Surfactant-free emulsions for waterborne, two-component polyurethane coatings

Catalytic chain transfer polymerisation based on cobalt II or III chelates is a free radical technique which allows the synthesis of functional oligomers with a terminal alpha-substituted acrylate group. This paper will review the applications of such oligomers in the design of low molecular weight, graft and block copolymer emulsions and dispersions for waterborne, two-component polyurethane paints. Such emulsions and dispersions have a composition and molecular weight control and offer unique properties when compared with binders prepared via conventional techniques. (C) 2000 Elsevier Science S.A. All rights reserved.