Oil-in-water type emulsion cosmetic

An emulsified cosmetic, oil-in-water type technology, applied in the direction of cosmetics, cosmetic preparations, dressing preparations, etc., can solve the problems of insufficient satisfaction, etc., to inhibit melanin production, promote collagen production, and inhibit peroxidation The effect of lipids

Pending Publication Date: 2019-11-15
NIKKO CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Regarding the improvement of the stability of L-ascorbic acid tetra fatty acid ester in the preparation, although it has been reported that the prevention of coloring and The method of odor generation (Japanese Patent Laid-Open No. 2004-331524), but even so is still not sufficiently satisfactory

Method used

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  • Oil-in-water type emulsion cosmetic
  • Oil-in-water type emulsion cosmetic
  • Oil-in-water type emulsion cosmetic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1( Embodiment 1-1、1-2

[0095] Example 1 (Example 1-1, 1-2): Evaluation of pH

[0096] Measure the first phase and the second phase shown in Table 1 respectively, heat to ··°C, and dissolve uniformly. Next, the first phase was gradually added to the second phase, stirred and emulsified with a homomixer, cooled to 40° C., and the third phase was added to obtain a cosmetic. The numerical value of each component in a table shows mass %.

[0097] [Table 1]

[0098]

[0099] As a result, since pH was adjusted using the polar oil of (B) component, the chelating agent of (C) component, and the antioxidant of (D) component, the hydrolysis of (A) component was suppressed. In the case of pH 6 or less, hydrolysis of (A) component was further suppressed in Example 1-1 of pH 5.5 or less which was lower in pH.

Embodiment 2( Embodiment 2-1、2-2

[0100] Example 2 (Example 2-1, 2-2): Buffer evaluation

[0101] Cosmetics were prepared in the same manner as in Example 1 using each component shown in Table 2.

[0102] [Table 2]

[0103]

[0104] As a result, since the polar oil of (B) component, the chelating agent of (C) component, the antioxidant of (D) component, and the higher alcohol (3.50% by mass) of (G) component were used, and the pH was adjusted, the (A) Hydrolysis of component. In the case of pH 6 or less, hydrolysis of (A) component was further suppressed in Example 2-2 of pH 5.5 or less which was lower in pH. In addition, in Example 2-2, the use of succinic acid having a chelating effect as a pH adjuster is considered to have an influence on suppression of hydrolysis of the component (A).

Embodiment 3( Embodiment 3-1、3-2、3-3

[0105] Embodiment 3 (embodiment 3-1, 3-2, 3-3): Chelating agent evaluation

[0106] Cosmetics were prepared in the same manner as in Example 1 using each component shown in Table 3.

[0107] [table 3]

[0108]

[0109] As a result, since the polar oil of (B) component, the chelating agent of (C) component, the antioxidant of (D) component, a small amount of (G) component (3.50% by mass) were used, and the pH was adjusted, the ( A) Hydrolysis of ingredients. The effect of suppressing the hydrolysis of component (A) by the chelating agent of component (C) is in the order of succinic acid (Example 3-3), EDTA (Example 3-1), and EDTA-2Na (Example 3-2). The presence of Na ions is the cause of the decrease in the inhibitory effect of Example 3-2.

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Abstract

This oil-in-water type emulsion cosmetic has a pH of 6 or less and contains as essential components: (A) a tetra-fatty acid ester derivative of L-ascorbic acid which is represented by formula (I) (wherein R represents a branched C8-C18 alkyl fatty acid residue); (B) a polar oil which is liquid at 25oC and has an IOB value of 0.1-0.5; (C) a chelating agent; (D) an antioxidant; and (E) water.

Description

technical field [0001] The present invention relates to an oil-in-water emulsified cosmetic having excellent stability of an L-ascorbic acid tetra fatty acid ester derivative. Background technique [0002] L-Ascorbic acid fatty acid ester has the physiologically active Pentetic Acid (Pentetic Acid) and its salt action and pharmacological action as vitamin C, and because of its lipophilicity different from L-Ascorbic acid and L-Ascorbate, it is suitable for cosmetics. The purpose of imparting vitamin C activity is especially used in cosmetics containing a large amount of oil phase ingredients (see page 305 of the cosmetics handbook, edited by Nikko Chemicals, issued on November 1, 1996; Japanese Patent Application Laid-Open No. 9-65864 and Japanese Patent Application Kaiping No. 7-232051 Bulletin). [0003] However, their melting point is as high as 110°C to 120°C, and they have low solubility in oil and are insoluble in water. Therefore, in the case of blending L-ascorbic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/06A61K8/37A61K8/44A61K8/67A61K8/92A61Q19/00
CPCA61K8/37A61Q19/00A61K8/676A61K8/375A61K8/062A61K2800/51A61K8/34A61K8/362A61K8/365A61K8/44
Inventor 村社敬子S.田中
Owner NIKKO CHEM
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