Abstract: Antimicrobial activity is imparted to the surface(s) of an apparatus or article by polymerizing tert-butylaminoethyl methacrylate in the presence of the apparatus or article by which adhesion of the polymer to the surface(s) is achieved. In a preferred embodiment of the invention the antimicrobial monomer is graft polymerized on the surface(s).
Type:
Grant
Filed:
March 17, 2000
Date of Patent:
November 13, 2001
Assignee:
Degussa-Huels Aktiengesellschaft
Inventors:
Peter Ottersbach, Frank Hill, Christine Anders
Abstract: Molecular weight-enlarged, homogeneously soluble ligands are provided that are especially useful for hydrogenation catalysts, wherein the ligands contain homochiral active centers of bis(3,4-diarylphosphinyl)pyrrolidines, and their use in producing cataylsts for enantioselective reactions, as well as the catalysts thus produced.
Type:
Application
Filed:
January 24, 2001
Publication date:
October 25, 2001
Applicant:
Degussa-Huels Aktiengesellschaft
Inventors:
Olaf Burkhardt, Jens Woeltinger, Andreas Bommarius, Juan Jose Almena Perea, Hans Henniges, Karlheinz Drauz, Andreas Karau, Jean-Louis Philippe, Hans-Peter Krimmer, Gunther Oehme
Abstract: A dish rack for a dishwasher, including a frame and a coating covering the frame and configured to distribute water over a surface of the coating in a thin film.
Abstract: A solid, oxazoline-terminated, urethane-functional polyaddition compound having a melting point ranging from 40-130° C. and a free NCO content of less than 3% by weight, consisting essentially of a reaction product of a) at least one at least difunctional polyisocyanate and b) at least one hydroxy- or amino-functional oxazoline derivative, the ratio of NCO to OH equivalents ranging from 0.8:1.2 to 1.2:0.8.
Abstract: A process for the isolation of high-boiling monomers from distillation residue formed in the cyclodimerization and/or cyclotrimerization of 1,3-butadiene after target products of cyclooctadiene, vinylcyclohexene and/or cyclododecatriene have been separated off, comprising extracting the distillation residue with a nonpolar or slightly polar solvent, separating off insoluble oligomers and polymers that have at least partly crystallized by mechanical separation, removing the extractant, and isolating the high-boiling monomers.
Type:
Application
Filed:
January 31, 2001
Publication date:
October 11, 2001
Applicant:
DEGUSSA-HUELS AKTIENGESELLSCHAFT
Inventors:
Thomas Schiffer, Matthias May, Norbert WILCZOK, Georg Oenbrink
Abstract: A crosslinkable hot-melt adhesive composition, comprising a reactive powder mixed with a crosslinking component of a crosslinking agent bound in a polyolefin matrix, wherewith the components of the composition do not react by crosslinking until the mixture is melted, said composition being useful for the coating and/or lamination of sheet-like structures.
Abstract: Particulate magnesium ethoxide having a high coarse particle content can be obtained in a simple and economical manner by the present invention, which provides a process for preparing particulate magnesium ethoxide having a coarse grain content, and includes reacting metallic, optionally activated, magnesium with liquid ethanol under pressure at a temperature above 78° C. The present invention also relates to particulate magnesium ethoxide having a coarse grain content, which contains:
<40% by weight of a screening fraction ≦500 &mgr;m and
≧60% by weight of a screening fraction >500 &mgr;m.
Type:
Grant
Filed:
October 27, 1999
Date of Patent:
October 2, 2001
Assignee:
Degussa-Huels Aktiengesellschaft
Inventors:
Reinhold Schork, Burkhard Standke, Hartwig Rauleder, Albert-Johannes Frings, Michael Horn, Peter Jenkner, Jaroslaw Monkiewicz
Abstract: A process for electrolytically producing an amalgam from metal salt, using an anion exchanger membrane. The chlorine-free process provides amalgam produced from metal salt and having a high degree of purity, and ensures advantageous parameters, such as a low cell voltage and high current efficiencies.
Type:
Grant
Filed:
March 19, 1999
Date of Patent:
September 25, 2001
Assignee:
Degussa-Huels Aktiengesellschaft
Inventors:
Carl Heinz Hamann, Peter Schmittinger, Joerg Helling
Abstract: Cyanoacetamide is prepared without additional catalyst by esterification of crude cyanoacetic acid with a monohydric alcohol which forms an azeotrope with water and has 4 to 10 carbon atoms, reacting the resulting ester with ammonia in the presence of a basic catalyst to give cyanoacetamide, and work-up by a mechanical separating operation and a thermal treatment.
Type:
Application
Filed:
February 27, 2001
Publication date:
September 13, 2001
Applicant:
DEGUSSA-HUELS AKTIENGESELLSCHAFT
Inventors:
Manuela Imig, Manfred Kaufhold, Thomas Kalz
Abstract: An aqueous organopolysiloxane-containing composition comprising organopolysiloxanes of formula I:
HO [Si(A)(CH3)z(OH)1−zO]a[Si(B)(R2)y(OH)1−yO]b[Si(C)(CH3)O]c[Si(D)(OH)O]dH.
