Schill + Seilacher “Struktol” Gmbh

Theresia Klose

Uwe Dittrich

Volker Borger

Dörte Becker

Volker Börger

Gisela Thummler

Gisela Thümmler

The invention relates to rubber compositions that are provided with polyorganosiloxanes as plasticizers. The rubber compositions can be vulcanized by means of a cross-linking resin and they are particularly suitable for use as curing bladders in the production of tires. The invention further relates to the use of polyorganosiloxanes as corresponding plasticizers.

Rubber compositions containing polyorganosiloxanes as plasticizers

The invention relates to the use of polyorganosiloxanes having 3 or more siloxane units, which have one or more organic fractions R, where Rhas one or more carbon-carbon multiple bonds and at least 4 carbon atoms, and wherein the presence of hydrocarbon fractions having a chain length of 5 to 50 carbon atoms is excluded, as additives in the processing of rubber. The polyorganosiloxanes are used in the processing and vulcanization of rubber in a quantity of 0.1 to 10 phr and incorporated by reaction in same. Said polyorganosiloxanes produce a reduction in the viscosity of the rubber during processing and optionally an improvement in the mechanical properties of the vulcanized rubber.

Use of polyorganosiloxanes in the processing and vulcanisation of rubber

The invention relates to the use of polyorganosiloxanes having 3 or more siloxane units, which has (i) at least one organic component R, where Rhas at least one carbon-carbon multiple bond, and (ii) at least one hydrocarbon component R, where Rhas a chain length of 5 to 50 carbon atoms. The polyorganosiloxanes are used in the processing and vulcanization of rubber and are incorporated reactively into it. They give rise to a lowering in the viscosity of the rubber in the course of processing and in some cases to an improvement in the mechanical properties of the vulcanized rubber.

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Dresden, Germany

Theresia Klose