Water developable lithographic composition
US4772538A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1985 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Aug 2, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S522/904
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to a radiation polymerizable composition for use in a photographic element such as a lithographic printing plate comprising in admixture PA0 (a) a binder resin having the general formula EQU --A--B--C-- PA0 wherein a plurality of each of components A, B and C occur in ordered or random sequence in the resin and wherein A is present in said resin at about 5% to about 20% by weight and comprises groups of the formula ##STR1## B is present in said resin at about 4% to about 30% by weight and comprises groups of the formula ##STR2## and C is present in said resin at about 50% to about 91% by weight and comprises acetal groups consisting of groups of the formulae ##STR3## where R is lower alkyl or hydrogen, and wherein said group I is present in component C from about 75% to about 85%, group II is present in component C from about 3% to about 5%; and group III is present in component C from about 10% to about 22%; PA0 (b) a photoinitiator; PA0 (c) a photopolymerizable mixture of PA1 (1) a polyethoxylate diacrylate monomer; and PA1 (2) an oligomeric amine diacrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.