Patents Assigned to Cassella Aktiengesellschaft
  • Patent number: 4463165
    Abstract: Hydrophobic textile materials exhibit reduced tendency to static charge buildup, significantly improved absorbency and reduced soiling tendency when treated with a water-dispersible polyester having structural units of the formula ##STR1## wherein A is, on statistical average, 80 to 100 mol percent of p-phenylene and 0 to 20 mol percent of divalent moieties of the formula ##STR2## and wherein G is, on statistical average, 30 to 90 mol percent of linear or branched divalent alkane moieties having 3 to 6 carbon atoms which may be interrupted by 1 or 2 oxygen atoms, 10 to 30 mol percent of divalent polyether moieties having an average molecular weight of 1,000 to 3,000, and up to 50 mol percent of ethylene moieties, and R is a straight-chain or branched alkyl or alkenyl having 6 to 8 carbon atoms.
    Type: Grant
    Filed: November 8, 1983
    Date of Patent: July 31, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Friedrich Engelhardt, Karl Hintermeier, Otto Smerz, Hans Wagener
  • Patent number: 4461622
    Abstract: New phthalocyanine dyestuffs of the formula ##STR1## wherein Phth is a copper phthalocyanine or cobalt phthalocyanine moiety; x is a number from 0 to 3; y is a number from 1 to 4 and the sum of x and y is 4 or less; the thiocyanate group is in the meta or para-position to the amino; and addition products thereof formed with water in the presence of acids; are prepared by converting a phthalocyaninecarboxylic acid into the corresponding acid halide and condensing the acid halide with m- or p-thiocyanoaniline in an inert organic diluent; and the new dyestuffs are for dyeing and printing a material of natural or regenerated cellulose.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: July 24, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Konrad Mix, Erich Feess
  • Patent number: 4452797
    Abstract: Physiologically-acceptable 3-aminosydnonimines of the formula ##STR1## and their pharmacologically-acceptable acid-addition salts, when formulated into medicament dosage forms, are useful for reducing systemic blood pressure, pulmonary artery pressure and left ventricular end diastolic pressure when orally administered to patients in need of such pressure reduction. These compounds are prepared by cyclizing a compound which, in its free-base state, is of the formula ##STR2## to a corresponding product which, in its free-base state, is of the formula ##STR3## and, when R.sup.2 is other than -H, acylating that product.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: June 5, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Karl Schonafinger, Rudi Beyerle, Rolf-Eberhard Nitz, Piero A. Martorana, Volker Fiedler
  • Patent number: 4451631
    Abstract: Sand or rock masses containing mineral oil are deoiled with a deoiling agent containing an aqueous solution of a water-soluble copolymer which is a random distribution of 5 to 60% of weight of units of the formula ##STR1## 2 to 40% by weight of units of the formula ##STR2## and 38 to 93% by weight of units of the formula ##STR3## and partial hydrolysates thereof, wherein when R.sup.1 is hydrogen, R.sup.2 is hydrogen, methyl or ethyl, Y is --CO--NH--C(CH.sub.3).sub.2 --CH.sub.2 -- or a direct bond, and X.sup..sym. is a cation; when R.sup.1 and R.sup.2 are identical or different, each is hydrogen, methyl, ethyl or, together are trimethylene, Y is --CO--NH--C(CH.sub.3).sub.2 --CH.sub.2 -- and X.sup..sym. is cation.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: May 29, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Friedrich Engelhardt, Hermann Schmitz, Walter Gulden, Jorg Hax
  • Patent number: 4451620
    Abstract: Diethanolammonium sulphamate is a curing agent for modified aminoplast resins.
