Abstract: Processes for preparing aminosiloxanes.

Abstract: A methylpolysiloxane mixture along with uses and methods for operating a solar thermal power station (or CSP plant) utilizing the same. The use for the methylpolysiloxane mixture includes providing a mixture (a) wherein the methylpolysiloxane mixture includes a linear methylpolysiloxanes MDxM, wherein x is an integer with 0?x?100, and wherein the mixtures have a molar M:D ratio of 1:15.5 to 1:30; or (b) wherein the methylpolysiloxane mixture includes a linear methylpolysiloxanes MDxM, wherein x is an integer with 0?x?80 and cyclic dimethylpolysiloxanes Dy where y is an integer?3, wherein the sum of the fractions of all cyclic dimethylpolysiloxanes Dy is 10-95 wt %, and wherein the mixtures have a molar M:D ratio of 1:10.5 to 1:30. The methylpolysiloxane mixture is used as a heat transfer fluid in a CSP plant with operating temperatures in a range of 300 to 500° C.

Abstract: Alkyl-silicates and alkyl-silicate-containing organosilicon compounds. The alkyl-silicate-containing organosilicon compound includes at least 90% by weight, preferably at least 95% by weight, of alkyl silicates of average formula (I) Where the radicals Rx are each independently selected from radicals that meet at least one of the following conditions: (a) where Rx is a substituted or unsubstituted, C4-C20 hydrocarbon radical that is branched at the ?-carbon atom, (b) where Rx is a substituted or unsubstituted, C5-C20 hydrocarbon radical that is doubly branched at the ?-carbon atom, and/or (c) where Rx is an unsubstituted or alkyl-substituted cyclopentyl, cyclohexyl or cycloheptyl radical having a total of not more than 9 carbon atoms. Where the radicals R3 are each independently selected from (i) hydrogen, (ii) methyl radical, and (iii) ethyl radical.

Abstract: A silirane-functionalized compound, a process for preparing the same, and a process for preparing siloxanes using a silirane-functionalized compound are described herein.

Abstract: A process for dehydrogenating and methylating silanes. The process includes providing methyl chloride that is reacted with a silane selected from the group consisting of SiH4, H2SiMe2, H2SiMeCl, H3SiMe, H3SiCl and HSiMe2Cl, in the presence of at least one ammonium and/or phosphonium salt at a temperature in the range of 70-350° C.

Abstract: A perfluorophenyl azide containing siloxane oligomer mixture along with products made therefrom, uses for the same, methods for preparing and methods for curing the same.

Abstract: A silirane-functionalized compound that consists of a substrate to which a least two silirane groups of the formula (1) are covalently bonded, a mixture containing the silirane-functionalized compounds, and a process for preparing siloxanes using the mixture are described herein.

Abstract: A hydrolysable mixture M contains a) at least one compound A with at least one hydrogen atom directly bonded to a silicon atom, b) at least one compound B that contains at least one carbon-carbon multiple bond, c) at least one hydrosilylation catalyst, and d) at least one strong electron donor, as a catalyst additive.

Abstract: A process for preparing trimethylchlorosilane (M3) and methyltrichlorosilane (M1) by disproportionation of dimethyldichlorosilane (M2) in the presence of an Al2O3 catalyst is described herein. The dimethyldichlorosilane used is in the form of a silane mixture that includes 80-100% by weight of dimethyldichlorosilane (M2). The difference in content from 100% by weight includes M1 and M3.

Abstract: The invention relates to a method for producing hydrophilic silicia moulded bodies, in which i) a mixture containing hydrophilic silicic acid is added at a maximum temperature of 55° C. to hydrophobic means and ii) the mixture obtained in step i) is compacted after a maximum storage time of 30 days to form moulded bodies, iii) during steps ii and iii and until the moulded bodies are used, the temperature is at a maximum of 55° C.

