Patent ID: 11884813
Assignee: MITSUBISHI CHEMICAL CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
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).