JPS6366107A - Emulsion type cosmetic - Google Patents

Abstract

PURPOSE:To obtain an emulsion type cosmetic having improved shelf stability, skin safety and utility, by blending a dextrin fatty acid with pullulan, a surface active agent, an oily substance and water. CONSTITUTION:0.2-5.0wt% dextrin fatty acid ester (DFE) is blended with 0.2-5.0wt% pullulan, 2.0-7.0wt% surface active agent, 10-70wt% oily substance (e.g. fats and oils, wax or higher fatty acid) and 20-80wt% water to give O/W type or W/O type emulsion cosmetic. The cosmetic has improved shelf stability and skin safety and improved utility such as spreading properties, viscosity, moisture retention, water resistance, etc. A combination of DFE which is an ester of higher fatty acid and DFE which is an ester of an unsaturated or side-chain higher fatty acid is preferably used as the DFE.

Description

Detailed Description of the Invention (Technical Field) The present invention provides an oil phase/aqueous phase type (hereinafter referred to as O/ The present invention relates to an emulsified cosmetic that exhibits a dispersion state of a W type (hereinafter abbreviated as W2O type) or an aqueous/oil phase type (hereinafter abbreviated as W2O type). More specifically, the present invention relates to emulsified cosmetics that are excellent in storage stability, skin safety, practical properties (spreadability, viscosity, moisturizing properties, water resistance), etc.

(Prior Art) Conventionally, various thickeners (gelling agents) have been used to improve the storage stability of O/W type or W2O type emulsion compositions.

For example, water-soluble thickeners include bentonite, vegum, xanthan gum, pectin, carrageenan, hydroxypropyl cellulose, etc., and oil-soluble thickeners include organic bentonite, sucrose fatty acid ester,
Dextrin fatty acid esters and the like are known.

However, emulsified compositions containing these thickeners alone do not have sufficient storage stability;
It was essential to use a high concentration of nonionic and cationic surfactants.

In addition, in the case of emulsified cosmetics in which an emulsified composition containing a high concentration of this surfactant is applied as a cosmetic base, (a) "elongation" (spreadability) is important in terms of practical properties. ) is bad, (b) has a sticky or slimy feel (poor viscosity), (c) has poor water resistance, and makeup tends to come off due to sweating, etc. had various problems such as poor skin safety, and were not necessarily satisfactory.

(Disclosure of the Invention) Therefore, as a result of intensive research into emulsified cosmetics containing various thickeners, the present inventors found that dextrin fatty acid ester (hereinafter abbreviated as DFE) and pullulan (P
It was discovered that the 0/W type or W10 type emulsified cosmetic composition, which is a combination of ullulan), a surfactant, an oily substance, and water, solves all of the above-mentioned problems and completed the present invention. It's arrived.

(Objective of the Invention) That is, the object of the present invention is to obtain a 0.000-glycerated resin which has excellent storage stability, skin safety, and practical properties (spreadability, viscosity, moisture retention, and water resistance).
/W type or W2O type emulsified cosmetic.

(Structure of the Invention) The present invention provides an oil phase/water phase type or water phase/oil phase type emulsified cosmetic comprising a dextrin fatty acid ester, pullulan, a surfactant, an oily substance, and water. It is a fee.

(Specific explanation of the structure) The DPE used in the present invention is a known substance, and is
Publication No. 2-25039 describes a method for producing I) F Ii and its properties.

That is, DFE is an esterified product of dextrin and higher fatty acid having an average degree of polymerization of 10 to 50 glucose units, and the degree of substitution is preferably 1.0 or more per glucose unit.

For example, products esterified with higher saturated fatty acids include dextrin palmitate, dextrin stearate, dextrin palmitate stearate, and products esterified with unsaturated or side chain higher fatty acids include dextrin oleate. Examples include ester, dextrin isopalmitate, dextrin isostearate, etc., and one or more of these may be used.

In addition, in the present invention, in particular, D I"l IE (hereinafter referred to as 5-
DFE (abbreviated as DFE) and DPE (hereinafter referred to as L-D F
In the open test described below, it was found that when compounded in combination with (abbreviated as E), excellent properties were exhibited.

The amount of DFIE blended is 0 based on the total amount of the cosmetic.
．． It is preferably 2 to 5.0% by weight (hereinafter abbreviated as wt%). If it is less than 0.2 wt%, storage stability is poor, and
If it exceeds 5.0 wt%, the appearance characteristics and practical properties such as viscosity of the dosage form will deteriorate.

Pullulan used in the present invention is a well-known substance, and industrially it is produced from Obasidium pullulans, a type of Deuteromycetes called black yeast.
Aureob'asldlum Pullulans) is a polysaccharide obtained by culturing it in a sucrose or starch medium.

Its main constituent is linear α-glucan in which maltotriose is repeatedly bonded through α-1,6 bonds, and preferably has a molecular weight of 50,000 to 500,000.

In the present invention, the blending amount of pullulan is preferably in the range of 0.2 to 5.0 wt% based on the total amount. If the blending amount is 0.2wt%, the storage stability is poor, and if the amount is 0.2wt%, the storage stability is poor.
If it exceeds wt%, the appearance characteristics and practical properties such as viscosity of the dosage form will deteriorate.

The surfactant is an emulsifier commonly used in emulsified cosmetics, and one or more of anionic, cationic, and nonionic surfactants may be used.

The blending amount is 2.0 to 7.0wt based on the total amount.
% is preferred.

The oily substance used in the present invention is a known oily raw material for cosmetics, and includes, for example, oils and fats, waxes, hydrocarbons, ester oils, higher alcohols, higher fatty acids, and the like.

One or more of these oily substances are selected and applied depending on the type of cosmetic, dosage form, purpose, etc.

