Wacker-chemie Gmbh

Wacker Chemie Ag

Fridolin Stary

Manfred Heisler

Alois Schlierf

Johann Schuster

Karl-Heinrich Wegehaupt

Karl Braunsperger

Harald Voit

Gunter Von Au

Steffen Dörrich

Martin Petri

Erich Schaffer

Verena Geiger

Rudolf Ratka

Peter Kremer

The invention provides a process for removal of gaseous decomposition products from high temperature heat transfer fluid HTF of an operational solar thermal power plant having an HTF circuit,

Composite heat insulation system

A process for preparing organopolysiloxane compositions (A) having a viscosity measured at 25&#xb0; C. of at least 500 Pa&#xb7;s., wherein organopolysiloxanes (O) and fillers (F) are mixed and kneaded in a first process stage in a kneading cascade having at least two kneading chambers arranged in series adjacent one another, each containing kneading tools having parallel axes and capable of being driven in co-rotating or counter-rotating directions, the chambers connected to one another by means of openings through which material can pass in a direction transverse to the axes of the kneading tools, with the first kneading chamber having a feed opening and the last kneading chamber having a discharge opening, to give raw mixtures, and the raw mixtures are kneaded and degassed in a reciprocating kneader in a second process stage.

Process for the continuous preparation of high-viscosity silicone compositions

Process for the continuous preparation of HTV silicone compositions

A process for preparing diorganopolysiloxanes having terminal Si-bonded hydroxyl groups which comprises reacting an organosilicon compound selected from a cyclic diorganopolysiloxane, a diorganodichlorosilane hydrolysis product and mixtures thereof with from 0.1 to 3 percent by weight of a diorganodichlorosilane, based on the weight of the organosilicon compound, i.e., the cyclic diorganopolysiloxane and/or diorganodichlorosilane hydrolysis product employed, in the presence of from 1 to 50 ppm by weight of phosphonitrile chloride, based on the total weight of the organosilicon compound and diorganodichlorosilane employed, to form diorganopolysiloxanes containing an Si-bonded chlorine atom in each of the terminal units, then treating the reaction mixture with water or an aqueous solution, separating off the aqueous phase from the diorganopolysiloxanes containing an Si-bonded hydroxyl group in each of the terminal units and thereafter removing the low boiling constituents by distillation.

Process for preparing diorganopolysiloxanes having terminal Si-bonded

A process for producing room temperature-vulcanizable silicone compositions which comprises mixing, in a first step, crosslinkable diorgano(poly)siloxanes, filler(s) and either catalyst(s) or crosslinking agent(s) and a part or all of the optional additives to be used in a continuusly operating closed mixer, and in a second step, metering the crosslinking agents and/or catalyst(s) not added in the first step and the remainder of the optional additivies to be used into the mixture thus obtained in an oscillating pilgrim-step kneader where the mixture is homogenized and degassed.

Process for the continuous production of room temperature-vulcanizable

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Burghausen, Germany

Fridolin Stary