Sumitomo Chemical Company, Limited

Tohto Kasei Co., Ltd.

Minoru Hino

Seimei Yasui

Takao Oshima

Michio Yamamoto

Kazuo Hayatsu

Akira Shintani

Kazuya Hayashi

Akihiro Tachibana

Kunio Izumi

Otsugu Hayashi

Modified epoxy resin compositions having excellent flexibility and excellent compatibility with conventional epoxy resins as well as exhibiting the original properties of the epoxy resin before being modified such as mechanical strength, adhesion, heat resistance are disclosed and chemical resistance, which are obtained by treating 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 and has an acid value owing to a free carboxyl group of 5 to 100. The modified adduct is 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 .alpha.,.beta.-unsaturated dicarboxylic acid or its anhydride, with a compound [B] containing one primary amino group in the molecule and a compound [C] containing a hydroxy group in the molecule.

Modified epoxy resin composition

Modified epoxy resin composition having excellent flexibility and excellent compatibility with conventional epoxy resins as well as the original properties of the epoxy resin before modified such as mechanical strength, adhesion, heat resistance and chemical resistance, which is obtained by treating 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 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 a vinyl monomer with an .alpha.,.beta.-unsaturated dicarboxylic acid or its anhydride, with a compound [B] of the formula: ##STR1## and a compound [C] of the formula:

A resin composition for electrocoating which comprises

Resin composition for electrocoating

A resin for coatings, particularly useful as a medium for printing inks and paints, comprising a modified polymer produced by adding at least one .alpha.,.beta.-unsaturated dicarboxylic acid or anhydride thereof to at least one liquid conjugated diolefinic polymer having a number average molecular weight of 150 to 3,000, a viscosity of 2 to 5,000 cps at 30.degree. C. and at least 50% of cis-1,4 structure and subjecting the resulting adduct to diesterification with at least one alcohol having 1 to 27 carbon atoms and whereby the acid value owing to the carboxyl group or the carboxylic anhydride group of the resulting modified polymer being made not more than 10.

Esters of an adduct of diolefinic polymer and unsaturated dicarboxylic

A resin for coatings, particularly useful as a medium for printing inks and paints, comprising a modified polymer produced by adding at least one .alpha.,.beta.-unsaturated dicarboxylic acid or anhydride thereof to at least one liquid conjugated diolefinic polymer having a number average molecular weight of 150 to 3,000, a viscosity of 2 to 5,000 cps at 30.degree. C. and at least 50% of cis-1,4 structure and subjecting the resulting adduct to imidation or diamidation with at least one amine having 1 to 27 carbon atoms and whereby the total amine value of the resulting modified polymer being made not more than 3.

Resin for coatings

A process for production of a polymer emulsion comprising polymerizing at least one partially esterified, imidated or amidated product of an adduct with a compound having a polymerizable unsaturated group and a hydroxy group, epoxy group or amino group, in an aqueous system in the presence or absence of a vinyl monomer, said adduct being produced by adding an .alpha.,.beta.-unsaturated dicarboxylic acid or anhydride thereof to at least one compound selected from the group consisting of a synthetic unsaturated polymer having a number average molecular weight of 150 to 30,000 and an iodine value of 50 to 500, a natural drying oil, a natural semidrying oil and an unsaturated fatty acid which composes the natural drying or semidrying oils. The polymer emulsion shows excellent coating film properties when used for paints.

Process for production of novel polymer emulsion

An aqueous alkyd resin obtained by the neutralization of a polycondensation resin with a base, the polycondensation resin being prepared by reacting a reaction mixture obtained by the transesterification or esterification of (a) a natural fat and oil or a fatty acid with a polyhydric alcohol with an adduct of (b) a liquid polybutadiene having a number average molecular weight of 150 to 900, a viscosity of 2 to 80 cps. at 30.degree. C and at least 50% of the cis-1,4 structure with an .alpha.,.beta.-unsaturated dicarboxylic acid or the anhydride thereof, and/or the half-ester of said adduct, and with (c) an aromatic polycarboxylic acid or the anhydride thereof, and the polycondensation resin having free carboxyl groups in the amount corresponding to an acid value of 30 to 70 and containing 5 to 50% by weight of the component (b). This alkyd shows excellent coating film properties when used for water-base paints, printing inks and the like.

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Takatsuki, Japan

Minoru Hino