Patents Assigned to Dr. Beck & Co. AG
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Patent number: 6162840Abstract: The invention concerns the use of monomer-free saturated or unsaturated polyester resins or mixtures of saturated and unsaturated polyester resins containing structural units of general formulae (I) and/or (II), in which n=1-10, as impregnation, sealing and coating compounds for electrical engineering and electronic components and for carrier substances for flat insulating materials.Type: GrantFiled: July 6, 1998Date of Patent: December 19, 2000Assignee: Dr. Beck + CO.AGInventors: Rainer Blum, Thomas Loerzer, Gunther Hegemann, Manfred Eichhorst
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Patent number: 4435541Abstract: Thermoplastic molding masses based on the copolymerization of styrene and/or .alpha.-methylstyrene and acrylonitrile, which may be modified to be impact resistant with rubberlike polymers, are made antistatic by adding 0.01 to 1.5 percent by weight of a graft polyol which is a polyhydroxy-polyalkylene polyether modified with styrene-acrylonitrile copolymers.Type: GrantFiled: March 25, 1982Date of Patent: March 6, 1984Assignee: Dr. Beck & Co. AGInventors: Franz Brandstetter, Juergen Hambrecht, Bernhard Scharf, Gerhard Lindenschmidt, Josef Schwaab, Rudolf H. Jung
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Patent number: 4390686Abstract: A method of insulating an electrical conductor by applying thereto a coating of a polyesterimide resin which can be hardened through its free OH groups from a resin melt at above 100.degree. C., wherein the resin used is solvent-free and has been prepared by esterification or ester-exchange of starting materials for the polyesterimide in the presence of an excess of one or more short-chain diols and subsequent removal of the diol or diols in such a way that the condensation is only effected to an extent such that the Durrans softening point of the unhardened resin is not above 150.degree. C. (preferably not above 100.degree. C.) and the viscosity of the molten resin at 180.degree. C. is not above 5000 (preferably not above 1000) mPa s (cP). This process avoids the disadvantages encountered when a solvent is present in the insulating bath.Type: GrantFiled: April 12, 1982Date of Patent: June 28, 1983Assignee: Dr. Beck & Co. AGInventors: Harald Janssen, Ferdinand Hansch
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Patent number: 4360543Abstract: A method of insulating an electrical conductor by applying thereto a coating of a polyesterimide resin which can be hardened through its free OH groups from a resin melt at above 100.degree. C., wherein the resin used is solvent-free and has been prepared by esterification or ester-exchange of starting materials for the polyesterimide in the presence of an excess of one or more short-chain diols and subsequent removal of the diol or diols in such a way that the condensation is only effected to an extent such that the Durrans softening point of the unhardened resin is not above 150.degree. C. (preferably not above 100.degree. C.) and the viscosity of the molten resin at 180.degree. C. is not above 5000 (preferably not above 1000) mPa s (cP). This process avoids the disadvantages encountered when a solvent is present in the insulating bath.Type: GrantFiled: January 7, 1980Date of Patent: November 23, 1982Assignee: Dr. Beck & Co. AGInventors: Harald JanBen, Ferdinand Hansch
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Patent number: 4186241Abstract: A partially crystalline thermoplastic polyamide for use in the preparation of insulated wires through the extrusion of a thermoplastic coating, consisting of terephthalic acid or a functional derivative thereof, hexamethylenediamine and isophoronediamine; also disclosed are a process for the preparation of insulated wires using the above polyamine; and an insulated wire employing such polyamide as the thermoplastic coating.Type: GrantFiled: December 4, 1978Date of Patent: January 29, 1980Assignee: Dr. Beck & Co. AGInventor: Harald Janssen
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Patent number: 4169085Abstract: An aqueous electrically insulating varnish is provided along with a process for producing the varnish; the process comprises the steps of reacting cyclopentane tetracarboxylic acid with dicyclic, diprimary aromatic diamine in the presence of water and neutralizing the condensation product to form a varnish.Type: GrantFiled: January 18, 1978Date of Patent: September 25, 1979Assignee: Dr. Beck & Co. AGInventors: Ferdinand Hansch, Knut VON Loh, Harald Janssen
