Patents by Inventor Rolf Fikentscher

Rolf Fikentscher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4588531
    Abstract: Alkali metal and alkaline earth metal salts of acyloxybenzenesulfonic acids of the formula I ##STR1## where R is a saturated or unsaturated alkyl radical of 1 to 17 carbon atoms or is phenyl which is unsubstituted or monosubstituted or disubstituted by alkyl of 1 to 3 carbon atoms, halogen, methoxy or nitro, are prepared by neutralization, by a method in which a liquid acyloxybenzenesulfonic acid of the formula I and an aqueous solution of an alkali metal or alkaline earth metal hydroxide, carbonate or bicarbonate are combined in water, at from 0.degree. to 60.degree. C. and while mixing throughly, so that the pH is kept at from 2.5 to 7.0, and, if desired, the resulting salt is isolated from the aqueous solution in a conventional manner.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: May 13, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolf-Dieter Balzer, Hans-Heinrich Bechtolsheimer, Karl-Heinz Beyer, Rolf Fikentscher, Johannes Perner, Rudi Widder, Helmut Wolf
  • Patent number: 4537701
    Abstract: Petroleum demulsifiers which contain, as the active ingredients, oxyalkylated isoalkylphenol-formaldehyde resins and oxyalkylated polyalkylenepolyamines.
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: August 27, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Knut Oppenlaender, Rolf Fikentscher, Egon Buettner, Wilhelmus Slotman, Erich Schwartz, Rudolf Mohr
  • Patent number: 4488879
    Abstract: This invention relates to dyeing textile materials of polyacrylonitrile or copolymers containing acrylonitrile in polymerized form with basic dyestuffs in aqueous dyeing liquors using the exhaust method employing retarders. The retarders are obtained by condensing (a) piperazine and piperazine derivatives with (b) ethylene chloride, epihalohydrin, propylene chloride, 1,3-dichloro-2-hydroxypropane, bis-epoxybutane, 1,4-dichlorobutene or their mixtures in mole ratios of 1:0.9 to 1:1.1. The condensation products are then quaternized with benzyl chloride using 0.8 to 1.5 moles of benzyl chloride per mole of component (a) for the quaternization. The aqueous solutions of the retarders either do not foam or show a very low foaming tendency.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: December 18, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fikentscher, Herbert Fleischer, Sigismund Heimann, Heinrich Mertens
  • Patent number: 4444959
    Abstract: Water-soluble benzylated polyamidoamines which contain from 0.1 to 0.9 mole of benzyl groups per equivalent of nitrogen, and onto which from 20 to 400 parts by weight of ethyleneimine or propyleneimine have been grafted per 100 parts by weight of polyamidoamine, processes for the preparation of the materials, and the use of the materials as cationic assistants in processes for coloring paper with acid dyes and/or direct dyes in an aqueous medium. The papers obtained show a high color strength, with substantially no two sidedness of the coloration.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: April 24, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenter Frey, Werner Streit, Rolf Fikentscher, Hans-Juergen Degen, Wolf Guender
  • Patent number: 4425238
    Abstract: A process for removing anionic compounds from water which is recycled in manufacturing processes, and from waste water, by adding (1) water-soluble products obtained by reacting an alkylating agent, having an aromatic substituent, with a cationic polyelectrolyte and (2) mineral adsorbents and/or a magnesium salt, aluminum salt or iron salt, with formation and flocculation of water-insoluble reaction products.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: January 10, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Juergen Degen, Wolf Guender, Friedrich Linhart, Werner Auhorn, Guenter Frey, Werner Streit, Rolf Fikentscher
  • Patent number: 4383834
    Abstract: A process for coloring paper with an acid dye and/or direct dye in an aqueous medium in the presence of a water-soluble reaction product of an alkylating agent, possessing an aromatic substituent, with a cationic polyelectrolyte.The process gives papers with high color strength and substantially avoids cylinder twosidedness of the coloration.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: May 17, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Juergen Degen, Wolf Guender, Guenter Frey, Werner Streit, Rolf Fikentscher, Klaus Wulz
  • Patent number: 4371674
    Abstract: Process for the production of water-soluble auxiliaries for the papermaking industry by reacting(a) 1 part by weight of a polyamidoamine obtained by condensing 1 mole of a dicarboxylic acid having from 4 to 10 carbon atoms with from 0.8 to 1.4 moles of a polyalkylene polyamine having from 3 to 10 alkyleneamine units and containing up to 8 ethyleneimine units per basic nitrogen atom with (b) 0.1 to 4 parts by weight of an .alpha.,.omega.-dichloro polyalkylene oxide obtained by reacting a polyalkylene oxide having from 8 to 100 alkylene oxide units with a compound selected from the group consisting of a thionyl chloride and phosgene and then cleaving the reaction products by heating them to a temperature of from 70.degree. to 150.degree. C. in the presence of a tertiary amine as catalyst,as crosslinking agent, at a temperature above 20.degree. C.
