Patents Assigned to BASF
  • Method of polymerizing styrene
    Patent number: 4281067
    Abstract: By using alpha,alpha'-bis-t-butylperoxydiisopropylbenzene (TDB) as an organic peroxide synergist in making expandable polystyrene having a K value of 55-59 and containing an organic bromide reaction mixture compatible with the polymerization (such as hexabromocyclododecane), excellent results are obtained. Specifically, foams of overall improved properties, namely in flammability, collapse and shrinkage, are obtained.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: July 28, 1981
    Assignee: BASF Wyandotte Corporation
    Inventors: Charles Kienzle, Stanley E. Gebura, John W. Boghosian
  • Complementary pre-emphasis and de-emphasis circuits for a video signal transfer channel
    Patent number: 4281346
    Abstract: Complementary circuits for pre-emphasis and de-emphasis of video luminance signals, the circuits permitting an improved signal-to-noise ratio in a video signal transfer channel. The video signal has separate frequency- and amplitude-sensitive portions as well as a linear gain portion, thereby providing a fixed gain up to a predetermined lower frequency, a fixed response between this frequency and a variable upper frequency breakpoint, and an amplitude-dependent gain above the upper frequency breakpoint. De-emphasis is performed by a circuit also having separate frequency- and amplitude-sensitive portions and a linear gain portion, and which may be readily matched to the pre-emphasis circuit.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: July 28, 1981
    Assignee: BASF Aktiengesellschaft
    Inventor: Caljon H. Strobele
  • Sulfo, chloro phenolazoacetoacetylbenzamide dyes
    Patent number: 4280955
    Abstract: A 1:2 cobalt complex of the formula ##STR1## and its alkali metal salts and ammonium salts and methods of preparing the same are disclosed. On wool and nylons, the compounds give yellow dyeings which exhibit good wetfastness and very good lightfastness.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: July 28, 1981
    Assignee: BASF Aktiengesellschaft
    Inventor: Hans Baumann
  • Benzylpyrimidines, processes for their manufacture, and drugs containing the said compounds
    Patent number: 4279899
    Abstract: 5-Benzyl-2,4-diaminopyrimidines, in which the 2-amino group is substituted, and which may or may not be substituted in the phenyl ring, and their physiologically acceptable addition salts with acids, processes for their manufacture, drugs containing these compounds, and the use of the said compounds in infectious diseases.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: July 21, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Gutsche, Peter Scharwaechter, Wilhelm Kohlmann, Gerd Kroemer
  • Chirally substituted 2-imidazolin-5-ones
    Patent number: 4280008
    Abstract: Chirally substituted 2-imidazolin-5-ones and their use as intermediates for the preparation of optically active aminoacids, especially of optically active .alpha.-substituted aminoacids.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: July 21, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Schoellkopf, Hans-Heinrich Hausberg, Walter Boell, Hans-Joachim May, Horst Koenig
  • Process for separating hydrophobic organic liquids from water
    Patent number: 4279757
    Abstract: A process for separating hydrophobic organic liquids from water comprising passing a mixture of water and hydrophobic organic liquids through a column-like vessel which is filled with a hydrophobic, preferably open-celled, polyurethane foam, said foam having a high absorption capacity, permits high flow-through velocities even as the foam becomes covered and saturated with the hydrophobic organic liquids, is reversibly deformable, and can be reused.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: July 21, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerard DeBeuckelaer, Wolfgang Jarre, Rolf Wurmb, Matthias Marx
  • .gamma.-Azolyl compounds, agents containing them for regulating plant growth, and the manufacture thereof
    Patent number: 4278800
    Abstract: New .gamma.-azolyl compounds, especially ethers, esters and carbamates, processes for their manufacture, agents for influencing plant growth which contain these compounds as active ingredients, and processes for regulating plant growth with these compounds.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Costin Rentzea, Hubert Sauter, Eberhard Ammermann, Gerd Heilen, Johann Jung
  • Manufacture of an ethylene oxide catalyst
    Patent number: 4278562
    Abstract: A catalyst for the manufacture of ethylene oxide, giving improved yield and having a long life, based on an alkali metal-modified silver catalyst on an oxide carrier is obtained by providing the silver-containing catalyst, in the reduced state, with the alkali metal by applying an alcoholic alkali metal salt solution which also contains an organic oxygen compound or nitrogen compound which forms complexes with silver ions.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolf D. Mross, Eckart Titzenthaler, Juergen Koopmann, Matthias Schwarzmann, Volker Vogt
  • Preparation of 1-amino-2-phenoxy-4-hydroxyanthraquinone
    Patent number: 4278606
    Abstract: In a process for the preparation of 1-amino-2-phenoxy-4-hydroxyanthraquinone by reacting 1-amino-2-halogeno-4-hydroxyanthraquinone with a phenol in an alkaline aqueous medium at an elevated temperature, the improvement that 1-amino-2-chloro-4-hydroxyanthraquinone is reacted in aqueous suspension, at a pH of from 9 to 13 and at from 120.degree. to 150.degree. C., with the phenol in the presence of(a) ammonium salts N.sup..sym. (R).sub.4 A.sup..crclbar., wherein one or more R's are linear or branched C.sub.4 -C.sub.20 -alkyl or C.sub.7 -C.sub.10 -phenylalkyl and the remaining R or R's may also be phenyl or N.sup..sym. (R).sub.3 may be pyridinium, and A.sup..crclbar. is one equivalent of an anion, of(b) ethylene oxide/propylene oxide block copolymers or of(c) oxyethylation products of alkylphenols, of alkenylamines, of alkylamines or of alkanols. A very pure product is obtained, in high yield.
