Chlorine-free, zero voc, 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 neutralizing base, a water-dispersible resin containing at least two epoxy groups and an acid catalyst is applied to a plastic substrate comprising a propylene polymer. The dried coating promotes adhesion of a subsequent coating to the polypropylene-based surface of the article.