Patent ID: 9597268
Date: 2017-03-21
CPC Classifications: A61K,A61Q,C09C

Claim:
1. A plate-like powder for a cosmetic composition, said powder having particles with an average particle diameter in a range of from 0.01 to 700 μm as a starting material that are surface-treated with a silicone gel by forming the silicone gel thereon in an in-situ method that comprises hydrolyzing and condensing an organopolysiloxane containing at least (i) a diorganopolysiloxane with reactive opposite ends expressed by the following formula (1) and (ii) at least one crosslinking agent selected from the group consisting of (a) a silane coupling agent having the following formula (2) and at least two hydrolyzable groups per one molecule and (b) a reactive organopolysiloxane of the following formula (3): wherein R wherein R wherein R a ratio between the diorganopolysiloxane with the reactive opposite ends and the crosslinking agent is in a compounding range of 100/0.1 to 100/35 wt %, and the silicone gel has a finely three-dimensional crosslinking structure of the diorganopolysiloxane, and when the silicone gel is obtained by effecting the method in the absence of the plate-like powder, the silicone gel has a complex modulus of 3,000 to 100,000 Pa and a loss coefficient tan δ of 1.0 to 2.5 in measurement of a dynamic viscoelasticity of a distortion factor of 17% at 25° C. and at a shear frequency of 4 Hz, and a measured value of the silicone gel measured by a measuring method with a durometer AO is 0.