    Type: Grant
    Filed: May 5, 1983
    Date of Patent: May 29, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Steffen Piesch, Peter Dorries
  • Patent number: 4447623
    Abstract: An improved process for preparation of 4,5-dichloro-1,2-dithia-cyclopenten-3-one of the formula ##STR1## by reacting hexachloroprene with sulphur at elevated temperatures, wherein the improvement comprises hydrolyzing by-product sulphur chlorides by conducting the reaction in the presence of water.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: May 8, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Rolf Muller, Herbert Wille
  • Patent number: 4440681
    Abstract: Water-insoluble azo dyestuffs, their manufacture and use, which have the formula ##STR1## wherein D is a substituted phenyl or heterocyclic moiety which are free from ionic substituents and R.sup.1 is methyl or ethyl.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: April 3, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Horst Tappe, Rudolf Lowenfeld, Uwe Kosubek, Maria Kallay
  • Patent number: 4436743
    Abstract: Pharmacologically-active 3-aminosydnonimines (which are optionally substituted in the N.sup.6 -position) and their physiologically-acceptable acid-addition salts are compounded into standard dosage-form medicament compositions and are useful for prophylaxis for and treatment of cardiovascular-system disorders, such as high blood pressure and angina pectoris. The 3-aminosydnonimines are 3-[4-(lower alkoxy)carbonylpiperazin-1-yl]sydnonimines and 3-[N-(lower alkyl)-N-(tetrahydro-3-thienyl S,S-dioxide)]-sydnonimines.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: March 13, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Karl Schonafinger, Rudi Beyerle, Helmut Bohn, Melitta Just, Piero A. Martorana, Rolf-Eberhard Nitz
  • Patent number: 4431830
    Abstract: In a process for preparing isosorbide-5-nitrate, isosorbide is reacted with an aliphatic carboxylic acid, with the formation of an acylation mixture. The acylation mixture is then nitrated, and the resulting nitration mixture is hydrolyzed and/or transesterified in order to split off acyl groups. The product is used in treatment of angina pectoris.
    Type: Grant
    Filed: April 23, 1982
    Date of Patent: February 14, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventor: Karl Schonafinger
  • Patent number: 4431585
    Abstract: Water-insoluble azo dyestuffs suitable for dyeing and printing synthetic hydrophobic fiber materials are produced by azo coupling and have the formula ##STR1## wherein D is free from ionic moieties and is an unsubstituted or substituted phenyl, thiazole, isothiazole, benzthiazole, thiadiazole, benzisothiazole or thiophene moiety;A is alkylene having 2 to 6 carbon atoms which is unsubstituted or substituted by --OH;B is hydrogen, alkyl having 1 to 4 carbon atoms, hydroxyalkyl having 2 to 4 carbon atoms, alkoxyalkyl having 1 to 4 carbon atoms in the alkoxy moiety and a total of 3 to 8 carbon atoms, alkanoyloxyalkyl having 2 to 6 carbon atoms in the alkanoyl moiety and a total of 3 to 8 carbon atoms, hydroxypolyoxyalkylene having 4 to 12 carbon atoms, alkoxypolyoxyalkylene having 1 to 4 carbon atoms in the alkoxy moiety and a total of 5 to 16 carbon atoms, alkanoyloxypolyoxyalkylene having 2 to 5 carbon atoms in the alkanoyl moiety and a total of 5 to 16 carbon atoms, alkanoyl having 2 to 6 carbon atoms or benzo
    Type: Grant
    Filed: February 24, 1981
    Date of Patent: February 14, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Horst Tappe, Ulrich Buhler, Kurt Roth, Hans-J. Weyer, Uwe Kosubek
  • Patent number: 4430090
    Abstract: Dyestuffs of the formula ##STR1## are used for coloring organic solvents, mineral oil products, waxes, plastics and surface coatings, wherein R is alkyl having 1 to 7 carbon atoms, R.sup.1 is alkyl having 1 to 8 carbon atoms or alkenyl having 3 or 4 carbon atoms, and R.sup.2 is hydrogen, alkyl having 1 to 8 carbon atoms or alkenyl having 3 or 4 carbon atoms.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: February 7, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Ulrich Buhler, Reinhard Hahnle, Joachim Ribka, Helmut Richter
