Cosmetic formulations comprising ZnO nanoparticles
US7182938B2 · kind B2 · utility
35Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2005 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Mar 9, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/64
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to the formation of surface treated zinc oxide and titania particles, and in particular zinc oxide and titania nanoparticles, with a siloxane star-graft copolymer coating, comprising a looped and/or linear polymeric structure on a star-graft copolymer coating, on a particle surface to control the interfacial surface interactions between the particle and the oil phase of the cosmetic skin formulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.