JPS6344509A - Emulsion type cosmetic - Google Patents

Abstract

PURPOSE:To obtain an emulsion cosmetic of oil phase/water phase or water phase/oil phase type having improved storage stability, skin safety, utility characteristics, etc., by blending a dextrin fatty acid ester with mucin, an oily substance and water. CONSTITUTION:(A) dextrin fatty acid ester which is preferably an esterified substance of a dextrin having an average polymerization degree of 10-50 glucose units and a higher fatty acid ester and has >=1.0 substitution degree based on 1 glucose unit is blended with (B) mucin, (C) an oily substance and (D) water (purified water) to give an emulsion cosmetic of oil phase/water phase type or water phase/oil phase type having improved storage stability, skin safety and utility characteristics (spread, viscosity, moisture retention and water resistance), etc. The ratio of the components is 0.2-5wt% component A, 0.2-2.0wt% component B, 10-70wt% component C and 20-80wt% component D based on total amounts of the cosmetic.

Description

Detailed Description of the Invention (Technical Field) The present invention provides dextrin fatty acid ester, mucin,
Oil phase/aqueous phase type (hereinafter referred to as
(abbreviated as O/W type) or aqueous/oil phase type (hereinafter referred to as W2)
It is an emulsified cosmetic that exhibits a dispersion state of O type (abbreviated as O type).

More specifically, storage stability, skin safety and practical properties (
The present invention relates to emulsified cosmetics with excellent spreadability, viscosity, moisturizing properties, water resistance, etc.

(Prior Art) Various thickeners (gelling agents) have been used to enhance 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 degree of surfactant is applied as a cosmetic base, in terms of practical properties, (a) "spreadability" ( It has disadvantages such as (b) it has a sticky or slimy feel (poor viscosity), and (c) it has poor water resistance and tends to cause makeup to come off due to sweating, etc. Furthermore, they have various problems such as poor skin safety, and are not always 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 mucin (Mucin)
The present inventors have discovered that an O/W type or W10 type emulsified cosmetic composition, which is a combination of cin), an oily substance, and water, can solve all of the above-mentioned problems, and have completed the present invention.

(Objective of the Invention) That is, the object of the present invention is to provide O2 with excellent storage stability, skin safety, and practical properties (spreadability, viscosity, moisture retention, and water resistance).
/W type or W2O type emulsified cosmetic i.

(Structure of the Invention) The present invention provides dextrin fatty acid ester, mucin,
It is an oil phase/water phase type or water phase/oil phase type emulsified cosmetic made by blending an oily substance and water.

(Specific current use of the structure) The DFE used in the present invention is a known substance, and is
No. 2-25039 describes an esterified product of DFE course unit dextrin and higher fatty acid, 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, DFE (hereinafter abbreviated as 5-DFE), which is an esterified product with the above-mentioned higher saturated fatty acids, and DFE, which is an esterified product with unsaturated or side chain higher fatty acids. (Hereinafter abbreviated as L-DFE)
When blended in combination with the following, it was found that excellent properties were exhibited in the various tests described below.

The amount of DFE blended is 0.0% based on the total weight of the cosmetic.
2 to 5.0 hm% (hereinafter abbreviated as wt%) is preferred; less than 0.2 wt% results in poor storage stability;
．． If it exceeds 0 wt%, the appearance characteristics and practical properties such as viscosity of the dosage form will deteriorate.

The mucin used in the present invention is a known substance, and generally refers to a highly viscous sticky substance produced by animal epithelial cells, mucous membranes, salivary glands, etc., and can be stably obtained industrially. - It is a viscous substance obtained from the stomach or saliva of mammals (especially cows, cows).

The manufacturing method may be according to, for example, the description in US Pat. No. 2,305,714, and an example thereof is described in the following experimental example.

(Experimental example) (1) Remove the stomach from a duck immediately after slaughter and remove its contents.

(2) After separating the gastric fundus lining from the obtained stomach and removing the stomach fundus, 3.4 kg of gastric mucosa is obtained.

(3) The gastric mucosa obtained in (2) is placed in a glass-lined tank containing 10 times the amount of 0.5% hydrochloric acid solution, stirred for a short time at room temperature, and pulverized.

