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US 11,884,813 B2Granted
Macromonomer copolymer, epoxy resin composition, adhesive, molding material, and cured product
AssigneeMitsubishi Chemical Corporation
InventorsEri Masuda, Junichi Nakamura, Kazuyoshi Odaka, Sora Tomita, Go Otani
Life of this patent
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Abstract
There is provided 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) has a constituent unit derived from a macromonomer (a) and a constituent unit derived from a vinyl monomer (b), and wherein a glass transition temperature (TgB) of a polymer obtained by polymerizing only the vinyl monomer (b) is 25° C. or less.
Claims18
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).
6 more elements
A macromonomer copolymer, comprising, in polymerized form, relative to total macromonomer copolymer weight, of:
- a macromonomer (a′) comprising a repeating unit of formula (1′)
- R being a group comprising a cyclic ether group, and X being H or a methyl group;
- and at least 50 wt. % of
- a vinyl monomer (b′) capable of being copolymerized with the macromonomer (a′), comprising a C4 to C20 (meth)acrylate (b-1),
- wherein the macromonomer (a′) comprises from 25 to 75% by mass of the repeating unit of formula (1′) and at least 20 wt. % of an alkyl (meth)acrylate, with respect to a total polymerized macromonomer (a) mass,
- wherein a glass transition temperature (Tgb″) of a polymer obtained by polymerizing only the vinyl monomer (b′) is 25° C. or less,
- wherein the macromonomer (a′) comprises, in polymerized form, 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 macromonomer copolymer is a graft copolymer derived from the macromonomer (a′) and the vinyl monomer (b′).
5 more elements
Dependencies are inferred from the claim text.