Benzophenones containing an ester functional group and their use in polymers
US5281645A · kind A · utility
4Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Jul 24, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C69/007
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to new hydroxybenzophenones containing an ester functional group and to the use of these compounds as UV absorbers in organic polymers. More precisely, the new hydroxybenzophenones are 1,3-di(4-benzoyl-3-hydroxyphenoxy)-2-propanol carboxylates which preferably have a molecular mass of at least 500. These benzophenones can be employed as anti-UV agents in organic polymers, either by themselves or jointly with known benzophenones of lower molecular mass, such as 2-hydroxy-4-alkoxybenzophenones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.