Abstract: 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.
Type:
Grant
Filed:
October 9, 1998
Date of Patent:
February 6, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Willibald Burger, Hans Mayer, Robert Schröck, Holger Wöltje, Bernward Deubzer, Hans Lautenschlager
Abstract: A heat insulating molded body made of inorganic material and inorganic reinforcement fibers is disclosed, as well as a process for producing the same and its use. The molded body is characterized by the following composition: (a) 30-70 wt. % blown vermiculite; (b) 15-40 wt. % inorganic binder; (c) 0-20 wt. % infrared opacifier; (d) 15-50 wt. % microporous material; (e) 0.5-8 wt. % reinforcement fibers which contain maximum 2 wt. % B2O3 and at most 2% alkalimetal oxide, based on the weight of the reinforcing fibers.
Type:
Grant
Filed:
April 20, 1999
Date of Patent:
January 30, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Thomas Eyhorn, Gunter Kratel, Johann Klaus, Robert Kicherer, Bernhard Mikschl, Eugen Wilde
Abstract: Novel organopolysiloxane compositions comprising
(A) organopolysiloxanes which contain at least one SiC-bonded organic radical containing basic nitrogen, where the basic nitrogen is optionally present in part as a salt of a water-soluble organic acid, water-soluble inorganic acid, or water-insoluble organic acid,
(B) anionic, cationic, nonionic or amphoteric surfactants, which are in soluble or soluble in (A)
(C) substituted or unsubstituted diacrylates and/or oligoacrylates, and optionally,
(C′) substituted or unsubstituted acrylates, and
(D) water are described.
Type:
Grant
Filed:
January 25, 1999
Date of Patent:
January 23, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Jochen Dauth, Bernward Deubzer, Robert Schröck, Petra Gratzl
Abstract: A textile binder in the form an aqueous copolymer dispersion or of a copolymer powder obtainable by means of free-radical emulsion polymerization of
a) one or more monomers from the group consisting of vinyl esters, esters of acrylic acid and methacrylic acid, vinylaromatics, vinyl halides and alpha-olefins and
b) from 0.01 to 10% by weight, based on the overall weight of the copolymer, of one or more monomers b1) from the group consisting of the N-(alkoxymethyl)acrylamides and N-(alkoxymethyl)-methacrylamides or one or more monomers b2) from the group consisting of N-methylolacrylamide and N-methylolmethacrylamide, or mixtures b1) and b2), where as emulsifier(s)
from 0.01 to 10% by weight, based on the overall weight of the copolymer, of one or more emulsifiers from the group of the monoesters or diesters of sulfosuccinic acid with linear, unbranched or branched, or cycloaliphatic alcohols, are employed or are added to the aqueous copolymer dispersion after the end of the emulsion polymerization.
Type:
Grant
Filed:
February 5, 1999
Date of Patent:
January 16, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Klaus Kohlhammer, Gerhard Koegler, Andreas Lumpp, Monika Rockinger
Abstract: In a process for the direct synthesis of methylchlorosilanes, chloromethane is reacted with a catalyst composition comprising silicon, copper catalyst, zinc promoter and pyrogenic silicic acid.
Type:
Grant
Filed:
March 13, 2000
Date of Patent:
January 16, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Wilfried Kalchauer, Herbert Straussberger, Willibald Streckel, Ulrich Goetze
Abstract: Condensation-crosslinking, room-temperature vulcanizing silicone rubber compositions A which contain additives B selected from the group consisting of sterically hindered phenols, sterically hindered bisphenols, sterically hindered thiobisphenols, zinc dialkyl dithiophosphates, zinc diaryl dithiophosphates, aromatic amines, sterically hindered amines or preparations containing the abovementioned substances, these additives optionally being present in the compositions A either individually or in any mixtures and mixing ratios with respect to one another.
Type:
Grant
Filed:
January 28, 1997
Date of Patent:
January 9, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Georg Kollmann, Hans-Rudolf Pfeffer, Eva-Maria Puppe
Abstract: A method and apparatus for drying semiconductor fragment material, has at least one vacuum-tight chamber with at least one receiving means for semiconductor fragment material, and there is a means for maintaining a vacuum in the apparatus.
