Radiation-sensitive recording material for the production of planographic printing plates

US5998084A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Andreas Elsaesser · Idstein, DE
• Raimund Haas · Frankfurt am Main, DE
• Guenter Hultzsch · Wiesbaden, DE
• Peter Lehmann · Oebisfelde, DE
• Rudolf Neubauer · Erbach, DE
• Rudolf Zertani · Mainz, DE

Key dates

• Filing date: Nov 15, 1996
• Grant date: Dec 7, 1999
• Expiry date: Nov 15, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/0226
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A positive-working, radiation-sensitive recording material capable of being used for the production of planographic printing plates, comprising: an aluminum support and a radiation-sensitive layer coated thereon, wherein PA1 the aluminum support has been grained in nitric acid, then cleaned in sulfuric acid, anodized in sulfuric acid, and subsequently hydrophilized with a compound comprising at least one unit with a phosphonic acid or phosphonate group; and PA1 the radiation-sensitive layer comprises PA2 a) a radiation-sensitive 1,2-naphthoquinone-2-diazide-4- or -5-sulfonic acid ester of a polycondensate having phenolic hydroxy groups, said polycondensate being obtained by reacting a phenolic compound with an aldehyde or ketone, PA2 b) a novolak or a polycondensation product obtained by reacting a polyphenol with an aldehyde or ketone, as an alkali-soluble resin, PA2 c) a vinyl-type polymer comprising at least one unit having a lateral hydroxyphenyl group, PA2 d) a clathrate-forming compound, PA2 e) a low-molecular weight compound which comprises at least one acidic hydrogen atom, and PA2 f) silica gel particles having a maximum diameter of 15 .mu.m.