Photocrosslinkable compositions for lithographic printing plates
US4224399A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1979 |
| Grant date | Sep 23, 1980 |
| Priority date | — |
| Expiry date | Apr 25, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/128
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lithographic printing plate in which the oleophilic imaging areas are formed as a thin cross-linked block copolymer film adhered to the hydrophilic surface of a backing plate. The block copolymer comprises blocks of copolylacrylate and polyurethane wherein the copolyacrylate blocks are a copolymer of a hydroxy-containing acrylate and a second acrylate component comprising one or more esters of acrylic acid or methacrylic acid or mixtures thereof and the polyurethane blocks are formed of polyoxybutylene as the prepolymer component. In forming the printing plate the block copolymer is deposited as a thin film containing an ultraviolet initiator and a cross linking promoter and the cross-linked imaging areas are formed by exposure to ultraviolet radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.