Type:
Grant
Filed:
December 8, 1998
Date of Patent:
January 9, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Wilhelm Schmidbauer, Hanns Wochner, Werner Ott
Abstract: A process for the preparation of di- and trialkylsilanes of the general formula (I)
RaR1bSiXc (I),
in which
mono- or dialkylsilanes of the general formula (II)
R1bSiHaXc (II)
are reacted with alkenes A which have at least 3 carbon atoms and are optionally substituted by fluorine, chlorine or bromine atoms or cyano groups, in the presence of a transition metal catalyst and a trihalogenosilane of the general formula (III)
R2SiY3 (III)
as an activator,
wherein, in the above general formulae (I) to (III),
R is a branched or cyclic hydrocarbon radical having at least 3 carbon atoms, optionally substituted by fluorine, chlorine, or bromine, or cyano groups,
R1 is an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups,
R2 is a hydrogen atom, or an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups,
X is fluorine, chlorine, or bromine, or an alkoxy radical having 1 to 18 carbon atoms optionally substi
Type:
Grant
Filed:
January 28, 2000
Date of Patent:
January 2, 2001
Assignee:
Wacker-Chemie GmbH
Inventors:
Gilbert Geisberger, Tassilo Lindner, Rudolf Reitmeier
Abstract: The invention relates to a process for cleavage of chlorohydrocarbons which are present as an impurity in organochlorosilanes, in which the chlorohydrocarbons are brought into contact with steel surfaces which comprise nickel as an alloying constituent, and are cleaved into olefins and hydrogen chloride.
Abstract: Flexible building compositions are provided which are based on mineral binders and vinylester-ethylene mixed polymers which are stabilized by protective colloids and prepared by radical aqueous emulsion polymerization.
Abstract: The invention relates to a process for drying out rock containing immobile formation water in the intake radius of natural gas wells and gas storage wells which deliver less than 50 l of water per 1000 m.sup.3 (S.T.P.) of natural gas produced, in which a dispersion comprising the componentsA) a water-repellent active compound,B) hydrophilic water-miscible dispersion medium, with or withoutC) a dispersant renders the water-containing rock hydrophobic.
Type:
Grant
Filed:
June 10, 1999
Date of Patent:
December 26, 2000
Assignee:
Wacker-Chemie GmbH
Inventors:
Wendelin Dewenter, Kai-Udo Sewe, Willibald Burger, Michael Geck, Ludwig Esterbauer
Abstract: Organosilicon compounds containing (meth)acrylate groups and oxyalkylene groups and comprising units of the formulaA.sub.a A'.sub.u R.sub.b SiX.sub.c O.sub.(4-a-b-c-u)/2, (I)where R is as defined in claim 1,X are identical or different and are each a radical of the formula --OR.sup.1 where R.sup.1 is a hydrogen atom or an alkyl radical having from 1 to 8 carbon atoms in which ether oxygen atoms may be present, or a radical of the formula--R.sup.2 {[CH(CH.sub.3)CH.sub.2 O].sub.e [CH.sub.2 CH.sub.2 O].sub.f [(CH.sub.2).sub.4 O].sub.g R.sup.3 }.sub.y-1, (II)where R.sup.2, R.sup.3, e, f, g and y are as defined in claim 1, A is a radical of the formula ##STR1## where R.sup.4, R.sup.5 and x are as defined in claim 1, A' is a radical of the formula ##STR2## where R.sup.3, R.sup.5, R.sup.9, R.sup.10, e, f and g are as defined in claim 1,a is 0, 1 or 2, u is 0, 1 or 2, b is 0, 1, 2 or 3 and c is 0, 1, 2 or 3,with the proviso that the sum a+b+c+u.ltoreq.
Abstract: The invention describes novel organosilicon compounds having fluorescent groups, containing units of the formula ##EQU1## where R is an identical or different, a monovalent, optionally substituted hydrocarbon radical having from 1 to 18 carbon atom(s) per radical, which may be interrupted by one or more oxygen atom(s),X is identical or different, and is a chlorine atom or a radical of the formula OR.sup.1,whereR.sup.1 is a hydrogen atom, or an alkyl radical having from 1 to 8 carbon atom(s) per radical which may be substituted by an ether oxygen atom,E is an organic radical having one or more (meth)acrylate groups,A is a radical of the formula--R.sup.2 [--NR.sup.3 --L].sub.x or --R.sup.2 [--S--L].sub.x(II),whereR.sup.2 is a divalent or trivalent, optionally substituted hydrocarbon radical having from 2 to 50 carbon atoms per radical, which is substituted by one or more groups of the formulae ##STR1## x is 1 or 2, R.sup.3 is as defined for R.sup.1 or is a radical of the formula --C(.dbd.O)--R.sup.
Type:
Grant
Filed:
September 10, 1998
Date of Patent:
December 12, 2000
Assignee:
Wacker-Chemie GmbH
Inventors:
Jochen Dauth, Bernward Deubzer, Josef Wolferseder
Abstract: The invention relates to a process for the preparation of silanes of the general formula 1R.sub.m R.sup.1.sub.n SiX.sub.4-m-n (1)by reaction of Grignard reagents of the general formula 2R.sup.1 MgX.sup.1 (2)with silanes of the general formula 3R.sub.m SiX.sub.4-m (3)whereinR denotes C.sub.1 - to C.sub.10 -hydrocarbon radicals optionally substituted by fluorine, chlorine or cyano radicals,R.sup.1, in the .alpha.-position relative to the silicon atom, denotes tertiary C.sub.4 - to C.sub.30 -hydrocarbon radicals optionally substituted by fluorine, chlorine or cyano radicals,X and X.sup.1 each denote chlorine, bromine or iodine,m denotes the values 2 or 3 andn denotes the values 1 or 2,in the presence of a transition metal catalyst and an inert, aprotic, and chelating compound.
