Patent ID: 6703131
Filing Date: 2004-03-09
Classification: C08J,C09D,G02B,Y10T

Abstract:
A plastic lens comprising a plastic lens substrate having a refractive index of 1.50 or more and a hard coat layer which is formed on the surface of the substrate directly or through a primer layer, the hard coat layer comprising:(1) 2 to 70 wt % of titanium oxide or a composite oxide thereof having a particle diameter of 1.0 to 100 nm, the titanium oxide containing at least one titanium oxide selected from the group consisting of rutile type titanium oxide and anatase type titanium oxide in an amount of 50 wt % or more; (2) 1 to 10 wt % of a chelate compound or fatty acid salt containing Co(II); (3) 20 to 97.9 wt % of a silicon resin, and (4) 0.001 to 10 wt % of a curing catalyst selected from the group consisting of alkali metal salts and ammonium salts of carboxylic acids, metal salts and ammonium salts of acetylacetone, metal salts of ethyl acetoacetate; metal salts coordinated with acetylacetone and ethyl acetoacetate, metal salt hydrates of ethylene diamine, primary to tertiary amines, polyalkylene amines, sulfonates, magnesium perchlorate, ammonium perchlorates, and combinations of these compounds and organic mercaptan or mercaptoalkylenesilane, but being different from said chelate compound or fatty acid salt containing Co(II), and having a refractive index of 1.48 or more and a thickness of 0.5 to 5 &mgr;m, the weight percentages of the above components (1), (2) and (3) being based on 100 wt % of the total weight of the components (1), (2) and (3), and the weight percentage of the above component (4) being based on the total weight of the above components (1), (2) and (3).