Abstract: Fired clay moldings are hydrophobicized by applying a long chain alkyl-substituted alkoxysilane or hydrolysate thereof having up to 5 silicon atoms, and an alkoxy-functional silicone resin. The moldings, which may be roof tiles, are hydrophobicized to a significant depth, without discoloration.

Abstract: The invention relates to cross-linkable compositions comprising (A) organosiloxanes consisting of units RcSiO4-c/2??(I) and R5(OR4)mSiO3-m/2??(II), (B) silanes R5Si(OR4)3??(II) and/or partial hydrolysates thereof in amounts of 5 to 20 parts by weight, based on 100 parts by weight of component (A), (C) organosiloxanes consisting of units R6a(R7O)bSiO(4-a-b)/2??(IV) in amounts of 1 to 30 parts by weight, (D) organosilicon compounds comprising units of the formula DfSi(OR9)eR8dO(4-d-e-f)/2??(V), in amounts of 0.1 to 2 parts by weight. The compositions are particularly useful as anti-graffiti coating.

Abstract: The invention relates to cross-linkable compositions comprising (A) organosiloxanes consisting of units RcSiO4-c/2??(I) and R5(OR4)mSiO3-m/2??(II), (B) silanes R5Si(OR4)3??(II) and/or partial hydrolysates thereof in amounts of 5 to 20 parts by weight, based on 100 parts by weight of component (A), (C) organosiloxanes consisting of units R6a(R7O)bSiO(4-a-b)/2??(IV) in amounts of 1 to 30 parts by weight, (D) organosilicon compounds comprising units of the formula DfSi(OR9)eR8dO(4-d-e-f)/2??(V), in amounts of 0.1 to 2 parts by weight. The compositions are particularly useful as anti-graffiti coating.

Abstract: Fired clay moldings are hydrophobicized by applying a long chain alkyl-substituted alkoxysilane or hydrolysate thereof having up to 5 silicon atoms, and an alkoxy-functional silicone resin. The moldings, which may be roof tiles, are hydrophobicized to a significant depth, without discoloration.

Abstract: Stable aqueous organosilicon dispersions particularly useful for the hydrophobing of construction materials are prepared by first preparing a homogenous mixture of organopolysiloxanes and hydrophobic silica filler, and dispersing this mixture together with an alkylalkoxysilane bearing at least one C4 or greater alkyl group into water.

Abstract: Stable aqueous organosilicon dispersions particularly useful for the hydrophobing of construction materials are prepared by first preparing a homogenous mixture of organopolysiloxanes and hydrophobic silica filler, and dispersing this mixture together with an alkylalkoxysilane bearing at least one C4 or greater alkyl group into water.

Abstract: Low VOC mineral surface enhancer compositions are non-yellowing and contain a condensable aminoorgano-functional organopolysiloxane fluid, a condensable organopolysiloxane resin, and a condensation catalyst. The compositions provide a durable, color enhancing wet look to mineral surfaces to which they are applied.

Abstract: Aqueous dispersions of organosilicon compounds contain: (A) as at least one organosilicon compound, (A1) silanes of the formula RaR2bSi(OR1)4-a-b??(I) and/or the partial hydrolysis products thereof and/or (A2) siloxanes containing units R3c(R4O)dSiO(4-c-d)/2??(II) (B) at least one nonionic emulsifier having an HLB value greater than or equal to 12, optionally as a mixture with nonionic emulsifiers having an HLB value of less than 12, (C) at least one cationic surfactant (C1) R9eR6(4-e)N+X???(III) and/or (C2) (D) water. The compositions are especially useful for the hydrophobing impregnation and mass hydrophobing of mineral and organic building materials.

Abstract: Low VOC mineral surface enhancer compositions are non-yellowing and contain a condensable aminoorgano-functional organopolysiloxane fluid, a condensable organopolysiloxane resin, and a condensation catalyst. The compositions provide a durable, color enhancing wet look to mineral surfaces to which they are applied.

Abstract: Organopolysiloxanes are prepared in a multistage process by a first partial hydrolysis with from 0.002 to 0.6 mol water per hydrolyzable chlorine and alcohol at a water to alcohol ratio of 0.001 to 1.5, then further hydrolyzing with additional water, and then separating an aqueous alcoholic phase from an organopolysiloxane phase.

Abstract: An inorganic matrix building material with enhanced water impermeability is prepared by curing an inorganic curable matrix and at least one particulate hydrophobic silicone resin substantially uniformly incorporated within the matrix, the at least one hydrophobic silicone resin being selected from the group consisting of a TD resin, an MQ resin, an MT resin, an MQT resin, and combinations thereof. In certain particular instances, the at least one hydrophobic silicone resin is a TD resin. The curing takes place at elevated temperature, optionally at elevated pressure.

