PRETREATMENT OF POLYOLEFIN SURFACES FOR PAINTING

摘要

Surfaces of articles made of a polyethylene polypropylene, crystalline dipolymers of ethylene with propylene, blends of two or more of the above, and blends of any of the above with elastomeric ethylene/ propylene copolymers or with EPDM copolymers are primed for painting by coating with chlorinated polypropylene and exposing to ultraviolet radiation. This treatment improves both dry and wet adhesion of paint to surfaces of articles made of single polyolefins as well as of their blends with elastomeric copolymers in which the latter constitute at most 50% of the total polymer.