Patents Assigned to BASF
  • Patent number: 5426163
    Abstract: A process for preparing a free-flowing redispersible powder composed of a vinyl-pyrrolidone/vinyl acetate copolymer containing 15-40% by weight of vinylpyrrolidone units wherein the mixture of the monomers is copolymerized in organic solution, the resulting solution is, after addition of a surfactant, subjected to replacement of the solvent by water, and the resulting dispersion is spray- or freeze-dried, and the use of the redispersible powder for producing paints and coating compositions, glues and adhesives and, in particular, the matrix and/or coating of solid slow-release pharma-ceutical forms and of hair-spray formulations are described.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: June 20, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Volker Buehler, Sven Grabowski, Axel Sanner
  • Patent number: 5426235
    Abstract: Cyclic ketones of the general formula I ##STR1## where n is an integer from 4 to 6, are prepared by reacting aliphatic dicarbonitriles of the general formula IINC--(CH.sub.2).sub.n --CN (II),where n has the abovementioned meaning, in the gas phase in the presence of water at from 250.degree. to 500.degree. C. on solid oxide catalysts.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: June 20, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Juergen Schroeder, Klaus Ebel, Charles Schommer
  • Patent number: 5425784
    Abstract: Water-soluble graft polymers of monosaccharides, oligosaccharides, polysaccharides and derivatives thereof, obtainable by free radical polymerization ofA) a monomer selected from, or a monomer mixture of,(a) from 20 to 100% by weight of acrylic acid or methacrylic acid or of a mixture thereof or of the alkali metal, alkaline earth metal or ammonium salts thereof,(b) from 0 to 80% by weight of other monoethylenically unsaturated monomers which are copolymerizable with the monomers (a) and(c) from 0 to 5% by weight of monomers having at least 2 ethylenically unsaturated, nonconjugated double bonds in the molecule,in the presence ofB) monosaccharides, oligosaccharides, polysaccharides, oxidatively, hydrolyrically or enzymatically degraded polysaccharides, oxidized hydrolyrically degraded or oxidized enzymatically degraded polysaccharides, chemically modified mono-, oligo- or polysaccharides or a mixture of the stated compounds in a weight ratio A:B of from 95:5 to 20:80, are used as a tanning agent for the self-
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: June 20, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Denzinger, Heinrich Hartmann, Brigitte Wegner
  • Patent number: 5425894
    Abstract: Polyhydroxypolyethers as low foam surfactants comprising a compound of the general formula ##STR1## wherein R.sup.1 is a linear or branched C.sub.2 - to C.sub.18 -alkylene radical;R.sup.2 is H, ##STR2## R.sup.3, R.sup.4 are linear or branched C.sub.2 to C.sub.18 alkyl radicals;Z is a number of from 1 to 3;with the proviso that at least one R.sup.2 is ##STR3## n is a number of from 2 to 8; m is a number of from 15 to 34; andl is a number of from 0 to 3.These compounds are useful in cleaning compositions and rinse aids which are low foaming and biodegradable.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: June 20, 1995
    Assignee: BASF Corporation
    Inventors: Michael C. Welch, Jay G. Otten, Glenis R. Schenk
  • Patent number: 5426221
    Abstract: A process for the separation of acrylic acid from the reaction gases from the catalytic oxidation of propylene and/or acrolein by countercurrent absorption using a mixture of from 70 to 75 wt % of diphenyl ether and from 25 to 30 wt % of diphenyl plus from 0.1 to 25 wt % of o-dimethyl phthalate, based on said mixture.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: June 20, 1995
    Assignee: BASF Aktiengesellschaft
    Inventor: Carl-Heinz Willersinn
  • Patent number: 5426146
    Abstract: An aqueous polymer dispersion having a solids volume concentration of 50% by volume or more is obtainable by polymerizing radical polymerizable monomers other than vinyl or vinylidene halides by the method of free radical aqueous emulsion polymerization with the addition of an aqueous starting polymer dispersion having a certain diameter distribution of the starting polymer particles present therein by the stream addition process.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: June 20, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
  • Patent number: 5424132
