JPH03200710A - Emulsion-type cosmetic - Google Patents

Abstract

PURPOSE:To obtain an emulsion-type cosmetic having excellent emulsion stability and good affinity to hair by using a fatty acid ester of glucose and/or a specific alkylglucoside, a specific oleophilic nonionic surfactant, an oily substance and water as essential components. CONSTITUTION:The objective emulsion-type cosmetic is composed of (A) 0.1-10wt.% of a fatty acid ester of glucose and/or an alkylglucoside having 1-4C alkyl group, (B) 0.05-10wt.% of an oleophilic nonionic surfactant having an HLB of <=5.0 (e.g. sorbitan sesquistearate), (C) 0.05-60wt.% of an oily substance (e.g. liquid paraffin or squalane) and (D) 20-95wt.% of water. The emulsion-type cosmetic has excellent emulsion stability to stably keep the emulsified state even after storing over a long period at a high temperature. Furthermore, it has good affinity to hair and is easily spreadable. The component A preferably contains <=95% of monoester and <=0.5wt.% of triester or higher polyesters.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an emulsified cosmetic that has excellent emulsion stability and is applicable to hair and the like.

[Prior art and problems to be solved by the invention] Conventionally, emulsified cosmetics such as hair rinses, hair lotions, and gel hair creams have been widely used. It is desirable that the emulsification is not destroyed and that a stable emulsified state is maintained even when stored for a long period of time.

Therefore, although various methods for stabilizing the emulsion of emulsified cosmetics have been proposed, there is a need for a method that more effectively stabilizes the emulsification of emulsified cosmetics. In addition, emulsified cosmetics are required to have excellent blending properties and ease of spreading on the hair due to their original purpose.

[Means and effects for solving the problem] As a result of intensive studies in order to meet the above-mentioned needs, the present inventors have discovered a fatty acid ester of furkyl glucozide having glucose and/or alkyl groups of 1 to 4 carbon atoms ( By using a combination of a lipophilic nonionic surfactant (hereinafter collectively referred to as glucose fatty acid esters) and a lipophilic nonionic surfactant with an HLB of 5.0 or less, an emulsified cosmetic obtained by emulsifying an oily substance in water. The emulsion stability has been significantly increased, and there is almost no breakage of the emulsion even when stored at high temperatures for a long period of time, and the resulting emulsion type cosmetic has excellent blending and spreading on hair. These findings led to the present invention.

Therefore, the present invention provides an emulsified cosmetic containing (A) glucose fatty acid esters, (B) a lipophilic nonionic surfactant with an HLB of 5.0 or less, (C) an oily substance, and (D) water. I will provide a.

The present invention will be explained in more detail below.

In the emulsified cosmetic of the present invention, the glucose fatty acid esters (fatty acid esters of glucose and/or alkyl glucosides whose alkyl groups have 1 to 4 carbon atoms) used as component (A) include glucose or alkyl glucosides. and carbon number 4-20, more preferably 8-1
8 fatty acids or fatty acid derivatives such as lower alkyl esters thereof are preferred.

In this case, the raw material glucose can be one obtained by hydrolyzing starch from corn, potato, etc. with acid or enzymes, decolorizing it, and purifying it. Examples of such substances include crystalline glucose, powdered glucose, and granular glucose defined by JAS.

In addition, the raw material alkyl glucosides whose alkyl groups have 1 to 4 carbon atoms include those obtained by adding fatty acid alcohols with 1 to 4 carbon atoms to the above-mentioned glucose, such as 1-methyl glucodide, 1-ethyl glucodide, 1-ethyl glucodide, Examples include -butyl glucodide, and representative examples include those commercially available from stearic acid.

On the other hand, fatty acids having 4 to 20 carbon atoms can be suitably used, regardless of whether they are natural 2-synthesized, saturated, unsaturated, linear 9-branched, single, or mixed, and natural fatty acids. Caprylic acid, decanoic acid, lauric acid, myristic acid, valmitic acid, stearic acid, linoleic acid, and oleic acid obtained by hydrolyzing vegetable oils such as coconut oil, palm oil, tallow oil, rapeseed oil, and soybean oil, and animal oils. Examples include saturated and unsaturated linear fatty acids such as , capric acid, and undecanoic acid. In addition, as synthetic fatty acids, mixtures of linear and branched fatty acids obtained by oxidizing olefin polymers can be used, and fatty acids derived from microorganisms such as γ-lylunic acid can be used. You can also do that. Furthermore, as lower esters of fatty acids, methyl, ethyl,
Alkyl esters having 1 to 8 carbon atoms such as propyl can be used, and halides of fatty acids can also be used as raw materials.

Glucose fatty acid esters can be produced by ester synthesis using lipase or the like using these raw materials, such as transesterification of raw oils and fats with glucose, transesterification of lower alcohol esters of fatty acids with glucose, and ester synthesis of fatty acids and glucose. It is preferable to synthesize it by a method such as , a synthesis method using fatty acid chloride and glucose, or various other known methods.