    Type: Grant
    Filed: July 30, 1980
    Date of Patent: February 1, 1983
    Inventors: Otto Hertel, Emil Scharf, Jaroslav Melzer, Rolf Fikentscher
  • Patent number: 4268402
    Abstract: Aqueous textile softeners containing as active ingredient a condensate of 1 mole of a bis- or tris-hydroxyalkylamine of the formula ##STR1## where R.sup.1 is H, alkyl of 1 to 4 carbon atoms, hydroxyethyl or 2-hydroxypropyl and R.sup.2 is H or CH.sub.3, with from 0.8 to 2 moles of a fatty acid of 16 to 18 carbon atoms, the said condensate being in the form of a salt with an inorganic or organic acid or being partially or completely quaternized at the amine nitrogen, cannot readily be formed into liquids containing 10% or more of active ingredient.According to the invention liquids containing from 15 to 40% by weight of such an active ingredient can be formed by adding from 3 to 15% by weight based on the active ingredient of a compound of the formula II ##STR2## where n is an integer from 1 to 4, R.sup.3 and R.sup.4 independently of one another are methyl, ethyl or propyl, R.sup.5 is hydrogen or methyl and R.sup.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: May 19, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Joachim Kurze, Rolf Fikentscher, Georg Krusche
  • Patent number: 4224421
    Abstract: Water-soluble, crosslinked nitrogen-containing condensation products, the viscosity of which, in aqueous solution, increases with increasing temperature, are obtained by reacting a block copolymer of the formula: ##STR1## x is from 50 to 250, y is from 20 to 100, the ratio of x to y is from 6.5:1 to 1:15, with compounds having at least four basic NH groups in a weight ratio of from 0.8:1 to 30:1. The products are added to aqueous systems, e.g. polymer solutions and polymer dispersions, to improve the viscosity characteristics.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: September 23, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Streit, Rolf Fikentscher, Karl Gans, Gerhard Welzel, Klaus Glaser, Emil Schaefer
  • Patent number: 4200733
    Abstract: Iodine-containing block copolymers which contain from 5 to 25% by weight of bonded iodine, and which are based on iodine-free compounds of the formula IR(AB).sub.z Iwhereif z=1, R is hydrogen or a C.sub.1 -C.sub.18 -aliphatic hydrocarbon radical,if z.noteq.1, R is a z-valent aliphatic hydrocarbon radical of 2 to 8 carbon atoms, which may or may not carry up to z ethylene oxide units,z is from 1 to 6,A is a polymer or copolymer block of from 4 to 100 1,4-butylene oxide units and from 0 to 25 ethylene oxide units andB is a polymer or copolymer block of from 0 to 50 1,4-butylene oxide units and from 1 to 100 ethylene oxide units, the proportion of 1,4-butylene oxide being >50 mole % in A and <50 mole % in B.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: April 29, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Johannes Perner, Norbert Greif, Rolf Fikentscher, Paul Diessel
  • Patent number: 4178217
    Abstract: A zinc electroplating bath which contains polyalkylenepolyamines which possess alkyl and sulfoalkyl groups.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: December 11, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Glaser, Werner Streit, Rolf Fikentscher, Guenther Gotsmann
  • Patent number: 4151127
    Abstract: Certain melamine derivatives are added as anti-foam agents to detergents, cleaners and rinses.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: April 24, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Johannes Perner, Guenter Frey, Herbert Helfert, Rolf Fikentscher
  • Patent number: 4144123
    Abstract: Crosslinked water-soluble reaction products for the papermaking industry obtained by reacting(a) 1 part by weight of a polyamidoamine obtained by condensation of 1 mole of a dicarboxylic acid with from 0.8 to 1.4 moles of a polyalkylenepolyamine such as diethylenetriamine, up to 8 ethyleneimine units per basic nitrogen atom being optionally grafted onto the condensation product, with(b) from 0.3 to 2 parts by weight of a reaction product of a polyalkylene oxide having from 8 to 100 alkylene oxide units with epichlorohydrin,In aqueous solution at a temperature of from 20.degree. to 100.degree. C., the solution having a solids content of from 5 to 50% by weight. The viscosity of an aqueous solution containing 20% of the reaction product is from 300 to 2,500 centipoises at 20.degree.C.