  • Patent number: 4430494
    Abstract: Modified melamine-formaldehyde resins having a melamine:formaldehyde molar ratio of 1:(1.27 to 0.7) are prepared by heating melamine in an aqueous solution or suspension with formaldehyde in a melamine:formaldehyde molar ratio of 1:(1.27 to 0.7) at a pH value of 8 to 11 and at temperatures of 105.degree. to 160.degree. C. until the finished resin has reached a dilutability with water of 1:(0.1 to 4) at 20.degree. C., and, before, during or after the condensation reaction, adding less than 25% by weight of a glycol ether of the formulaR(OCH.sub.2 CH.sub.2).sub.n OHin which R denotes alkyl having 1 to 4 C atoms and n denotes an integer from 1 to 5, and/or of p-toluenesulfonamide. The resins are used in particular for the production of molding compositions.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: February 7, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Hans Honel, Walter Michel, Steffen Piesch, Karin Schluter, Alfons Wolf
  • Patent number: 4430380
    Abstract: A bonded structure of textile materials bonded by a melamine-formaldehyde precondensate is produced by applying to a textile material a melamine-formaldehyde precondensate with a molar ratio of melamine to formaldehyde of 1:(0.8 to 1.26) to form a composite and then compressing the composite with an overpressure of 1 to 200 bars at temperature of from 130.degree. to 220.degree. C.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: February 7, 1984
    Assignee: Cassella Aktiengesellschaft
    Inventors: Hans Honel, Walter Michel, Steffen Piesch, Karin Schluter, Manfred Seidel, Wolfgang Spieler
  • Patent number: 4421516
    Abstract: An improved process for preparing discharge prints on textile materials containing hydrophobic fibers wherein at least one disperse dyestuff dischargeable to white is applied to the textile material in the form of a dyeing liquor of print paste and also contacted by a pattern-applied discharge resist print paste, and then the material is heat treated at 100.degree. to 230.degree. C., wherein the improvement comprises said discharge resist print paste having, under the heat treatment conditions, a pH value of zero to 3.
    Type: Grant
    Filed: March 10, 1983
    Date of Patent: December 20, 1983
    Assignee: Cassella Aktiengesellschaft
    Inventors: Theo Stahl, Ulrich Buhler
  • Patent number: 4420308
    Abstract: In a process known per se for the preparation of white patterns or patterns of various colors on a colored substrate on textile materials comprising hydrophobic synthetic fibres or on textile materials based on mixed fibres composed of polyester and cellulose comprising discharge printing wherein a discharge reserving agent based on an alkali or on sulphites, the improvement which comprises employing as the dischargeable disperse dyestuffs having the formula I ##STR1## in which R and K have the meanings given in claim 1.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: December 13, 1983
    Assignee: Cassella Aktiengesellschaft
    Inventors: Ulrich Buhler, Horst Kindler, Klaus Kuhlein, Maria Kallay, Uwe Kosubek, Rudolf Lowenfeld, Kurt Roth
  • Patent number: 4417897
    Abstract: An improved process for preparing white or colored burn-out effects on textile materials containing hydrophobic fibers and cellulose fibers which process comprises applying to the material a dyeing liquor or printing paste containing at least one disperse dyestuff for dyeing the hydrophobic fibers alone or mixed with dyestuff for dyeing the cellulose fibers, applying a burn-out agent to the textile material in the form of a pattern, and then heat-treating the textile material at about 100.degree. to 240.degree. C. whereby the dyestuff is fixed and the burnout effect is produced, wherein the improvement comprises said dyeing liquor or print paste contains at least one disperse dyestuff which is discharged by the burn-out agent.
