Ultraviolet light absorbers having two different chromophors in the same molecule
US4745194A · kind A · utility
3Cited by
1References
2Claims
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Key dates
| Filing date | Oct 6, 1983 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Oct 6, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3475
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ultraviolet light absorbing compounds having two different chromophors in the same molecule, particularly the benzotriazole chromophor and either the dihydroxybenzophenone or dihydroxyacetophenone chromophor; specifically, the two compounds 3,5-[di(2H-benzotriazole-2-yl)]-2,4-dihydroxyacetophenone and 3,5-[di(2H-benzotriazole-2-yl)]2,4-dihydroxybenzophenone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.