2-hydroxyphenyl benzotriazole based UV absorbing polymers with particular substituents and photographic elements containing them
US5674670A · kind A · utility
3Cited by
13References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1996 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Mar 18, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/132
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A photographic element comprising a light sensitive portion and an ultraviolet absorbing polymer comprising repeating units of a 2'-hydroxphenyl benzotriazole with a 5- or 6-substituent selected from halogen, cyano, carboxy or a sulfonyl, and a 4'-alkoxy group in which the alkylene portion of the alkoxy is linked, in sequence through a first optional bivalent linking group, then an oxygen, sulfur or amino group, then a second optional bivalent linking group, to the polymer chain, provided that the 3'-position is unsubsituted and the 4'-substituent does not have any --NH--, --OH or --SH substituents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.