Photographic element and polyester photographic film base therefor
US5639589A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | May 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/7954
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polyester photographic film support having a surface coated with a subbing layer which comprises a mixture of gelatin and a polymer where the gelatin to polymer ratio is less than 97:3 and such that the combination of dry coverage and weight fraction of gelatin in the mixture satisfies the equation: C+1.32.times.Z.gtoreq.0.825, where C is dry coverage in g/m.sup.2 and Z is the weight fraction of gelatin, and the polymer comprises: a) from 1 to 60 weight percent of recurring units derived from a vinyl monomer having a primary amine addition salt component or aminostyrene addition salt component; b) from 0 to 50 weight percent of recurring units derived from a hydrophilic vinyl monomer; and c) from 20 to 98 weight percent of recurring units derived from a hydrophobic nonionic vinyl monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.