Coating materials containing a reaction product of an epoxy novolak resin and an olefinically unsaturated carboxylic acid crosslinkable by radiation

US5436279A · kind A · utility

Assignees

• Rutgerswerke Aktiengesellschaft · DE
• Lackwere Peters GmbH & Co. KG · DE

Inventors

• Ulrich Grundke · Duisburg, DE
• Klaus-Peter Liebetanz · Duisburg, DE
• Achim Hansen · Zug, CH
• Jurgen Zehrfeld · Voerde, DE
• Rainer Scharre · Kempen, DE
• Werner Peters

Key dates

• Filing date: Feb 1, 1994
• Grant date: Jul 25, 1995
• Expiry date: Feb 1, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05K3/287
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A coating material crosslinkable by radiation comprising a) an olefinic unsaturated ester of an epoxy novolac resin, b) a binder formed by reaction of an epoxy compound having more than one epoxide group per molecule with at least one carboxylic acid in a molar ratio of epoxy groups per carboxyl group of 1:0.5 to 0.9 and subsequent reaction of the resulting reaction product with at least one unsaturated isocyanate ester formed by reaction of a compound with at least two isocyanate groups with a member of the group consisting of hydroxyl containing acrylic acid, methacrylic acid and cyanacrylic acid esters, c) at least one latent hardener, d) at least one photoinitiator e) 80-120% by weight of fillers and (f) additives, adjuvants and solvents and protective films formed with them.