Transparent resin substrate

摘要

The transparent resin substrate has a light-transmitting thermoplastic resin underlying sheet 1 and a hard coating formed on one surface of the underlying sheet, wherein the hard coating includes a resin component obtained by curing an urethane acrylate that contains a tri-functional or less functional urethane acrylate and a tetra-functional or more functional urethane acrylate; a silane coupling agent or a hydrolyzed product thereof, a silica sol having a grain size of 5 to 500 nm and a refractive index in a range of 1.44 to 1.5; and a metal chelate compound. A low refractive index layer is formed on the hard coating, the low refractive index layer includes a low refractive index hollow silica sol having a grain size of 10 to 150 nm and a refractive index of not more than 1.44, the silane coupling agent or the hydrolyzed product thereof, and a metal chelate compound.

主权项

1. A transparent resin substrate having a light-transmitting thermoplastic resin underlying sheet and a hard coating formed on one surface of the underlying sheet, wherein,
said hard coating comprises:
100 parts by weight of a resin component (A) obtained by curing an urethane acrylate that contains a tri-functional or less functional urethane acrylate (A1) and a tetra-functional or more functional urethane acrylate (A2); 1 to 30 parts by weight of a compound (B) represented by the following general formula (1),
Rn—Si(OR1)4-n  (1)wherein R is an alkyl group or an alkenyl group, R1 is an alkyl group, an alkoxyalkyl group, an acyloxy group or a halogen atom, and n is a number of 1 or 2, or a hydrolyzed product thereof;1 to 50 parts by weight of a silica sol (C) having a grain size of 5 to 500 nm and a refractive index in a range of 1.44 to 1.5; and0.1 to 3 parts by weight of a metal chelate compound (D); and wherein,a low refractive index layer is formed on said hard coating, said low refractive index layer comprising a low refractive index hollow silica sol (a) having a grain size of 10 to 150 nm and a refractive index of not more than 1.44, the compound (b) represented by the above general formula (1) or a hydrolyzed product thereof, and a metal chelate compound (c);said low refractive index layer containing said hollow silica sol (a) in an amount of 10 to 50% by weight, and containing said compound (b) or the hydrolyzed product thereof and said metal chelate compound (c) at a weight ratio (b/c) of 60/40 to 99/1.