Abstract: 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?)Si—RI]2—Sm??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.

Abstract: 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?)Si—R1—Hal. The rubber mixtures can be used for production of mouldings.

Abstract: 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 mouldings. Also disclosed is a process for preparation of the organosilicon compound of the formula I via transesterification.

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: 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 Me2S, alkali metal polysulphide Me2Sg and any desired combinations thereof, and optionally additionally with sulphur and/or with H2S, in an alcohol, the Me2S or Me2Sg containing more than 10% by weight of water and the alkali metal hydrogen sulphide containing more than 3% by weight of water.

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

Abstract: Corrosion protection on metals The present invention relates to a coating on a metal to protect against corrosion, comprising the following layer sequence: (i) metal surface, (ii) layer based on a sol containing silicon compounds, (iii) layer based on at least one organosilane, (iv) if desired, one or more coating films. The present invention further relates to a process for producing such a coating and to the use thereof.

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: 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?)Si—RI]2—SmI 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.

Abstract: The present invention relates to a device for accomplishing noise reduction in a photoacoustic gas detector using a sound damping element and/or a background or reference microphone where a preferably larger external volume that acts as a sound damping element (SDE) is coupled to a smaller volume through which the gas diffuses. The coupling is accomplished in such a way that the externally generated sound waves incident upon the photoacoustic detector are adequately attenuated by the larger volume SDE without adversely affecting diffusion of the gaseous species of interest through the smaller volume for measurement by the detector. Preferably this is accomplished by coupling the larger SDE volume to the smaller gas diffusion volume by a long and thin pressure channel.

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

Abstract: The present invention relates to a composition for coating metals to protect against corrosion, comprising (i) a sol based on silicon compounds, (ii) at least one aminoalkyl-functional alkoxysilane and/or (iii) at least one reaction product of components (i) and (ii), the amount of aminoalkyl-functional silane component from (ii) and (iii) being in total from 0.01 to 15% by weight, calculated as the particular aminoalkylalkoxysilane used and based on the SiO2 content of the sol as per (i); to a process for preparing such a composition, and to its use.

Abstract: Rubber mixtures containing at least one rubber and an organosilicon compound of the general formula (I) (Q-)kG-Si(—O—CX1X2—CX1X3—)3N. 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 mouldings.

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: 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 Me2S, alkali metal polysulphide Me2Sg and any desired combinations thereof, and optionally additionally with sulphur and/or with H2S, in an alcohol, the Me2S or Me2Sg containing more than 10% by weight of water and the alkali metal hydrogen sulphide containing more than 3% by weight of water.

Abstract: The present invention relates to a coating on a metal to protect against corrosion, comprising the following layer sequence: (i) metal surface, (ii) layer based on a sol containing silicon compounds, (iii) layer based on at least one organosilane, (iv) if desired, one or more coating films. The present invention further relates to a process for producing such a coating and to the use thereof.

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.