Composite pigment and method for preparing the same
US11523976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2012 |
| Grant date | Dec 13, 2022 |
| Priority date | — |
| Expiry date | Jul 13, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/654
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a composite pigment comprising at least one small hollow core particle and optionally at least one large core particle wherein the surface of the small hollow core particle is at least in part covered with at least one coating layer comprising at least one inorganic solid UV filter, and the surface of the large core particle is optionally at least in part covered with at least one coating layer comprising at least one inorganic solid UV filter and/or at least one coloring pigment. The composite pigment according to the present invention can provide enhanced UV filtering effects and safety, and optionally enhanced coloring effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.