Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Andre Hasse

Ingo Kiefer

Karsten Korth

Susann Witzsche

Oliver Klockmann

Philipp Albert

Reimund Pieter

Hans-Detlef Luginsland

Ulrich Deschler

Dorit Wolf

Steffen Seebald

Jaroslaw Monkiewicz

Michael Horn

Manuel Friedel

Roland Krafczyk

Alfred Alig

Jürgen Heidlas

Dirk Laur

Martin Ober

Sascha Erhardt

Kurt Eichenauer

Juergen Heidlas

Christian Hoppe

Rudolf Zobel

Julia Keck

Rainer Friehmelt

Alfreg Alig

Kurt Stork

Christian Springer

Albert Frings

Louis Janssens

Stefan Lotter

Inge Kiefer

Horst Mertsch

Relmund Pieter

Stephanie Schwan

Sefan Koenigstein

Helmut Droege

Jörg Kiefer

Jörg Schmidt

Helmut DRÖGE

Lothar Lehnbaur

Mandy Weber

Stefan Koenigstein

Mercaptosilanes are disclosed of the formula I wherein Ris an alkyl polyether group &#x2014;O&#x2014;(R&#x2014;O)&#x2014;R. They are prepared by a procedure in which a silane of the formula II is subjected to a catalyzed reaction with an alkyl polyether R&#x2014;H, R&#x2014;OH being split off, the molar ratio of the alkyl polyethers R&#x2014;H to the silane of the formula II is at least 0.5 and R&#x2014;OH is separated off from the reaction mixture continuously or discontinuously. They can be used in shaped articles.

Mercaptosilanes

Mixtures of silicon-containing coupling reagents comprising (mercaptoorganyl)alkylpolyethersilanes containing silanol groups and (mercaptoorganyl)alkylpolyethersilanes free of silanol groups in a weight ratio of from 5:95 to 95:5. The mixtures can be prepared by transesterification and hydrolysis. The mixtures can be used in rubber mixtures.

Mixtures of silicon-containing coupling reagents

The invention relates to a process for preparing silicon-containing azodicarbamides of the general formula (I) (R)(R)Si&#x2014;R&#x2014;NH&#x2014;C(O)&#x2014;N&#x2550;N&#x2014;C(O)&#x2014;NH&#x2014;R&#x2014;Si(R)(R)(I), by reaction of azobiscarboxy compounds of the general formula II R&#x2014;X&#x2014;C(O)&#x2014;N&#x2550;N&#x2014;C(O)&#x2014;X&#x2014;R(II) with aminosilanes of the general formula III (R)(R)Si&#x2014;R&#x2014;NH(III).

Process for preparing silicon-containing azodicarbamides

Rubber mixtures, including at least one rubber, a filler, an organosilicon compound of the formula I one rubber accelerator and one co-accelerator. The rubber mixtures are prepared by mixing at least one rubber, a filler, an organosilicon compound of the formula I, one rubber accelerator and one co-accelerator. The rubber mixtures can be used for production of moldings. Also disclosed is a process for preparation of the organosilicon compound of the formula I via transesterification.

Rubber mixtures

Rubber mixtures containing at least one rubber and an organosilicon compound of the general formula (I) (Q-)G-Si(&#x2014;O&#x2014;CXX&#x2014;CXX&#x2014;)N. The rubber mixture is prepared by mixing at least one rubber and an organosilicon compound of the formula (I). The rubber mixtures can be used for the production of moldings.

The invention relates to a method for producing organosilanes of general formula I,[R(R)(R'O)Si&#x2014;R&#x2033;&#x2014;]S&#x2003;&#x2003;Iby reaction of (halo-organo)alkoxysilanes of formula II,[R(R)(R&#x2032;O)Si&#x2014;R&#x2033;-Hal&#x2003;&#x2003;IIwith a sulfuring reagent, selected from alkaline hydrogensulfide, alkaline sulfide MeS, alkaline polysulfide MeSand any combination thereof and optionally additionally with sulfur and/or with HS in a solvent, the alkaline hydroxy content of all materials used being &#x3c;0.44 wt. %.

Method for producing organosilanes

The invention relates to a process for preparing organosilanes of the general formula I by reacting (haloorganyl)alkoxysilane of the formula II with hydrous alkali metal hydrogensulphide, sulphur and alkali metal carbonate in alcohol, wherein the molar (haloorganyl)alkoxysilane of the formula II to alkali metal hydrogensulphide ratio is between 1:0.4 and 1:0.75, and the molar alkali metal hydrogensulphide to alkali metal carbonate ratio is between 1:0.5 and 1:1.5.

Process for preparing organosilanes

Mercaptosilanes and derivatives thereof

The invention relates to a method for producing (mercaptoorganyl)alkyl polyether silanes by reacting dry mercaptization reagents with a (haloorganyl)alkyl polyether silane.

Method for the production of (mercaptoorganyl)alkyl polyether silanes

The invention relates to organosilicon compounds, and to the ways in which they can be made and used.

Organosilicon compounds their preparation and their use

The invention relates to rubber mixtures, comprising: (A) at least one rubber, (B) at least one oxidic filler and (C) at least one (haloorganyl)alkylpolyethersilane of the general formula (X)(X')(X&#x2033;)Si&#x2014;R-Hal. The rubber mixtures can be used for production of mouldings.

Rubber mixtures are disclosed comprising (A) at least one styrene-butadiene rubber, (B) at least one filler and (C) at least one polysulphidic organo(alkyl polyether silane) of the general formula I[(X)(X')(X&#x2033;)Si&#x2014;R]&#x2014;S&#x2003;&#x2003;I.The mixtures are prepared by mixing at least one styrene-butadiene rubber, and at least one filler and one polysulphidic organo(alkyl polyether silane) of the formula (I). The rubber mixtures can be used for the production of mouldings.

The present invention relates to a process for preparing mercaptoorganyl(alkoxysilanes), by hydrogenating bis(alkoxy-silylorganyl) polysulphides with hydrogen in the presence of at least one alcohol and a doped metal catalyst. The doped metal catalyst comprises at least one substance from the group consisting of iron, iron compound, nickel, nickel compound, palladium, palladium compound, osmium, osmium compound, ruthenium, ruthenium compound, rhodium, rhodium compound, iridium and iridium compound plus at least one doping component.

Process for preparing mercaptoorganyl (alkoxysilanes)

A process for the preparation or organosilanes of the formula I by reacting a (haloorganyl)alkoxysilane of the formula II with a sulphurization reagent selected from the group consisting or alkali metal hydrogen sulphide, alkali metal sulphide MeS, alkali metal polysulphide MeSand any desired combinations thereof, and optionally additionally with sulphur and/or with HS, in an alcohol, the MeS or MeScontaining more than 10% by weight of water and the alkali metal hydrogen sulphide containing more than 3% by weight of water.

Process for the preparation of organosilanes

Process for the extraction of substances from at least one silane-modified oxidic or silicatic filler, wherein at least one gas compressed by means of pressure and/or temperature is employed as the extraction agent and the compressed gas is led in the radial direction through the filler in the pressure container and/or the substances extracted from the silane-modified filler are removed from the compressed gas with a suitable sorbent. A device for carrying out the process is furthermore described, wherein this comprises at least one pressure container having at least one internal container, sieve or insert for accommodation of the fillers which is permeable to gas and at least one gas feed and gas removal in the bulk bed of filler, and has a radially designed gas feed or gas removal from the bulk bed of filler.

Process and device for the extraction of substances from silane-modified fillers

Growing community of inventors

Grenzach-Wyhlen, Germany

Karsten Korth