Patent ID: 6482441
Filing Date: 2002-11-19
Classification: A61K,A61Q

Abstract:
A surface-treated powder, comprising a powder usable for cosmetics, and coating layers of surface treating agents of a layer A and a layer B, each formed on at least a portion of the powder particle surface,wherein said layer A is a coating layer of a surface treating agent that is a solid at room temperature, said coating layer containing at least one compound selected from the compounds in a reactive organo polysiloxane, a polyolefin, a hydrogenated lecithin or its salt form, an N-acylamino acid or its salt form, a fatty acid or its salt form, and a dextrin fatty acid ester; and wherein said layer B is a coating layer of a surface treating agent that is a liquid at room temperature, said coating layer containing at least one compound selected from the compounds in an organo polysiloxane modified at its sole terminal end with a functional group, an alkylsilane modified at its sole terminal end with a functional group, and a branched fatty acid wherein said layer A is formed on the outermost surface of the particle and said layer B is formed on the outermost surface of layer A.