Patent · US Active

Long wavelength shifted benzotriazole UV-absorbers and their use

US7695643B2 · kind B2 · utility

58Cited by

1References

19Claims

0Family size

Assignee

Ciba Specialty Chemicals Corporation · US

Inventors

Katharina Fritzsche · Weil am Rhein, DE
Adalbert Braig · Weil am Rhein, DE
Markus Frey · Rheinfelden, CH
Walter Fischer · Reinach, CH

Key dates

Filing date	Jan 23, 2006
Grant date	Apr 13, 2010
Priority date	—
Expiry date	Nov 7, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D487/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to novel benzotriazole UV-absorbers having a long wavelength shifted absorption spectrum with significant absorbance up to 410-420 nm. Further aspects of the invention are a process for their preparation, a UV stabilized composition containing the new UV-absorbers and the use of the new compounds as UV-light stabilizers for organic materials.

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