Bis(alkyleneoxybenzophenone) ultraviolet light absorbers
US6537670B1 · kind B1 · utility
19Cited by
10References
74Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Nov 3, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31971
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to novel bisbenzophenones and the use thereof as an ultraviolet light absorber. The presently claimed compounds are particularly useful, either alone or in combination with other additives, including other ultraviolet light absorbers, antioxidants and stabilizers, in stabilizing polymers and other materials from degradation by environmental forces such as actinic radiation (ultraviolet light), oxidation, moisture, atmospheric pollutants and combinations thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.