Abstract: A method is for processing semiconductor material, in which one or more shock waves generated using a transducer are transmitted through a liquid medium to semiconductor material in rod form. The transducer is at a distance of from 1 cm to 100 cm from the semiconductor material, and the shock waves have a pulse energy of from 1 to 20 kJ and a pulse rise time to the energy maximum of from 1 to 5 &mgr;s.
Abstract: A process for preparing polyvinyl-alcohol-stabilized polymers based on vinyl ester, ethylene, and optionally other comonomers, in the form of aqueous polymer dispersions or water-redispersible polymer powders, by means of free radical initiated continuous emulsion polymerization and optionally drying the resultant polymer dispersion, comprising carrying out the emulsion polymerization in minimally two pressurized reactors arranged in series at a temperature of from 40° C. to 100° C. and at a pressure of from 5 to 100 bar, to a residual monomer content less than 3% by weight, and continuing the polymerization in minimally one unpressurized reactor at a temperature of from 20° C. to 60° C. and at a pressure of less than 1.0 bar, wherein the polymerization is initiated using a redox system made from an oxidizing component and a reducing component, at least a portion of the reducing component introduced within the first pressurized reactor.
Abstract: Curable addition crosslinkable organopolysiloxane materials employing a platinum catalyst selected from the group consisting of compounds of the formula
and/or oligomeric or polymeric compounds which are composed of structural units of the general formula
and optionally structural units of the general formula
R9rSiO(4−r)/2
in which
R2, R3, R4, R6, R7, R8, R9, r, s and t have the meanings stated in claim 1, may be prepared as one-component formulations having prolonged shelf life, or as two-component formulations having prolonged pot life, while maintaining desirable chemical and physical properties.
Abstract: The invention relates to particles comprises of organopolysiloxane microgel particles having a diameter of 5 to 200 nm and organo-aluminum compounds immobilized thereon. The particles can be used as cocatalysts together with metal compounds of the 4, 5, 6 and 8-10 sub-groups of the periodic table for oligomerization, cyclization of polymerization of olefins.
Type:
Grant
Filed:
April 19, 2000
Date of Patent:
March 19, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Helmut Alt, Frank Baumann, Johann Weis, Alexander Köppl
Abstract: The invention relates to a process for treating filter dusts which are produced during the melting of inorganic compounds, especially those containing fluorides and/or oxides, in which process the filter dusts are fused. The disposal of the fused filter dusts is simple.
Type:
Grant
Filed:
February 25, 2000
Date of Patent:
March 12, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Wilfried Kalchauer, Karl Hutzler, Hubert Bruckmeier
Abstract: A method of producing a polycrystalline silicon rod is by depositing silicon on a carrier rod and cutting to size a molding produced in the process. In order that the silicon rod is given a rod end which is free of cracks and flaking, the rod is rotated about its longitudinal axis and cut through with a parting tool.
Type:
Grant
Filed:
March 9, 2001
Date of Patent:
February 26, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Heinz Kraus, Matthäus Schantz, Peter Niedermeier
Abstract: The invention relates to mixtures of linear organosiloxanes of the general formula 1
R3SiO—(SiR2O)n—SiR3 (1),
where
R can be identical or different and is a hydrocarbon radical having from 1 to 18 carbon atoms which is optionally substituted by fluorine, chlorine or cyano radicals and is free from ethylenically or acetylenically unsaturated bonds, and
n has values from 0 to 20,
where the mean number of carbon atoms of the radicals R is at most 3 and
where the mixtures have evaporated, measured in accordance with DIN 53249,
to an extent of from 80 to 95% by weight after 30 minutes,
to an extent of from 90 to 99% by weight after 60 minutes and
to an extent of from 95 to 100% by weight after 120 minutes.
The mixtures of linear organosiloxanes are added to cosmetic formulations.
Type:
Grant
Filed:
August 13, 1999
Date of Patent:
February 26, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Thomas Koini, Thomas Köhler, Annemarie Huber, Manfred Meisenberger, Marianne D. Berthiaume
Abstract: A continuous process for the polymer-analogous reaction of polymers bearing functional groups with reactive compounds, wherein in a first step, a mixture is prepared from the polymers bearing functional groups and the reactive compounds, and in a second step, the mixture is conducted continuously through a reaction zone and brought to reaction there.
Type:
Grant
Filed:
April 13, 1999
Date of Patent:
February 26, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Frank Baumann, Otto Rothenaicher, Bernward Deubzer, Monika Heindl
Abstract: The invention relates to crosslinkable materials based on organopolysiloxanes. Said materials are characterized in that in addition to organopolysiloxanes they contain at least one low-molecular organosilicon compound with 2 to 17 silicon atoms comprising units of the formula (I) R1aR2b(OR3)cSiO4−(a+b+c)/2, R1, R2, R3, a, b and c having the meaning given in claim 1 provided that low-molecular organosilicon compounds comprising units of the formula (I) where b is 0 have at least one unit of the formula (I) in which a is 0 or 1, and at least one unit of the formula (I) in which a is 3.
