WATERBORNE COMPOSITIONS CONTAINING COPOLYMERS OF ISOBUTYLENE

摘要

A curable, aqueous film-forming composition is provided, comprising: (a) a copolymer containing reactive functional groups and comprising at least 30 m ol % of residues having alternating structural units: -~DM-AM~-wherein DM represents a residue from a donor monomer, and AM represents a residue from an acceptor monomer, at least 15 mol % of the copolymer comprising a donor monomer having the structure (I): wherein R1 is linear or branched C1 to C 4 alkyl, R2 is selected from methyl, linear, cyclic or branched C1 to C20 alky l, alkenyl, aryl, alkaryl and aralkyl; and (b) a curing agent having functional groups reactive with the reactive functional groups of (a).The invention is also directed to a multi-component composite coating composition including a base coat deposited from a pigmented film-forming composition and a transparent topcoat applied over the base coat. At least one coat is the fil m- forming composition described above.