Patent ID: 7510769
Filing Date: 2009-03-31
Classification: C08J,C09D,Y10T

Abstract:
1. A laminate film comprising: a guard film layer (A); and a clear layer (B) formed on the guard film layer (A), the clear layer (B) being made of a clear coating material comprising an acrylic-based polymer (B1), an urethane-based oligomer (B2), and a polymerization initiator (B3), the acrylic-based polymer (B1) being obtained by reacting. (i) an epoxy-group-containing copolymer containing an acrylic resin structure with (ii) a long-chain unsaturated carboxylic acid having a molecular weight of 150 or more and (iii) a short-chain unsaturated carboxylic acid having a molecular weight of less than 150, the epoxy-group-containing copolymer obtained by copolymerization of (a) an epoxy-group-containing unsaturated compound whose molecule has both one epoxy group and a polymerizable unsaturated bond, and (b) an unsaturated compound whose molecule has a polymerizable unsaturated bond, the acrylic-based polymer (B1) having at least one longer unsaturated double bond group and at least one shorter unsaturated double bond group as side chains, and having a weight-average molecular weight not less than 50,000 but not more than 500,000, the longer unsaturated double bond group introduced in the acrylic-based polymer (B1) by the long-chain unsaturated carboxylic acid having a molecular weight of 150 or more, and the shorter unsaturated double bond group introduced in the acrylic-based polymer (B1) by the short-chain unsaturated carboxylic acid having a molecular weight of less than 150, acrylic-based polymer (B1) content being not less than 30 parts by mass but not more than 70 parts by mass, based on 100 parts by mass of a total (B1+B2) of solid contents by weight of the acrylic-based polymer (B1) and the urethane-based oligomer (B2), and urethane-based oligomer (B2) content being not less than 30 parts by mass but not more than 70 parts by mass, based on 100 parts by mass of the total (B1+B2).