Type:
Grant
Filed:
December 23, 1998
Date of Patent:
February 19, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Herbert Barthel, August Altenbuchner, Johann Schuster, Mario Heinemann, Lutz Eismann, Otto Rothenaicher
Abstract: The invention relates to a method for producing Si—H containing siliconimides by achieving balanced proportions of organosilicon compounds containing Si—H groups, in siliconimides. It also relates to siliconimides containing Si—H groups and their applications as Si—H comb-crosslinking agents, as a constitutional unit for spread coating paper or electrical components, in adhesive material, moulding material, film material, coating material, laminated material, tough elastomers and composite matrix material.
Type:
Grant
Filed:
January 19, 2000
Date of Patent:
February 5, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Frank Achenbach, Armin Fehn, Pius Tosch
Abstract: The invention relates to a process for preparing alkylchlorosilanes from the liquid constituents of the residues from the direct synthesis of alkylchlorosilanes which have a boiling point of above 70° C. at 1013 hPa and comprise disilanes, in which the residues are heated with hydrogen chloride and silicon at temperatures of at least 300° C., with at least 10% by weight of trichlorosilane and/or tetrachlorosilane, based on the weight of the alkylchlorosilanes formed, being formed at the same time.
Type:
Grant
Filed:
July 25, 2001
Date of Patent:
February 5, 2002
Assignee:
Wacker-Chemie GmbH
Inventors:
Konrad Mautner, Bernd Köhler, Gudrun Tamme
Abstract: A charging material made from semiconductor material, is used for charging or recharging a melting crucible during the Czochralski crucible-pulling process. This charging material has a polycrystalline semiconductor rod, which at one end has a groove, and a monocrystalline semiconductor rod, which at one end has a tongue, which rods are coupled by means of a tongue-and-groove connection. There is also a holding system for holding a polycrystalline silicon rod during the Czochralski crucible-pulling process or the float zone process, which has a tongue-and-groove connection between the polycrystalline semiconductor rod, which at one end has a groove, and a monocrystalline semiconductor rod, which at one end has a tongue.
Type:
Application
Filed:
May 8, 2001
Publication date:
December 6, 2001
Applicant:
WACKER-CHEMIE GmbH
Inventors:
Axel Frauenknecht, Matthaus Schantz, Viktor Beer
Abstract: Textiles treated with a textile treating composition containing a silane or organosiloxane containing both an Si—C bonded aminoalkyl group containing a primary, secondary, or tertiary amine group, and at least one Si—O—C bonded (iso) oxyalkyl radical exhibit excellent soft hand while maintaining superior water-wettability.
Type:
Grant
Filed:
March 6, 2000
Date of Patent:
December 4, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Hans-Jurgen Lautenschlager, Anton Heller
Abstract: The invention relates to a process for preparing rubber compositions which include gas-containing solid material, in which the solid material is compacted by degassing immediately prior to mixing with rubber base polymer.
Type:
Application
Filed:
May 22, 2001
Publication date:
November 29, 2001
Applicant:
Wacker-Chemie GmbH
Inventors:
Manfred Heisler, Helmut Huber, Alois Schlierf, Christoph Schoffel, Johann Schuster
Abstract: In a continuous process for producing filler-containing silicone compositions (P), a silicone composition (E) comprising filler (F1) is mixed with filler (F2).
Type:
Grant
Filed:
February 25, 2000
Date of Patent:
November 27, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Frank Achenbach, Manfred Heisler, Armin Fehn, Christof Wörner
Abstract: The invention relates to a process for preparing highly disperse silicon dioxide by combustion of organochlorosilicon compounds, which comprises transporting a liquid which contains at least one hydrocarbon compound and at least one organochlorosilicon compound into a burner and burning the liquid there in the presence of an oxygen-containing gas and without supply of water.
Type:
Grant
Filed:
September 8, 1998
Date of Patent:
November 27, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Ernst Mühlhofer, Carl-Heinz Ehrke, Gerhard Kalchgruber, Botho Druse
Abstract: A process for the direct synthesis of organochlorosilanes using CuCl prepared from the copper-containing residues from the direct synthesis of organochlorosilanes, where, in the preparation of the CuCl, in a first step, copper from an aqueous suspension of the copper-containing residues is oxidized to CuCl2 using mineral acid and oxidant, where mineral acid or oxidant or mineral acid and oxidant contain chlorine, giving an aqueous CuCl2 solution, and in a second step, the aqueous CuCl2 solution is reduced to CuCl using elemental iron.
Type:
Grant
Filed:
March 21, 2001
Date of Patent:
November 27, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Wilfried Kalchauer, Herbert Straussberger, Willibald Streckel, Ulrich Goetze