Production of photopolymeric flexographic relief printing plates

US5240815A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Telser · Weinheim, DE
• Helmut Bach · Mutterstadt, DE

Key dates

• Filing date: Jun 24, 1991
• Grant date: Aug 31, 1993
• Expiry date: Jun 24, 2011

Classification

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

Abstract

In a novel process for the production of a flexographic relief printing plate from a photosensitive recording element which contains PA0 A) a dimensionally stable substrate and PA0 B) at least one photopolymerizable recording layer having PA1 b.sub.1) at least one elastomeric polymer as a binder, PA1 b.sub.2) at least one photopolymerizable monomer which is compatible with the binder (b.sub.1) and PA1 b.sub.3) at least one photopolymerizable initiator, by PA0 (1) imagewise exposure of the photopolymerizable recording layer (B) to actinic light and PA0 (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, wherein the organic developer contains from 1 pphm (1 part per 100,000,000) to 3% by weight, based on its total amount, of at least one antistatic agent.