    Abstract: Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon is based on a magnetic material dispersed in at least one polyureaurethane and a polyurethaneurea (meth)acrylate, the polyurethaneurea (meth)acrylate being obtained by reacting a polyacrylate with a mixture of di- and polyisocyanates and converting the remaining NCO groups into substituted urea groups with aminoalkyltrialkoxysilanes.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: June 13, 1995
    Assignee: BASF Magnetics GmbH
    Inventors: Michael Bobrich, Gregor Brodt, Ria Kress, Milena Melzer, Norbert Schneider
  • Patent number: 5424312
    Abstract: Aminoalkyl-substituted 2-amino-1,3,4-thiadiazoles of the formula ##STR1## where n and A have the meanings stated in the description, and the preparation thereof are described. The compounds are suitable for controlling diseases.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Beatrice Rendenbach-Mueller, Liliane Unger, Hans-Juergen Teschendorf
  • Patent number: 5424403
    Abstract: Aminoazo dyes are prepared from the corresponding N-sulfomethylated aminoazo dyes by aqueous acid hydrolysis in the presence of amidosulfuric acid, urea or mixtures thereof.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Bermes, Heinz Keilhauer
  • Patent number: 5424453
    Abstract: This invention relates to a process for the purification of indigo, wherein the indigo is heated in an inert organic solvent at from 150.degree. to 250.degree. C. and preferably from 180.degree. to 220.degree. C.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Reinhold Kohlhaupt, Udo Bergmann
  • Patent number: 5424330
    Abstract: Benzofurancarboxamides having basic substituents, of the formula I ##STR1## in which R.sup.1 and X have the meanings stated in the description, a process for the preparation thereof, and therapeutic agents containing them.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Rainer Schlecker, Hans-Juergen Teschendorf, Liliane Unger
  • Patent number: 5424404
    Abstract: Biscationic azo dyes useful for dyeing or printing polymeric material have the formula ##STR1## where R.sup.1 is hydrogen or unsubstituted or phenyl-substituted C.sub.1 -C.sub.5 -alkyl,R.sup.2 is hydrogen or C.sub.1 -C.sub.5 -alkyl,R.sup.3 and R.sup.4 are independently of each other hydrogen or methyl,D is the radical of a diazo component, unsubstituted or substituted phenylene or a radical of the formula ##STR2## where Z is a bridge member, Y is hydrogen, C.sub.1 -C.sub.18 -alkyl, C.sub.2 -C.sub.6 -alkylene, xylidene or phenylene,An.sup..crclbar.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Manfred Ruske, Udo Mayer
  • Patent number: 5424445
    Abstract: Alkoxylation products which are suitable as dispersants and are of the general formula I ##STR1## where A is oxygen or --CO--O-- when x and y are each 1 or is nitrogen when x+y=3,B is ethylidene or 1,2-propylidene,Z is one of the groups ##STR2## D.sup..crclbar. is formate, acetate, propionate or hydroxide, E.sup..crclbar. is carboxylate or sulfonate,M is a bridge group for completion of a pyrrolidone, succinimide or maleimide ring to give a group ##STR3## n is from 1 to 50, q is from 1 to 4,x and y are each 1 or 2, with the proviso that x+y.ltoreq.3,R.sup.1 is C.sub.8 -C.sub.30 -alkyl or, when A is oxygen, is C.sub.4 -C.sub.12 -alkyl-substituted phenyl,R.sup.2, R.sup.3 and R.sup.4 are each hydrogen, methyl or ethyl andR.sup.5 is hydrogen or methyl,a process for their preparation, their use for dispersing finely divided solids in flowable media, and formulations containing the alkoxylation products.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Johan H. Hendrick ter Maat, Marion Meyer, Knut Oppenlaender, Michael Zirnstein, Walter Denzinger, Lothar Franz
  • Patent number: 5424461
    Abstract: A process for preparing 1-amino-4-hydroxyanthraquinone by treating 1,4-dihydroxyanthraquinone with ammonia in an aqueous medium comprises treating with ammonia in the presence of a base and of a catalytic amount of a reducing agent at from 60.degree. to 150.degree. C. and at from 1 to 30 bar.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Erwin Hahn, Manfred Patsch, Heike Kilburg
  • Patent number: 5424338
    Abstract: The invention relates to rigid, open-celled hydrophilic polyurethane foams obtained by reacting in the presence of water as a blowing agent and a polyisocyanate with a polyhydric polyamine initiated polyether polyol. The polyether polyol is initiated with a polyhydric polyamine having three (3) to five (5) active amine hydrogens and has internal blocks of polyoxyethylene groups. The foam retains from 15 to 35 times its weight in water.
