Bayer Aktiengesellschaft

Frank-Gerald Kleiner

Dieter Arlt

Karsten-Josef Idel

Volker Eckhardt

Robert Becker

Axel Bader

This invention relates to a process for the production of carbonic acid esters from carbonyl compounds and organic hydroxy compounds, such as alcohols and phenols, in the presence of oxidizing metal ions.

Process for the production of carbonic acid esters

Low-melting polymers containing at least one Z-configured stilbene group are produced by reaction of Z-configured bifunctional stilbene compounds with bifunctional monomers, oligomers or relatively high molecular weight components at temperatures in the range from -30.degree. to 250.degree. C., optionally in the presence of organic solvents and/or diluents and/or catalysts, the Z-configuration of the stilbene units remaining intact. The low-melting polymers may be processed by standard methods to moldings of various kinds which may be converted by treatment of temperatures of 250.degree. to 500.degree. C. and/or by irradiation at wavelengths of 200 to 800 nm into high-melting plastics articles of high heat resistance.

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Leverkusen, Germany

Frank-Gerald Kleiner