US 11,884,813 B2
Macromonomer copolymer, epoxy resin composition, adhesive, molding material, and cured product
Eri Masuda, Tokyo (JP); Junichi Nakamura, Tokyo (JP); Kazuyoshi Odaka, Tokyo (JP); Sora Tomita, Tokyo (JP); and Go Otani, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Chiyoda-ku (JP)
Filed by Mitsubishi Chemical Corporation, Chiyoda-ku (JP)
Filed on Mar. 2, 2020, as Appl. No. 16/805,894.
Application 16/805,894 is a continuation of application No. PCT/JP2018/033099, filed on Sep. 6, 2018.
Claims priority of application No. 2017-170771 (JP), filed on Sep. 6, 2017; application No. 2018-116280 (JP), filed on Jun. 19, 2018; and application No. 2018-129045 (JP), filed on Jul. 6, 2018.
Prior Publication US 2020/0199352 A1, Jun. 25, 2020
Int. Cl. C08L 63/00 (2006.01); C08F 220/06 (2006.01); C08G 59/42 (2006.01); C08G 59/50 (2006.01); C08G 59/62 (2006.01); C08L 33/10 (2006.01); C08F 290/04 (2006.01); C08G 59/68 (2006.01); C08L 55/00 (2006.01); C08G 59/40 (2006.01); C09J 133/00 (2006.01); C09J 155/00 (2006.01); C08F 283/10 (2006.01); C08L 33/06 (2006.01); C08L 33/04 (2006.01); C09J 163/00 (2006.01)
CPC C08L 63/00 (2013.01) [C08F 220/06 (2013.01); C08G 59/42 (2013.01); C08G 59/50 (2013.01); C08G 59/621 (2013.01); C08L 33/10 (2013.01); C09J 163/00 (2013.01)] 18 Claims
 
1. An epoxy resin composition, comprising:
a (meth)acrylic copolymer (A);
an epoxy resin (B); and
a curing agent (C),
wherein the (meth)acrylic copolymer (A) comprises, in polymerized form relative to total (meth)acrylic copolymer (A) weight, a macromonomer (a) and at least 50 wt. % of a vinyl monomer (b) comprising a C4 to C20 (meth)acrylate (b-1),
wherein the macromonomer (a) comprises, in polymerized form relative to total macromonomer (a) weight, 25 to 75 wt. % of a monomer comprising a cyclic ether group and at least 20 wt. % of an alkyl (meth)acrylate,
wherein a glass transition temperature (TgB) of a polymer obtained by polymerizing only the vinyl monomer (b) is 25° C. or less,
wherein the monomer comprising the cyclic ether group comprises glycidyl (meth)acrylate, (3,4-epoxycyclohexyl) methyl (meth)acrylate, β-methylglycidyl (meth)acrylate, (3-ethyloxetane-3-yl)methyl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, (2-methyl-2-ethyl-1,3-dioxolane-4-yl) (meth)acrylate, and/or (5-ethyl-1,3-dioxane-5-yl)methyl (meth)acrylate, and
wherein the (meth)acrylic copolymer (A) is a graft copolymer derived from the macromonomer (a) and the vinyl monomer (b).