Bayer Aktiengesellschaft

Dietrich Rathmann

Dieter Freitag

Volker Serini

Manfred Schmidt

Ulrich R Grigo

Thomas Scholl

Klaus Reinking

Leo Morbitzer

Klaus Kircher

Siegfried Thurm

Winfried Paul

Lutz Schrader

Christian Leuschke

Reimer Holm

Ross Savage

The new polyester carbonate-polysiloxane block copolymers having recurrent structural units of the following formulae ##STR1## have improved resistance to petrol compared with known polyester carbonate-polysiloxane block copolymers. They are used for the manufacture of moulded products, in particular those used under the engine bonnet of a motor vehicle or as external parts of motor vehicles.

Thermoplastic polyester carbonate-polysiloxane block copolymers

This invention relates to a process for coating moulded plastic articles of thermoplastic polycarbonates or thermoplastic polyarylene sulphides with metal oxides, to the moulded plastic articles obtainable by the process according to the invention and to their technological application for outdoor use, for example for the production of coverings or facings in the building industry.

Process for the production of plastic moulded articles with improved

Optionally substituted 3-benzalphthalides are effective UV stabilizers for thermoplastic aromatic polyesters, polycarbonates and polyester carbonates.

Use of 3-benzalphthalides as UV stabilizers for thermoplastic, aromatic

Mixtures of aromatic polycarbonates and aromatic polyester-carbonates having a specific polycarbonate/polyester-carbonate ratio and a defined ester content in the polyester-carbonates, at least one of the polycondensates containing C.sub.8 -C.sub.9 -alkylated phenyl end groups, possess a reduced tendency to stress cracking.

Mixtures of aromatic polycarbonates and aromatic polyester-carbonates,

Aromatic polyester-carbonates having greatly differing contents of ester groups possess an improved notched impact strength.

Process for the preparation of aromatic polyester-carbonates having

Siloxane/polyester (carbonate) block copolymers comprising wholly aromatic polyester or polyestercarbonate units and from 0.5 to 7.5% by weight of polysiloxane blocks, exhibit an improved melt flowability without impairment of the heat stability.

Thermoplastic polysiloxane-polyester (carbonate) block copolymers, their

Certain substituted diphenyl ethers improve the flowability of aromatic polyesters and polyester carbonates in the melt.

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Leverkusen, Germany

Dietrich Rathmann