Patent · US Active

Nanoparticulate UV protectant with silicon dioxide coating

US8758501B2 · kind B2 · utility

1Cited by

7References

19Claims

0Family size

Assignees

Merck Patent GmbH · DE
Sachleben Chemie GmbH · DE

Inventors

Frank Pfluecker · Darmstadt, DE
Bernd Hirthe · Tönisvorst, DE
Heike Saenger · Moers, DE
Stephan John · Duisburg, DE

Key dates

Filing date	Apr 30, 2009
Grant date	Jun 24, 2014
Priority date	—
Expiry date	Jan 21, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2993
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The present invention relates to nanoparticulate UV protectants which are obtainable by hydrothermal treatment of a nanoparticulate metal oxide and subsequent application of a silicon dioxide coating, and to the preparation and use thereof. The present invention furthermore relates to novel compositions, in particular for topical application, which are intended, in particular, for light protection of the skin and/or of the hair against UV radiation, and to the use thereof in the above-mentioned cosmetic application.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.