CROSSLINKABLE, FLUORINE-CONTAINING COPOLYMERS, AND SURFACE COATINGS BASED ON THESE COPOLYMERS

摘要

HOE 90/F 918 of the disclosure Crosslinkable, fluorine-containing copolymers, and surface coatings based on these copolymers A crosslinkable, fluorine-containing copolymer is described which comprises 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, 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 c) copolymerized units of a perfluoroolefin of the formula CF2=CFRf in which Rf 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.