Patents Assigned to Rutgerswerke AG
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Patent number: 5525698Abstract: A polymerizable mixture comprising 100 parts by weight of at least one epoxy compound and 0.01 to 50 parts by weight of a metal complex compound of the formulaML.sub.x B.sub.y or M[SR].sub.x B.sub.z,wherein M is a metal ion of a metal of main groups II and III and sub-groups thereof of the Periodic Table, L is a chelate forming ligand selected from the group consisting of dioximes, .alpha.- and .beta.-hydroxycarbonyl compounds or enolizable 1,3-diketones, SR is an acid ion of an inorganic acid, B is a Lewis base, x is an integer from 1 to 8, y is an integer from 1 to 5 and z is an integer from 7 or 8 with the proviso that B is not a polyvalent phenolic compound and a process for the polymerization thereof.Type: GrantFiled: September 27, 1994Date of Patent: June 11, 1996Assignee: Rutgerswerke AGInventors: Axel Bottcher, Egon Uhlig, Manfred Fedtke, Manfred Doring, Klaus Dathe, Bernd Nestler
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Patent number: 5456935Abstract: A food product containing an effective amount of a water-soluble alkali metal or ammonium huminate with a molecular weight of up to 50,000 D produced synthetically by oxidation of multi-valent phenolic compounds sufficient to protect the gastric and intestinal regions of a warm-blooded animal.Type: GrantFiled: November 16, 1994Date of Patent: October 10, 1995Assignee: Rutgerswerke AGInventors: Manfred Kuhnert, Anton F. Haase, Hans W. Kleffner
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Patent number: 5434225Abstract: An epoxy resin adhesive, sealing or coating composition containing as a curing agent an addition product of A) at least one member of the group consisting of primary amines and secondary amines and B) at least one ester having a formula selected from the group consisting of ##STR1## wherein m is 0 or 1, n is an integer from 3 to 25, 0 is an integer from 1 to 20, p is an integer from 1 to 10, R.sub.1 is selected from the group consisting of furyl, phenyl and hydrogen, R.sub.2 is hydrogen or methyl R.sub.3 is ##STR2## R.sub.5 is methylene or --CH.sub.2 --CH--CH.sub.2 --R.sub.6 --CH.sub.2 --. R.sub.6 is selected from the group consisting of ##STR3## R.sub.7 is selected from the group consisting of methylene, ##STR4## and R.sub.8 and R.sub.9 are individually ethylene or propylene.Type: GrantFiled: December 6, 1994Date of Patent: July 18, 1995Assignee: Rutgerswerke AGInventors: Alfred Mathes, Ulrich Grundke, Bert Meier, Jurgen Zehrfeld
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Patent number: 5395913Abstract: A polymerizable mixture comprising 100 parts by weight of at least one epoxy compound and 0.01 to 50 parts by weight of a metal complex compound of the formulaML.sub.x B.sub.y or M[SR].sub.x B.sub.z,wherein M is a metal ion of a metal of main groups II and III and sub-groups thereof of the Periodic Table, L is a chelate forming ligand selected from the group consisting of dioximes, .alpha.- and .beta.-hydroxycarbonyl compounds or enolizable 1,3-diketones, SR is an acid ion of an inorganic acid, B is a Lewis base, x is an integer from 1 to 8, y is an integer from 1 to 5 and z is an integer from 7 or 8 with the proviso that B is not a polyvalent phenolic compound and a process for the polymerization thereof.Type: GrantFiled: March 2, 1994Date of Patent: March 7, 1995Assignee: Rutgerswerke AGInventors: Axel Bottcher, Egon Uhlig, Manfred Fedtke, Manfred Doring, Klaus Dathe, Bernd Nestler
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Patent number: 5304225Abstract: Mixtures consisting of a phenolic resin, a hardener, and residues from bisphenol-A production in the ratio of 1:9 to 9:1 are used for the production of binder mixtures for thermostable molding materials. Usable for said purpose are binders with a minimum content of phenolic resin of 10%.Type: GrantFiled: October 25, 1991Date of Patent: April 19, 1994Assignee: Rutgerswerke AGInventors: Arno Gardziella, Karl-Heinz Schwieger, Peter Adolphs, Josef Suren, Bertold E. Meier
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Patent number: 5283045Abstract: A carbon powder is disclosed with 40 to 75% by weight QI or more than 90% by weight TI, an optical anisotropy of less than 50% by volume, a start of softening between 200.degree. and 300.degree. C., and an oxygen content of more than 2% by weight, and which can be used for without binding agent the production of shaped carbon bodies. The carbon powder is produced by means of distillation from bituminous product at a maximum of 5 mbars and a final temperature of at least 400.degree. C., grinding of the distillation residue to a particle size of less than 30 .mu.m, and oxidation of the powder into the particle core.Type: GrantFiled: January 14, 1993Date of Patent: February 1, 1994Assignee: Rutgerswerke AGInventors: Winfried Boenigk, Hans-Dieter Behrens, Andreas Niehoff, Hans Spengler