    Type: Grant
    Filed: March 10, 1983
    Date of Patent: November 29, 1983
    Assignee: Cassella Aktiengesellschaft
    Inventors: Theo Stahl, Ulrich Buhler
  • Patent number: 4418014
    Abstract: The process for recovering recyclable sulphur from a strongly colored solution obtained from the production of sulphur dyestuffs containing alkali metal sulfides, alkali metal polysulfides, sulphur dyestuffs or mixtures thereof comprising(a) mixing said solution at an alkaline pH with a decolorizing amount of an iron or zinc compound which is a hydroxide or the salt of an inorganic acid whereby a precipitate is formed,(b) separating the precipitate to isolate a decolorized solution, and either(c) precipitating elemental sulphur from the decolorized solution by adding sulphur dioxide or alkali metal thiosulfate under acidic conditions, and(d) separating the precipitated elemental sulphur, or(e) recycling the decolorized solution for use in the manufacture of sulphur dyestuffs.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: November 29, 1983
    Assignee: Cassella Aktiengesellschaft
    Inventor: Georg Daniek
  • Patent number: 4416665
    Abstract: Water-insoluble azo dyestuff of the formula ##STR1## its manufacture and its use as the dyestuff in the dyeing and printing of hydrophobic fiber materials.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: November 22, 1983
    Assignee: Cassella Aktiengesellschaft
    Inventors: Horst Tappe, Kurt Roth
  • Patent number: 4416893
    Abstract: Pharmaceutical compositions comprising as pharmacologically active component a 1,2,5-oxadiazole-2-oxide of the general formula I ##STR1## wherein R.sup.1 and R.sup.2 have the following meaning:______________________________________ R.sup.1 R.sup.2 ______________________________________ 1. CO--NH.sub.2 CH.sub.3 2. COOC.sub.2 H.sub.5 CH.sub.3 3. CO--NHNH.sub.2 CH.sub.3 4. COOH CH.sub.3 5. --NH--COOC.sub.2 H.sub.5 CH.sub.3 6. --NH--COOC.sub.3 H.sub.7 (n) CH.sub.3 7. --NH--COOC.sub.3 H.sub.7 (i) CH.sub.3 8. --NH--COOC.sub.4 H.sub.9 (n) CH.sub.3 9. --NH--COOCH.sub.2 --phenyl CH.sub.3 10. CO--NH.sub.2 CO--NH.sub.2 11. CN CN 12. COOH COOCH.sub.3 13. COOCH.sub.3 COOCH.sub.3 14. COOC.sub.2 H.sub.5 COOC.sub.2 H.sub.5 15. CH.sub.3 CO--NH.sub.2 16. CH.sub.3 COOC.sub.2 H.sub.5 17. CH.sub.3 CO--NHNH.sub.2 18. CH.sub.3 COOH 19. CN CO--NH.sub.2 20. CO--NH--phenyl CO--NH--phenyl 21. CH.sub.3 NH--COOC.sub.2 H.sub.5 22. CH.sub.3 NH--COOC.sub.3 H.sub.7 (n) 23. CH.sub.3 NH--COOC.sub.3 H.sub.7 (i) 24. CH.sub.3 NH--COOC.sub.4 H.
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: November 22, 1983
    Assignee: Cassella Aktiengesellschaft
    Inventors: Karl Schonafinger, Rudi Beyerle, Anton Mogilev, Helmut Bohn, Piero Martorana, Rolf-Eberhard Nitz
  • Patent number: 4415494
    Abstract: Monoazodyestuffs free from water solubilizing moieties and which are useful in dyeing and printing polyester materials, mixtures of polyesters with natural materials or cellulose triacetate materials have the formula ##STR1## wherein X.sup.1 is nitro, cyano or methylsulphonyl and R.sup.1 is of the formula ##STR2## wherein Y.sup.1 is hydrogen, methyl or ethyl; Y.sup.
    Type: Grant
    Filed: March 19, 1981
    Date of Patent: November 15, 1983
    Assignee: Cassella Aktiengesellschaft
    Inventors: Ulrich Buhler, Rudolf Lowenfeld, Uwe Kosubek, Maria Kallay