Wacker-Chemie Gmbh

Wacker Chemie Ag

Willibald Burger

Holger Rautschek

Christian Herzig

Josef Wimmer

Peter Huber

Ludwig Esterbauer

Bernward Deubzer

Richard Becker

Michael Geck

Christof Brehm

Ernst Innertsberger

Martina Joachimbauer

Wolfgang Ziche

Hans Mayer

Franz X Wimmer

Otto Schneider

Hans Lautenschlager

Joachim Schulze

Gunter Pusch

Jakob Schmidlkofer

Elisabeth Hoelzlwimmer

Martina Bloechl

Kai-Udo Sewe

Robert Schr&ouml;ck

Jaroslav G Koval

Erika Zscheile

Serguei V Goussevt

Kimmo Lappalainen

Piotr Meschkov

Outi Neubig

Christine Wolf

Vladimir V Mazajev

Hannu Wahlberg

Rudiger Meyn

Günter Mahr

Holger W&ouml;ltje

Wendelin Dewenter

Martina Blochl

Elisabeth HÖLZLWIMMER

Defoamer compositions containing a plurality of defined organopolysiloxanes exhibit very short initial foam collapse and yet exhibit long lasting defoaming activity when added to aqueous media prone to foaming.

Defoaming formulations containing organopolysiloxanes

A mixture of unique organopolysiloxane, filler, and additional components are effective defoamers and may be used neat, or in the form of a powder or emulsion.

Defoamer formulations comprising organopolysiloxanes

Effective and long lasting defoamer compositions are prepared by admixing an organopolysiloxanes, a hydrophilic silica, a hydrophobic silica, optionally an organopolysiloxanes resin, and optionally a water insoluble inorganic compound, at a temperature of 50&#xb0; C. to 250&#xb0; C. until the viscosity of the composition has decreased to at least half its original viscosity prior to heating.

Method for producing antifoam compositions

Efficient deaeration of aqueous suspensions such as those obtained during textile treatment or pulp and paper production is achieved by use of a combination of a polyoxypropylene polyether polymer or copolymer and branched polyether-polysiloxane copolymers.

Method for deaerating liquids

Superior defoamer compositions contain a low viscosity linear organopolysiloxane, a higher viscosity, optionally branched organopolysiloxane, a polyethersiloxane with a low cloud point, and both colloidal silica and fumed silica.

Antifoam compositions comprising a mixture of organopolysiloxanes

(A) Siloxane-based antifoams and (B) silicone polyethers prepared by reacting organopolysiloxanes (1) containing 0.05% to 1.6% by weight of Si-bonded hydrogen atoms

Defoamer formulations

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

Defoamer compositions of high effectiveness containing at least one siloxane-based antifoam and polysiloxane copolymers obtained by coupling a polysiloxane bearing active-hydrogen-containing hydrophilic polymer moieties by means of a di- or polyisocyanate.

Defoaming compositions employing organopolysiloxanes bearing aryl radicals exhibit surprising efficiency relative to their alkyl counterparts.

Anti-foam compositions

Oil-in-water emulsions of aminosiloxanes

Antifoam formulations

Antifoam formulation

In a process for extracting cellulose from fibrous materials such as wood, the fibrous materials are reacted with a chemical disintegration solution in the presence of organosilicic compounds.

Chemical digestion process using organosiloxane compounds

The invention relates to a method for stabilizing the gas flow in water-bearing natural gas deposits or reservoirs which produce at least 50 l of water per 1000 m,(Vn) of extracted natural gas. According to the method, a dispersion comprising the following components is injected into the water-bearing rock: A) an organosilicon compound as the dispersed phase; B) a hydrophilic dispersion agent, which can be mixed with water, and, if needed, C) a dispersing additive.

Method for stabilizing the gas flow in water-bearing natural gas deposits or reservoirs

The gas flow in water-containing natural gas wells and natural gas storage wells is improved if a homogeneous phase comprising a water-repellent, solvolysis-resistant active compound is injected into the water-bearing rock.

Process for treating water-containing natural gas wells and natural gas storage wells

Growing community of inventors

Burghausen, Germany

Willibald Burger