Laminates for the manufacture of flexographic printing plates using block copolymers

US4162919A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Richter · Karlstein, DE
• August Wigger · Waldsee, DE
• Gerhard Fahrbach
• Erhard Seiler · Ludwigshafen, DE
• Helmut Barzynski · Bad Dürkheim, DE

Key dates

• Filing date: Nov 16, 1977
• Grant date: Jul 31, 1979
• Expiry date: Nov 16, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/108
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Laminates for the manufacture of flexographic printing plates and containing (a) a layer consisting essentially of a photocrosslinkable mixture of a two-block copolymer of from 30 to 95% w/w of a diene hydrocarbon and from 5 to 70% w/w of a styrene monomer or a partially hydrogenated product thereof with a compatible monomer having at least one C--C double bond, said mixture containing a photo-initiator, (b) a non-photocrosslinkable elastomeric underlayer having a Shore A hardness of from 15 to 70 and (c) a non-photocrosslinkable stablizing layer preferably between layers (a) and (b).