Wacker-chemie Gmbh

Wacker Chemie Ag

Otto Schneider

Johann Schuster

Rudolf Hager

Bernward Deubzer

Horst Muller

Ludwig Hager

Uwe Scheim

Holger Rautschek

Willibald Burger

Karl Braunsperger

Konrad Alfons Wierer

Peter Schoeley

Tassilo Lindner

Rudolf Braun

Robert Schroeck

Norbert Gamon

Martin Piehler

Burkhard Grune

Thomas Hohberg

Helmut Huber

Ralf Kratschmera

Peter Schöley

Wilhelm Hilgert

Wilhelm Zadny

Gerhard Lwowski

Robert SCHRÖCK

Fiberfill fibers are treated with aqueous dispersions of organopolysiloxanes obtained by reaction of condensation-curable organopolysiloxanes with silanes(RO)SiCR&#x2014;Y

Treatment of fiberfill fibers with aqueous dispersions of organopolysiloxanes

Two or multi-component condensation curing compositions can be cured in deep sections with low shrinkage, yet require no tin catalysts, or a significantly reduced tin catalyst level.

Cross-linkable masses based on organosilicon compounds

Defoamer compositions which exhibit both high defoaming activity as well as good storage stability are prepared by mixing at least an organopolysiloxane having a defined but limited fraction of silicon-bonded hydroxyl and/or alkoxy groups and hydrophilic silica, followed by heating until the viscosity of the mixture has fallen to less than 50% of its value prior to heating.

Method for the production of defoamer formulations

Highly concentrated oil-in-water aqueous emulsions of nitrogen-containing organopolysiloxanes are prepared by dispersing the organopolysiloxanes in water without substantial addition of acid, to form a flowable, dilutable, storage stable emulsion containing 45 weight percent or more organopolysiloxane and a pH of at least 7.5.

Highly concentrated oil-in-water silicone emulsions

Organosilicon emulsions of improved quality are prepared batchwise in a circulating loop containing a high shear mixer, while controlling the temperature and pressure within the loop.

Method for the discontinuous production of silicone emulsions

The invention relates to a process for altering the viscosity of organopolysiloxanes, wherein clay which has been treated with mineral acid and subsequently heated to from 250.degree. C. to 1200.degree. C. is used as catalyst. In the process, only small amounts of volatile siloxanes, in particular only small amounts of cyclic molecules, are formed.

Process for altering the viscosity of organopolysiloxanes

The invention relates to a method for preparing homogeneous dispersions of fluidizable bulk materials, wherein, in a first step, fluidizable bulk materials are blended with liquid to produce a raw dispersion and, in a second step, the raw dispersion is conveyed through a continuous enclosed dispersing apparatus by means of a forced-conveyance apparatus.

Homogenization of dispersions

The invention relates to a process for stabilizing organopolysiloxanes which contain phosphazenes and/or their reaction products which promote the condensation and/or equilibration of organopolysiloxanes. To stabilize any previously known organopolysiloxanes which contain phosphazenes and/or their reaction products against re-arrangements and also molecular weight changes and viscosity changes resulting therefrom, it is proposed that the said phosphorus compounds be brought into contact with at least one non-basic, solid adsorbent.

Process for stabilizing organopolysiloxanes

The present invention relates to oxygen-containing chlorophosphazenes containing organosilicon radicals, in particular those of the formula

Phosphazenes containing organosilicon radicals, process for their

A process for the condensation and/or equilibration of organosilicon compounds in the presence of oxygen-containing phosphazenes, in particular those of the formula

Process for the condensation and/or equilibration of organosilicon

A process for purifying organopolysiloxanes, which comprises treating organopolysiloxanes after their preparation with an elemental metal. Impurities which are related to the preparation of organopolysiloxanes and cause changes in color, in particular during storage under the influence of heat, subsequent clouding, inhibition of catalysts, a lack of heat stability, a lack of dielectric strength or the formation of odors, especially after exposure to light, are removed by the process of this invention.

Process for the purification of organopolysiloxanes

The present invention relates to compositions containing phosphonitrile chlorides and/or compositions thereof containing reaction products which accelerate the condensation and/or equilibration of organo(poly)siloxanes, halogen-free organic solvents and solubilizers and the use of such compositions in the condensation and/or equilibration of organo(poly)siloxanes.

Compositions containing phosphonitrile chlorides

The invention relates to a process for purifyng crude gaseous hydrogen chloride originating from plants producing silane or siloxane and containing as impurities silanes which contain chlorine and/or organic radicals, water, alkanols, hydrocarbons, chlorinated hydrocarbons, organic acids and derivatives thereof, by condensation, compression and fractional distillation. In this process, the crude gas is at least partially freed from condensable products by cooling to -35.degree. C., then compressed in a screw compressor with oil injection to 1.5 MPa, the oil is separated off, freed from gel-containing residues through a filter web and again recycled into the compressor. The compressed hydrogen chloride gas is fractionated in a distillation column under pressure and hydrogen chloride having a purity of 99.999 percent is recovered.

Process for purifying crude gaseous hydrogen chloride

Aqueous silicone dispersions containing (a) polydiorganosiloxanes having hydroxyl groups in the terminal units, (b) (organo)metallic compound(s), (c) a siliconate, and optionally, (d) a silicone resin. These aqueous silicone dispersions will cure to form elastomeric coatings or sealants when the water is removed by evaporation.

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Burghausen, Germany

Otto Schneider