(4) Since a solution part and a precipitate part are formed, a clear filtrate (31 lengths) is obtained by filtration.

(5) Add sodium carbonate to the filtrate obtained in (4),
After adjusting the pH to 4.5, add the same amount of ethanol as this aqueous solution and leave it at 4°C overnight.

(6) Wash the obtained precipitate with water several times.

(7) Add acidic sodium carbonate water and adjust the pH to 7.0.

(8) Dry the aqueous solution by spray drying to obtain 65 g of powder (hawk stomach mucin).

In addition, cow saliva 41 was collected and used in (5) of the above experimental example.
61 g of bovine saliva mucin was obtained by performing the same treatment as described above.

The characteristic values and analytical values of each mucin obtained above are listed in the table below.

In the present invention, the amount of mucin blended is 0 based on the total amount.
．． A range of 2 to 2.0 wt% is suitable.

If the amount is less than 0.2 wt%, the storage stability will be poor, and if it is more than 2.0 wt%, the appearance characteristics and practical properties such as viscosity of the dosage form will deteriorate.

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.

The blending amount is usually 10% based on the total amount of the cosmetic.
~70wt%.

In addition, the water is commonly used purified water, such as deionized purified water treated with an ion exchange resin or distilled water, and the blending amount is 20 to 80 w based on the total amount.
It is preferable to set it as t%.

In addition to the above, the emulsified cosmetic of the present invention may contain ordinary cosmetic raw materials such as surfactants, fragrances, preservatives, humectants, pigments, pigments, etc. to achieve the purpose of the present invention. It can be blended as appropriate within the range.

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 0°05g of the sample was applied to the skin of the pressure side of the forearm of 25 subjects using a patch test plaster with a circular lint cloth with a diameter of 1.0cm for 24 hours. The skin condition 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 were ``good spreadability when applied'', ``no sticky or slimy feeling'', and ``leaving the skin moist and moisturized'' for test items such as spreadability, viscosity, moisture retention, and water resistance. This is shown by the number of people who answered, ``My makeup doesn't smear easily or my hair gets messy due to sweat.''

Examples 1 to 4, Comparative Examples 1 to 4 [0/W type skin cream] Each 0/W type skin cream was prepared by blending various DFEs and mucins as shown in Table 1, as shown in the composition below. was prepared and the various tests described above were conducted.

(1) Composition In addition, in Comparative Examples 1 and 2, the amount of POE sorbitan monostearate (20EO) as the component (B) was increased to 3.0 wt%, and the component (C) contained in addition to the above table. Q, 5 wt % of cetyl alcohol sulfate Na salt was added and blended.

(2) R manufacturing method Among the components (A), DFE is mixed into the (B) component, mucin is mixed into the (C) component, and the (2) and (C) components are heated to 80°C. Dissolved by heating. Next, components (B) and (C) were mixed and cooled to 30°C while stirring to prepare each skin cream.

(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 and 4, in which FE or mucin was blended alone, were clearly inferior in storage stability.

Examples 1 to 4, which are palm≠emulsion type cosmetic forests of the present invention, exhibited excellent properties in all of the various tests, and in particular, L-DFE and 5-
Example 4 containing DFE 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.

(1) Composition In Comparative Examples 5 and 6, the component (B), sorbitan sesquioleate, was added to 5.5%. The amount was increased to Qwt%, and in the component (C),
In addition to the above table, calcium stearate f! :3.5w
t% was added.

(2) Characteristics As shown in Table 2, 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 and 8, in which FE or mucin was blended alone, were clearly inferior in storage stability.

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

Examples 9-10, Comparative Examples 9-10 [O/W type makeup base] In the same manner as in Example 1, each OZW type makeup base was prepared with the following composition and various tests were conducted.

(1) Composition (2) Properties As shown in Table 3, Comparative Examples 9 to 1o, in which DFB or mucin was blended alone, were clearly inferior in storage stability.

Examples 9 to 1o, which are emulsified cosmetics of the present invention, exhibited excellent properties in all of the various tests, and in particular, L-DFE and 5-D
Example 10 containing FE 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 W2O 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 DPE or mucin was 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 oil phase/water phase type or water phase/oil phase type emulsified cosmetic comprising a dextrin fatty acid ester, mucin, an oily substance, and water.