Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Degussa - Huls Ag

Evonik Operations Gmbh

Stefan Uhrlandt

Hans-Detlef Luginsland

Oleg Stenzel

Anke Blume

Andre Wehmeier

Ralf Schmoll

André Wehmeier

Mustafa Siray

Burkhard Freund

Herbert Thoma

Claus-Peter Drexel

Bernhard Schwaiger

Arnold Storeck

Detlef Luginsland

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 precipitated silica containing aluminum, which has an adjustable BET/CTAB ratio, a process for its manufacture and its use.

Aluminum-containing precipitated silicic acid having an adjustable BET/CTAB ratio

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

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

A silica comprising at least two silica fractions, wherein said at least two silica fractions differ by at least 10% in at least one value for BET surface area, CTAB surface area and DBP absorption, the ranges of these three physicochemical properties being as follows: 

Inhomogeneous silicas as carrier material

A silica having a high degree of dispersibility and a low dust concentration contains at least two silica fractions that differ by at least 10% in at least one value of BET or CTAB surface area or DBP absorption.

Inhomogeneous silicas for elastomer compounds

A silica comprising at least two silica fractions, wherein the at least two silica fractions differ by at least 10% in at least one of their BET surface area values, their CTAB surface area values or their DBP absorption values, the ranges of these three physicochemical properties being as follows:

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Belle Mead, NJ, United States of America

Stefan Uhrlandt