Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Other

Degussa - Huls Ag

Uwe Schachtely

Mario Scholz

Christian Panz

Ralf Schmoll

Ralph Hofmann

Dieter Kuhn

Henning Karbe

Thomas Welker

Thomas Hennig

Rainer Friehmelt

Helmut Mangold

Klaus Deller

Jürgen Meyer

Juergen Meyer

Werner Hartmann

Frank Menzel

Werner Niedermeier

Michael Kempf

Hauke Jacobsen

Roland Schaffer

Joachim Fröhlich

Ulrich Boes

Gerold Schmidt

Werner Michel

Guenter Stein

Harald Troll

Thomas Schiener

Andrea Tietze

Günter Stein

Joachim Froehlich

Joerg Roeder

Guido Scharf

Uwe Kinzlinger

Didier Lagneaux

Thermoplastic elastomer mixture which comprises at least one thermoplastic elastomer TPE, with the exception of a thermoplastic polyurethane TPU, and at least one filler from the group of precipitated silica, or precipitated silicate or carbon black. The thermoplastic elastomer mixtures are produced by, in a first step, mixing at least one filler selected from the group of precipitated silica, or precipitated silicate or carbon black, and at least one thermoplastic to give a masterbatch and, in a second step, mixing the masterbatch with at least one thermoplastic elastomer, with the exception of a thermoplastic polyurethane TPU. The thermoplastic elastomer mixture can be used in injection-molded items.

Thermoplastic elastomer mixtures

Thermoplastic elastomer, which comprises a fumed, hydrophilic or hydrophobic silica, which has been structurally modified and also a process for the improvement of the mechanical properties of thermoplastic elastomers. The thermoplastic elastomers are produced by preparing a masterbatch from the components (e.g. thermoplastic resin component and fumed silica) and compounding this with further thermoplastic elastomers.

Thermoplastic elastomers

Rubber mixtures are prepared by using, alongside the other constituents, pyrogenically prepared silicon dioxide in the form of crusts whose tamped bulk density (to DIN EN ISO 787-11) is from 185 to 700 g/l.

Process for preparation of rubber mixtures containing silicon dioxide

Thermoplastic matrix/compound, comprising thermoplastic polymer and silanised, structurally modified, pyrogenically produced silica.

Thermoplastic compound/matrix

Pyrogenically prepared silicon dioxide is compacted to give crusts, in that it is subject to preliminary de-aeration, and is compacted to give crusts, and the crusts are broken and, if appropriate, classified. The tamped bulk density (to DIN EN ISO 787-11) of the silicon dioxide compacted to give crusts is from 185 to 700 g/l. It can be used as filler in rubber mixtures.

Pyrogenically prepared silicon dioxide compacted to give crusts

The invention relates to hydrophobicized precipitated silicas that possess an extremely high whiteness and extremely low moisture absorption. The hydrophobic precipitated silicas are prepared, inter alia, by coating with silicone oil and oxidative heat treatment.

High-whiteness hydrophobic precipitated silica with ultralow moisture absorption

The invention relates to silicone rubber formulations comprising organopolysiloxanes and hydrophobicized silicas, which possess an extremely high level of whiteness.

Silicone rubber formulations with hydrophobic silicas

The stability of polymers against the action of heat and flames is improved in that a pyrogenically produced titanium dioxide containing iron oxide is added to the polymers.

Method for improving the stability of polymers

Hydrophobic, pyrogenically produced oxides having a ratio of dimethylsilyl groups to monomethylsilyl groups of 100:0 to 50:50 are prepared by using siloxanes or methylsiloxane mixtures D3 to D9 as hydrophobing agent.

Method of producing hydrophobic pyrogenically produced oxides

Silica with the following physico-chemical properties:

Silanized silica

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Kahl am Main, Germany

Uwe Schachtely