Bayer Aktiengesellschaft

Joergen Weinschenck

Paul Wagner

Winfried Joentgen

Torsten Groth

Hans-Georg Pirkl

Thomas Menzel

Klaus-Peter Heise

Ursula Pentling

Frank Dobert

Polymers having recurring succinyl units are obtained by an improved process by reaction of A, an unsaturated C.sub.4 -dicarboxylic acid or a derivative thereof, with B, a nitrogen-donating compound, in a first reaction step to give a reaction mixture comprising at least one low molecular weight reaction product, and subsequent continuous feeding of the reaction mixture into a continuously operated reactor to give the polymer in a second reaction step. In a further embodiment the invention refers to polymers having recurring succinyl units prepared by reaction of an unsaturated C.sub.4 -dicarboxylic acid or a derivative thereof with a nitrogen-donating compound in a first reaction step and subsequent feeding of the reaction mixture, without intermediate isolation, into an optionally continuously operated reactor, with removal of water, and treatment of the reaction mixture at a temperature of 140 to 350.degree. C.

Process for the preparation of polymers having recurring agents

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Krefeld, Germany

Joergen Weinschenck