Photosensitive compositions and lithographic printing plates containing acid-substituted ternary acetal polymers

US5219699A · kind A · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• John E. Walls · Fort Collins, US
• Larry D. LeBoeuf · Fort Collins, US

Key dates

• Filing date: Jul 30, 1991
• Grant date: Jun 15, 1993
• Expiry date: Jul 30, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/11
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Photosensitive compositions, useful in lithographic printing plates which can be developed with aqueous developing solutions, comprise a diazo resin and an acid-substituted ternary acetal polymer which functions as a polymeric binder. The acid-substituted ternary acetal polymers are comprised of recurring units which include three six-membered cyclic acetal groups, one of which is unsubstituted or substituted with an alkyl or hydroxyalkyl group, another of which is substituted with an aromatic or heterocyclic moiety, and a third of which is substituted with an acid group, an acid-substituted alkyl group or an acid-substituted aryl group.