Photographic silver halide element having antistatic properties
US5364752A · kind A · utility
2Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Aug 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/89
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A recording material comprising a sheet, ribbon or web support and a hydrophilic colloid binder layer incorporating an ionic copolymer in the form of dispersed particulate material providing to said material an antistatic character, characterized in that said ionic copolymer is a cross-linked addition copolymer wherein at least 30 mole % of its recurring units are recurrring units containing a sulphonic acid salt group that has been obtained via a reaction of propane sultone or butane sultone with carboxylate salt groups present originally in recurring units of said copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.