Bayer Aktiengesellschaft

Karl-Herbert Fritsch

Dieter Freitag

Uwe Westeppe

Claus H Wulff

Gunther Weymans

Werner Waldenrath

Carl Casser

Lutz Schrader

Peter Bier

Werner Nouvertne

Edgar Ostlinning

Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,

Polycarbonate from dihydroxydiphenyl cycloalkane

Polycarbonate from dihydroxy diphenyl cycloalkane

Copolycarbonates derived from known bisphenols and small quantities of dihydroxydiphenyl cycloalkanes corresponding to formula (I) ##STR1## wherein R.sup.1 and R.sup.2 denote, independently of one another, hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, preferably phenyl, and C.sub.7 -C.sub.12 aralkyl, preferably phenyl-C.sub.1 -C.sub.4 -alkyl, in particular benzyl,

Stabilized copolycarbonate from dihydroxy diphenyl cycloalkane

Dihydroxydiphenyl cycloalkanes, their production and their use for the

This invention relates to a process for the preparation of high molecular weight polyarylene sulphides from low molecular weight polyarylene sulphides by a reaction with elementary sulphur.

Preparation of high molecular weight polyarylene sulfide with mixing of

The present invention relates to a process for the production of thermoplastic polycarbonate injection-moulded shaped articles from polycarbonate melt strands, which is characterized in that polycarbonate melt strands are pressed through a circular orifice with a diameter of 1 to 8 mm, preferably 2 to 6 mm, and are then cooled to below their softening point, stretched in a ratio of between 1:1.5 and 1:8, preferably between 1:1.5 and 1:5, between room temperature and the softening point of the resulting polycarbonate strand, and are then granulated, and the resulting polycarbonate granules are processed in a known manner by the injection-moulding process at product temperatures of below 320.degree. C. preferably below 300.degree. C.

Process for the production of polycarbonate injection-moulded shaped

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Bergisch-Gladbach, Germany

Karl-Herbert Fritsch