US 9,809,731 B2
Adhesive resin composition
Kahoru Niimi, Nagahama (JP); Makoto Inenaga, Nagahama (JP); Junichi Nakamura, Toyohashi (JP); and Eri Kawai, Toyohashi (JP)
Assigned to Mitsubishi Chemical Corporation, Chiyoda-ku (JP)
Appl. No. 15/38,649
Filed by MITSUBISHI PLASTICS, INC., Chiyoda-ku (JP)
PCT Filed Nov. 25, 2014, PCT No. PCT/JP2014/081092
§ 371(c)(1), (2) Date May 23, 2016,
PCT Pub. No. WO2015/080097, PCT Pub. Date Jun. 4, 2015.
Claims priority of application No. 2013-247041 (JP), filed on Nov. 29, 2013.
Prior Publication US 2016/0298007 A1, Oct. 13, 2016
Int. Cl. C09J 151/00 (2006.01); C09J 7/00 (2006.01); C09J 11/06 (2006.01); C08F 290/04 (2006.01); C09J 4/06 (2006.01); C09J 155/00 (2006.01)
CPC C09J 151/003 (2013.01) [C08F 290/046 (2013.01); C09J 4/06 (2013.01); C09J 7/00 (2013.01); C09J 11/06 (2013.01); C09J 151/00 (2013.01); C09J 155/005 (2013.01)] 20 Claims
 
1. A pressure-sensitive adhesive resin composition, comprising:
(A) 100 parts by mass of an acrylic copolymer (A);
(B) 0.5 to 20 parts by mass of a crosslinking agent (B); and
(C) 0.1 to 5 parts by mass of a photopolymerization initiator (C),
wherein:
the acrylic copolymer (A) is a graft copolymer having a weight average molecular weight of 5.0×104 to 5.0×105;
the acrylic copolymer (A) comprises as a trunk component of the graft copolymer a repeating unit derived from a (meth)acrylate;
the acrylic copolymer (A) comprises as a branch component of the graft copolymer a repeating unit derived from a macromonomer having a number average molecular weight of 5.0×102 or more and less than 6.0×103; and
the acrylic copolymer (A) comprises the repeating unit derived from the macromonomer in the acrylic copolymer (A) in a proportion in a range of 0.1 to 3 mol %.