Bayer Aktiengesellschaft

Joachim Herzig

Andreas Bulan

G&uuml;nter Lailach

Birger Knickel

Cornelia Dorzbach-Lange

Kurt Bredtmann

A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds, in which the quantity of charge which the electrolyte can still take up is kept in the range from about 5 Ah per kg of electrolyte to about 600 Ah per kg of electrolyte during the electrochemical fluorination, can be operated continuously over a prolonged period of time without the electrode area-time yield decreasing over time and without the formation of polymeric by products occurring.

Process for preparing perfluorinated organic compounds by electrochemical fluorination

A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds using hydrogen fluoride having an arsenic content of less than about 10 ppm can be operated over a prolonged period of time without the electrode area-time yield decreasing over time.

The invention relates to mineral building materials which contain binders, optionally aggregates and at least one additive, characterized in that the additives used are compounds which are condensation products of substituted or unsubstituted diphenyl sulphones, formaldehyde and compounds from the group consisting of mononuclear or polynuclear, substituted or unsubstituted aromatic compounds, acid amides, urea, urea derivatives, substituted or unsubstituted aromatic ethers and imines.

Mineral building materials with additives

A room temperature vulcanizable silica-containing silicone rubber can be produced without pretreatment of the silica by mixing specified amounts of

Two-component silicone rubber

A viscosity-stable composition comprising by weight A. about 20 to 100 parts of a linear polyorganosiloxane of the formula ##STR1## in which R is an optionally substituted hydrocarbon radical with up to 10 C atoms,

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Leichlingen, Germany

Joachim Herzig