Abstract: A mixture M includes at least one compound A selected from (a1) a compound of the general formula (I): R1R2R3Si—H, and/or (a2) a compound of the general formula (I?): (SiO4/2)a(RxSiO3/2)b(HSiO3/2)b?(Rx2SiO2/2)c(RxHSiO2/2)c?(H2SiO2/2)c?(Rx3SiO1/2)d(HRx2SiO1/2)d?(H2RxSiO1/2)d?(H3SiO1/2)d??, and at least one compound B selected from (b1) a compound of the general formula (II): R4R5R6Si—O—R7, and/or (b2) a compound of the general formula (II?): Rx3Si—O[—SiRx2—O]m—[Si(OR73)Rx—O]n—SiRx3, and at least one compound C selected from the cationic germanium(II) compound of the general formula (III): ([Ge(II)Cp]+)aXa?.

Abstract: Aminopropylalkoxysilanes of the formula H2N—CR2R3—CHR1—CH2—SiR4R5(OR6)??I, are synthesized by hydrosilylating silazanes of the formulae and mixtures thereof, in the presence of a catalyst containing rhodium and/or iridium compounds, and then reacted with alcohol to form an aminopropylalkoxysilane.

Abstract: A mixture M includes at least one compound A, selected from (a1) a compound of the general formula (I) and/or (a2) a compound of the general formula (I?), at least one compound B, selected from (b1) a compound of the general formula (II) and/or (b2) a compound of the general formula (II?) and/or (b3) a compound of the general formula (II?), and at least one compound C, selected from cationic germanium(II) compounds of the general formula (III).

Abstract: Granular and/or shaped hydrophobic silica useful for thermal insulation materials are prepared by mixing hydrophilic silica with a hydrophobicizing agent at low temperature so the hydrophobicizing agent does not appreciably react, followed by deaeration and compaction.

Abstract: Siloxanes are prepared by reacting: a compound A with a compound B or a compound A with a compound C or a compound B with a compound C or a compound C alone, in the presence of a compound D at ?40° C., wherein compound A is a silane or a siloxane having at least one silicon-bonded hydrogen atom, compound B is a silane or a siloxane having at least one silicon-bonded alkoxy moiety, compound C is a silane or a siloxane having at least one silicon-bonded hydrogen atom and at least one silicon-bonded alkoxy moiety, and compound D is a cationic Si(II) compound.

Abstract: Branched organopolysiloxanes and organopolysiloxanes with low alkoxy content are produced in a first reaction unit by continuous feed of organohalosilanes and alcohol to a reaction vessel surmounted by a distillation column, the vessel containing an excess of water relative to the halogen content of the organohalosilanes. A second reaction unit for removing volatiles from the product from the first reaction unit is also preferably employed.

Abstract: Branched organopolysiloxanes and organopolysiloxanes with low alkoxy content are produced in a first reaction unit by continuous feed of organohalosilanes and alcohol to a reaction vessel surmounted by a distillation column, the vessel containing an excess of water relative to the halogen content of the organohalosilanes. A second reaction unit for removing volatiles from the product from the first reaction unit is also preferably employed.

Abstract: Aminopropylalkoxysilanes of the formula H2N—CR2R3—CHR1—CH2—SiR4R5(OR6) ??I, are synthesized by hydrosilylating silazanes of the formulae and mixtures thereof, in the presence of a catalyst containing rhodium and/or iridium compounds, and then reacted with alcohol to form an aminopropylalkoxysilane.

Abstract: The invention provides circular processes using siloxanes as high-temperature heat transfer fluid (HTF), wherein the siloxanes go over from the state of the supercooled liquid into the state of the high-density supercritical fluid by means of heat uptake without a phase transition and energy is then transferred as energy without a phase transition.

Abstract: Silicone heat transfer fluids having a narrow range of M:D units and a specified proportion of cyclic siloxanes are able to be used at heat transfer fluids at high temperatures without reaching a supercritical state.