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Patent number: 4147817Abstract: A process for providing electrical conductors with a heat resistant, insulating coating of resin. The process comprises passing the conductors through a melt of a resin which is polyester curable through free hydroxy groups, having crosslinking equivalent weight of 400-1600, which is produced by condensation at a temperature corresponding at least to the temperature of the melt to an extent such that no substantial further condensation takes place in the melt.Type: GrantFiled: July 6, 1976Date of Patent: April 3, 1979Assignee: Dr. Beck & Co. AG.Inventor: Harald Janssen
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Patent number: 4146703Abstract: Unsaturated homopolymerizable or copolymerizable polyester resins having incorporated therein at least one 5 or 6-membered cyclic imide group, and methods for their preparation are described.Type: GrantFiled: August 22, 1977Date of Patent: March 27, 1979Assignee: Firma Dr. Beck & Co. AGInventors: Karl Schmidt, Hans Dannebaum, deceased, Gerhard Brockmann
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Patent number: 4145351Abstract: Diimidodicarboxylic acids for the preparation of polyester resins which in addition to ester groups, contain imide groups between functional groups of the molecule. The imide groups are in the form of 5-membered imide rings resulting from the condensation of, for example, an aromatic carboxylic acid anhydride and a primary amine. The resins can be used in lacquers for production of insulated electrical conductors, with the resin being the film forming component of the lacquers.Type: GrantFiled: June 11, 1976Date of Patent: March 20, 1979Assignee: Dr. Beck & Co. AGInventors: Karl Schmidt, Ferdinand Hansch, Hans-Malte Rombrecht
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Patent number: 4145474Abstract: A method of extruding a thin sheath of plastic material about electric wire, utilizing a plastic material capable of being shaped by extrusion after having been heated in a screw extruder, this material exhibiting the technical characteristics required for enamel-type insulation after cooling, without necessitating subsequent treatment. An extrusion material containing at least one partially crystalline thermoplastic polycondensate wherein the crystallites have a melting-point above 170.degree. C. answers these requirements.Type: GrantFiled: June 29, 1977Date of Patent: March 20, 1979Assignees: Maillefer S.A., Dr. Beck & Co. AGInventors: Eberhard Kertscher, Harald Janssen
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Patent number: 4131693Abstract: A varnish is provided for coating a wire which is directly tinnable. The varnish comprises hardenable polyester urethane having a urethane equivalent weight of 150-850, the polyester being formed as the product of the reaction of a saturated polyester containing at least two hydroxyl functional groups and an aromatic isocyanate containing at least two functional groups of isocyanate and a phenol-free solvent for the polyester urethane. A process for producing this varnish is also provided.Type: GrantFiled: July 18, 1977Date of Patent: December 26, 1978Assignee: Dr. Beck & Co AGInventors: Hartmut Wendt, Horst Von Gruner, Harald Janssen
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Patent number: 4104221Abstract: Water dilutable electroinsulation enamels are made by reacting a hydroxyl group containing polyesteramide of low acid number with at least one amine in an amount of 5 to 30% by weight relative to the weight of the ester imide whereupon the reaction product is diluted with water until it has the desired viscosity for lacquering purposes.Type: GrantFiled: August 24, 1976Date of Patent: August 1, 1978Assignee: Dr. Beck & Co., AGInventors: Harald Janssen, Ferdinand Hansch
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Patent number: 3950452Abstract: A weather-resistant high-voltage electrical insulator appliance, or at least a portion thereof which is exposed to the atmosphere, is formed of a solvent-free aliphatic polyurethane which is at least substantially free of aromatic groups.Type: GrantFiled: January 21, 1972Date of Patent: April 13, 1976Assignee: Dr. Beck & Co. AGInventors: Karl Schmidt, Gerhard Boockmann