Wacker Chemie Ag

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Consortium Fur Elektrochemische Industrie Gmbh

Torsten Gottschalk-Gaudig

Volker Stanjek

Juergen Pfeiffer

Richard Weidner

Uwe Scheim

Herbert Barthel

Christoph Briehn

Frank Sandmeyer

Bernard Paul Binks

Michael Dreyer

Peter Ball

Michael A Lucarelli

Oliver Schaefer

Dominik Jantke

Mario Heinemann

Siegfried Dormeier

Johann Weis

Thomas Kornek

Konrad Hindelang

Helmut Maginot

Hans-Jurgen Eberle

Alfred Popp

Roland Heidenreich

Achim Schneider

Manfred Hoelzl

Jürgen Pfeiffer

Johann Doppelberger

Markus Niemetz

Stephan Loskot

Joachim Pohl

Ute Voelkel

Christopher Briehn

Ute Volkel

Klaus Obermeier

Claudia Kirschner

Tommy S Horozov

Carl-Heinz Ehrke

Henri Balard

Martina Baumann

Klaus Obermeir

Ute Völkel

Manfred Hölzl

A low-viscosity, electrically conductive, CNT-containing siloxane composition along with processes for producing the same, uses for the same and articles made therefrom. The siloxane composition includes a) 0.1-5 wt % CNTs; b) 70-97.9 wt % of at least one siloxane, which is selected from compounds of the general formula (I); c) 1-20 wt % of at least one hydrophobic silicic acid, which is surface-silylated by at least one organosilicon compound selected from organosilanes of the formula (IV) and organosilazanes of the formula (V); and d) 0-5 wt % of other fillers. Where the proportions relate to the total weight of the composition and the total of all components a) to d) equals 100 wt %.

Formulation of CNT-containing siloxanes containing silicic acid

A generative process for the manufacture of three-dimensional mouldings is characterized by constructing the moulding stepwise by site-specific delivery of a structure-forming material in liquid form, where a second material is additionally delivered as a supportive material into regions which are intended to remain free from the structure-forming material, and is removed once the structure-forming material has been solidified. The supportive material exhibits low shrinkage upon cooling and is particularly stable in the cooled state and further exhibits low surface roughness.

Method for producing shaped bodies

3D moldings are prepared by applying a viscoelastic supportive material comprising a polyether and a particulate rheological additive in at least some positions where a curable structure forming material is not desired, and following completion of the molding, the supportive material is removed.

Method for producing molded bodies

It is an object of the invention to provide an economically viable process for the production of hydrophobized aerogels which works both inexpensively and in a resource-conserving manner. 2.2. This object is achieved by the provision of a process for producing organically modified aerogels by producing a sol containing [SiO] units and [RSiO] a units, where x may be the same or different and is 1, 2 or 3, and R may be the same or different and is hydrogen or an organic substituted or unsubstituted radical, using the sol to form a gel, surface-modifying the gel obtained in the presence of more than 0.1% by weight of a phase modifier in a mixture comprising organosiloxane and initiator, wherein the mixture contains at least 20% by weight of organosiloxane and wherein the initiator consists of acid or organosiloxane or mixtures thereof and the gels obtained are dried. 2.3. The aerogels provided can be used as insulating materials, especially in thermal insulation.

Process for producing organically modified aerogels

Metal oxides surface modified with M and D groups where the D groups are in excess relative to the M groups exhibit high rheology properties in liquid compositions and provide products with elevated mechanical properties. The modified metal oxides contain a significant quantity of unreacted silanol groups, and can be more easily incorporated into polar organic substances, and also increase physical properties of cured polymers containing the modified metal oxides.

Modifying the surfaces of metal oxides by means of chain-like structures

Improved utilization of organosilicon compounds in hydrophobicizing finely divided particulate solids is accomplished by metering a partial amount of unreacted solids with organosilicon containing offgases derived from admixing and reacting a major portion of solids with organosilicon compounds and admixing the offgas-treated solids with the major portion of solids to be treated.

Process for surface modification of particulate solids

Shaped bodies with good strength properties are prepared from pyrogenic metal oxide(s) by suspending the metal oxide(s) in a liquid, milling to activate the metal oxide particles, forming an activated homogenous suspension, coagulating the suspension, and forming shaped bodies therefrom.

Method for producing stable, high-purity molded bodies from pyrogenic metal oxides without the addition of binders

Oil-in-water emulsions contain an oil dispersed phase, an aqueous continuous phase, and partly silylated pyrogenic silica having a content of silanol groups of 1.7 to 0.9 SiOH/nmwherein 50% to 95% of silanol groups of the starting silica are silylated, present at the interface between the dispersed phase and the continuous phase and an electrolyte content in the aqueous phase which establishes the viscosity of the emulsion.

Rheology control of Pickering emulsions by electrolytes

Modified silicas having low silanol content which are compatible with polar compositions are prepared by modifying silica with a difunctional reactive organosilane or polydialkylsiloxane under oxidizing conditions below 400&#xb0; C. The silicas have a distinct proportion of T, T, and Tgroups.

Hydrophobicization of silicas under oxidizing conditions

Particles with a structural surface which are useful to produce abrasion resistant self-cleaning surfaces contain particulate solid particles having a superstructured overlayer of fine particles. The particles may be prepared by polymerizing a polymerizable siloxane, silane, or mixture thereof in a Pickering emulsion.

Particles with structured surface

Metal oxides are modified by aminohydrocarbyl-substituted monoalkyltrisiloxy groups in a defined percentage of Tand Tgroups relative to total T groups wherein the T groups denote connectivity of siloxy bonds to the metal oxide have a high positive triboelectric chargeability, the triboelectric charge being stable even in conditions of high humidity.

Highly disperse metal oxides having a high positive surface charge

The invention relates to water-in-oil (W/O) or oil-in-water (O/W) emulsions containing an oil phase of at least one water-insoluble constituent; an aqueous phase; pyrogenic silica at the oil-water interface, the pyrogenic silica partially silylated such that non-silylated surface silanol groups remaining are between 95% and 5% of initial silanol groups, the equivalent of 1.7 to 0.1 surface SiOH groups per nm, a surface energy gamma-s-D of 30 to 80 mJ/m, and a specific BET surface area between 30 and 500 m/g; and optionally other substances, such as pigments or preservatives. The inventive emulsions have a mean particle size of the dispersed phase, of between 0.5 &#x3bc;m and 500 &#x3bc;m, and are of low viscosity.

Particle-stabilised emulsions

Partly hydrophobic metal oxides are prepared by silylating a metal oxide with

Water-wettable silylated metal oxides

Solid particles bearing zwitterionic functional groups exhibit properties unlike other functionalized particles, and are particularly useful as proton-conductive fillers in membranes for fuel cells, where they increase physical properties as well as charge conducting properties. The particles are prepared by reacting functionalized particles with zwitterionic group-containing silanes or siloxanes.

Particles comprising zwitterionic structural elements

Particles useful in curable coating systems are functionalized on their surface with a blocked isocyanate functionality. The blocked isocyanate is generated by reacting an organosilane having an oxygen, sulfur or nitrogen atom &#x3b1; to the silyl group, or having a cyclic structure containing N or O in the ring, attached directly to silicon.

Particles with protected isocyanate groups

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Mehring, Germany

Torsten Gottschalk-Gaudig