In this case, in the present invention, the glucose fatty acid ester has a monoester content of 90% or more, particularly 95% or more.
% or more of glucose fatty acid ester is preferable in order to achieve the above-mentioned object of the present invention, and the polyester content of triester or more is preferably 1% or less, especially 0.0% or more.
It is more preferable that the amount is 5% or less, because the above-mentioned known method produces an ester with a low monoester content and a high tri or higher polyester content.

When obtaining a monoester, it may take time and effort to perform fractionation and isolation after synthesis. Therefore, in this respect, the method using heat-stable lipase, which was previously proposed by the present applicant in Japanese Patent Application No. 1-210495, is preferably adopted for the production of monoester.

In addition, as glucose fatty acid monoesters, those of the following formula in which the OH group at the 6-position of glucose is esterified are preferable.

(However, R represents a fatty acid residue having 4 to 20 carbon atoms, and R' represents a hydrogen atom or an alcohol residue having 1 to 4 carbon atoms.) Examples of such glucose fatty acid ester include glucose-6-caprylic monoester. Ruth-6-zocan monoester, glucose-6-lauryl monoester, glucose-6-myristyl monoester, glucose-
Examples include 6-balmityl monoester, glucose-6-oleyl monoester, and glucose-6-γ-reroot monoester.

In addition, examples of alkyl glucoside fatty acid esters having 1 to 4 carbon atoms include 1-methyl-6-capryl glucose, 1-ethyl-6-capryl glucose, and 1-ethyl-6-capryl glucose.
6-laurylglucose, 1-butyl-6-caprylglucose, 1-ethyl-6-balmitylglucose, 1
-Ethyl-6-oleylglucose and the like are exemplified.

In addition, the present invention provides one of the above-mentioned glucose fatty acid esters.
A species may be used alone or two or more species may be used in combination.

The blending amount of glucose fatty acid esters can be selected in various ways, but it is usually 0.00% of the total composition. It is 1 to 10% (weight %, same hereinafter), especially 0.1 to 2%.

Next, the lipophilic nonionic surfactant of component (B) has an HLB of 5.0 or less, more preferably 2.0 to 5.0, such as sorbitan sesquistearate, sorbitan Sorbitan fatty acid esters such as tristearate, sorbitan monooleate, sorbitan sesquitol oil fatty acid ester, and sorbitan triolate.

P O E (6 mol) sorbitol hexastearate.

Monoglycerides such as glycer monostearate and glyceryl monomyristate, propylene glycol fatty acid esters such as propylene glycol monostearate, P
OE (2 mol) monostearate, POE (2 mol) monooleate, ethylene glycol monostearate, diethylene glycol stearate, POE (2 mol) nonylphenyl ether, POE (3 mol) castor oil, POE nonylphenyl formaldehyde condensation These can be used alone or in combination of two or more.

The amount of the above-mentioned lipophilic nonionic surfactant can be selected in various ways, but it is usually 0.05 to 10% of the total composition, especially 0.1%.
~5%.

The oily substance of component (C) can be selected depending on the type of cosmetic, but in particular for hair cosmetics,
Examples include hydrocarbons with 8 to 60 carbon atoms, fatty acids with 14 to 22 carbon atoms, higher alcohols with 14 to 30 carbon atoms, esters with 16 to 60 carbon atoms, polysiloxanes, etc. By blending these oily ingredients, hair combability is improved. It can improve the texture and give a smooth and moist feeling.

Examples of the above-mentioned oily components are as follows.

(a) C engineering, -C6. hydrocarbon liquid paraffin (viscosity 70-350 seconds), squalane (
C. H, □), α-olefin oligomer (CG~C
2. α-olefin polymers (mainly trimers), vaseline, etc.

(mouth) C14-Csz fatty acids such as stearic acid, oleic acid, myristic acid, etc.

(c) C1. ~C6. Higher alcohols such as cetanol, stearyl alcohol, oleyl alcohol, incetanol, etc.

(2) C□. -C! ．． ester of isopropyl myristate (IPM), purecellin,
olive oil, castor oil, etc.

(e) Polysiloxane dimethylpolysiloxane (viscosity 20-3,000.00
0cs/25℃ is preferable, KF manufactured by Shin-Etsu Chemical Co., Ltd.
-96 etc.), methylphenylpolysiloxane (
Same as above, KF-56), organopolysiloxane polyoxyalkylene copolymer (same as above, KF-351, 352,
610 etc.) etc.

The blending amount of these oily components is usually 0.05 to 60
%, but the above components (a) to (ii) are 0.05 to 10
%, component (e) can be 0.05 to 20%.

Further, although the amount of water used as component CD) can be varied, it is usually 20 to 95%.

In addition to the above-mentioned essential ingredients, the emulsified cosmetic according to the present invention includes:
Commonly used ingredients can be blended depending on the type, etc., and the following can be exemplified as such ingredients.

