Back to results
US 10,590,278 B2Granted
Coated powders having high photostability
AssigneeNanophase Technologies Corporation
InventorsHarry W. Sarkas, Abigail R. Hooper, Nathan H. Hoffmann
Life of this patent
Estimating the term…
Abstract
A coated powder comprises (a) particles, and (b) a coating on the surface of the particles including (1) silica moieties, (2) organo oxysilane moieties selected from the group consisting of mono-organo oxysilane moieties, bi-organo oxysilane moieties and tri-organo oxysilane moieties, and (3) poly(dialkyl)siloxane moieties. The amount by weight in SiO2 equivalents of the organo oxysilane moieties and the silica moieties is at least 0.0625% of the total coated powder weight per m2/g of the specific surface area of the particle to be coated.
Claims19
A coated powder, comprising:
- (a) particles, and
- (b) a coating, on the surface of the particles, including
- (1) silica moieties,
- (2) organo oxysilane moieties selected from the group consisting of mono-organo oxysilane moieties, bi-organo oxysilane moieties and tri-organo oxysilane moieties, and
- (3) poly(dialkyl)siloxane moieties,
- wherein the amount by weight in SiO2 equivalents of the organo oxysilane moieties and the silica moieties is at least 0.0625% of the total coated powder weight per m2/g of the specific surface area of the particle to be coated,
- the particles comprise at least one oxide selected from the group consisting of ZnO, TiO2 and mixtures thereof, and
- the coated powder is super-photostable.
5 more elements
Dependencies are inferred from the claim text.