Oleophilic, film-forming photopolymerizable diazo and epoxy resin compositions and lithographic plates prepared therefrom
US4315065A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Apr 16, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0217
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film-forming oleophilic photopolymerizable composition is formed from a fluid epoxy resin having an epoxy equivalent of less than 350 and a photosensitive condensation product of a paradiazodiphenylamine fluoroborate and an organic condensation agent. The photopolymerizable compositions can be used as the photosensitive layer of negative lithographic plates, such as printing plates. Acidic aqueous solvent-developable negative lithographic plates are also provided in which the photosensitive layer is formed from a layer of the film-forming oleophilic photopolymerizable composition which is deposited on a hydrophilic support from an organic solvent solution. The lithographic printing plates of the present invention have high mechanical resistance, long shelf-life and can be used in large production runs to make a great number of copies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.