MULTI-COMPONENT COATING COMPOSITION COMPRISING AN ANHYDRIDE CONTAINING POLYMER, A GLYCIDYL COMPONENT AND A PHOSPHONIUM CATALYST

摘要

A coating composition useful for a finish forautomobiles and trucks in which the film forming bindercontains reactive binder components of about(a) 25-90% by weight, based on the weight of thebinder, of an acrylic polymer having at leasttwo reactive anhydride groups composed ofpolymerized monomers of an ethylenicallyunsaturated anhydride and polymerizedmonomers from the group consisting of alkylmethacrylate, alkyl acrylate and any mixturesthereof, wherein the alkyl groups have 1-8carbon atoms and the polymer has a weightaverage molecular weight of about2,000-50,000;(b) 5-50% by weight, based on the weight of thebinder, of a glycidyl component having atleast two reactive glycidyl groups; and(c) 0.1-7% by weight, based on the weight of thebinder, of a phosphonium catalyst or a blendof a phosphonium catalyst and a tertiaryamine catalyst which may or may not containhydroxyl groups.