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Patent number: 5271772Abstract: A process for the decontamination of surfaces and solid objects contaminated with hazardous chemical substances comprising treating the surfaces and solid objects with a solution of alkali metal huminates of low molecular weight and compositions used therein.Type: GrantFiled: February 3, 1992Date of Patent: December 21, 1993Assignee: Rutgerswerke AGInventors: Urs Riede, Hans W. Kleffner, Bernhard Seubert
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Patent number: 5262043Abstract: An isotropic coal tar pitch having a low content of carcinogenic compounds is prepared by distilling a coal tar pitch in an evaporator having a specific evaporator surface of from 330 to 10,000 m.sup.2 /m.sup.3, at a temperature in the range of from 300.degree. to 380.degree. C., under a pressure not exceeding 1 mbar, whereby the average stay period is from 2 to 10 minutes. The isotropic pitch thus obtained contains less that 50 ppm of benzo[a]pyrene and is suitable, optionally after adding an oil, resin or other modifying agents having a low benzo[a]pyrene content, for use as binding and impregnating agent and also as protecting agent in construction materials or as varnish (painting agent).Type: GrantFiled: April 17, 1992Date of Patent: November 16, 1993Assignee: Rutgerswerke AGInventors: Winfried Boenigk, Hans-Dieter Behrens, Hans Spengler
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Patent number: 5153333Abstract: A process for the preparation of 2-oxo-1, 3-dioxolanes comprises reacting an epoxy compound having at least one functional epoxy group in the optional presence of an inert solvent with carbon dioxide at 60.degree. C. to 200.degree. C. at normal pressure in the presence of a quaternary phosphonium compound as catalyst and novel quaternary phosphonium compounds useful as catalysts in the said process.Type: GrantFiled: September 17, 1991Date of Patent: October 6, 1992Assignee: Rutgerswerke AGInventors: Frank Schubert, Rolf Herzog, Bert Meier, Jurgen Zehrfeld
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Patent number: 5149886Abstract: In a process for the preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene by condensing fluorenone and phenol in a molar ratio of 1:4 to 1:8 at 30.degree. to 90.degree. C. in the presence of gaseous hydrogen chloride and .beta.-mercapto-propionic acid catalyst, the improvement comprising distilling water of reaction and dissolved hydrochloric acid from the completed reaction mixture, dissolving the distillation residue in a nitrile, separating the crystallized adduct of nitrile and 9,9-bis-(4-hydroxphenyl)- fluorene from the nitrile and optionally dissociating the adduct to recover high purity 9,9-bis-(4-hydroxphenyl)- fluorene.Type: GrantFiled: February 11, 1992Date of Patent: September 22, 1992Assignee: Rutgerswerke AGInventors: Winfried Orth, Emmerich Pastorek, Wolfgang Weiss, Hans W. Kleffner
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Patent number: 5102702Abstract: Binder mixtures crosslinkable by radiation comprising as component A a product obtained by reaction of an epoxy compound with more than one epoxide group per molecule with at least one carboxylic acid in a molar ratio of epoxide groups to carboxyl groups of 1:0.5-0.9 and subsequent reaction of the reaction product with at least one unsaturated isocyanatocarbamate esters and as component B a product obtained by reaction of an epoxy compound with more than one epoxide group per molecule with at least one olefinic unsaturated carboxylic acid in a molar ratio of epoxide groups to carboxyl groups of 1:>>1 and subsequent reaction of the reaction product with at least one polybasic carboxylic acid or anhydride(s) thereof, components A and B being present in a weight ratio of 3:1 to 1:3 useful for the product of superior photo-resists and protective lacquers.Type: GrantFiled: July 22, 1991Date of Patent: April 7, 1992Assignee: Rutgerswerke AGInventors: Ulrich Grundke, Klaus-Peter Liebetanz, Achim Hansen, Jurgen Zehrfeld
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Patent number: 5082944Abstract: A method for the production of heavy metal-free pyridine -3-sulfonic acid by oxidation of 3-chloro-pyridine to 3-chloro-pyridine-N-oxide, substitution of the chlorine through a sulfonic acid group, and subsequent reduction to pyridine-3-sulfonic acid. The method can be carried out using raw 3-chloropyridine-N-oxide and direct further reaction of the pyridine-3-sulfonic acid-N-oxide in the presence of Raney nickel in an alkaline solution.Type: GrantFiled: October 31, 1990Date of Patent: January 21, 1992Assignee: Rutgerswerke AGInventors: Rolf Losch, Winfried Orth, Wolfgang Weiss, Hans W. Kleffner
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Patent number: 5075155Abstract: A prepreg comprising a porous support material impregnated with a binder consisting essentially of an epoxy resin, a bisphenol novolac hardener and 0.4 to 2.0% by weight based on the total binder of an imidazole and a method of preparing laminates of composite materials therefrom.Type: GrantFiled: May 16, 1990Date of Patent: December 24, 1991Assignee: Rutgerswerke AGInventors: Karl Jellinek, Berthold Meier, Horst Duda, Winfried Reisel
