Thermally crosslinkable hydrophilic copolymers and their use in reprography

US5178961A · 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 thermally crosslinkable hydrophilic copolymer have the general structure: EQU . . . --(A).sub.m --. . . --(B).sub.n --. . . --(C).sub.o --. . . --(D).sub.p --. . . in which PA1 A is at least one polymerizable monomer having an acidic side group, PA1 B is at least one polymerizable monomer having a basic side group, PA1 C is at least one polymerizable monomer having a non-polar, non-hydrophilic side group, and PA1 D is N-butoxymethylmethacrylamide, PA1 m, n, o and p are the monomer contents of monomers A, B, C and D, respectively, in mol %, with m+n +o+p=100 mol %, with the proviso that the sum of m+n=about 5 to 90 mol %, m and n are each .gtoreq.2 mol % and p is .gtoreq.1 mol %, wherein the copolymer is a linear copolymer having a random structure of the monomers. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates.