Photopolymerizable composition for the production of printing plates and relief plates, and the elements produced therewith

US4272611A · kind A · utility

Assignee

• BASF SE

Inventors

• Rudolf Vyvial · Ludwigshafen, DE
• Guenter Wallbillich · Schifferstadt, DE
• Horst Trapp · Plankstadt, DE

Key dates

• Filing date: Oct 22, 1979
• Grant date: Jun 9, 1981
• Expiry date: Oct 22, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/11
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A photopolymerizable composition for the production of water-developable printing plates and relief plates, based on a water-soluble or water-dispersible mixture, containing a photoinitiator, of PA1 (a) one or more water-soluble or water-dispersible polymers containing copolymerized N-vinylpyrrolidone units and/or one or more polymers containing vinyl alcohol units and PA1 (b) one or more olefinically unsaturated photopolymerizable monomers, which comprises, as an additive or as the sole polymer, a water-soluble modified vinyl alcohol polymer which contains from 5 to 75, especially from 10 to 60, % by weight of chemically bonded oxyethylene units. These modified vinyl alcohol polymers are in particular oxyethylated polyvinyl alcohol or hydrolyzed graft polymers of vinyl esters onto polyethylene glycols. The compositions are easier to process into printing plates and relief plates, and exhibit a long shelf life.