Bayer Aktiengesellschaft

Dieter Constant

Christian Lindner

Karl-Erwin Piejko

Dieter Freitag

Rolf Dhein

Claus H Wulff

Uwe Westeppe

Helmut-Martin Meier

Holger Lutjens

A thermoplastic molding composition containing an aromatic polycarbonate and a particular siloxane compound is disclosed. The composition which is based on a polycarbonate resin having bifunctional structural units corresponding to formula (Ia) ##STR1## wherein R.sup.1 and R.sup.2 denote, independently of one another, hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 -cycloalkyl, C.sub.6 -C.sub.10 -aryl, or C.sub.7 -C.sub.12 -aralkyl,

Stabilization of polycarbonates having high heat distortion temperatures

Process for pretreating abietic acid derivatives comprising dissolving an abietic derivative in water to form a 2 to 25% by weight solution, adding a base so that the pH of the solution is from 10 to 14 and removing from 0.5 to 25% by weight of the abietic acid derivative originally present in the solution by extraction or steam distillation while maintaining the pH from 10 to 14.

Abietic acid derivatives and their use as emulsifiers

A process for the preparation of polymer combinations having high rubber contents from A) aromatic polyesters and B) at least partially cross-linked rubbers, in which

Polymer combinations with a high rubber content

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Leverkusen, Germany

Dieter Constant