Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Degussa - Huls Ag

Hans-Detlef Luginsland

Stefan Uhrlandt

Oleg Stenzel

Roland Krafczyk

Andre Hasse

Karsten Korth

Andre Wehmeier

Ingo Kiefer

Ulrich Deschler

Anke Blume

André Wehmeier

Michael Horn

Wolfgang Lortz

J&ouml;rg M&uuml;nzenberg

Juergen Heidlas

Christoph Batz-Sohn

Rudolf Michel

Reimund Pieter

Ralf Schmoll

Gerd Rainhard Zezulka

Herbert Thoma

Melanie Mayer

Michael Radcziwill

The present invention relates to highly disperse precipitated silicas which exhibit an extremely high level of reinforcement of rubber vulcanizates, to a process for their preparation, and to their use as filler for rubber mixtures.

Higly dispersible silica for using in rubber

The present invention relates to precipitated silicas which have extremely low microporosity and high rubber activity, to a process for their preparation, and to their use as filler for rubber mixtures.

Specially precipitated silicic acids for rubber applications

Highly dispersible silica for using in rubber

The present invention relates to a highly disperse precipitated silica which has a high surface area, to a process for preparing it, and to its use as a tire filler for commercial vehicles, motorbikes, and high-speed vehicles.

Highly dispersible precipitated silica

The present invention relates to a highly dispersible silica which has a high surface area, a process to manufacture the aforesaid silica and its use as a tire filler for utility vehicles, motor cycles and high speed vehicles.

High-surface precipitation silica acids

A composition containing organosilicon compounds having the formula I and/or II wherein R is ethyl, Ris a mixture such that the proportion of one component of the mixture is 10 to 50 mol % and is the same or different C-Cbranched or unbranched monovalent alkyl, and Ris a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C-Chydrocarbon is produced by reacting silanes having the formula III with mixtures of alcohols having the general formula R&#x2014;OH, with elimination of R&#x2014;OH, and R&#x2014;OH is continuously separated off from the reaction mixture by distillation. The organosilicon compounds can be used in rubber compounds.

Organosilicon compounds, process for their production and their use

Highly dispersible precipitated silica having a high surface area

Precipitated silicas useful, for example, as fillers in elastomer mixtures or vulcanizates have a particularly broad pore size distribution of the pores with a pore diameter smaller than that of the maximum of the derivative of the pore volume distribution function, and have simultaneously very low microporosity and high rubber activity.

Precipitated silicas with particular pore size distribution

Precipitated silicas which have a broad pore size distribution of the pores with a pore diameter smaller than that of the maximum of the derivative of the pore volume distribution function are useful, for example, for tires.

Precipitated silicas with a particular pore size distribution

Organosilicon compounds of the general formula I and/or II are produced by reacting silanes of the general formula III with alcohols of the general formula R'&#x2014;OH, with elimination of R&#x2014;OH, wherein R&#x2014;OH may be continuously separated from the reaction mixture by distillation. The organosilicon compounds may be used in rubber mixtures. Compounds, such as rubbers, produced using such organosilicon compounds.

Organosilicon compounds

Silane-modified biopolymeric, biooligomeric, oxidic or siliceous filler obtainable by reacting at least one biopolymeric, biooligomeric, oxidic or siliceous filler in a compressed gas with at least one silane. The silane-modified biopolymeric, biooligomeric, oxidic or siliceous fillers are used in rubber compounds.

Silane-modified biopolymeric, biooligomeric, oxidic or siliceous filler, process for its production and its use

A modified oxidic or silicate filler, comprising:

Silane-modified oxidic or silicate-like filler, process for its preparation, and its use

Rubber mixtures which contain an organosilane of the general structureRRSi&#x2014;R&#x2014;Z (I), wherein R, Rand Rindependently of one another are H, (C-C)alkyl, (C-C)alkoxy or halogen and the number of alkyl groups is &#x2267;1; Ris a linear or branched (C-C)alkylidene group; and Z=H, halogen, SCN, SH or S&#x2014;R&#x2014;SiRRR, where x is 2 to 10. The rubber mixtures are useful in molding compositions particularly for tires and tire treads.

Rubber mixtures

Organosilicon compounds of the general formula I and/or IIare produced by reacting silanes of the general formula IIIwith alcohols of the general formula R'&#x2014;OH, with elimination of R&#x2014;OH, wherein R&#x2014;OH may be continuously separated from the reaction mixture by distillation. The organosilicon compounds may be used in rubber mixtures. Compounds, such as rubbers, produced using such organosilicon compounds.

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Hans-Detlef Luginsland