Composite polymer particle and method for preparing same

A composite polymer and particle technology, which is applied in pharmaceutical formulations, cosmetic preparations, toiletry preparations, etc., can solve the problems of inability to obtain defense effects, usability and transparency, etc.
CN1488666AInactive Publication Date: 2004-04-14KAO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KAO CORP
Publication Date
2004-04-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a polymer composite particle having superb blending stability even in a W / O emulsion cosmetic, a highly effective ultraviolet protection effect and a good feeling in use. The invention also relates to a method of producing the polymer composite particle and a cosmetic composition containing the polymer composite particle. A preferred polymer composite particle contains a metal oxide coated with a silicone and / or fluorine compound and has an average particle diameter of 1 mu m or less, wherein the polymer composite particle is obtained by polymerizing a crosslinking agent with a vinyl monomer contained in an amount of 25% by weight based on 100% by weight of the sum of total of all the monomers and crosslinking agent and wherein the vinyl monomer has a solubility parameter calculated by the Fedors method of less than about 8.9. A preferred cosmetic composition may contain (A) a microparticle metal oxide having an average primary particle diameter of from 0.001 to 0.1 mu m, and (B) a flake zinc oxide having an average primary particle size of from 0.1 mu m to 1 mu m and an average thickness of from 0.01 mu m to 0.2 mu m, which provides ultraviolet protection ability and visible-light transmittance.
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Description

technical field

[0001] The present invention relates to metal oxide-containing composite polymer particles excellent in compounding stability, usability, and ultraviolet protection ability for W / O-based cosmetics, a method for producing the same, and cosmetics containing the composite polymer particles. Background technique

[0002] In cosmetics, ultraviolet absorbers are used for the purpose of protecting the skin from ultraviolet rays. Ultraviolet absorbers can be broadly classified into organic and inorganic systems. The former include cinnamic acid derivatives, benzophenone derivatives, methylaminobenzoic acid derivatives, and salicylic acid derivatives. The latter include zinc oxide , titanium oxide, cerium oxide, iron oxide and other metal oxides. In the case of an organic ultraviolet absorber, there are problems that the absorption wavelength range is low, the compound is unstable, and the effect of penetrating into the skin cannot be sustained. In the case of an in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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