Photocurable elastomeric mixture and recording material obtained therefrom for the production of relief printing plates

US6017678A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Willi-Kurt Gries · Mainz, DE
• Raimund J. Faust · Wiesbaden, DE

Key dates

• Filing date: Apr 25, 1995
• Grant date: Jan 25, 2000
• Expiry date: Apr 25, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/111
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a photocurable, negative-working mixture and a recording material which is obtained therefrom and which is suitable for the production of elastic relief printing plates. The mixture contains a) an amphiphilic elastomeric binder, b) a free-radical-polymerizable compound which is compatible with the binder and which has at least one terminal, ethylenically unsaturated group and a boiling point of over about 100.degree. C. at normal pressure and c) a compound or a combination of compounds which is capable of initiating the polymerization of the compound b) on exposure to actinic light. The binder is made up of the segments A, B, C and X, where: PA1 A) is a hydrophobic soft block having a glass transition temperature T.sub.g of below about -30.degree. C.; PA1 B) is a hydrophilic hard block which contains basic groups and has a glass transition temperature T.sub.g of over about +10.degree. C.; PA1 C) is a hydrophobic hard block having a glass transition temperature T.sub.g of over about +50.degree. C.; and PA1 X) is a unit formed from a compound containing two or more vinyl or isopropenyl groups or a homopolymer block which is prepared from such compounds and is…