Patents by Inventor Helmut Scheckenbach
Helmut Scheckenbach 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).
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Patent number: 6682812Abstract: Powders of oxidized polyarylene sulfide and powders comprising from 1 to 99% by weight of oxidized polyarylene sulfide and from 1 to 99% by weight of a metal, carbide, ceramic or high temperature polyimide, polyamide imide, polyester imide and aromatic polyester plastic, or a mixture thereof are very suitable for use in thermal spraying and thereby form coatings having a strong chemical and mechanical resistance and high dimensional stability when exposed to high and low temperatures. Such coatings are advantageous for use as abradable seal clearance control coating in the compressor section of gas turbine engines, motor vehicle turbochargers and superchargers, and for use as a coating of reaction vessels, kitchen ware, sealings or bearings.Type: GrantFiled: January 2, 2002Date of Patent: January 27, 2004Assignee: Ticona GmbHInventors: Dl. Helmut Scheckenbach, Christophr William Smith
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Publication number: 20020064667Abstract: Powders of oxidized polyarylene sulfide and powders comprising from 1 to 99% by weight of oxidized polyarylene sulfide and from 1 to 99% by weight of a metal, carbide, ceramic or high temperature polyimide, polyamide imide, polyester imide and aromatic polyester plastic, or a mixture thereof are very suitable for use in thermal spraying and thereby form coatings having a strong chemical and mechanical resistance and high dimensional stability when exposed to high and low temperatures. Such coatings are advantageous for use as abradable seal clearance control coating in the compressor section of gas turbine engines, motor vehicle turbochargers and superchargers, and for use as a coating of reaction vessels, kitchen ware, sealings or bearings.Type: ApplicationFiled: January 2, 2002Publication date: May 30, 2002Inventors: Dl. Helmut Scheckenbach, Christopher William Smith
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Patent number: 6369172Abstract: The invention relates to a process for using nitric acid to oxidize polyarylene sulfide to polyarylene sulfoxide, oxidizing at least 98% of the sulfide groups of the polyarylene sulfide to sulfoxide groups. According to the invention polyarylene sulfide is treated with nitric acid at a concentration of from 60 to 80% with heating. The polyarylene sulfoxide prepared by the novel process can be used as an excellent chemical blowing agent for foaming thermoplastics.Type: GrantFiled: April 12, 2000Date of Patent: April 9, 2002Assignee: Ticona GmbHInventors: Dirk Zierer, Helmut Scheckenbach, Michael Dierolf
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Patent number: 6365274Abstract: Powders of oxidized polyarylene sulfide and powders comprising from 1 to 99% by weight of oxidized polyarylene sulfide and from 1 to 99% by weight of a metal, carbide, ceramic or high temperature polyimide, polyamide imide, polyester imide and aromatic polyester plastic, or a mixture thereof are very suitable for use in thermal spraying and thereby form coatings having a strong chemical and mechanical resistance and high dimensional stability when exposed to high and low temperatures. Such coatings are advantageous for use as abradable seal clearance control coating in the compressor section of gas turbine engines, motor vehicle turbochargers and superchargers, and for use as a coating of reaction vessels, kitchen ware, sealings or bearings.Type: GrantFiled: February 25, 1999Date of Patent: April 2, 2002Assignee: Ticona GmbHInventors: DI. Helmut Scheckenbach, Christopher William Smith
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Patent number: 6262224Abstract: Polyaryiene sulfone fiber material, especially web, is obtained by oxidizing polyarylene sulfide fiber material with a peracid/acid mixture of an organic acid at 60 to 100° C. for 10 seconds to 45 minutes. Since this process provides a substantative degree of oxidation within a very short reaction time, one advantage of the process is that the rapidity of the oxidation renders continuous processes for oxidizing polyarylene sulfide fibers economical.Type: GrantFiled: April 12, 2000Date of Patent: July 17, 2001Assignee: Ticona GmbHInventors: Dirk Zierer, Martin Brück, Helmut Scheckenbach
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Patent number: 6184293Abstract: The invention relates to a molding composition based on fluoropolymers which additionally contain from 1 to 50% by weight of at least one polymer containing sulfoxide groups. The polymer containing sulfoxide groups comprises, in particular, polyarylene sulfoxide units of the formula: —(—C6H4—SO—)—.Type: GrantFiled: July 28, 1997Date of Patent: February 6, 2001Assignee: Hoechst AGInventors: Axel Schönfeld, Andreas Schleicher, Georg Frank, Helmut Scheckenbach
