WATER BORNE ALKYD EMULSIONS FOR SURFACE PRIMER COMPOSITIONS FOR ARCHITECTURAL INTERIOR FINISHES

摘要

Aqueous alkyd emulsions are provided suitable for preparing water borne primer paint compositions for variety of porous and nonporous substrates and a process thereof consisting of i) preparation of high solid alkyd by reacting vegetable Oil fatty acids, aromatic carboxylic acid, aromatic dicarboxylic acid and polyol, and ii) preparation of aqueous emulsion of said high solid alkyd resin using suitable emulsifying agent (nonionic and anionic surfactant) through emulsion inversion process (EIP). The aqueous primer paint compositions comprising of alkyd emulsions, inorganic pigments, extenders, additives and driers are suitable for highly porous and chalky Plaster of Paris and cementitious surfaces which are quite difficult to coat with. Such water borne primer compositions provided an adherent coating having excellent adhesion/ inter coat adhesion with the substrate as well as between layers of primer and top coats.