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Easily-dispersible powder, the surface of which has undergone lipophilization treatment, and cosmetic blended therewith

A technology of surface treatment and surface treatment agent, applied in the field of lipophilic surface treatment powder, can solve problems such as poor dispersibility, and achieve the effect of good makeup durability and excellent characteristics

Inactive Publication Date: 2012-03-07
MIYOSHI KASEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Treatment with a solid substance at room temperature tends to aggregate, resulting in poor dispersibility (Patent Document 4, Patent Document 5)

Method used

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  • Easily-dispersible powder, the surface of which has undergone lipophilization treatment, and cosmetic blended therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 2 kg of microparticle titanium oxide (manufactured by Ishihara Sangyo Co., Ltd.: TTO-S-3) was put into a Henschel mixer, and octyltriethoxysilane (Toray Dow Corning Co., Ltd. (Toray Dow Corning Co., Ltd.: Z-6341) 300 g and a liquid mixture of reactive organosiloxane (Shin-Etsu Chemical Co., Ltd.: X-24-9171) 60 g were stirred for 30 minutes. Then, after pulverizing with a jet mill (manufactured by Alpine (Germany): 100AFG type) with a crushing pressure of 4 kg and a classification speed of 10,000 rpm, it was dried at 110° C. for 9 hours with a hot air dryer to obtain lipophilicity. Surface treatment powder.

Embodiment 2

[0061] The lipophilic surface-treated powder was obtained under the same production conditions as in Example 1, except that fine-grained zinc oxide (manufactured by Imperial Chemicals (Tayca): MZ-500) was used instead of the fine-grained titanium oxide in Example 1.

Embodiment 3

[0063] Put 100 g of microparticle titanium oxide (manufactured by Imperial Chemical Industry Co., Ltd.: MT-500SA) into 1500 ml of a mixed solution of deionized water / IPA=50 / 50, and add hexyltriethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd.: KBE-3063) 8g and isohexadecanoic acid 6g, with a sand mill (DYNO-Mill: 1.4L zirconia container & blade, filling rate of 0.5mmφ zirconia beads 85%) by 30 minutes circulation To disperse. The dispersion liquid was dried under reduced pressure at 100° C. for 7 hours with a vacuum dryer, and then pulverized with a jet mill at a crushing pressure of 5 kg and a classification rotation speed of 10,000 rpm to obtain a lipophilic surface-treated powder.

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Abstract

Provided is a surface-treated powder, the surface of which has been treated by a surface-treatment agent comprising either one compound selected from either group A or B, or a mixture of one compound from each A and B, where A includes alkylalkoxysilanes represented by general formula (1) and B includes both reactive organosilicones represented by general formula (2) as well as saturated and unsaturated C12-22 branched fatty acids (including those in salt form). The surface-treated powder is particularly usable as a cosmetic and is easily dispersible. In general formula (1):(CnH2n+1)aSi(OCmH2m+1)b, n is an integer from 1 to 18, m is an integer from 1 to 3, and a and b are each integers from 1 to 3 that sum up to 4. In general formula (2):R1 3SiO)(R1 2SiO)p(SiR2 3), each R1 independently represents either a C1-4 lower alkyl group or a hydrogen atom; R2 represents either an amino group, a hydrogen atom, a hydroxy group, or a C1-4 lower alkoxy group; and p is an integer from 1 to 300.

Description

technical field [0001] The present invention relates to a lipophilic surface-treated powder exhibiting easy dispersibility, and a cosmetic having improved feeling of use, makeup effect, and makeup durability by incorporating the surface-treated powder. Background technique [0002] The powder to be incorporated into cosmetics has a primary particle size ranging from nanometers to hundreds of microns, and the powder exists as an aggregate of particles with a primary particle size. Considering the function played in cosmetics, the primary particle size of the powder is set according to the chemical composition and particle size range of the powder. For example, in the case of titanium oxide, the primary particle size of the powder is set to a few microns in the geometrical optical range in order to improve the usability or shield infrared rays, and the primary particle size of the powder is set The particle size is set near the half-wavelength of visible light, that is, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/19A61K8/27A61Q1/02A61Q17/04C09C3/12
CPCA61K8/0241A61K8/11A61K8/27A61K8/29A61K8/361A61K8/585A61K8/891A61K2800/623A61Q1/02A61Q1/12A61Q17/04C01P2006/62C01P2006/65C09C1/028C09C1/043C09C1/28C09C1/3669C09C1/3684C09C1/3692C09C3/006C09C3/08C09C3/12
Inventor 佐藤和男井尻博文斋藤三也铃木正晴桑鹤伸也
Owner MIYOSHI KASEI
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