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Patent number: 6133357Abstract: Polymer mixtures comprising at least one thermoset and at least one oxidized polyarylene sulfide have particularly good tribological behavior. Oxidized polyarylene sulfides used in these mixtures are polyarylene sulfones or oxidized polyarylene sulfides in which at least 10% of the sulfur bridges have been converted to sulfone bridges. Polyphenylene sulfone is employed with preference. The polymer mixtures are used to produce gearwheels, gear racks, bearings, chains, wheels or gasket materials.Type: GrantFiled: March 4, 1998Date of Patent: October 17, 2000Assignee: Ticona GmbHInventor: Helmut Scheckenbach
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Patent number: 6100327Abstract: Polymeric coating systems comprising an oxidized polyarylene sulfide, especially polyarylene sulfone or partially oxidized polyarylene sulfide, are of improved abrasion resistance. The coating systems preferably comprise a polymer, a binder resin and oxidized polyarylene sulfide, and are suspended in a liquid vehicle. The coating systems are used for coating the surface of metallic and nonmetallic substrates.Type: GrantFiled: October 16, 1998Date of Patent: August 8, 2000Assignee: Ticona GmbHInventor: Helmut Scheckenbach
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Patent number: 6074740Abstract: Metallized moldings of polymer mixtures comprise a thermoplastic and a filler. The thermoplastic polymer has a melting point of more than 100.degree. C. and may be selected from the group consisting of fluoropolymers, polyamides, polycarbomates, polyesters, polyimides, liquid crystalline polymers, polymethyl methacrylates, polyphenylene oxides, polysulfones, polyurethanes and silicones. The filler may comprise oxidized polyarylene sulfide polyarylene sulfide, polyimide, aromatic polyester, or polyether ketone.Type: GrantFiled: January 23, 1997Date of Patent: June 13, 2000Assignee: Hoechst AktiengesellschaftInventors: Helmut Scheckenbach, Georg Frank
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Patent number: 6046285Abstract: Polymer blends obtainable by thermal treatment, at not less than 150.degree. C., of a mixture containing at least one high-performance polymer and from 15 to 99 parts by weight or preferably from 40 to 90 parts by weight and particularly preferably from 55 to 75 parts by weight, of a polymer containing sulfoxide groups, and crosslinked or partly crosslinked polymer blend obtainable by thermal treatment, at not less than 150.degree. C., of a mixture containing at least one of the high-performance polymers polyesters, partly fluorinated polymers, polyethersulfones, polysulfones, polyetherimides, polyamidoimides or polyacetals and at least one polymer containing sulfoxide groups, are distinguished by high thermal and chemical stability. Polymers containing sulfoxide groups are polyarylene sulfoxides, in particular polyphenylene sulfoxide. The polymer blends are used for the production of fibers, films or shaped articles.Type: GrantFiled: September 3, 1997Date of Patent: April 4, 2000Assignee: Hoechst AktiengesellschaftInventor: Helmut Scheckenbach
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Patent number: 6025440Abstract: A blend of at least one fluorine polymer, at least one oxidized polyarylene sulfide, at least one polyarylene sulfide and, if required, conventional additives results in a reduction in the expulsion of the oxidized polyarylene sulfides in gaseous form in the production of shaped articles from this blend, so that no cracks occur in the shaped article and problem-free processing by a cutting method is permitted.Type: GrantFiled: December 18, 1997Date of Patent: February 15, 2000Assignee: Hoechst AktiengesellschaftInventors: Helmut Scheckenbach, Gregor Buche
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Patent number: 6013761Abstract: A process for the preparation of polyarylene sulfoxides, in which polyarylene sulfide, suspends in a concentrated acid of formula R--SO.sub.3 H, in which R is a halogen atom Ian OH group, an aliphatic radical having 1 to 6 C atoms or an aromatic radcal having 6 to 18 C atoms, or of the formula R.sup.1 --CR.sup.2 R.sup.3 --COOH, in which R.sup.1 is a halogen atom and R.sup.2 and R.sup.3, independently of one another are each a halogen atom, an aliphatic radical having 1 to 50 atoms or a halogenated aliphatic radical having 1 to 5 C atoms, is oxidized by metering in a 30 to 85% strength hydrogen peroxide solution with thorough mixing and at a temperature of from -20 to +45.degree. C. According to this process, the sulfide units of the polyarylene sulfide are converted virtually selectively and completely into sulfoxide units.Type: GrantFiled: November 19, 1998Date of Patent: January 11, 2000Assignee: Ticona GmbHInventors: Dirk Zierer, Helmut Scheckenbach
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Patent number: 6005037Abstract: A molding material which contains a sinterable polymer and a wax as a binder and advantageously an ethylene/vinyl acetate copolymer, an organic peroxide, an azoester and an alcohol can be injection molded to give a molding, dewaxed without loss of dimensional stability of the molding and then sintered.Type: GrantFiled: October 27, 1995Date of Patent: December 21, 1999Assignee: Hoechst AGInventors: Helmut Scheckenbach, Andreas Schleicher, Michael Bayer