Its blending amount is usually 10 to 70 wt% based on the total amount.
It is.

In addition, the water is commonly used purified water, such as Hoion purified water treated with an ion exchange resin or distilled water, and the blending amount is 20 to 80 wt% based on the total amount. It is preferable to do so.

In addition to the above, the emulsified cosmetic of the present invention may appropriately contain ordinary cosmetic raw materials such as fragrances, preservatives, humectants, pigments, pigments, etc. within the range that achieves the purpose of the present invention. can do.

The emulsified cosmetic of the present invention can be applied to many other emulsion-like or cream-like cosmetics such as skin cream, skin emulsion, pine surge cream, cleansing cream, hair cream, makeup base, hand cream, and the like.

(Example) The present invention will be explained below with reference to Examples.

The test methods for storage stability, skin safety, and practical properties described in the Examples are as follows.

(1) Storage stability test After storing the sample in a constant temperature room at 45°C for 3 months, observe the appearance and emulsification state of the sample, and if no abnormality is observed (
The emulsified state and particles were uniform) were evaluated as good, and the cases where abnormalities were observed (oil separated, particles became coarse, etc.) were evaluated as poor.

(2) Skin safety test A sample of 0.05 g was applied to the skin of the flexor side of the forearm of 25 subjects in a diameter of 1.5 g. After applying a patch test bandage with Ocm circular lint cloth for 24 hours, the condition of the skin of 25 subjects was evaluated for each sample according to the following criteria.

The evaluation results were determined based on the stronger reaction between 1 hour and 24 hours after removal of the bandage, and expressed as the number of people who rated (±) or higher.

Judgment Criteria (3) Practical Property Test (Spreadability, Viscosity, Moisture Resistance, Water Resistance) After 20 test subjects used the sample for 10 days, the properties of the sample were evaluated.

The test results for test items such as spreadability, viscosity, moisture retention, and water resistance were ``good spreadability when applied,'' ``no sticky or slimy feeling,'' and ``leaving the skin moist.'''', and the number of people who answered ``My makeup doesn't come off easily or my hair gets messy due to sweat.''

Examples 1 to 4, Comparative Examples 1 to 4 [0/W type skin cream] As shown in the composition below, various DFE and pullulan were blended as shown in Table 1 to create each O/W type (1 ) Composition In Comparative Examples 1 and 2, the component (B), P Oru sorbitan monostearate (20RO), was added to 3.0. The amount was increased to wL%, and in addition to the two ingredients, cedyl alcohol sulfate ester Na salt was added in an amount of 5wL% in component (C).

=10- (2) Preparation Method Of the components (A), DFE was mixed into the (B) component, pullulan was mixed into the (C) component, and each of the (B) and (C) components were mixed at 80% The mixture was heated and dissolved at °C. Then (B), (C)
Each skin cream was prepared by mixing the ingredients and cooling to 30°C with stirring.

(3) Characteristics As shown in the table, Comparative Examples 1 and 2, in which surfactants were blended at high concentrations, had good storage stability, but did not yield favorable results in terms of skin safety and practical properties. D
Comparative Examples 3 to 4 in which FE or pullulan was blended alone
was clearly inferior in storage stability. In addition, Examples 1 to 4, which are multi-phase emulsion type cosmetics of the present invention, exhibited excellent properties in all of the various tests, and in particular, L-DFE and 5-D
Example 4 containing FE had good storage stability over a long period of time (5 months).

Examples 5 to 8, Comparative Examples 5 to 8 [W10 type hand cream] In the same manner as in Example 1, each W10 type hand cream was prepared with the following composition and various tests were conducted.

In Comparative Examples 5 and 6, sorbitan sesquioleate as component (B) was added to 5. The amount was increased to Qwt%, and in the component (C),
In addition to the above table, 3.5wt% calcium stearate
Added.

(2) Characteristics As shown by the second person, Comparative Examples 5 and 6, in which a high concentration of surfactant was blended, had good storage stability, but did not yield favorable results in terms of skin safety and practical properties. D
Comparative Examples 7 to 8 in which FE or pullulan was blended alone
was clearly inferior in storage stability.

Examples 5 to 8, which are emulsified cosmetics of the present invention, exhibited excellent properties in all of the various tests, and in particular, L-DFE and S-D
Example 8 containing FIE had good storage stability for a long period of time (5 months).

Examples 9-10, Comparative Examples 9-10 [0/W type makeup base] Similarly to Example 1, each OZW type makeup base was cut with the following composition and various tests were conducted. .

-1Q- (1) Composition (2) Properties As shown in the third coating, DFE or pullulan was
' Comparative Examples 9 and 10, which were formulated with L Germany, were clearly inferior in storage stability.

Examples 9 to 10, which are emulsified cosmetics of the present invention, exhibited excellent properties in all of the various tests, and in particular, L-DFIL and 5-5-
Example 10 containing DFE had good storage stability over a long period of time (5 months).

Examples 11-12, Comparative Examples 11-12 [W2O type air cream] Similarly to Example 2, each WZO type air cream was prepared with the following composition, and various tests were conducted. (2) Properties As shown in Table 3, Comparative Examples 11 and 12 in which DFB or pullulan were each blended alone were clearly inferior in storage stability.

Examples 11 and 12, which are emulsified cosmetics of the present invention, exhibited excellent properties in all tests, and in particular, L-DFE and 5-
Example 12 containing DFE had good storage stability over a long period of time (5 months).

(Effect of the invention)

Claims (1)

[Claims] An emulsified cosmetic of the oil phase/water phase type or the water phase/oil phase type, which is formed by blending dextrin fatty acid ester, pullulan, a surfactant, an oily substance, and water.