Abstract: A continuous process for the preparation of organopolysiloxanes involves, in a first step, reacting chlorosilanes with from 0.01 to 0.7 mol of water per mole of hydrolyzable chlorine and with from 0.2 to 1.7 mol of alcohol per mole of hydrolyzable chlorine, the molar ratio of water to alcohol being from 0.005 to 3.5; in a second step, the reaction mixture obtained in the first step is optionally mixed continuously with a water-insoluble organic solvent having a density of less than 0.9 kg/l, and water is metered in continuously in amounts of from 0.2 to 100 mol of water per mole of silicon component; and in a third step, the aqueous alcoholic phase is separated off.

Abstract: An inorganic matrix building material with enhanced water impermeability is prepared by curing an inorganic curable matrix and at least one particulate hydrophobic silicone resin substantially uniformly incorporated within the matrix, the at least one hydrophobic silicone resin being selected from the group consisting of a TD resin, an MQ resin, an MT resin, an MQT resin, and combinations thereof. In certain particular instances, the at least one hydrophobic silicone resin is a TD resin. The curing takes place at elevated temperature, optionally at elevated pressure.

Abstract: Aqueous dispersions of organosilicon compounds contain: (A) as at least one organosilicon compound, (A1) silanes of the formula RaR2bSi(OR1)4-a-b ??(I) and/or the partial hydrolysis products thereof and/or (A2) siloxanes containing units R3c(R4O)dSiO(4-c-d)/2 ??(II) (B) at least one nonionic emulsifier having an HLB value greater than or equal to 12, optionally as a mixture with nonionic emulsifiers having an HLB value of less than 12, (C) at least one cationic surfactant (C1) R9cR6(4-e)N+X???(III) and/or (C2) (D) water, and optionally (E) other conventional components. The compositions are especially useful for the hydrophobing impregnation and mass hydrophobing of mineral and organic building materials.

Abstract: Organopolysiloxanes are prepared in a multistage process by a first partial hydrolysis with from 0.002 to 0.6 mol water per hydrolyzable chlorine and alcohol at a water to alcohol ratio of 0.001 to 1.5, then further hydrolyzing with additional water, and then separating an aqueous alcoholic phase from an organopolysiloxane phase.

Abstract: A continuous process for the preparation of organopolysiloxanes involves, in a first step, reacting chlorosilanes with from 0.01 to 0.7 mol of water per mole of hydrolyzable chlorine and with from 0.2 to 1.7 mol of alcohol per mole of hydrolyzable chlorine, the molar ratio of water to alcohol being from 0.005 to 3.5; in a second step, the reaction mixture obtained in the first step is optionally mixed continuously with a water-insoluble organic solvent having a density of less than 0.9 kg/l, and water is metered in continuously in amounts of from 0.2 to 100 mol of water per mole of silicon component; and in a third step, the aqueous alcoholic phase is separated off.

Abstract: Liquid organopolysiloxanes comprising units of the general formula RaXbSiO(4-a-b)/2??(I), where R is a hydrocarbon group, X is halogen or an alkoxy group, and b is 0-3, with the proviso that the sum a +b is ?3, a is 1 in at least 50% of the units of the organopolysiloxane and the organopolysiloxanes are liquid at 20° C. and a pressure of from 900 to 1100 hPa.

Abstract: The invention provides storage-stable compositions of organosilicon compounds which comprise (A) organosilicon compounds which are selected from silanes (A1) of the formula 1 RxSi(OR1)4?x??(1) and resinous organopolysiloxanes (A2) which contain units of the formula R a ? ( R 1 ? O ) y ? ? Si ? ? O 4 - ( a + y ) 2 ( 2 ) and bear groups selected from hydroxyl groups bonded to silicon atoms and C1 to C18 hydrocarboxy groups bonded to silicon atoms, where R is a hydrogen atom or monovalent SiC-bonded, optionally substituted C1-18 hydrocarbon radicals, R1 is a hydrogen atom or monovalent SiC-bonded, optionally substituted C1-18 hydrocarbon radicals, x is 0, 1, 2 or 3, a is 0 or 1 and y is 1, 2 or 3, and (B) from 1 to 499 ppm by weight, based on the organosilicon compounds (A), of at least one amino-containing compound.

Abstract: The invention provides storage-stable compositions of organosilicon compounds which comprise (A) organosilicon compounds which are selected from silanes (A1) of the formula 1 RxSi(O R1)4?x??(1) and resinous organopolysiloxanes (A2) which contain units of the formula R a ? ( R 1 ? O ) y ? ? ? Si ? ? ? O 4 - ( a + y ) 2 ( 2 ) and bear groups selected from hydroxyl groups bonded to silicon atoms and C1 to C18 hydrocarboxy groups bonded to silicon atoms, where R is a hydrogen atom or monovalent SiC-bonded, optionally substituted C1-18 hydrocarbon radicals, R1 is a hydrogen atom or monovalent SiC-bonded, optionally substituted C1-18 hydrocarbon radicals, x is 0, 1, 2 or 3, a is 0 or 1 and y is 1, 2 or 3, and (B) from 1 to 499 ppm by weight, based on the organosilicon compounds (A), of at least one amino-containing compound.