Hydrophilized silicone particles and making method
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsYoshinori Inokuchi, Mamoru Hagiwara, Naoki Omura
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Abstract
Surfaces of silicone particles are hydrophilized by plasma treatment. The hydrophilized silicone particles are readily dispersible in aqueous materials without a need for dispersants, typically surfactants. In aqueous cosmetic applications externally applied to the skin such as skin care cosmetics, make-up cosmetics, antiperspirant cosmetics, and UV care cosmetics, for example, products free of skin irritation concern can be formulated because formulation is possible without a need for surfactants.
Claims9
A uniform water dispersion of silicone particles made hydrophilic at their surfaces by plasma treatment;
- wherein the particles are not re-dispersible in water after the water has been removed from said dispersion.
A method for preparing hydrophilic silicone particles comprising plasma treating surfaces of hydrophobic silicone particles, wherein surfaces of hydrophobic silicone particles are hydrophilized by subjecting them to plasma polymerization treatment using a hydrocarbon gas, an oxygen-containing gas and optionally, a rare gas.
A cosmetic composition comprising a uniform water dispersion of silicone particles made hydrophilic at their surfaces by plasma treatment;
- wherein the particles are not re-dispersible in water after the water has been removed from said dispersion.
Dependencies are inferred from the claim text.