Laminates for the manufacture of flexographic printing plates comprising photocrosslinkable reaction product of saturated polyester glycol, diisocyanate, and diol

US3948665A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Richter · Karlstein, DE
• Herbert Stutz · Karlsruhe, DE
• Lothar Metzinger · Osnabrück, DE
• Otto Volkert · Bad Dürkheim, DE
• Heinz-Ulrich Werther · Monsheim, DE
• August Wigger · Waldsee, DE

Key dates

• Filing date: Jan 2, 1974
• Grant date: Apr 6, 1976
• Expiry date: Jan 2, 1994

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/11
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Laminates for the production of relief plates for flexographic printing, by imagewise exposure and washing out with a developer solution have, on a base optionally provided with an elastomeric layer, a photo-crosslinkable layer containing a photoinitiator and consisting of a polyurethane elastomer which has been prepared in a special manner from an aliphatic saturated polyesterglycol, an aliphatic diisocyanate, but-1-ene-3,4-diol and, if desired, another diol and which has a Shore A hardness of 30 to 90.degree. in the photo-crosslinked state, the elastomer being optionally mixed with a photo-crosslinked monomer.