Modified epoxy resin composition

Claim 2

A modified epoxy resin composition, which comprises an epoxy resin and a modified adduct [D] of a conjugated diene polymer or copolymer which has an imido bond and/or amido bond and a semi-ester structure and has an acid value owing to a free carboxyl group of 5 to 100, said modified adduct being obtained by reacting an adduct [A] of a polymer of a conjugated diene having a number average molecular weight of 300 to 20,000 or a copolymer of the conjugated diene and vinyl monomer with an α,β-unsaturated dicarboxylic acid or its anhydride, with a compound [B] of the formula: ##STR3## wherein R 1 and R 2 are the same or different and are each hydrogen, an alkyl having 1 to 5 carbon atoms, a halogen, cyano, hydroxy, thiol, methoxy, --CONH 2 , --COCH 3 , --COOCH 3 , or --N(CH 3 ) 2 , and n is an integer of 0 to 3, and a compound [C] of the formula: R.sub.3 -CH.sub.2).sub.m OH [II] wherein R 3 is a saturated or unsaturated hydrocarbon group having 1 to 18 carbon atoms; a saturated or unsaturated hydrocarbon having 1 to 12 carbon atoms and containing cyano, a halogen, an ether bond, an ester bond or a hydroxy group which bonds to a secondary or tertiary carbon; a saturated alcohol residue having 1 to 8 carbon atoms; acrylic acid residue; and m is an integer of from 0 to 3.

Claim 3

A modified epoxy resin composition according to claim 1, wherein the conjugated diene monomer is a member selected from the group consisting of butadiene, isoprene, chloroprene, and 1,3-pentadiene, and the vinyl monomer is a member selected from the group consisting of an acrylic acid ester, a methacrylic acid ester, acrylonitrile, styrene, acetylene, ethylene, and propylene.

Claim 4

A modified epoxy resin composition according to claim 1, wherein the α,β-unsaturated dicarboxylic acid is a member selected from the group consisting of maleic anhydride, maleic acid, fumaric acid, itaconic acid, and citraconic acid.

Claim 5

A modified epoxy resin composition according to claim 1, wherein the epoxy resin contains at least one epoxy group.

Claim 6

A modified epoxy resin composition according to claim 1, wherein the modified adduct [D] is used in an amount of 5 to 300 parts by weight to 100 parts by weight of the epoxy resin.

Claim 7

A process for producing a modified epoxy resin composition which comprises reacting or mixing an epoxy resin with at least one modified adduct [D] of a conjugated diene polymer or copolymer which has an imido bond and/or amido bond and a semi-ester structure has and an acid value owing to a free carboxyl group of 5 to 100, said modified adduct being obtained by reacting an adduct [A] of a polymer of a conjugated diene having a number average molecular weight of 300 to 20,000 or a copolymer of the conjugated diene and a vinyl monomer with an α,β-unsaturated dicarboxylic acid or its anhydride, with a compound [B] of the formula: ##STR4## wherein R 1 and R 2 are the same or different and are each hydrogen, an alkyl having 1 to 5 carbon atoms, a halogen, cyano, hydroxy, thiol, methoxy, --CONH 2 , --COCH 3 , --COOCH 3 , or --N(CH 3 ) 2 , and n is an integer of 0 to 3, and a compound [C] of the formula: R.sub.3 -CH.sub.2).sub.m OH [II] wherein R 3 is a saturated or unsaturated hydrocarbon group having 1 to 18 carbon atoms; a saturated or unsaturated hydrocarbon having 1 to 12 carbon atoms and containing cyano, a halogen, an ether bond, an ester bond or a hydroxy group which bonds to a secondary or tertiary carbon; a saturated alcohol residue having 1 to 8 carbon atoms; acrylic acid residue; and m is an integer of from 0 to 3.

Claim 8

A process for producing a modified epoxy resin composition which comprises reacting or mixing an epoxy resin with at least one modified adduct [D] of a conjugated diene polymer or copolymer which has an imido bond and/or amido bond and a semi-ester structure has and an acid value owing to a free carboxyl group of 5 to 100, said modified adduct being obtained by reacting an adduct [A] of a polymer of a conjugated diene having a number average molecular weight of 300 to 20,000 or a copolymer of the conjugated diene and a vinyl monomer with an α,β-unsaturated dicarboxylic acid or its anhydride, with a compound [B] of the formula: ##STR4## wherein R 1 and R 2 are the same or different and are each hydrogen, an alkyl having 1 to 5 carbon atoms, a halogen, cyano, hydroxy, thiol, methoxy, --CONH 2 , --COCH 3 , --COOCH 3 , or --N(CH 3 ) 2 , and n is an integer of 0 to 3, and a compound [C] of the formula: R.sub.3 -CH.sub.2).sub.m OH [II] wherein R 3 is a saturated or unsaturated hydrocarbon group having 1 to 18 carbon atoms; a saturated or unsaturated hydrocarbon having 1 to 12 carbon atoms and containing cyano, a halogen, an ether bond, an ester bond or a hydroxy group which bonds to a secondary or tertiary carbon; a saturated alcohol residue having 1 to 8 carbon atoms; acrylic acid residue; and m is an integer of from 0 to 3.