Patent ID: 6809889
Filing Date: 2004-10-26
Classification: C08F,G02B,Y10T

Abstract:
A radiation curable resin composition for a Fresnel lens comprising, an epoxy (meth)acrylate (a) having two or more (meth)acryloyl groups obtained by reacting an epoxy resin having a cyclic structure and an epoxy equivalent per weight of 450 g/eq or more with (meth)acrylic acid; a trifunctional (meth)acrylate (b) represented by general formula (1); a (meth)acrylate (c) which is a (meth)acrylate of an aliphatic polyhydric alcohol having an oxypropylene structure and two or more hydroxyl groups and has a molecular weight of 700 or less; and a monofunctional (meth)acrylate (d) having a cyclic structure; said general formula 1: wherein R1 represents a hydrocarbon group having 1 to 5 carbon atoms and R2 represents hydrogen or a methyl group.