Method of making a relief plate using a photopolymerizable recording composition

US4385109A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Lechtken · Bischofswerda, DE
• Bernd Bronstert · Otterstadt, DE
• Gerhard Hoffmann · Otterstadt, DE
• Rudolf Vyvial · Ludwigshafen, DE
• John Lynch

Key dates

• Filing date: Jul 9, 1981
• Grant date: May 24, 1983
• Expiry date: Jul 9, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/124
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A photopolymerizable recording composition which comprises a mixture, containing a photoinitiator, of (a) a photopolymerizable olefinically unsaturated monomer and (b) an organic polymeric binder, wherein the photoinitiator is an acylphosphine oxide compound of the formula R.sup.1 R.sup.2 PO--CO--R.sup.3, where R.sup.1 and R.sup.2 are certain organic radicals and R.sup.3 is tert.-alkyl or a cyclic radical with two substituents in the ortho-position to the carbonyl group. The recording compositions have a high reactivity when irradiated with UV light and are used in particular for the preparation of printing plates, relief plates and photo-resists.