ACID FUNCTIONAL ACRYLIC COPOLYMER MODIFIED ALKYDS FOR APPLICATIONS INSURFACE-COATINGS - II

Acid-functional n-butylmethacrylate-co-maleic anhydride copolymers of varying composition have been synthesized by free radical initiated so lution polymerization technique and characterized. These copolymers ha ve been used, in varying proportions, to modify Rubberseed Oil (RSO)-b ased alkyd resins to obtain a series of acrylated alkyds. Various film properties of these: acrylated alkyds and their combination with buty lated melamine formaldehyde resin in different proportions have been s tudied. Composition of acrylic copolymers, the degree of modification and curing conditions with the properties exhibited by their films hav e been correlated. The acid-functional acrylic copolymer modified alky ds can be used as co-curing resins with melamine formaldehyde resins t o prepare baking type coating compositions. These resins show superior film properties and they can be used as binders for industrial mainte nance coatings.