| US 7,510,769 B2 | ||
| Laminate film | ||
| Takakazu Hase, Hirakata (Japan); Yoshihiko Saito, Hirakata (Japan); Koichi Takahashi, Hirakata (Japan); Yasushi Kojima, Ibaraki (Japan); Kenichi Shinya, Ibaraki (Japan); and Keishi Hamada, Ibaraki (Japan) | ||
| Assigned to Nippon Bee Chemical Co., Ltd., Osaka (Japan); Nippon Paint Co., Ltd., Osaka (Japan); and Hitachi Chemical Co., Ltd., Tokyo (Japan) | ||
| Filed on Mar. 09, 2005, as Appl. No. 11/74,702. | ||
| Claims priority of application No. 2004-067340 (JP), filed on Mar. 10, 2004. | ||
| Prior Publication US 2005/0202266 A1, Sep. 15, 2005 | ||
| Int. Cl. B32B 27/30 (2006.01); B32B 27/40 (2006.01) | ||
| U.S. Cl. 428—423.1 [428/423.3; 428/424.2; 428/500; 428/515] | 16 Claims |
| 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).
|