Abstract: Previously cross-linked silicone elastomer particles with an organic-polymer shell are used as constituents for formulating aqueous coating compositions based on water-soluble or water-dilutable binders. The silicone elastomer particles contain: (a) 5 to 95% by weight, with respect to the total weight of the copolymer, of a nuclear polymer of general formula (R.sub.2 SiO.sub.2/2).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.z, in which x=5 to 99.5% by mole, y=0.5 to 95% by mole, z=0 to 30% by mole, and (b) 5 to 95% by weight, with respect to the total weight of the copolymer of a shell made of an organopolymer from mono- or poly-ethylenically unsaturated monomers; and R stands for the same or different monovalent alkyl or alkenyl radicals with 1 to 6 carbon atoms, aryl radicals or substituted hydrocarbon radicals.
Type:
Grant
Filed:
September 28, 1998
Date of Patent:
November 14, 2000
Assignee:
Wacker-Chemie GmbH
Inventors:
Michael Geck, Walter Goeblmeier, Bernward Deubzer, Ekkehard Patrick, Helmut Oswaldbauer
Abstract: A process for preparing methylhydrogenpolysiloxanes having trimethylsilyl end groups wherein, in a first step, methyldichlorosilane and trimethylchlorosilane are reacted with at most 0.5 mol of water per mole of hydrolyzable chlorine to give a partial hydrolysate and gaseous hydrogen chloride and, in a second step, the partial hydrolysate, to remove the SiCl groups still present, is treated with water, forming hydrochloric acid.
Abstract: Redispersible tackifier powder compositions which are redispersible in water are provided and which are comprised of one or more tackifying substances and from 2 to 50% by weight of one or more water-soluble low molecular weight homo or copolymers of olefinically unsaturated mono or dicarboxylic acids or their anhydrides. The copolymers also contain other free-radically polymerizable monomers. Antiblocking agents can also be present. Adhesives containing the compositions are also provided.
Abstract: The invention relates to dispersion-powder compositions redispersible in water and containing (a) a vinyl ester ethylene copolymer with 50 to 90% by weight of vinyl esters of C.sub.2 to C.sub.12 carboxylic acid, 1 to 30% by weight of ethylene, 0-20% by weight of vinyl esters of .alpha.-branched monocarboxylic acids with 5 to 10 C-atoms, each in relation to the total weight of the vinyl ester ethylene copolymer, and (b) a water soluble copolymer with 20 to 80% by weight of hydrophobic, substantially water insoluble monomers, 20 to 80% by weight of water-soluble, salt-forming monomers from the group of ethylenically unsaturated sulfonic acids, and 0 to 50% by weight of ethylenically unsaturated monocarboxylic or dicarboxylic acids or the anhydrides thereof, each in relation to the total weight of the water soluble copolymer.
Type:
Grant
Filed:
June 15, 1998
Date of Patent:
October 3, 2000
Assignee:
Wacker-Chemie GmbH
Inventors:
Hans-Peter Weitzel, Peter Ball, Reiner Figge
Abstract: The invention relates to a process for the continuous preparation of HTV silicone compositions, which comprises mixing and homogenizing 100 parts by weight of diorgano(poly)siloxane which has a viscosity of 50 to 100,000 Pas at 25.degree. C. with at least 20 parts by weight of finely divided silicon dioxide which has a tamped density of more than 0.01 kg/l in an oscillating single-shaft pilgrim-step kneader.
Type:
Grant
Filed:
June 10, 1993
Date of Patent:
September 26, 2000
Assignee:
Wacker-Chemie GmbH
Inventors:
Manfred Heisler, Fridolin Stary, Rudolf Ratka, Alois Schlierf
Abstract: The invention concerns water-soluble cross-linkable copolymers having a molecular weight of .ltoreq.500000 and comprising a) between 20 and 95 wt. % sulphonic-acid- or sulphonate-group-containing monomer units; b) between 4 and 80 wt. % N-methylol- or N-alkoxymethyl-group containing monomer units; and c) between 0.1 and 20 wt. % hydrophobic monomer units selected from the group comprising water-insoluble ethylenically unsaturated compounds and hydrophobic end groups of initiator radicals or regulator molecules, the portions in wt. % being relative to the total weight of the copolymer. The portion of sulphonic-acid- or sulphonate-group-containing monomer units can optionally be substituted by up to 50 wt. %, relative to the portion by weight of monomer units a), by carboxyl-group-containing monomer units d) or amide-group-containing monomer units e).
Type:
Grant
Filed:
September 4, 1998
Date of Patent:
September 12, 2000
Assignee:
Wacker-Chemie GmbH
Inventors:
Klaus Kohlhammer, Gerhard Koegler, Peter Ball, Monika Rockinger, Walter Dobler