Photographic elements containing directly dispersible UV absorbing polymers and method of making such elements and polymers
US5620838A · kind A · utility
0Cited by
8References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1994 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Dec 21, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polymeric UV absorbing compound which comprises UV absorbing monomeric units of at least 0.05 weight percent of ionic units which have an ionizable group which is ionized at all pH values between 5 to 10. Photographic elements which contain such polymeric compounds and methods of making such polymers and photographic elements, are also provided. The polymeric UV absorbing compounds are directly dispersible in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.