Oil-in-water emulsified cosmetic composition

a technology oil-in-water emulsifier, which is applied in the field of oil-in-water emulsified cosmetic composition, can solve the problems of affecting the appearance of skin, affecting the quality of skin, and difficult to maintain the stability of ceramide in the formulation,

Inactive Publication Date: 2005-01-20
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is generally known that a decrease of horny ICL, especially of ceramides, triggers detrimental conditions in the skin, such as rough skin, dry skin or aged skin.
Nonetheless, it is difficult to maintain the stability of a ceramide in a formulation, because it tends to crystallize readily and has a high melting point.
This process is, however, not adequate for imparting a variety of functions and does not result in an adequate good skin feeling composition, because the oil agent to be used in combination is limited to those having good compatibility with a ceramide.
When a mixture of a ceramide with the other oil component is emulsified, such an oil-in-water emulsified cosmetic composition tends to worsen the feeling upon use and the emulsion itself becomes less stable.

Method used

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  • Oil-in-water emulsified cosmetic composition
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  • Oil-in-water emulsified cosmetic composition

Examples

Experimental program
Comparison scheme
Effect test

example 5

(Cosmetic Emulsion)

The cosmetic emulsion having the composition as shown in Table 2 was prepared by the process described below. The cosmetic emulsion thus obtained was excellent in both emulsion stability and feeling upon use.

(Preparation Process)

Components from (3) to (7), (11) and (13) are dissolved under heat at 90° C. The resulting solution and another solution obtained by dissolving Components (1) and (2) in 5 weight % of water under heat at 90° C. are stirred for 20 minutes with a propeller, stirred in a homomixer (at 7000 rpm), and cooled to 25° C. while stirring with a propeller, whereby a ceramide emulsion is obtained.

In a homomixer (at 7000 rpm), Components from (8) to (10) are dispersed in another solution obtained by dissolving Component (12) in the remaining water, followed by the addition of the ceramide emulsion. They are mixed by stirring to obtain a cosmetic emulsion.

TABLE 2(Component)(weight %)A1Phytosphingosine0.2B2L-Glutamic acid0.09C3Pseudo type ceram...

example 6

(Cosmetic Lotion)

A cosmetic lotion having the composition as shown in Table 3 was prepared by the process described below. This Cosmetic lotion was excellent in both emulsion stability And feeling upon use.

(Preparation Process)

Components (1), (3), (7) and a portion (about 3 weight %) of Component (6) are dissolved under heat at from 80 to 90° C. To the resulting solution, another solution obtain by dissolving Component (2) and a portion (about 6 weight %) of water under heat at 80° C. is added in portions while stirring with a propeller and the reaction mixture is retained for 20 minutes. After addition of water (about 50 weight %) heated to about 80° C., the mixture is cooled to 25° C. while stirring with a propeller, whereby a ceramide emulsion is obtained.

Components (4) and (5) and the remaining portion of Component (6) are dissolved under heat at from 80 to 90° C. While stirring with a propeller, the remaining water is added in portions to the resulting solution. After c...

example 7

(Cosmetic Emulsion)

The cosmetic emulsion having the composition as shown in Table 4 was prepared by the process described below. The cosmetic emulsion thus obtained was excellent in both emulsion stability and feeling upon use.

(Preparation Process)

Components from (3) to (7), (11) and (13) shown in Table 4 are dissolved under heat at 90° C. The resulting solution and another solution obtained by dissolving Components (1) and(2) in a portion (about 5 weight %) of water under heat at 90° C. are stirred with a propeller for 20 minutes, stirred in a homomixer (at 7000 rpm) and cooled to 25° C. while stirring with a propeller, whereby a ceramide emulsion is obtained.

In a solution obtained by dissolving Component (12) in the remaining water, Components (8) to (10) are dispersed using a homomixer (at 7000 rpm), followed by the addition of the ceramide emulsion. They are mixed while stirring to obtain a cosmetic emulsion.

TABLE 4(Component)(weight %)A1Pseudo type sphingosine0.2B2L-G...

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Abstract

The present invention relates to an oil-in-water emulsified cosmetic composition, which contains an emulsion having (A) a sphingosine represented by formula (1), (B) an acid compound selected from inorganic acids and organic acids having 5 or less carbon atoms, and (C) a ceramide represented by formula (2); and another emulsion having (D) an oil component selected from polar oils and hydrocarbon oils, and (E) a surfactant. (wherein, R1 represents a hydrocarbon group which may have a substituent; Y represents methylene, methine or O; X1, X2 and X3 each represent H, OH or acetoxy group; X4 represents H, acetyl group or the like; R2 and R3 each represents H, OH or the like; R represents H, amidino group or the like; and a stands for 2 or 3) (wherein, R7 represents a hydrocarbon group which may have a substituent, or H; Z represents methylene, methine or O; X5, X6 and X7 each represent H, OH or acetoxy group; X4 represents H, acetyl group or the like; R8 and R9 each represent H, OH or the like; R10 represents a hydrocarbon group which may have a substituent; and R11 represents H or a hydrocarbon group which may have a substituent). The oil-in-water emulsified cosmetic composition contains a ceramide and is excellent in emulsion stability.

Description

FIELD OF THE INVENTION The present invention relates to an oil-in-water emulsified cosmetic composition containing a ceramide-containing oil component. BACKGROUND OF THE INVENTION The stratum corneum, the outermost layer of skin, prevents ingress of harmful substances into the skin and moisture loss from the skin and at the same time, has a function of keeping flexibility or smooth appearance of the skin by retaining water in itself. Lipids called horny intercellular lipids (which will hereinafter be called “horny ICL”) exist so as to fill the interstices between numerous corneocytes. In this horny ICL, almost 50% of the lipids are ceramides, and there are also cholesterol, cholesterol esters, fatty acids and the like. It is generally known that a decrease of horny ICL, especially of ceramides, triggers detrimental conditions in the skin, such as rough skin, dry skin or aged skin. The stratum corneum having a deteriorated function can be improved by the external use of ceramide a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K8/06A61K8/36A61K8/41A61K8/42A61K8/63A61K8/68A61K8/92A61Q19/00
CPCA61K8/06A61K8/062A61K8/36A61K8/41A61Q19/00A61K8/63A61K8/68A61K8/922A61K8/42
Inventor YAMAMOTO, YUMIKO
Owner KAO CORP
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