose is used as the residue derived from the reducing sugar, and a di-triester mixture of stearic acid is used as the sucrose higher fatty acid ester. Using. Prescription; Stearic acid 0.5 2. Squalane 2.0 3. Liquid paraffin 40.0 4. Glycerin monostearate 0.55. Butyl paraben 0.16. Sucrose stearic acid di-triester 1.8 7. 7. Pyrropylene glycol 2.0 Sorbitol 3.0 9. Glycerin 4.0 10. Tetrasodium edetate 0.1 11. Methyl paraben 0.1 12. Dodecyl-β-D-maltoside 0.8 13. Fragrance 0.3 14. Purified water 44.8

Of the above components, the oily components 1 to 6 are added to about 80
Homogeneously mixed and dissolved at 1 ° C. (solution 1).
12 and 14 were uniformly mixed and dissolved at about 80 ° C. (solution 2). Next, the solution 2 was added and emulsified while stirring the solution 2 with a homomixer, and the component 13 was added at 70 ° C. in the cooling process, and after the temperature was lowered to 30 ° C., the stirring was stopped.

The thus obtained hair cream of Example 10 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 11 (Cleansing Cream) A cleansing cream was prepared according to the following formulation. A linear alkyl group having 12 carbon atoms is used as the alkyl glycoside, and dodecyl β which is maltose is used as the residue derived from the reducing sugar.
-D-maltoside was used, and a di-triester mixture of stearic acid was used as the sucrose higher fatty acid ester. Prescription; Beeswax 5.0 2. Cetanol 2.0 3. Liquid paraffin 20.0 4. Vaseline 20.0 5. Glycerin monostearate 3.0 6. Butylparaben 0.17. 7. Sucrose stearic acid di-triester 2.0 Glycerin 4.0 9. Dodecyl-β-D-maltoside 0.9 10. Methyl paraben 0.1 11. Dipropylene glycol 2.0 12. Purified water 40.9

Of the above components, the oily components 1 to 7 are heated to about 80 ° C.
And dissolve uniformly (solution 1), and aqueous components 7-1
2 was uniformly mixed and dissolved at about 80 ° C. (solution 2). Next, the solution 1 was added and emulsified while stirring the solution 2 with a homomixer, and then the temperature was lowered to 30 ° C. to stop stirring.

The cleansing cream of Example 10 thus obtained has extremely excellent 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.

[0044]

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

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

[0039]

[Table 4]

[0040]

[Table 5]

[0041]

[Table 6]

[0042]

[Table 7]

[0043]

[Table 8]

Claims (1)

(57) [Claims] 1. An emulsified cosmetic comprising an oily substance and water, comprising an alkyl glycoside and a sucrose higher fatty acid ester.