    Type: Grant
    Filed: March 7, 1980
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Hiller, Heinz Eilingsfeld, Helmut Reinicke, Fritz Traub
  • Stimulation of oil and gas wells with phosphate ester surfactants
    Patent number: 4278129
    Abstract: Crude oil and gas production wells, which no longer produce oil or gas utilizing conventional primary and secondary means of recovery, can be returned to production by treatment comprising addition of an aqueous solution of certain phosphate ester surfactants followed by successive treatment with a hydrocarbon. Increased production also can be obtained in low-producing oil and gas wells by similar treatment with certain phosphate ester surfactants. Subsequent to treatment of a producer well, the phosphate ester surfactant is forced into the formation utilizing a hydrocarbon and said surfactant and hydrocarbon mixture is allowed to remain in the producing well, for an effective period of time ranging from not less than 24 hours to one month. Thereafter, pumping and/or conventional fluid drive means are then utilized to recover oil or gas from the subterranean oil or gas formation.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: July 14, 1981
    Assignee: BASF Wyandotte Corporation
    Inventor: William B. Walton
  • Resist printing process
    Patent number: 4278433
    Abstract: A process for the production of resist prints under reactive dyes on textile materials which consist of cellulose fibers or a blend of cellulose fibers with other fibers, using reaction products of bisulfite adducts of aldehydes of 2 to 6 carbon atoms, or of ketones, with ammonia, primary amines or secondary amines in the molar ratio of from 3:1 to 1:1 as resists. Preferably, reaction products of a bisulfite adduct of acetaldehyde and ammonia in the molar ratio of from 3:1 to 1:1 are employed as resists. Because of the high stability of the resist print pastes, high color yields of the resist dye and satisfactory, reproducible resist effects of the ground dye are achieved.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Adolf Blum, Siegmar Lukas, Hermann Schwab, Rolf Strobel
  • Process for the preparation of an aryl mono-, di-, and/or polyurethane
    Patent number: 4278805
    Abstract: A process for the preparation of an aryl-mono and/or polyurethane comprising the steps ofA. reacting a primary aromatic mono, di-, and/or polyamine with an O-alkyl carbamate in the presence of alcohol and catalysts, andB. separating the ammonia and other by-products from the aliphatic and/or cycloaliphatic di- and/or polyurethane.The reaction is preferably carried out in the presence of urea. The aryl mono-, di-, and/or polyurethanes produced are valuable end and intermediate products. They can be transferred into the corresponding isocyanates which can then be used for the preparation of polyurethanes.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Friedrich Towae
  • Isolation of a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture
    Patent number: 4278504
    Abstract: A process for isolating a conjugated diolefin from a C.sub.4 - or C.sub.5 -hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises(a) from 1 to 99 percent by weight of an N-alkyl-substituted lower aliphatic acid amide or of an N-alkyl-substituted alicyclic acid amide having 5 ring members and(b) from 1 to 99 percent by weight of an aliphatic or alicyclic ether boiling at from 30.degree. C. to 200.degree. C.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Klaus Brollos, Alfred Lindner, Ulrich Wagner, Hans-Martin Weitz, Klaus-Jurgen Schneider
  • Preparation of 5-hydroxymethylimidazoles
    Patent number: 4278801
    Abstract: A process for the manufacture of 5-hydroxymethylimidazoles by reaction of an imidazole with formaldehyde or an oligomer of formaldehyde in aqueous hydrochloric acid solution containing from 5 to 18% by weight of hydrogen chloride, at from 80.degree. to 160.degree. C., if desired in a closed system under pressure, followed by isolation in the form of its hydrochloride of the 5-hydroxymethylimidazole obtained.
