Abstract: The invention relates to core-shell particles, the shell of which includes aggregated, hydrophobicized silicon dioxide particles, and the core of which includes a liquid phase, and in which the ratio of aggregated, hydrobicized silicon dioxide particles to the liquid phase, based on the total weight of the particles, is 2:98 to 40:60, where 60-100% by weight of glycerol is present in the liquid phase. The invention further encompasses the production of these core-shell particles and also their use for cosmetic purposes.

Abstract: The invention relates to core-shell particles, the shell of which includes aggregated, hydrophobicized silicon dioxide particles, and the core of which includes a liquid phase, and in which the ratio of aggregated, hydrobicized silicon dioxide particles to the liquid phase, based on the total weight of the particles, is 2:98 to 40:60, where 60-100% by weight of glycerol is present in the liquid phase. The invention further encompasses the production of these core-shell particles and also their use for cosmetic purposes.

Abstract: The invention is directed to organosilicon compounds of the general formula prepared by reacting triazine compounds with functional groups (e.g., chlorine) and corresponding compounds (e.g., mercapto). The organosilicon compounds can be used in rubber mixtures.

Abstract: A process is disclosed for the preparation of anhydrous sodium sulfide by heating sodium sulfide having a water content of from 38 to 40% in a contact drier in vacuo, the temperature of the solid to be dried being increased from approximately 20° C. at the solid inlet to ≧180° C. at the solid outlet.

Abstract: 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.

Abstract: The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2Sx (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2− (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (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.

Abstract: Organosilicon compounds of general formula (I) R1R2R3Si—R4—S—Zn—S—R4—SiR1R2R3  (I) wherein R1, R2, R independently, represent H, a halogen, alkyl or alkoxy and R4 represents an alkylidene group, their preparation and their use in rubber mixtures.

Abstract: The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2SX (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2− (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (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.

Abstract: The invnetion is directed to organosilicon compounds of the general formula 1

Abstract: 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.

Abstract: Process for the production of polysulfide silane compounds of the general formula Z-R1-Sn-R1-Z  (I) wherein silylalkyl halides of the formula ZR1X  (II) are reacted with alkali metal polysulfides of the formula M2Sn,  (III) wherein alkali metal polysulfides M2Sn are obtained by reacting alkali metal hydroxides of the general formula (IV) MOH  (IV) and elemental sulfur in a non-aqueous solvent or without solvent.

Abstract: Process for the preparation of sulfur- and phosphorus-containing compounds of the formula: [R1n(R2O)3−n—Si—Alk—S—]3P═S in which halogen-containing silanes of the formula R1n(R2O)3−n—Si—Alk—Hal are reacted with phosphorus pentasulfide (P4S10) and a metal sulfide.

Abstract: 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 Na2Sx, product further with a halogenoalkylalkoxysilane to give the desired product.

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

Abstract: Mixtures are disclosed of bis(silylorganyl)polysulfanes and silylorganylthiocyanates, which are produced by reacting polysulfanes with cyanides. The inorganic thiocyanate formed is subsequently allowed to react with a haloalkylalkoxysilane to form the silylorganylthiocyanate. These substances are used in plastic and rubber mixtures reinforced with silica and optionally carbon black.

Abstract: The preparation of high-purity organosilicon disulphanes in which, in a two-stage process, elemental sulphur and an anhydrous alkali sulphide in a deficient amount is first reacted with a halogen alkylalkoxysilane, and the sulphur deficit is then made up by the addition of further alkali sulphide.

Abstract: A process for the production of bis(silylorganyl)-polysulphanes of the formula(R.sup.1 R.sup.2 R.sup.3 SiR.sup.4).sub.2 S.sub.x (I)in whichR.sup.1, R.sup.2, R.sup.3 : can be identical or different from each other, and are branched and unbranched alkyl and/or is an alkoxy groups with 1 to 8 cations, wherein at least one alkoxy group is present, aryl residues, in particular phenyl, toluyl, benzyl;R.sup.4 : means a divalent alkylidene residue having a chain length of 1-8 C atoms, or--(CH.sub.2).sub.n --C.sub.6 H.sub.4 --(CH.sub.2).sub.n --(n=1 to 4);by reacting haloalkylalkoxysilanes orhaloalkoxysilanes of the formulaR.sup.1 R.sup.2 R.sup.3 SiR.sup.4 X (II)with a polysulphide of the formulaM.sub.2 S.sub.x (III).In a first stage of the reaction, dehydrated polysulphide is obtained by reacting a sulphide hydrate containing water of crystallization with sulphur under a vacuum at a temperature of 60.degree. to 300.degree. C.

Abstract: Alkylalkoxysilyl-1,3-oxazolines, their production by reacting 2?-alkenyl!-1,3-oxazolines with alkylalkoxysilanes or cyano alkylene silane compounds with amino alcohols and the use of the compounds for modifying materials with siliceous surfaces.

Abstract: A process is disclosed for the selective synthesis of silylalkyldisulphides by desulphurization of the corresponding polysulphides using nucleophilic reagents.