Patent ID: 6010778
Filing Date: 2000-01-04
Classification: C08J,C08K,C09D,Y10T

Abstract:
A lens comprising:a plastic substrate obtained by polymerizing a monomer mixture containing at least a polyisocyanate and at least a polyol and/or at least a polythiol; anda cured film, of which thickness ranges from 0.3 .mu.m to 30 .mu.m, formed on said plastic substrate by coating and curing a coating composition containing(a) an organic silicon compound represented by a general formula:R.sup.1.sub.a R.sup.2.sub.b Si(OR.sup.3).sub.4-(a+b)wherein:R.sup.1 stands for an epoxy functional organic radical;R.sup.2 stands for a hydrocarbon or halogenated hydrocarbon radical with 1 to 6 carbon atoms;R.sup.3 stands for an alkyl, alkoxyalkyl or acyl radical with 1 to 4 carbon atoms;a=1, b=0 or 1, and a+b is 1 or 2; and(b) modified sol of a double structure in which nuclei composed of tin oxide colloid particles are surrounded by tin oxide-tungsten oxide complex colloid particles,wherein per 100 parts by weight (solid) of component (a), the amount of component (b) is 100 to 200 parts by weight.