Type:
Grant
Filed:
January 12, 1999
Date of Patent:
September 11, 2001
Assignee:
Degussa-Huels Aktiengesellschaft
Inventors:
Burkhard Standke, Roland Edelmann, Albert-Johannes Frings, Michael Horn, Peter Jenkner, Ralf Laven, Helmut Mack, Jaroslaw Monkiewicz
Abstract: Cyanoacetamide is prepared without additional catalyst by esterification of crude cyanoacetic acid with a monohydric alcohol which forms an azeotrope with water and has 4 to 10 carbon atoms, reacting the resulting ester with ammonia in the presence of a basic catalyst to give cyanoacetamide, and work-up by a mechanical separating operation and a thermal treatment.
Type:
Grant
Filed:
February 27, 2001
Date of Patent:
September 11, 2001
Assignee:
Degussa-Huels Aktiengesellschaft
Inventors:
Manuela Imig, Manfred Kaufhold, Thomas Kalz
Abstract: The present invention relates to a process for the production of salts of cyclic amidines of the general formula (I)
The processes described hitherto as prior art enable salts of the compound (I) to be produced only at low yields. As a result of protecting &ohgr;-amino-&agr;-amino acids selectively at the &ohgr;-amino function, oxidative decarboxylation of the latter protected compounds by means of halogen derivatives, and subsequent cyclisation of the oxidatively decarboxylated substances with the addition of acid, according to the invention salts of the compound (I) are achieved in better yields.
Abstract: Bases and organic acids are simultaneously separated from aqueous solutions comprising bases and organic acids by electrochemically treating aqueous solutions containing these components, particularly the aqueous waste solution obtained from an aldolization reaction.
Abstract: A shaped, activated, fixed-bed Raney metal catalyst prepared by a method comprising preparing a mixture of powders comprising at least one catalyst alloy of (1) at least one catalytically active Raney process metal, a leachable alloy component and optionally a promoter, (2) at least one binder containing at least one pure Raney metal and (3) a moistening agent. Shaping, calcining and activating said catalyst and doping said catalyst with rhenium.
Type:
Grant
Filed:
August 5, 1999
Date of Patent:
September 4, 2001
Assignee:
Degussa-Huels Aktiengesellschaft
Inventors:
Daniel Ostgard, Konrad Moebus, Monika Berweiler, Barbara Bender, Gernot Stein
Abstract: A multilayer plastic pipe having strong bonding between the layers has at least one layer I of a polyolefin molding composition comprising a polyolefin, at least one layer II of a polyester molding composition, and at least one layer III of an adhesion promoter containing reactive groups and located between layers I and II. The polyester molding composition of layer II comprises a polyester and one or more compounds selected from a compound having two or more carbodiimide groups, carboxylic anhydride groups, maleimide groups or oxazine groups.
Type:
Application
Filed:
January 4, 2001
Publication date:
August 30, 2001
Applicant:
DEGUSSA-HUELS AKTIENGESELLSCHAFT
Inventors:
Guido Schmitz, Georg Oenbrink, Walter Hellermann, Thomas Grosse-Puppendahl, Harald Haeger
Abstract: Transition metals may be recovered from a salt-containing mixture containing at least one transition metal compound, salts, and organic compounds by separating from the salt-containing mixture a mixture of the transition metal compound and the salts. This mixture, together with any organic impurities, is introduced into a combustion zone, and the flue gas/salt mixture leaving the combustion zone is quenched with water. The combustion residue, containing the transition metal, is separated from the resulting quench solution, dried, and converted to fresh catalyst.
Type:
Application
Filed:
February 21, 2001
Publication date:
August 30, 2001
Applicant:
DEGUSSA-HUELS AKTIENGESELLSCHAFT
Inventors:
Frank Bauer, Uwe Prange, Christoph Theis
Abstract: A reinforced molding material having high tensile strength comprising:
(a) from 0 to 98 parts by weight of one or more thermoplastics,
(b) from 2 to 100 parts by weight of a substantially amorphous polyolefin which has been subjected to free radical grafting with a silane which has at least one olefinic double bond and one to three alkoxy groups bonded directly to the silicon, this grafted polyolefin having a melt viscosity at 190° C. In the range from 100 to 50,000 maps and the parts by weight of (a) and (b) sunning to 100, and
(c) from 0.5 to 400 parts by weight of a reinforcing material. The molding material can be used, inter alia, for shaped articles, as hotmelt adhesives or for heavy-duty carpet backing materials.
Type:
Grant
Filed:
March 3, 1999
Date of Patent:
August 28, 2001
Assignee:
Degussa-Huels Aktiengesellschaft
Inventors:
Peter Bickert, Ralf Laven, Hans Guenther Wey