Crosslinkable fluorine-containing copolymers, and surface coatings based on these copolymers

US5194543A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Schlipf · Schorndorf, DE
• Gerhard Merten · L Atkinson Lane, DE

Key dates

• Filing date: Dec 12, 1991
• Grant date: Mar 16, 1993
• Expiry date: Dec 12, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31935
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A crosslinkable, fluorine-containing copolymer is described which comprises PA0 a) from 10 to 60 mol-% of copolymerized units of a vinyl ester of a highly branched carboxylic acid whose acyl radical has 9 carbon atoms and comprises isomers containing two quaternary carbon atoms to which from 0 to 80 mol-% of isomers containing one quaternary carbon atom together with at least one tertiary carbon atom in the acyl radical are admixed, PA0 b) from 20 to 50 mol-% of copolymerized units of a vinyl ester of a short-chain carboxylic acid, where from 50 to 100% of the copolymerized units of this vinyl ester b) are in the OH form obtained by hydrolysis, and PA0 c) copolymerized units of a perfluoroolefin of the formula EQU CF.sub.2 .dbd.CFR.sub.f PA0 in which R.sub.f is F or a perfluoroalkyl radical having 1 to 8 carbon atoms, in an amount which makes the sum of components a)+b)+c) up to 100 mol-%, but with the proviso that at least 10 mol-% of the perfluoroolefin are present in the copolymer. The copolymers are suitable as binders for surface coating compositions of all types, in particular for industrial finishes.