Patents by Inventor Walter Von Hellens
Walter Von Hellens 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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Publication number: 20080242771Abstract: The present invention relates to a method of improving the hardness and abrasion resistance while maintaining the useful dynamic properties inherent to butyl based tire tread compounds by adding HXNBR to a rubber composition comprising at least one butyl elastomer for a tire tread, in particular a tire tread suitable for a pneumatic tire.Type: ApplicationFiled: December 10, 2004Publication date: October 2, 2008Inventors: Kevin Kulbaba, Rui Resendes, Carl Walter Von Hellens
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Patent number: 7235601Abstract: The present invention relates to polymer composites containing at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50–30 at least one filler and optionally at least one cross-linking agent, a process for preparing said polymer composite wherein at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50–30, at least one filler and optionally at least one cross-linking agent are mixed and a process for the manufacture of a shaped article including the step of injection molding a polymer composite containing at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50-30, at least one filler and at least one cross-linking agent.Type: GrantFiled: October 14, 2003Date of Patent: June 26, 2007Assignee: Lanxess Inc.Inventors: Frederic Guerin, Ezio Campomizzi, Lorenzo Ferrari, Janet Gamlin, Richard Pazur, Carl Walter von Hellens
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Patent number: 7030193Abstract: The present invention relates to a polymer composite containing at least one carboxylated nitrile rubber polymer, that is optionally hydrogenated, at least one basic compound, at least one polyhalogenated hydrocarbon, optionally at least one filler and optionally at least one cross-linking agent, a process for preparing said polymer composite wherein at least one carboxylated nitrile rubber polymer, that is optionally hydrogenated, at least one basic compound, at least one polyhalogenated hydrocarbon, optionally at least one filler and optionally at least one cross-linking agent are mixed and a shaped article containing diester bridges formed by reaction of at least one carboxylated nitrile rubber polymer, that is optionally hydrogenated, at least one basic compound and at least one polyhalogenated hydrocarbon.Type: GrantFiled: June 22, 2004Date of Patent: April 18, 2006Assignee: Bayer Inc.Inventors: Frederic Guerin, Carl Walter Von Hellens, Sharon X. Guo
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Patent number: 6794452Abstract: Polymeric materials that differ from each other in solubility parameters and other properties are covulcanized by reaction with a hydrogenated carboxylated nitrile rubber, a multivalent salt of an organic acid and a curing agent.Type: GrantFiled: July 15, 2002Date of Patent: September 21, 2004Assignee: Bayer Inc.Inventor: Carl Walter von Hellens
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Publication number: 20040110888Abstract: The present invention relates to polymer composites containing at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50-30 at least one filler and optionally at least one cross-linking agent, a process for preparing said polymer composite wherein at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50-30, at least one filler and optionally at least one cross-linking agent are mixed and a process for the manufacture of a shaped article including the step of injection molding a polymer composite containing at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50-30, at least one filler and at least one cross-linking agent.Type: ApplicationFiled: October 14, 2003Publication date: June 10, 2004Inventors: Frederic Guerin, Ezio Campomizzi, Lorenzo Ferrari, Janet Gamlin, Richard Pazur, Carl Walter von Hellens
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Publication number: 20030181558Abstract: The invention relates to novel crosslinkable carboxylated nitrile rubber compositions that also comprise a multivalent salt of an organic acid and a peroxide crosslinking agent. The compositions may also contain nitrile rubber in admixture with the carboxylated nitrile rubber. The rubber may be hydrogenated. Cured compositions made from the crosslinkable compositions display improved properties, particularly an unexpectedly high modulus.Type: ApplicationFiled: March 12, 2003Publication date: September 25, 2003Inventor: Carl Walter von Hellens
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Patent number: 6602962Abstract: Disclosed herein is a process for the production of hydrogenated nitrile rubber. The appearance of corrosion in the plant equipment in which hydrogenated nitrile rubber is produced is due to the unexpected presence of relatively large amounts of HCl, generated, surprisingly, by the hydro-dehalogenation of the monochlorobenzene solvent under the reaction conditions. The addition of a compatible weakly basic additive, such as Epoxidized Soy Bean Oil (ESBO), to the reaction mixture has alleviated this serious problem.Type: GrantFiled: December 19, 2001Date of Patent: August 5, 2003Assignee: Bayer Inc.Inventors: Paul Nguyen, Carl Walter Von Hellens
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Publication number: 20030092843Abstract: Polymeric materials that differ from each other in solubility parameters and other properties are covulcanized by reaction with a hydrogenated carboxylated nitrile rubber, a multivalent salt of an organic acid and a curing agent.Type: ApplicationFiled: July 15, 2002Publication date: May 15, 2003Inventor: Carl Walter von Hellens
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Publication number: 20030065076Abstract: A novel elastomeric composition containing a hydrogenated carboxylated nitrile rubber, a hydrogenated nitrile rubber, a filler, a multivalent salt of an organic acid and a vulcanizing agent. The composition has good static and dynamic modulus and good abrasion resistance, and is suited for use in pads for tracks of tracked vehicles, for example military vehicles such as tanks.Type: ApplicationFiled: September 4, 2002Publication date: April 3, 2003Inventors: Carl Walter von Hellens, Sharon X. Guo, John Dato
