Hydrophilic copolymers and their use in reprography

US5178963A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Raimund J. Faust · Wiesbaden, DE
• Silvia Lutz · Mainz, DE
• Engelbert Pliefke · Wiesbaden, DE

Key dates

• Filing date: Jul 17, 1991
• Grant date: Jan 12, 1993
• Expiry date: Jul 17, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31699
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a hydrophilic copolymer having the general structure: ##STR1## in which R.sup.1 denotes H, CH.sub.3 or C.sub.2 H.sub.5, PA1 R.sup.2 denotes an alkyl or cycloalkyl radical having 1 to 17 carbon atoms, PA1 R.sup.3 denotes CH.sub.3, C.sub.2 H.sub.5 or C.sub.3 H.sub.7, PA1 m is 2, 3 or 4 and PA1 n, o, p denote the fractions of the monomer units having acidic side groups, neutral, non-ionizable monomer units and monomer units having basic side groups respectively, in mol %, with n+o+p=100 mol %, with the proviso that n and p are each .gtoreq.2 mol %, PA1 wherein the copolymer is a linear copolymer having a random structure of monomer units. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates.