Polymers In Surface Coating

Abstract

A new process was developed for synthesis of alkyd resins in which a conventional monoglyceride is reacted with a carboxy-functional acrylic copolymer. The novel products are called acrylated alkyd resins. The carboxy-functional acrylic copolymers were synthesized by solution-free radical polymerization. Three of acrylic copolymers were prepared from various combinations of acrylic monomers and reacted with a monoglyceride prepared from castor oil. The results revealed that acid functional acrylic copolymers containing phthalic acid and  maleic anhydride as a functional co-monomer can successfully be used to modify alkyd resins yielding acrylated resins with better drying, solubility and chemical resistance properties. However there exist optimum levels for modification of alkyds with such copolymers beyond which certain film properties are adversely affected. The results revealed that acid functional acrylic copolymers containing phthalic acid and maleic anhydride as a functional co-monomer can successfully be used to modify alkyd resins yielding acrylated resins with better drying, and chemical resistance properties. Thermal analysis of Acrylated alkyd resins by Thermo Gravimetric Analysis (TGA) and thermal differential calorimeter (DSC) techniques. Reveals that these aromatic Acrylated alkyd resins possess thermal stability. Acrylated alkyd resins were characterized by (FTIR and ¹HNMR) spectroscopies. However there exist optimum levels for modification of alkyds with such copolymers beyond which certain film properties are adversely affected.