Hydroxyl-functional copolymers of low molar mass with substantial side-chain branching, process for their preparation, and their use

US5852122A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Ulrich Epple · Eschborn, DE
• Uwe Kubillus · Wiesbaden, DE
• Harald Oswald · Hofheim, DE

Key dates

• Filing date: May 2, 1996
• Grant date: Dec 22, 1998
• Expiry date: May 2, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31576
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Low molar mass copolymers which can be prepared by reacting one or more glycidyl esters of saturated aliphatic monocarboxylic acids having a tertiary or quaternary .alpha. carbon atom, and at least two unsaturated copolymerizable monomers of which at least one has at least one COOH group, under the conditions of a free-radical copolymerization, whereby the weight-average molar mass of the copolymers is below 3500 g/mol and the proportion of branched side chains in the copolymer is at least 20% by mass are disclosed. Also disclosed are methods of making these copolymers and the use thereof in binder and coating systems.