Cosmetic composition, cosmetic, and external preparation for skin
AssigneeDow Corning Toray Co., Ltd.
InventorsYoshitsugu MORITA, Mari WAKITA
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Abstract
A composite silicone rubber particle is disclosed, wherein a part or entire surface of the silicone rubber particle is covered by a fine particle, a surface of which is modified by a functional group containing quaternary ammonium salt. Manufacturing methods of the composite silicone rubber particle are also disclosed, as well as a cosmetic product composition containing the composite silicone rubber particle. The composite silicone rubber particle has hydrophilicity and dispersibility while maintaining excellent fluidity, contains no harmful methanol, and has antimicrobial activity.
Claims20
A composite silicone rubber particle, wherein a part or entire surface of the silicone rubber particle is covered by a fine particle, a surface of the fine particle being modified by a functional group containing quaternary ammonium salt.
A manufacturing method of a composite silicone rubber particle, said method comprising:
- forming a composite silicone rubber particle by mixing a fine particle and a silicone rubber particle using a mechanical force;
- and
- modifying a surface of the fine particle of the composite silicone rubber particle with a silicon compound having a functional group containing quaternary ammonium salt and being capable of forming a chemical bond on the surface of the fine particle.
A manufacturing method of a composite silicone rubber particle, said method comprising:
- modifying surface of a fine particle with a silicon compound having a functional group containing quaternary ammonium salt and being capable of forming a chemical bond on the surface of the fine particle;
- and
- forming a composite silicone rubber particle by mixing the fine particle with a silicone rubber particle using a mechanical force.
Dependencies are inferred from the claim text.