POLYMERIC STABILIZER, STABLE DISPERSIONS PREPARED THEREFROM AND PAINT COMPOSITIONS COMPRISING SUCH DISPERSIONS

摘要

A stabilizer capable of forming a stable dispersion in an organic liquid includes a copolymer bearing pendent ethylenic unsaturation which comprises the reaction product of ethylenically unsaturated monomers (A) and copolymer reactant (B), said ethylenically unsaturated monomers (A) bearing functionality capable of condensation reaction with complementary functionality of said copolymer reactant (B) which comprises a random copolymer of (i) from about 20 to about 45 weight percent of ethylenically unsaturated monomers, homopolymers of which would be substantially insoluble in a selected organic liquid; (ii) from about 40 to about 75 weight percent of ethylenically unsaturated monomers, homopolymers of which would be substantially soluble in said organic liquid; and (iii) from about 2 to about 15 weight percent of ethylenically unsaturated monomers bearing said complementary functionality capable of condensation reaction with said ethylenically unsaturated monomers (A), said ethylenically unsaturated monomers (A) being reacted with said copolymer reactant (B) in an amount sufficient to react with at least about 10 percent of said complementary functionality of said copolymer reactant (B). The stable dispersions may be incorporated in coating compositions comprising (I) an hydroxy film-forming component, (II) a crosslinking agent bearing functionality capable of reacting with the hydroxy groups of the film-forming component, and (III) a flow control additive of which the dispersion forms part.