US 2001/0055618 A1Published application

Aqueous dispersion of globular silicone elastomer particles

AssigneeShin-Etsu Chemical Co., Ltd.

InventorsYoshinori Inokuchi, Ryuji Horiguchi

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Abstract

The invention discloses an aqueous slurry of globular particles of a silicone-based composite elastomer consisting of titanium dioxide particles and a crosslinked silicone elastomer as the matrix for the titanium dioxide particles. The aqueous dispersion comprises from 10 to 60% of the globular elastomer particles of 0.1 to 100 μm diameter, from 0.1 to 30% by weight of a surfactant which is preferably an anionic surfactant such as a salt of a dialkyl sulfosuccinate and the balance of water. The aqueous dispersion of the globular elastomer particles is quite satisfactory as an ultraviolet-shielding adjuvant in water-base cosmetic or toiletry preparations in respect of good stability of dispersion, high ultraviolet-shielding power and surface lubricity.

Claims8

Dependent claims

An aqueous dispersion of globular particles of a silicone-based composite elastomer which comprises:

(A) from 10 to 60% by weight of globular particles of a silicone-based composite elastomer having an average particle diameter in the range from 0.1 to 100 μm and consisting of (A1) from 0.1 to 50% by weight of particles of titanium dioxide and (A2) from 99.9 to 50% by weight of a crosslinked organopolysiloxane as a cladding layer of the component (A1) comprising at least 70% by moles of diorganosiloxane units represented by the general unit formula —(—SiR2—O—)—, in which R is a monovalent hydrocarbon group having 1 to 6 carbon atoms;
(B) from 0.1 to 30% by weight of a surfactant;
and
(C) the balance of the components (A) and (B) to 100% by weight of water as a dispersion medium or dissolving medium of the components (A) and (B).

1 more element

Dependencies are inferred from the claim text.