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: June 13, 1995
    Assignee: BASF Corporation
    Inventor: David C. Krueger
  • Patent number: 5424465
    Abstract: 13-(Z)-Retinoic acid is prepared bya) reacting 5-hydroxy-4-methyl-2(5H)-furanone with a [3-methyl-5-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4-pentadienyl]triarylpho sphonium salt andb) subsequently partially isomerizing the resulting mixture of 13-(Z)- and 11,13-di-(Z)-retinoic acid,where the reaction in step a) is carried out in the presence of lithium hydroxide as alkali metal hydroxide and in dimethylformamide as solvent at from +10.degree. to -9.degree. C. and/or the isomerization in step b) is carried out by irradiating the mixture of isomers obtained in a) in an organic solvent in the presence of a photosensitizer with light in the wavelength range from 200 to 600 nm.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael John, Joachim Paust
  • Patent number: 5424481
    Abstract: A process for preparing methylsulfonylbenzoic acids comprises oxidizing the corresponding methylsulfonyltoluenes with nitric acid and air in sulfuric acid in the presence of vanadium or cobalt compounds.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: June 13, 1995
    Assignee: BASF Aktiengesellschaft
    Inventor: Helmut Hagen
  • Patent number: 5422256
    Abstract: A strain of Bacillus subtilis which is a tryptophan auxotroph, resistant to sulfaguanidine and flourotryptophan and produces anthranilic acid in a nutrient solution containing L-tryptophan, and process for the preparation of anthranilic acid by fermentation.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: June 6, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Bryan Cooper, Joachim Meyer, Klaus Euler
  • Patent number: 5421990
    Abstract: The production of shining shaped articles coated with zinc or a zinc alloy by electrodeposition of zinc or a zinc alloy from acidic aqueous electrolytic baths which contain as essential components one or more zinc salts and, where appropriate, salts of the other alloy metals, one or more conducting salts, one or more surfactants and one or more brighteners, entails employing as brighteners compounds of the formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.8 -alkoxy, phenoxy, benzyloxy, amino, C.sub.1 -C.sub.6 -alkylamino or di(C.sub.1 -C.sub.6)alkylamino,R.sup.2 is C.sub.1 -C.sub.4 -alkyl, phenyl, benzyl or the meanings of R.sup.1, andAr is phenyl or naphthyl which can additionally be substituted by one to three C.sub.1 -C.sub.4 -alkyl groups or C.sub.1 -C.sub.4 -alkoxy groups.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: June 6, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Erwin Hahn, Bernhard Dung, Bernd Burkhart, Chung-Ji Tschang
  • Patent number: 5422137
    Abstract: A wet-on-wet application process by means of an extrusion coater having at least two slot dies is described, the upper lip of the common outlet orifice of the slot dies being recessed relative to the lower lip and a right parallelepiped magnet whose upper edge is opposite the extruder orifice at a distance of, preferably, from 1 to 1.5 mm away being arranged on the other side of the nonmagnetic substrate and parallel to the latter, in which the uppermost layer contains magnetic pigments and has a layer thickness of more than 2.0 .mu.m while the lower layer is nonmagnetic, may contain a conductivity-increasing additive or nonmagnetic fillers and has a thickness of less than 0.5 .mu.m when dry. The magnetic recording medium has very good mechanical and electroacoustic properties, improved conductivity, very good adhesion, improved surface quality and a smaller number of dropouts.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: June 6, 1995
    Assignee: BASF Magnetics GmbH
    Inventors: Gerhard Huebler, Wolf-Dieter Schroeer, Reinhard Kraetschmer, Josef Schelble