Wacker Chemie Ag

Wacker Chemicalcorporation

Hartmut Ackermann

Holger Rautschek

Richard L Kirkpatrick

Volker Stanjek

Uwe Scheim

Rudolf Hager

Daniel J Mania

Robert Schroeck

Maria Augusta Dinelli Azevedo

Mike Coffey

Robert SCHRÖCK

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.

Method for the hydrophobic impregnation of fired ceramic molded bodies

The invention relates to cross-linkable compositions comprising

Cross-linkable masses based on organosilicon compounds

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 Cor greater alkyl group into water.

Aqueous dispersions of organosilicon compounds

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.

Non-yellowing low VOC mineral surface enhancer

Aqueous dispersions of organosilicon compounds contain:  The compositions are especially useful for the hydrophobing impregnation and mass hydrophobing of mineral and organic building materials.

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.

Method for producing organopolysiloxanes

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.

Building materials incorporated with hydrophobic silicone resin(s)

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.

Process for the preparation of organopolysiloxanes

The invention provides storage-stable compositions of organosilicon compounds which comprise and bear groups selected from hydroxyl groups bonded to silicon atoms and Cto Chydrocarboxy groups bonded to silicon atoms, where

Growing community of inventors

Burghausen, Germany

Hartmut Ackermann