2-Hydroxybenzophenone derivatives
US4029684A · kind A · utility
10Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | May 16, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/326
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention concerns novel 2-hydroxybenzophenone derivatives and metal complexes thereof of the formula: ##STR1## wherein Z.sub.1, Z.sub.2, Y.sub.1 and Y.sub.2 are each, independently, hydrogen or a substituent, at least one of Y.sub.1 and Y.sub.2 being a group ##STR2## wherein, R.sub.1 is alkyl R.sub.2 is hydrogen or a substituent and A is oxygen, sulphur or ##STR3## The compounds are useful for stabilizing organic material, e.g. plastics, against degradation under the influence of U.V. radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.