Phosphonic acid cross-linked hydrophilic copolymers

US4585845A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Friedrich Engelhardt · Frankfurt, DE
• Klaus Kuhlein · Kelkheim, DE
• Juliane Balzer · Frankfurt am Main, DE
• Walter Dursch · Königstein, DE
• Hans-Jerg Kleiner · Kronberg, DE

Key dates

• Filing date: Apr 9, 1984
• Grant date: Apr 29, 1986
• Expiry date: Apr 9, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F246/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Crosslinked copolymers wherein crosslinking is effected with crosslinking bridge members of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are each hydrogen or alkyl with 1 to 4 carbon atoms and m represents a number from 0 to 6 are prepared by copolymerization of monomers with vinylphosphonic acid (ester)-anhydrides and the new crosslinked polymers according to the invention are suitable for the preparation of acid-soluble coatings and encapsulation materials.