Photochromic coating composition and photochromic synthetic resin ophthalmic lens

A photochromic synthetic ophthalmic resin lens, comprising a synthetic resin lens body coated with a photochromic surface hard coat having a thickness between about 1 to 30.mu., the surface hard coat formed from at least one silane compound which has been hydrolyzed, the silane compound having the general formula (1) as follows:

• ##STR6## wherein R.sup.1 is an organic group containing at least one group selected from vinyl, amino, imino, epoxy, methacryloxy, glycidoxy, phenyl and SH group, R.sup.2 is hydrogen, a hydrocarbon group having from one to six carbon atoms or a vinyl group, R.sup.3 is a hydrocarbon group having from one to five carbon atoms, an alkoxyalkyl group having from one to five carbon atoms or an acyl group having from one to four carbon atoms, a is an integer 0, 1 or 2 and b is an integer 0 or 1 wherein the relation of a and b is a+b.ltoreq.2, at least one epoxy compound selected from the group consisting of mono-, di-, tri- and tetra-glycidyl ethers formed from polyhydric alcohols and unsaturated fatty acid compounds wherein the double bonds are at least partially epoxilated, at least one epoxy curing catalyst and a photochromic material dispersed therein, to provide a photochromic ophthalmic lens having improved abrasion resistance.

A photochromic synthetic resin ophthalmic lens, comprising a synthetic resin lens body coated with a photochromic surface hard coat having a thickness between about 1 and 30.mu., the surface hard coat formed from at least one organic silane compound which has been hydrolyzed, the silane compound having the general formula (1) as follows:

• ##STR8## wherein R.sup.1 is an organic group containing at least one group selected from vinyl, amino, imino, epoxy, methacryloxy, glycidoxy, phenyl and SH group, R.sup.2 is hydrogen, a hydrocarbon group having from one to six carbon atoms or a vinyl group, R.sup.3 is a hydrocarbon group having from one to five carbon atoms, an alkoxyalkyl group having from one to five carbon atoms or an acyl group having from one to four carbon atoms, a is an integer 0, 1 or 2 and b is an integer 0 or 1 wherein the relation of a and b is a+b.ltoreq.2, at least one epoxy compound selected from the group consisting of mono-, di, tri- and tetraglycidyl ethers formed from polyhydric alcohols, an epoxy curing catalyst and a photochromic material dispersed therein, to provide a photochromic opthalic lens having improved abrasion resistance.