Bayer Aktiengesellschaft

Erich Meier

Rolf Dhein

Knud Reuter

Gunther Weymans

Dieter Freitag

Gerold Muller

Manfred Schmidt

Werner Rasshofer

Joachim Wagner

Ulrich Eisele

Christian Weber

Ernst-Ulrich Dorf

Wolfgang Russeler

Hanns-Ingolf Paul

Rudiger Plaetschke

Eberhard Jurgens

Gunter Weymans

Gunther Weymanns

Mixtures containing aromatic polyether ketones based on diphenols corresponding to formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1-8 alkyl, C.sub.5-6 cycloalkyl, C.sub.6-10 aryl and C.sub.7-12 aralkyl,

Polymer mixtures of an aromatic polyether ketone and a thermoplastic

The invention relates to linear and branched poly-p-arylene sulfides (PAS), preferably poly-p-phenylene sulfides (PPS), which have an extremely low proportion of defect or foreign structures, to a process for their production and to their use for the production of molded articles.

Linear and branched poly-p-arylene sulfide substantially free from

37 Highly dispersed mixtures of at least two polymers which are not completely miscible in the melt under customary conditions are produced by melting the polymers used in the presence of supercritical gases or mixtures of gases, intensively thoroughly mixing the molten polymers for long enough until the viscosity of the melt has diminished by at least 10%, subsequently cooling the polymer melt with further thorough mixing, until the viscosity of the melt has at least reached the original value again and then depressurizing the polymer melt. The highly dispersed mixtures produced in this way can be processed in the customary manner into mouldings.

Process for the production of finely dispersed polymer mixtures

Polyether sulphones based on diphenols corresponding to the following general formula (I): ##STR1## wherein R.sup.1 and R.sup.2, independently represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 or C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, or C.sub.7 -C.sub.12 aralkyl; m represents an integer of from 4 to 7;

Aromatic polyether sulphones based on dihydroxy-diphenyl-cyclo-alkanes

The present invention relates to a process for the preparation of moldings or films based on polyisocyanate polyadducts comprising thermoplastically molding, at a temperature of at least 50.degree. C. and at a pressure of at least 5 bar, polyisocyanate polyadducts obtained by reacting in closed molds using the reaction injection molding technique aromatic polyisocyanates; compounds having a molecular weight of from 1800 to 12,000 and containing on a statistical average at least 2.5 isocyanate-reactive groups; and one or more components selected from a diamine containing two primary and/or secondary aromatically bound amino groups and and an aliphatic or cycloaliphatic polyol or polyamine; with the provisos that the quantity of isocyanate-reactive compound is at least 30% by weight based on the total quantity of the components and that at least one of the diamine, polyol, or polyamine components comprises at least 5% by weight based on the weight of the isocyanate-reactive compound.

Process for production of moldings or films from polyisocyanate

Polyether ketones based on diphenols corresponding to the following general formula (I): ##STR1## wherein R.sup.1 and R.sup.2, independently represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 or C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.12 aralkyl;

Aromatic polyether ketones

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Leverkusen, Germany

Erich Meier