(a) Cationic activator By incorporating a cationic activator, when applied to hair, it is possible to impart ease of combing and smoothness.

In this case, as the cationic activator, the following general cloud [wherein Rt or R1, R, is an alkyl group, alkenyl group or hydroxyalkyl group having 10 to 24 carbon atoms,
or -R(OCR,CH,)n (However, R has 1 carbon number
0 to 24 alkyl group or hydroxyalkyl group,
n is an integer of 1 to 10). Also, R,,R,,R.

or R,, R4 is an alkyl group having 1 to 3 carbon atoms, →CH
A group represented by CHeOiH (wherein R1 is a hydrogen atom or a methyl group, and m is an integer of 1 to 5), a benzyl group, or a cinnamyl group. X is a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms. ] Compounds are preferably used.

The amount of the cation activator to be added may be 0.05 to 20%, usually 0.5 to 5%.

(b) Phosphate esters (b) It is blended into a rinse etc. in combination with the cationic activator (a) or alone. The blending amount is usually about 0.1 to 5%, and can provide good moisturizing properties and shine to the hair.

Such a phosphoric acid ester is represented by the following general formula % (wherein R6 is a hydrogen atom or a monovalent hydrocarbon group having 5 to 20 carbon atoms, Y is a divalent hydrocarbon group having 2 to 3 carbon atoms, and M is a divalent hydrocarbon group having 2 to 3 carbon atoms. A hydrogen atom, an alkali metal or (hydroxy)alkyl-substituted ammonium, Z represents M or R6→0-Yi group, and n is an integer of O to 60) are preferably used.

(c) Hydrophilic alcohols Ethanol, glycerin, sorbitol, diethylene glycol, dipropylene glycol, polyethylene glycol, polypropylene polyethylene glycol, hexylene glycol, etc. can be used.

(d) pH adjuster To adjust the pH to 3 to 8, which is close to the physiological pH of the scalp, use organic acids such as citric acid, inorganic acids such as phosphoric acid, inorganic alkalis such as sodium hydroxide, organic amines such as triethanolamine, etc. can be blended.

(e) Water-soluble polymer compounds such as cationic cellulose, cationic polymers such as Marquat 550■, anionic polymers such as xanthan gum, carrageenan, sulfated cellulose, poly(meth)acrylic acid copolymers, Yukahomer■, chitin, etc. Nonionic polymers such as amphoteric polymers, hydroxyethyl cellulose, and hydroxyethylated polyacrylic esters can be blended.

(F) Surfactant (B) In addition to the lipophilic nonionic surfactant component, other active agents 1 such as polyoxyethylene sorbitan fatty acid ester, glycerin, or ethylene oxide adduct of propylene glycol fatty acid ester may be added as necessary. , polyethylene glycol fatty acids, polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene (hardened) castor oil derivatives, polyoxyalkylamines, polyoxyfatty acid amides, and other nonionic surfactants, N- Anionic surfactants such as acyl amino acid salts, alkylsulfosuccinic acids, amphoteric surfactants such as betaine lauryl dimethylaminoacetate, and the like may be blended.

Furthermore, bactericidal agents, anti-dandruff agents, anti-inflammatory agents, hair-growth ingredients, plant extracts, fragrances, pigments, and the like can be added as necessary.

〔Effect of the invention〕

The emulsified cosmetic according to the present invention has excellent emulsion stabilization, and the emulsified state remains stable even when stored at high temperatures for a long period of time.
It blends well with hair and stretches easily.

EXAMPLES Hereinafter, the present invention will be specifically illustrated by examples and comparative examples, but the present invention is not limited to the following examples.

[Example, comparative example]

O/W type skin cosmetics having the compositions shown in Table 1 were prepared, and their emulsion stability and ease of spreading onto hair were evaluated using the following methods. The results are also listed in Table 1.

[Storage stability]

Each prepared sample had an inner diameter of 3 an and a height of 20 a1.
1 glass tube (the bottom is covered with a rubber stopper) with a height of 180 mm.
The container was filled up to 50°C, stored at 50°C for one month, and the presence or absence of a transparent layer separated into the upper layer was determined.

O: Almost no separation observed.

×: A separated layer is clearly observed.

[Easy to spread on hair]

After moistening the 25aIl and Log hair strands and squeezing them lightly,
2 g of the prepared sample was placed on the roots of the hair, and the ease of spreading the hair in the direction of the tips of the hair with fingers was sensory evaluated.

0: Extremely good spreadability △: Good spreadability X: Poor spreadability

Claims (1)

[Scope of Claims] 1. (A) fatty acid ester of glucose and/or alkyl glucoside whose alkyl group has 1 to 4 carbon atoms, (B) lipophilic nonionic surfactant with HLB of 5.0 or less , (C) an oily substance, and (D) an emulsified cosmetic comprising water.