Patent ID: 6514574
Filing Date: 2003-02-04
Classification: C08J,C09D,Y10T

Abstract:
A process for making an abrasion-resistant coating onto at least one surface of a substrate made of an organic glass which comprises:(a) preparing a polymerizable composition containing a component A comprising at least one silane compound containing at least one epoxy group and at least two alkoxy groups directly bonded to the Si atom of the molecule or a hydrolysate thereof and a component B comprising fine particles of silica, an effective amount of at least one cationic photopolymerization initiator and an effective amount of at least one thermal polymerization catalyst; (b) coating at least one surface of the substrate with the composition resulting from step (a); (c) submitting the coated substrate to a photopolymerization step for pre-curing the coating layer; and thereafter; (d) submitting the substrate with the pre-cured coating layer thereon to a thermal curing at a predetermined temperature and for a predetermined time to complete curing of the coating layer.