Patent ID: 6110327
Filing Date: 2000-08-29
Classification: B32B,B64C,B64D,C08G,C08J,C09D

Abstract:
A method of adhering a coating selected from the group consisting of metal coatings, metal nitride coatings and electroconductive metal oxide coating to a plastic substrate comprising the steps of:a. providing a plastic substrate, wherein said substrate is selected from the group consisting of polycarbonate polyurethane, bis phenol-A polycarbonate, polyether carbonate and stretched acrylic;b. cleaning said substrate by wiping said substrate with hexane and methanol;c. directing a carbonate diol-based polyurethane primer composition onto the surface of a plastic substrate by a process selected from the group consisting of dipping, spraying, spinning or flowing said primer composition onto the surface of said plastic substrate;d. air drying said primer composition at room temperature until sufficient solvent has evaporated to render said primer composition tack free;e. curing said primer composition at a temperature of at least 230.degree. F. (110.degree. C. ) for approximately 1 to 2 hours whereupon crosslinking will occur to form a crosslinked primer on said substrate; andf. applying said coating over said primer, wherein said primer adheres said coating to said substrate.