Production of photopolymeric flexographic relief printing plates

US5252432A · kind A · utility

Assignee

• BASF SE

Inventors

• Helmut Bach · Mutterstadt, DE
• Thomas Telser · Weinheim, DE
• Gernot Dietz · Eisenberg, DE

Key dates

• Filing date: Jan 14, 1993
• Grant date: Oct 12, 1993
• Expiry date: Jan 14, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/325
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In a novel, improved process for the production of photopolymeric flexographic relief printing plates from photosensitive recording elements which contain PA1 A) a dimensionally stable substrate and PA1 B) at least one photopolymerizable recording layer having PA2 b.sub.1) at least one elastomeric polymer as a binder, PA2 b.sub.2) at least one photopolymerizable monomer which is compatible with the binder (b.sub.1) and PA2 b.sub.3) at least one photopolymerization initiator, by PA1 (1) imagewise exposure of the photopolymerizable recording layer (B) to actinic light and PA1 (2) washout (development) of the unexposed and therefore nonphotopolymerized parts of the imagewise exposed recording layer (B) with an organic developer with formation of a relief layer, the organic developers used are 3-methoxy-n-butyl acetate and/or n-butyl glycolate.