Cosmetic formulations comprising ZnO nanoparticles

Details Cosmetic formulations comprising ZnO nanoparticles Cosmetic formulations comprising ZnO nanoparticles

2007-02-27

2007-02-27

Dodson, Shelley A. (Department: 1616)

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

C424S060000, C424S400000, C424S401000

Reexamination Certificate

active

11074760

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.

REFERENCES:
patent: 5993967 (1999-11-01), Brotzman et al.
patent: 6033781 (2000-03-01), Brotzman, Jr. et al.
patent: 2005/0222325 (2005-10-01), Brotzman, Jr.

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