Bayer Aktiengesellschaft

Manfred Abele

Hans-Josef Buysch

Hugo Vernaleken

Heinrich Schrage

Theo Kempermann

Ernst Roos

Werner Obrecht

Thomas Scholl

Rudiger Schubart

Paul Uhrhan

Werner Jeblick

Reinhard Preuss

Hermann Fries

Michael Happ

By-products from the chlorination of butadiene may be reacted with phenols in the presence of iron catalysts to form Novolak type phenol resins.

Process for the preparation of phenol resins using by-products of the

Phenolic resins obtainable by Friedel-Crafts alkylation of phenols with polyfunctional compounds are eminently suitable as a reinforcing resin for rubber vulcanizates.

Use of certain phenolic resins for reinforcing rubber vulcanizates

Secondary products formed in the chlorination of butadiene can be reacted with phenols in the absence of iron catalysts to form novolak-like phenolic resins in such a way that the tetrachlorobutane present in the secondary products does not react. It can be distilled off with the excess phenol and isolated in pure form from the distillate obtained.

Process for the isolation of tetrachlorobutane and for the production of

Phenolic resins obtained by condensation from alkylphenol, aldehyde, polyamine and polyether in a molar ratio of 1:0.7 to 1.3:0.005 to 0.2:0.001 to 0.3 are suitable as tackifiers for rubber mixtures.

Phenolic resins using polyamines and polyethers in their production

A mixture of azodicarbonamide and an .alpha.-amidosulphone corresponding to the general formula: ##STR1## in which R represents hydrogen, a C.sub.1 -C.sub.4 -alkyl residue and/or halogen,

Mixtures of azodicarbonamide and .alpha.-amidosulphones and their

Sulphenamides are obtained by reacting N-chlorothiophthalimide with compounds containing one or two olefinic double bonds. These products retard vulcanization of natural or synthetic rubber.

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Cologne, Germany

Manfred Abele