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Publication number: 20020123574Abstract: Disclosed herein is a process for the production of hydrogenated nitrile rubber. The appearance of corrosion in the plant equipment in which hydrogenated nitrile rubber is produced is due to the unexpected presence of relatively large amounts of HCl, generated, surprisingly, by the hydro-dehalogenation of the monochlorobenzene solvent under the reaction conditions. The addition of a compatible weakly basic additive, such as Epoxidized Soy Bean Oil (ESBO), to the reaction mixture has alleviated this serious problem.Type: ApplicationFiled: December 19, 2001Publication date: September 5, 2002Inventors: Paul Nguyen, Carl Walter Von Hellens
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Patent number: 6407153Abstract: The invention relates to an elastoemeric composition which comprises: (I) a vinyl solution SBR/silica-containing masterbatch, which contains preferably from 40 to 120 parts by weight of silica per 100 parts by weight of polymer, and (ii) a high cis polybutadiene/silica-containing masterbatch, which contains preferably from 40 to 120 parts by weight of silica per 100 parts by weight of polymer wherein silica has been hydrophobicized.Type: GrantFiled: March 16, 2000Date of Patent: June 18, 2002Assignee: Bayer Inc.Inventor: Carl Walter von Hellens
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Patent number: 6380291Abstract: Rubber compositions comprising an acrylate or methacrylate salt, an elastomer curable with a peroxide initiator and a plasticizer having one or more epoxide groups per molecule display lower compound Mooney viscosity, higher MH/modulus, increased hardness and improved odour.Type: GrantFiled: September 28, 1999Date of Patent: April 30, 2002Assignee: Bayer Inc.Inventor: Carl Walter von Hellens
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Publication number: 20010009948Abstract: The invention provides a process for preparing a filled halobutyl elastomer which comprises admixing a halobutyl elastomer, particles of filler and a silane that has at least one hydroxyl group or hydrolysable group attached to a silicon atom of the silane, and curing the filled halobutyl elastomer with sulphur. The invention also provides a filled composition that has improved properties when compared with known carbon black filled elastomeric compositions.Type: ApplicationFiled: December 20, 2000Publication date: July 26, 2001Inventors: William Hopkins, Carl Walter von Hellens, Ahti Koski, John Rausa
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Publication number: 20010004660Abstract: A polymer composition useful to produce a vulcanizate having improved compound scorch safety is described. The polymer composition includes three components. The first component is a polymer selected from the group comprising nitrile polymers and ethylene polymers. The second component is a salt of a strong base and a weak acid, the salt comprising a metal selected from Group I of the Periodic Table of Elements. The third component is a vulcanization system comprising an inorganic peroxide compound and a sulfur containing compound. The polymer compositions may further comprise optional ingredients such as one or more of: a polycarbodiimide and a filler. Vulcanizates produced from the polymer composition have a surprising and unexpected combination of properties.Type: ApplicationFiled: December 12, 2000Publication date: June 21, 2001Inventor: Carl Walter von Hellens
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Patent number: 5693712Abstract: A process is provided for making improved rubbery vulcanizates wherein rubbery polymer is mixed with silica or silica and carbon black, polyfunctional polysulphide silane compound and sulphur-based vulcanizaiton agents and the mixture is vulcanized, the rubber polymer is a polymer having two or three domains or a mixture of a polymer having two or three domains and one of polybutadiene, styrene-butadiene polymer or natural rubber or a mixture of polybutadiene and natural rubber.Type: GrantFiled: November 29, 1995Date of Patent: December 2, 1997Assignee: Bayer Inc.Inventors: Paul Carl Urban, Walter Von Hellens
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Patent number: 4721749Abstract: Rubber compositions for use in tire tread compounds comprise co-vulcanizable blends of high 1,2 (vinyl) content polybutadiene of high molecular weight and high cis-1,4-poly-butadiene of high molecular weight. The blends show a high degree of homogeneity, so that they act effectively as a single polymer, and exhibit a substantial absence of a glass transition temperature. Both of the polymers in the composition should have a relatively high weight average molecular weight. The relative amounts of the two polymers are such as to obtain a 1,2-group content in the blend of from 35-65 percent (i.e. from 35-65 percent of the polymer units are in the 1,2-configuration). The blend may be compounded with conventional compounding ingredients for curing purposes, and optionally with additional polymers as natural rubber and/or SBR. The vulcanizates of the compositions exhibit a superior and unexpected balance of resilience, traction and wear properties.Type: GrantFiled: September 29, 1986Date of Patent: January 26, 1988Assignee: Polysar LimitedInventors: Joseph Odar, Walter Von Hellens
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Patent number: 4645793Abstract: Elastomeric compositions containing EPDM elastomers are provided, the vulcanizates of which show substantially improved adhesion properties with good dynamic ozone resistance, superior aged fatigue life and high resilience. The EPDM used is of high molecular weight and has a non-conjugated diene content of at least 6 weight percent preferably at least 7.5%. The composition also contains highly unsaturated elastomers, such as natural rubber and polybutadiene, as the additional elastomeric components.Type: GrantFiled: December 19, 1985Date of Patent: February 24, 1987Assignee: Polysar LimitedInventors: Walter Von Hellens, Sheikh A. H. Mohammed, Robert Hallman