Lanxess Deutschland Gmbh

Melanie Wiedemeier

Hermann-Josef Weidenhaupt

Ulrich Feldhues

Jan-Gerd Hansel

Irene Moll

Thomas Weiss

Heinz Unterberg

Thomas Weiß

A silica-containing rubber mixture is produced from a rubber, a sulphur-containing alkoxysilane, a crosslinking agent, a silica-containing filler, and 0.1 to 15 parts by weight, based on 100 parts by weight of the rubber, of a silicon-free polysulphide additive of the formula (I)A-S-(S)-S-Bwhere x is 0-4, and A and B are the same or different, are alkyl or aryl, and contain at last one oxygen, which may be in the form of a carboxyl group.

Rubber mixtures containing silicic acid and sulfur-containing additives

A silica-containing rubber mixture includes at least one rubber, a sulphur-containing alkoxysilane, a crosslinking agent, a filler, and optionally further rubber auxiliaries, and the mixture also includes from 0.1 to 15 parts by weight, based on 100 parts by weight of rubber used, of a silicon-free polysulphide additive of the formula (I)A-S&#x2014;(S)&#x2014;S&#x2014;Y&#x2014;S&#x2014;(S)&#x2014;S-A&#x2003;&#x2003;(I)where x is 0, 1 or 2, Y is an optionally substituted or heteroatom-containing aliphatic, cycloaliphatic or aromatic group, and A may include hydroxy, carboxy, or carboxyphenyl groups.

The present invention relates to a process for producing rubber mixtures in a mixing process with, for example, a plurality of mixing stages, where these can optionally be divided into a plurality of sub-steps, comprising the mixing of the following components:

Method for producing rubber mixtures

The invention relates to fast-gelling plasticizer preparations comprising at least one aryl alkylsulfonate of the formula R&#x2014;SO&#x2014;O&#x2014;Rand at least one diol dibenzoate of the general formula RC(O)O&#x2014;Y&#x2014;O(O)CRand/or at least one dibenzyl dicarboxylate of the general formula RCHO(O)C&#x2014;Z&#x2014;C(O)OCHR, and also to its use as plasticizer in plastics, and to plastics which comprise these plasticizer preparations.

Fast-gelling plasticizer preparations

The present invention relates to plasticizer preparations based on triacetin with short gel time, and to their use, and to polyvinyl chloride preparations.

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Dormagen, Germany

Melanie Wiedemeier