Sumitomo Chemical Company, Limited

Fumiyuki Kimura

Kentaro Mashita

Masaaki Hirooka

Yoshikazu Fujii

Novel alternating copolymers having functional groups are prepared by subjecting to alternating copolymerization at least one olefin, at least one acrylic ester and at least one .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative represented by the formula: ##EQU1## wherein Y and Z are independently --O--, --S--, or --NR.sup.3 --, and R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen or hydrocarbon groups having 1 to 20 carbon atoms. Said alternating copolymer consists essentially of a structure in which said olefin is bonded to only said acrylic ester or said .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative, and said acrylic ester and said .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative are bonded to only said olefin, and has a sufficiently high molecular weight.

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Settsu, Japan

Fumiyuki Kimura