Negative-acting no-process printing plates
US6171735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Nov 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photosensitive composition is prepared containing a polymer of the formula B(X)(Y) wherein B represents an organic backbone, each X independently is an acidic group or salt thereof and each Y independently is a photocurable group and a photoinitiating compound or compounds. Preferably, free-radically polymerizable multi-functional monomer and/or oligomer is added to the photosensitive composition. The photosensitive composition can be coated on a suitable substrate for planographic printing plate applications. Imagewise irradiation causes the light struck regions to photocure, becoming insoluble in aqueous and organic mediums, while the non-light struck regions remain highly soluble/dispersable. Printing plates of this construction do not require processing prior to being run on a press.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.