Chlorine-free waterborne adhesion promoter for polyolefinic substrates

摘要

A zero VOC aqueous coating composition comprising a halogen-free propylene/ alpha -olefin copolymer having an alpha , beta -unsaturated dicarboxylic acid or anhydride grafted thereon, a base, and a water-dispersible resin containing at least two epoxy groups is applied to a plastics substrate comprising a propylene polymer. The dried coating promotes adhesion of a subsequent coating to the surface of the article, which is preferably of polypropylene or a thermoplastic olefin.