Degussa Aktiengesellschaft

Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Other

Degussa - Huls Ag

Rudolf Michel

Ulrich Deschler

Peter K Kleinschmit

J&ouml;rg M&uuml;nzenberg

Peter Panster

Christoph Batz-Sohn

Roland Krafczyk

Hans-Dieter Pletka

Wolfgang Buder

Siegfried Wolff

Werner Will

Harald Alff

Gerd Rainhard Zezulka

Jorg Munzenberg

Thomas Goebel

Josef Karl

Werner Schwarze

Rudolf Schwarz

Hans-Detlef Luginsland

Raymund Sonnenschein

Friedrich Thurn

Alfred Alig

Eugen Meyer-Simon

Georg Hellwig

Karl-Heinz R&uuml;tzel

Carl Van Der Auwera

Jorg Munzengerg

Michael Albert

Gerhard Dusing

Ivo Vryens

Organosilicon compounds

Process for the production of yellow bis(3-&lsqb;triethoxysilyl&rsqb;propyl)polysulfane with an average sulfur chain length of less than 4 and an iodine colour value of &lE;10 mg iodine/100 ml, wherein neutral chloropropyltriethoxysilane is mixed with chloropropyltrichlorosilane and then reacted with sodium sulfide (Na S) and sulfur, disodium tetrasulfide (Na S ) and Na S or disodium trisulfide (Na S ) and Na S in ethanol.

Process for the production of yellow bis(3-&lsqb;triethoxysilyl&rsqb;-propyl) polysulfane

Propyl silanes functionalized in 3-position are produced by catalytically reacting allyl compounds of the formula H C&boxH;CH&mdash;CH X with silanes of the formula R R R SiH and using a 3- to 100-fold excess of silane.

Process for the production of propyl silanes functionalized in 3-position

The invention relates to a process for the production of organosilylalkyl polysulfanes by reacting an organosilylalide alkyl halide and an anhydrous or virtually anhydrous ionic sulfide and elementary sulfur, wherein the elementary sulfur and organosilylalkyl halide are suspended in a polar organic solvent and the ionic sulfide is added to this suspension.

Process for the production of organosilylalkyl polysulfanes

The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R R R SiR ) S (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R R R SiR ) S (II) with an ionic sulfide of the general formula M S (III) and an organosilylalkyl halide of the general formula R R R SiR X (IV), the long-chain organosilylalkylpolysulfane of the general formula (II) and the organosilylalkyl halide of the general formula (IV) being initially introduced into the reaction vessel and the ionic sulfide of the general formula (III) being added to this solution in several portions.

Process for the preparation of organosilylalkylpolysulfanes

Process for the preparation of yellow bis(3-&lsqb;triethoxysilyl&rsqb;propyl)tetrasulfane having an iodine colour value of &lE;10 mg of iodine/100 ml, in which process a small amount of chloropropyltrichlorosilane is added to neutral chloropropyltriethoxysilane and reaction with sodium polysulfide or with Na S and sulfur in ethanol is then carried out.

Process for the preparation of yellow bis (3-&lsqb;triethoxysilyl&rsqb;propyl) tetrasulfane

Process for the production of polysulfide silane compounds

A process for the preparation of mixtures of organosilicon disulfanes with a high disulfane content includes first reacting finely divided sodium and sulfur in an organic solvent, and then reacting the resulting Na,S,, product further with a halogenoalkylalkoxysilane to give the desired product.

Process for the preparation of mixtures of organosilicon oligosulfanes containing a high proportion of organosilicon disulfanes

Organosilicon-disulfanes are prepared by decomposing organosilicon thiocyanates with an alkali metal alcoholate.

Process for the preparation of organosilicon-disulfanes

This invention relates to a process for reducing the sulfane chain length of bis(silylorganyl)polysulfanes, in which these compounds are reacted with an anhydrous sulfide and a haloalkylsilane compound.

Process for reducing the sulfane chain length of bis(silylorganyl)

Aqueous emulsions are disclosed containing organosilicon compounds for the impregnation of inorganic materials, in particular building materials, containing alkoxysilanes and silane surfactants. The aqueous emulsions are storage stable and are adjusted to pH of from 3 to 5.5 just prior to use.

Process for impregnating a building material with an organosilicon

Aqueous emulsions are disclosed containing organosilicon compounds for the impregnation of inorganic materials, in particular building materials, containing alkoxysilanes and silane surfactants. The emulsions comprise 1-80% by weight of one alkoxy silane, ##STR1## X.dbd.H,cl,Br, I, NH.sub.2, SCN, CN, N.sub.3, NHR, NR, NR.sub.3, --S.sub.x --, aryl or alkenyl

Aqueous emulsions containing organosilicon compounds for the

Mixtures of sulfurous triazine compounds and methods of preparing these compounds with the general formula ##STR1## in which R.sup.1, R.sup.2 =H,R.sup.2 =benzyl,

Mixtures of sulfurous triazine compounds

The invention is directed to a method of preparing sulfenic acid chlorides and sulfenic acid esters with hydrolyzable silyl groups in which an oligosulfane containing silyl groups is chlorinated, the sulfenic acid chloride produced is separated and converted by reaction with an alkali alcoholate to the corresponding sulfenic acid ester.

Method of preparing sulfenic acid chlorides and sulfenic acid esters

The invention is directed to N-silylpropyl-N'-acyl ureas and their production from an alkali cyanate, a 3-halopropylsilane and in a given case, a cyclic acidamide. By heating the compounds of the invention the blocked isocyanate function can be set free.

Growing community of inventors

Freigericht, Germany

Rudolf Michel