Abstract: Mercaptosilanes are disclosed of the formula I wherein R1 is an alkyl polyether group —O—(R5—O)m—R6. They are prepared by a procedure in which a silane of the formula II is subjected to a catalyzed reaction with an alkyl polyether R1—H, R7—OH being split off, the molar ratio of the alkyl polyethers R1—H to the silane of the formula II is at least 0.5 and R7—OH is separated off from the reaction mixture continuously or discontinuously. They can be used in shaped articles.

Abstract: A composition containing organosilicon compounds having the formula I and/or II wherein R is ethyl, R1 is a mixture such that the proportion of one component of the mixture is 10 to 50 mol % and is the same or different C9-C30 branched or unbranched monovalent alkyl, and R2 is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C1-C30 hydrocarbon is produced by reacting silanes having the formula III with mixtures of alcohols having the general formula R1—OH, with elimination of R—OH, and R—OH is continuously separated off from the reaction mixture by distillation. The organosilicon compounds can be used in rubber compounds.

Abstract: 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.

Abstract: Organosilicon compounds of the general formula I are produced by catalytically reacting silanes of the general formula II with alcohols of the general formula R?—OH, with the elimination of RIVOH, wherein the molar ratio of R—OH to RIVOH— groups is at least 1 and RIVOH is removed continuously or discontinuously from the reaction mixture. The organosilicon compounds may be used as coupling agents in filler-reinforced rubber mixtures.

Abstract: The invention is directed to rubber mixtures comprising rubber, fillers, optionally further rubber auxiliaries and at least one organosilane of the general formula I: R1R2R3SiR4—SH??(I) wherein: R1 is methyl or ethyl, R2 is methoxy, ethoxy or —O—(Y—O)m—X where Y=a branched or unbranched, saturated or unsaturated divalent hydrocarbon group, X is a C1- to C9-alkyl group and m=1-40, R3 is methyl, ethyl or R2, and R4 is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C1-C12 hydrocarbon group. The rubber mixtures according to the invention are prepared by mixing rubber, filler, optionally further rubber auxiliaries and at least one organosilane of the general formula I. The rubber mixtures can be used for the production of shaped articles.

Abstract: The invention concerns a process for producing mercaptoorganyl(alkoxysilanes), wherein bis(alkoxysilylorganyl)polysulfides are hydrogenated at temperatures of <190° C. and pressures of <100 bar with hydrogen and a transition metal catalyst without the addition of water, alcohol or H2S.

Abstract: The invention relates to a process for the preparation of mercaptoorganyl(alkoxysilanes), wherein bis(alkoxysilylorganyl)polysulfides are hydrogenated with hydrogen and a transition metal catalyst in a solvent without the addition of alcohols, H2S or water.

Abstract: Silane-modified oxidic or siliceous filler with a bead fraction below 75 ?m of less than 15 wt. % and a median particle size distribution between of 150 to 500 ?m, which is produced by the reaction of at least one microbeaded or microgranular, oxidic or siliceous filler in a compressed gas with at least one silane. The silane-modified oxidic or siliceous fillers are used in rubber compounds.

Abstract: 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.

Abstract: Organosilicon compounds having the formula I and/or II wherein R1 is a mixture and the proportion of one component of the mixture is 10 to 50 mol %, are produced by reacting silanes having the formula III with mixtures of alcohols having the general formula R1—OH, with elimination of R—OH, and R—OH is continuously separated off from the reaction mixture by distillation. The organosilicon compounds can be used in rubber compounds.

Abstract: Mercaptosilanes are disclosed of the formula I wherein R1 is an alkyl polyether group —O—(R5—O)m—R6. They are prepared by a procedure in which a silane of the formula II is subjected to a catalyzed reaction with an alkyl polyether R1—H, R7—OH being split off, the molar ratio of the alkyl polyethers R1—H to the silane of the formula II is at least 0.5 and R7—OH is separated off from the reaction mixture continuously or discontinuously. They can be used in shaped articles.

Abstract: The invention is directed to rubber mixtures comprising rubber, fillers, optionally further rubber auxiliaries and at least one organosilane of the general formula I: R1R2R3SiR4—SH??(I) wherein: R1 is methyl or ethyl, R2 is methoxy, ethoxy or —O—(Y—O)m—X where Y=a branched or unbranched, saturated or unsaturated divalent hydrocarbon group, X is a C1- to C9-alkyl group and m=1-40, R3 is methyl, ethyl or R2, and R4 is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C1-C12 hydrocarbon group. The rubber mixtures according to the invention are prepared by mixing rubber, filler, optionally further rubber auxiliaries and at least one organosilane of the general formula I. The rubber mixtures can be used for the production of shaped articles.

Abstract: The invention concerns a process for producing mercaptoorganyl(alkoxysilanes), wherein bis(alkoxysilylorganyl)polysulfides are hydrogenated at temperatures of <190° C. and pressures of <100 bar with hydrogen and a transition metal catalyst without the addition of water, alcohol or H2S.

Abstract: The invention relates to a process for the preparation of mercaptoorganyl(alkoxysilanes), wherein bis(alkoxysilylorganyl)polysulfides are hydrogenated with hydrogen and a transition metal catalyst in a solvent without the addition of alcohols, H2S or water.

Abstract: Organosilicon compounds of the general formula I 1

Abstract: Abstract Organosilicon compounds having the formula I and/or II 1

Abstract: Silane-modified oxidic or siliceous filler with a bead fraction below 75 &mgr;m of less than 15 wt. % and a median particle size distribution between of 150 to 500 &mgr;m, which is produced by the reaction of at least one microbeaded or microgranular, oxidic or siliceous filler in a compressed gas with at least one silane. The silane-modified oxidic or siliceous fillers are used in rubber compounds.

Abstract: A method for the dry cationization of starch is disclosed by means of reaction with alkylene epoxides in an alkaline medium in the presence of water.

Abstract: A method is disclosed for the dry cationization of galactomannans by means of reaction with alkylene epoxides in an alkaline medium in the presence of water at 5.degree. to 60.degree. and in the presence of a finely divided, hydrophilic silica.