Use of carboxyl group-containing acetal polymers in light-sensitive compositions and lithographic printing plates

US6808858B2 · kind B2 · utility

Assignee

• Kodak Polychrome Graphics Company Ltd. · US

Inventors

• Robert Fuss · Kelheim, DE
• Harald Baumann · Tuttlingen, DE
• Udo Dwars · Herzberg, DE
• Hans-Joachim Timpe · Biberach an der Riß, DE

Key dates

• Filing date: Dec 10, 2002
• Grant date: Oct 26, 2004
• Expiry date: Dec 10, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/032
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The present invention relates to a light-sensitive composition containing: (i) at least one diazonium polycondensation product or at least one system that can be radically polymerized and consists of photoinitiators and unsaturated compounds which can be radically polymerized or at least one hybrid system consisting of a diazonium polycondensation product and a system that can be radically polymerized and consists of photo initiators and unsaturated compounds which can be radically polymerized, (ii) at least one binding agent and optionally one or more exposure indicators, one or more dyes for increasing the image contrast and one or more acids for stabilizing the light-sensitive composition which is characterized in that the binding agent essentially consists of units (A, B, C, D), whereby A corresponds to formula (I), B corresponds to formula (II), C corresponds to formula (III) and D corresponds to formula (IV). The invention also relates to the use thereof for coating printing plates. The invention further relates to printing plates which are coated with said light-sensitive composition.