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Patent number: 5948830Abstract: The novel blend comprises:(A) from 1 to 99% by weight of at least one thermotropic-liquid-crystalline polyester and/or polyesteramide and(B) from 1 to 99% by weight of at least one sulfoxide group-containing polymer,in each case based on the total weight .SIGMA.?(A)+(B)!. Component (B) is a linear and/or branched polymer having a mean molecular weight M.sub.w in the range from 4,000 to 200,000 comprising recurring units of the formula ?--F--S).sub.c --(F--SO).sub.d --!, where F, independently of one another, are simple or para-, meta- or ortho-linked arylene systems having 6 to 18 carbon atoms, preferably phenylene, naphthylene or biphenylene, where the sum c+d is 1, with the proviso that d is always .gtoreq.0.70. Component (A) is a thermotropic liquid-crystalline polymer having a mean molecular weight M.sub.w in the range from 10,000 to 200,000 g/mol and a transition temperature of >250.degree. C., and/or an amorphous thermotropic liquid-crystalline polymer having a mean molecular weight M.sub.Type: GrantFiled: May 2, 1997Date of Patent: September 7, 1999Assignee: Ticona GmbHInventors: Helmut Scheckenbach, Dirk Raudies, Andreas Schleicher, Georg Frank
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Patent number: 5907029Abstract: The invention relates to polyarylene sulfoxides which are soluble in polar organic solvents, a process for their preparation and their use. Soluble polyarylene sulfoxides can be prepared by homogeneous partial oxidation of polyarylene sulfides. The homogeneous partial oxidation is achieved by dispersing the polyarylene sulfide in finely divided form in a solvent stable to oxidation, slowly adding a mild oxidizing agent and terminating the oxidation as soon as the polymer chains have reached a uniform degree of oxidation. The partially oxidized polyarylene sulfoxides are suitable for the production of coatings and shaped articles, such as fibers, membranes, films and nonwovens.Type: GrantFiled: September 16, 1997Date of Patent: May 25, 1999Assignee: Hoechst AktiengesellschaftInventors: Stefan Disch, Michael Haubs, Axel Schonfeld, Helmut Scheckenbach
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Patent number: 5891988Abstract: The process for the preparation of polyarylene sulfones by oxidation of polyarylene sulfides with an oxidizing agent in the presence of a liquid is carried out under reduced pressure so that the liquid boils. The reaction temperature can easily be kept constant in the process.Type: GrantFiled: September 9, 1997Date of Patent: April 6, 1999Assignee: Ticona GmbHInventors: Helmut Scheckenbach, Klaus Delpy, Stefan Disch
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Patent number: 5864095Abstract: An abrasion-resistant fluoropolymer mixture comprising(A) from 75 to 99% by weight of a fluorocarbon polymer(B) from 1 to 25% by weight of an oxidized polyarylene sulfide and, based on the sum (A)+(B),(C) from 0 to 15% by weight of a filler,is used for the production of feed pipes for Bowden cables which are pressure-resistant and abrasion-resistant.Type: GrantFiled: December 11, 1997Date of Patent: January 26, 1999Assignee: Ticona GmbHInventors: Helmut Scheckenbach, Andreas Schleicher, Jurgen Kulpe, Wolfgang Neumann, Bernd Jansen
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Patent number: 5852139Abstract: Polymer mixtures which comprise at least one thermoplastic and at least one oxidized polyarylene sulfide show particularly good tribological behaviour. The thermoplastics of the mixture are, for example, polyacetal, polyester, liquid-crystalline polymer, polyaryl ether ketone, polysulfone, polyether sulfone, polyphenylene sulfide or polyether imide. The oxidized polyarylene sulfide is preferably polyphenylene sulfone. The polymer mixtures are used for producing gear wheels, gear racks, bearings, chains, pulleys, rollers, wheels or gasket materials.Type: GrantFiled: April 8, 1997Date of Patent: December 22, 1998Assignee: Ticona GmbHInventor: Di Helmut Scheckenbach
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Patent number: 5789452Abstract: A foamed polyarylene sulfide according to the invention has a density which is reduced by at least 50% compared with the theoretical density of nonfoamed material, and is expediently produced by subjecting a polyarylene sulfoxide as such or a mixture of one or more polyarylene sulfides with a polyarylene sulfoxide to heat treatment. The temperature of the heat treatment is in the range from 250.degree. to 400.degree. C.Type: GrantFiled: October 21, 1997Date of Patent: August 4, 1998Assignee: Ticora GmbHInventors: Georg Frank, Jurgen Kulpe, Andreas Schleicher, Helmut Scheckenbach
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Patent number: 5786397Abstract: Molding compositions or mixtures comprising a high-temperature-resistant polymer and at least one polymer containing sulfoxide groups are used for the production of a foam by exposure to heat. The foam is employed for heat-resistant insulating layers.Type: GrantFiled: July 29, 1997Date of Patent: July 28, 1998Assignee: Hoechst AktinegesellschaftInventors: Helmut Scheckenbach, Axel Schonfeld, Siegfried Weis