    Type: Grant
    Filed: February 8, 1980
    Date of Patent: July 14, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Uwe Kempe, Toni Dockner, Anton Frank, Helmut Karn
  • Isolation of 1,3-butadiene from a C4-hydrocarbon mixture
    Patent number: 4277314
    Abstract: A process for isolating 1,3-butadiene by means of a selective solvent from a C.sub.4 -hydrocarbon mixture which contains 1,3-butadiene, propyne, hydrocarbons which are more soluble than 1,3-butadiene in the selective solvent and hydrocarbons which are less soluble than 1,3-butadiene in the selective solvent, wherein the C.sub.4 -hydrocarbon mixture is separated, using one or more extractive distillation zones, into a distillate containing the less soluble hydrocarbons, a stream of 1,3-butadiene and a stream containing the more soluble hydrocarbons, and the propyne is separated off either by distillation of the C.sub.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Lindner, Klaus Volkamer, Ulrich Wagner
  • Herbicidal agents based on acetanilides
    Patent number: 4277278
    Abstract: Herbicidal agents containing an N-azolylmethylhaloacetanilide of the formula ##STR1## where R denotes hydrogen or alkyl or alkoxy of a maximum of 5 carbon atoms, R.sup.1 denotes hydrogen, halogen, or alkyl or alkoxy of a maximum of 5 carbon atoms, R.sup.2 denotes hydrogen, halogen, or alkyl or alkoxy of a maximum of 5 carbon atoms, R together with R.sup.2 forms an alkylene chain of a maximum of 6 carbon atoms which is linked in the o-position and is unsubstituted or substituted by linear alkyl of a maximum of 4 carbon atoms, X denotes chlorine or bromine, and A denotes an azole and a haloacetanilide of the formula ##STR2## where R denotes alkyl, alkenyl or alkynyl, each of a maximum of 4 carbon atoms, or --A--R.sup.1, A denoting alkylene of 1 or 2 carbon atoms which may be monosubstituted by ethyl or mono- or disubstituted by methyl, and R.sup.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl Eicken, Bruno Wuerzer
  • Preparation of modified polymers of N-vinylpyrrolid-2-one and their use for the preparation of polymers interrupted by bridge members
    Patent number: 4277576
    Abstract: A process for the preparation of modified poly-N-vinylpyrrolid-2-one containing two identical reactive groups, wherein polyvinylpyrrolidone is treated with complex hydrides, with or without further reaction of the modified polyvinylpyrrolidone with a reactive bifunctional compound, to give a polymer which has a molecular weight at least 2.5 times as great as that of the starting polymer.
    Type: Grant
    Filed: February 26, 1980
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Ferdinand Straub, Herbert Spoor, Claus Cordes
  • Freeze modification agent
    Patent number: 4277520
    Abstract: The strength of ice is reduced by dissolving in water prior to freezing a composition of (A) a water-soluble polyhydroxy compound or monoalkylether thereof and (B) an alkali metal carbonate in an amount to provide an effective amount of (A) plus (B). The method is especially useful for application to particulate solids, such as coal and mineral ores, which are shipped and stored in masses exposed to freezing temperatures. Any ice that is formed is physically weak and will not deter the unloading of the thusly conditioned particulate solids.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: July 7, 1981
    Assignee: BASF Wyandotte Corporation
    Inventors: Clyde G. Inks, John W. Compton, Kathryn M. Ellerman, Lee H. Bergman
  • Method of using 1,2-benzisothiazoles
    Patent number: 4277477
    Abstract: Novel 1,2-benzisothiazoles and a process for the manufacture of 1,2-benzisothiazoles by reacting o-haloaryl ketones with ammonia and elementary sulfur. The compounds are starting materials for the manufacture of dyes, crop protection agents and drugs.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Hagen, Rolf-Dieter Kohler, Juergen Markert
  • Urethane group-containing polyisocyanurate foam based on naphthenic acid-hydroxylamine adduct
    Patent number: 4277571
    Abstract: This invention relates to an urethane group containing polyisocyanurate foam produced from a polyisocyanate and a polyhydroxy compound, wherein the polyhydroxy compound is the reaction mixture of a hydroxyl group containing amine which is at least difunctional and is selected from the group consisting of a secondary amine, a tertiary amine, and a mixture thereof, and a naphthenic acid, or a mixture of said reaction mixture and a conventional polyol, the reaction conditions are a temperature between 0.degree. C. and 150.degree. C. and an amino equivalent to carboxylic equivalent of 0.3:1 to 50:1.
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: July 7, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Georg Falkenstein, Hansjuergen Kessler