Process for preparation of photographic film involving corona treatment of polystyrene containing subbing layers and product
US4135932A · kind A · utility
7Cited by
3References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1976 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Sep 16, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/93
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic film bases and sensitized photographic films are produced by coating a supporting film with an aqueous dispersion or a solution in an organic solvent of an essentially water-insoluble homopolymer and/or copolymer of styrene and/or a styrene derivative to form an adherent polymeric subbing layer which is then subjected to a surface modifying, e.g. corona discharge, treatment. Light-sensitive photographic emulsions adhere directly to the treated subbing layer without the need for an intermediate gelatin subbing layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.