    Type: Grant
    Filed: April 25, 1978
    Date of Patent: March 13, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Emil Scharf, Rolf Fikentscher, Werner Auhorn, Werner Streit
  • Patent number: 4135992
    Abstract: An aqueous cyanide-free alkaline zinc bath for electroplating metallic surfaces with mirror-bright zinc coatings, which bath contains zinc ions, alkali metal hydroxides and, as the brightener, a polyalkylenepolyamine which is at least partially alkylated, with alkyl of 1 to 3 carbon atoms, at the basic nitrogens.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: January 23, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fikentscher, Klaus Glaser, Guenther Gotsmann, Werner Streit
  • Patent number: 4128511
    Abstract: Water-soluble, crosslinked nitrogen-containing condensation products, the viscosity of which, in aqueous solution, increases with increasing temperature, are obtained by reacting a chlorohydrin-ether of the formula ##STR1## where x is from 50 to 250, y is from 20 to 100, the ratio x:y is from 6.1:1 to 1:15 and n is from 0.5 to 5, with ethyleneimine in the weight ratio of from 1:10.1 to 1:0.8; the condensation products are added to aqueous systems, e.g. polymer solutions and polymer dispersions, to improve the viscosity characteristics.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: December 5, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Streit, Rolf Fikentscher, Karl Gans, Gerhard Welzel
  • Patent number: 4066494
    Abstract: Production of water-soluble crosslinked auxiliaries for the papermaking industry by reactingA. one equivalent of NH groups of a polyalkylene polyamine having from 15 to 500 alkyleneimine units withB. from 0.001 to 0.08 mole of a reaction product obtained from a polyalkylene oxide having from 8 to 100 alkylene oxide units with epichlorohydrin,In aqueous solution at a temperature of from 20.degree. to 100.degree. C. The viscosity of an aqueous solution containing 20% by weight of the crosslinked auxiliaries is from 300 to 1,500 centipoises (20.degree. C).
    Type: Grant
    Filed: July 10, 1975
    Date of Patent: January 3, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Emil Scharf, Rolf Fikentscher, Werner Auhorn, Werner Streit
  • Patent number: 4052384
    Abstract: Aziridinocarboxylic acid esters of polyols are manufactured by trans-esterification of the corresponding esters of lower alcohols, using magnesium oxide or calcium oxide as the trans-esterification catalyst; this method gives a higher yield and a purer product.
    Type: Grant
    Filed: April 13, 1976
    Date of Patent: October 4, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Toni Dockner, Albrecht Wallis, Rolf Fikentscher, Rainer Thomas, Reinhard Herzog
  • Patent number: 4052159
    Abstract: Special quaternary ammonium salts derived from triaminoalkyl derivatives of hexahydrotriazine for use as retarders in the dyeing of anionic polyacrylonitrile fibers with basic dyes.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: October 4, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Ernst Fuerst, Jozsef Gerendas, Rudolf Rokohl, Rolf Fikentscher, Herbert Helfert
  • Patent number: 4049851
    Abstract: Bonded textile sheet materials having improved water vapor absorbency can be manufactured by bonding the sheets with polymeric binders and additionally impregnating these sheets with glycidyl ethers, chlorohydrin compounds corresponding thereto and/or reaction products of the chlorohydrin compounds with compounds containing NH groups, and drying the impregnated sheets at elevated temperatures and at the same time fixing the impregnants by means of compounds containing NH groups.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Greif, Rolf Fikentscher, Axel Sanner
  • Patent number: 4038296
    Abstract: Alkylene oxide derivatives based on tetrahydrofuran copolymers and having the formula R-X, wherein X consists essentially of a copolymer of tetrahydrofuran and a C.sub.2 to C.sub.3 alkylene oxide, R being the radical of a C.sub.8 to C.sub.22 alcohol or carboxylic acid or their oxyalkylation products with from 1 to 20 moles of said C.sub.2 to C.sub.3 alkylene oxide, the total amount of the alkylene oxide and tetrahydrofuran units in R-X being from 60 to 95% by weight and the molar ratio of the alkylene oxide units to tetrahydrofuran units being from 1:0.5 to 1:3. The new products R-X are useful as surfactants, textile auxiliaries and, in particular, emulsifiers in the one-bath finishing and pigment dyeing of textiles.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: July 26, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Greif, Heinz Bille, Rolf Fikentscher, Toni Simenc