Bayer Aktiengesellschaft

Kurt Weirauch

Hugo Vernaleken

Dieter Freitag

Rolf Dhein

Rolf-Volker Meyer

Karl-Erwin Piejko

Uwe Hucks

Uwe Westeppe

Walter Schafer

Jochen Schoeps

Gunther Weymans

Friedrich Fahnler

Dietrich Michael

Karl-Heinrich Meyer

Claus Burkhardt

Horst Beicher

Gunther Lenz

Alfred Horbach

Dieter Wittman

Thermoplastic molding compounds containing

Powder mixtures for matt polycarbonate molding compounds

Mixtures of special new polycarbonates with other thermoplastics or with

Polyamide block copolymers obtained by activated anionic polymerization of lactams having at least 5 ring members in the presence of basic catalysts, polyisocyanates as activators and amino-terminated polyethers, which are characterized in that the amino-terminated polyethers have a functionality of at least 3.0 preferably at least 3.2, and a molecular weight of at least 3500, and the polyisocyanates are aliphatic or cycloaliphatic polyisocyanates.

Branched thermoplastically processible impact-resistant polyamides

The subject of the instant invention are polycarbonates based on diphenols of the formula I ##STR1## wherein Y is a single bond, an elkylene- or alkylidene-radical with 1 to 7 carbon atoms, a cycloalkylene- or cycloalkylidene-radical with 5 to 12 carbon atoms, ##STR2## which have weight average molecular weights (M.sub.LS) measured by light scattering of at least 15 000 and which are characterized in having an average of zero to 1.5 mols, preferably 0.3 to 1.0 mols and especially 0.3 to 0.8 mols endgroups per mol polycarbonate. The subject of instant invention is also a process for preparing these polycarbonates according to the interfacial polycondensation method, the polycarbonates thus obtained and the use of the polycarbonates according instant invention for the preparation of compounds and films.

Macrocyclic polycarbonates

Moulding compositions for the production of mouldings with fire-retarding properties and with a polytriazine structure, comprising mixtures of (A) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-free cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents, and (B) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-containing cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents.

Moulding compositions of mixtures of halogen-containing and halogen-free

A continuous process for the production of a bisphenol bischlorocarbonic acid ester wherein an aqueous solution of a dialkali metal salt of a hydroquinone or a bisphenol is reacted in a pump circulating system with 2.5 to 5.0 mol, per mol of dihydroxy compound of phosgene dissolved in a suitable solvent for the bischlorocarbonic acid ester formed in the reaction under the addition of an alkali metal hydroxide solution to keep the pH-value between 9.0 and 12.0, the organic phase obtained is separated wherefrom the bisphenol bischlorocarbonic acid ester is isolated by distillation and/or crystallisation.

Process for the preparation of a bisphenol bischlorocarbonic acid ester

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Bergisch Gladbach, Germany

Kurt Weirauch