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Patent number: 5075416Abstract: A process for the preparation of an aromatic hydrocarbon resin modified with aromatic carboxylic acids comprising suspending methane sulfonic acid and at least one aromatic carboxylic acid in an aliphatic solvent and slowly proportioning at least one unsaturated aromatic hydrocarbon into the suspension under polymerization conditions and their salts.Type: GrantFiled: January 29, 1991Date of Patent: December 24, 1991Assignee: Rutgerswerke AGInventors: Peter Staglich, Bodo Friedrich, Hans Spengler, Robert Zellerhoff
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Patent number: 5071951Abstract: A hardening agent for epoxy compounds prepared by reacting A) at least one member of the group consisting of polyalkyleneetherdiols and polyalkyleneetherpolyols with B) at least one polyisocyanate with a molar ratio of hydroxy groups to isocyanate group of 1:1.8 to 3, reacting the resulting product with C) an amine having at least one free primary or secondary amino group and at least one protected primary amino group with a molar ratio of isocyanate to amino groups of 1:1 to 2 and subjecting the latter product to hydrolysis useful for preparation of flexible hardened products with excellent mechanical properties.Type: GrantFiled: June 11, 1990Date of Patent: December 10, 1991Assignee: Rutgerswerke AGInventors: Grundke Ulrich, Alfred Mathes, Achim Hansen, Rolf Herzog
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Patent number: 5066806Abstract: A process for the recovery of isomeric pure 7-chloro-quinaldine from isomeric mixtures of chloro-quinaldines comprising dissolving the isomeric mixture of chloro-quinaldines in an organic solvent, adding an aqueous tartaric acid solution to the organic solution to form the tartrate of 7-chloro-quinaldine in crystalline form, recovering the crystals and treating the same with a base to obtain 7-chloro-quinaldine.Type: GrantFiled: August 13, 1990Date of Patent: November 19, 1991Assignee: Rutgerswerke AGInventors: Emmerich Pastorek, Winfried Orth, Wolfgang Weiss, Hans W. Kleffner
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Patent number: 5049191Abstract: An asbestos-free friction material for brake linings and clutches comprising at least one binder and a reinforcing material, at least a portion of the reinforcing material being sepiolite in the form of short fibers.Type: GrantFiled: March 15, 1990Date of Patent: September 17, 1991Assignee: Rutgerswerke AGInventors: Detlef U. Pflug, Wilfried Koch, Armin Eckert
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Patent number: 5043365Abstract: A granular molding material with a binder comprising a phenol novolac and a polyisocyanate which hardens upon addition of amine catalysts wherein the molar ratio of phenol to formaldehyde in the novolac is 1:0.25 to 1:0.5 and has the formula ##STR1## wherein R, R' and R" are individually selected from the group consisting of hydrogen, alkyl of 1 to 12 carbon atoms, hydroxy, cycloalkyl of 3 to 12 carbon atoms and an anellated ring and X is an integer from 0 to 4 or >4 with the percent molar distribution based on X is as follows:______________________________________ when X = 0: 20-55% X = 1: 15-30% X = 2: 10-30% X = 3: 0-50% X .gtoreq. 4: 0-2.5% ______________________________________for the production of improved foundry cores and molds.Type: GrantFiled: September 14, 1989Date of Patent: August 27, 1991Assignee: Rutgerswerke AGInventors: Arno Gardziella, Alois Kwasniok, Peter Adolphs, Ralf Wetzig
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Patent number: 5034495Abstract: A hardening agent for epoxy prepared by reacting A) a hydroxy containing ketimino compound with B) a diisocyanate compound with one isocyanate group blocked, reacting the resulting adduct with C) a polyether amine and hydrolysis of the reaction product, reactants A), B) and C) being in approximately stoichiometric amounts resulting in flexible hardened products of good resistance to chemicals and aging.Type: GrantFiled: June 7, 1990Date of Patent: July 23, 1991Assignee: Rutgerswerke AGInventors: Achim Hansen, Alfred Mathes, Jurgen Zehrfeld
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Patent number: 5032629Abstract: Novel hardening agents for epoxy compounds which are produced by reaction of polyalkylene, polyether amines having a mean molecular weight of 148 to 5,000 with di and/or polyepoxy compounds to a preliminary product, the ratio of the hydrogen atoms possibly remaining after reaction with monoepoxy compounds and bound to nitrogen and which are capable of reaction with epoxide groups, to epoxide groups of diepoxy compounds or polyepoxy compounds in the range of 1:1.4 to 6, and reaction of this preliminary product with a primary or secondary amine, the employed amine or amine mixture being used in an amount such that the ratio of epoxide groups capable of reaction to hydrogen atoms attached to nitrogen is 1:2 to 10.Type: GrantFiled: February 28, 1990Date of Patent: July 16, 1991Assignee: Rutgerswerke AGInventors: Achim Hansen, Alfred Mathes, Jurgen Zehrfeld