Multi-layer elements suitable for the production of printing plates and relief plates

US4459348A · kind A · utility

Assignee

• BASF SE

Inventors

• Mong-Jon Jun · Speyer, DE
• Peter Richter · Karlstein, DE
• Helmut Barzynski · Bad Dürkheim, DE

Key dates

• Filing date: May 27, 1983
• Grant date: Jul 10, 1984
• Expiry date: May 27, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/106
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A multi-layer element for the production of printing plates and relief plates which is based on an elastomeric polymer binder and is firmly anchored to a polyester base by means of an adhesive layer. The adhesive layer consists of a thermally hardened mixture which is insoluble in aromatic hydrocarbon solvents or aliphatic halohydrocarbon solvents and contains (c1) from 90 to 40% by weight, based on the sum of (c1) and (c2), of an hydroxyl-containing polyurethane, hydroxyl-containing epoxy, hydroxyl-containing phenoxy resin, polyester-ol or polyether-ol resin which has been hardened and crosslinked with isocyanate, and which has from about 4 to 20% by weight, based on the non-crosslinked and hardenable resin, of free OH groups before hardening and crosslinking with isocyanate, and (c2) from 10 to 60% by weight, based on the sum of (c1) and (c2), of an OH-free polycarbonate which is compatible with the resin (c1) before the latter is hardened and crosslinked.