Patents by Inventor John W. Weston
John W. Weston 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: 20230312803Abstract: Embodiments relate to a coating, adhesive, sealant, elastomer, or reaction injection molded material forming polyurethane composition that comprises an isocyanate component that includes at least one isocyanate-terminated prepolymer, and an isocyanate reactive component that includes at least one Lewis acid catalyst polymerized polyether polyol having a weight average molecular weight from 200 g/mol to 1,000 g/mol, an average primary hydroxyl group content of at least 30%, and an average acetal content of at least 0.05 wt %.Type: ApplicationFiled: October 19, 2021Publication date: October 5, 2023Inventors: Masayuki Suzuki, Arjun Raghuraman, John W. Weston, An Kaga, Richard J. Keaton, Adrian J. Birch, Maria Jose Cotanda Santapau
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Patent number: 10767009Abstract: Polyether polyols are made by a process that includes a continuous addition of starter and alkylene oxide. The feed of starter is discontinued when 80 to 95% of the alkylene oxide has been fed to the reactor. This process produces a product with a narrow molecular weight distribution.Type: GrantFiled: June 20, 2016Date of Patent: September 8, 2020Assignee: Covestro LLCInventors: Jean-Paul Masy, Carlos M. Villa, David A. Babb, John W. Weston, Sweta Somasi
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Publication number: 20180237587Abstract: Polyether polyols are made by a process that includes a continuous addition of starter and alkylene oxide. The feed of starter is discontinued when 80 to 95% of the alkylene oxide has been fed to the reactor. This process produces a product with a narrow molecular weight distribution.Type: ApplicationFiled: June 20, 2016Publication date: August 23, 2018Inventors: Jean-Paul Masy, Carlos M. Villa, David A. Babb, John W. Weston, Sweta Somasi
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Patent number: 9708448Abstract: 1,2-butylene oxide is homopolymerized or randomly copolymerized in the presence of a double metal cyanide catalyst such as a zinc hexacyanocobaltate catalyst complex. The polymers unexpectedly contain significant amounts of monofunctional impurities, which can be partially controlled through selection of polymerization conditions.Type: GrantFiled: August 16, 2014Date of Patent: July 18, 2017Assignee: Dow Global Technologies LLCInventors: Jean-Paul Masy, Myriam Linke, David A. Babb, John W. Weston
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Patent number: 9637593Abstract: Organic materials are stripped and dried in a single column having two contact zones. A stripping gas is introduced into an upper contact zone and flows through the organic material in that zone. A drying gas is introduced into a lower contact zone. The drying gas contacts the organic material in both the upper and lower contact zones, and is removed from the top of the column together with the stripping gas. This process permits very efficiently removal of volatile organic compounds as well as efficient drying, while requiring on low levels of the stripping and drying gasses.Type: GrantFiled: February 17, 2016Date of Patent: May 2, 2017Assignee: Dow Global Technologies LLCInventors: Kevin C. Seavey, Walter C. Moore, John W. Weston, Carlos M. Villa
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Publication number: 20160215091Abstract: 1,2-butylene oxide is homopolymerized or randomly copolymerized in the presence of a double metal cyanide catalyst such as a zinc hexacyanocobaltate catalyst complex. The polymers unexpectedly contain significant amounts of monofunctional impurities, which can be partially controlled through selection of polymerization conditions.Type: ApplicationFiled: August 16, 2014Publication date: July 28, 2016Inventors: Jean-Paul Masy, Myriam Linke, David A. Babb, John W. Weston
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Publication number: 20160159978Abstract: Organic materials are stripped and dried in a single column having two contact zones. A stripping gas is introduced into an upper contact zone and flows through the organic material in that zone. A drying gas is introduced into a lower contact zone. The drying gas contacts the organic material in both the upper and lower contact zones, and is removed from the top of the column together with the stripping gas. This process permits very efficiently removal of volatile organic compounds as well as efficient drying, while requiring on low levels of the stripping and drying gasses.Type: ApplicationFiled: February 17, 2016Publication date: June 9, 2016Inventors: Kevin C. Seavey, Walter C. Moore, John W. Weston, Carlos M. Villa
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Method for continuously producing low equivalent weight polyols using double metal cyanide catalysts
Patent number: 9074044Abstract: Polyether polyols having equivalent weights of up to 500 are continuously prepared in the presence of a double metal cyanide catalyst. A first step of the reaction is performed at a temperature of at least 150° C., while controlling the hydroxyl content and unreacted alkylene oxide content of the reaction mixture to within certain ranges. A portion of that reaction mixture is withdrawn and permitted to react non-isothermally to consume the unreacted alkylene oxide. This process is highly efficient, does not result in catalyst deactivation, as is commonly seen in previous processes, and does not produce a significant ultra high molecular weight tail.Type: GrantFiled: December 6, 2010Date of Patent: July 7, 2015Assignee: Dow Global Technologies LLCInventors: John W. Weston, Carlos M. Villa, Jean-Paul Masy, Kevin C. Seavey -
Patent number: 8912364Abstract: The present disclosure relates, according to some embodiments, to compositions, apparatus, methods, and systems that may be used to produce polyols, for example, polyether polyols with a narrow range of molecular weights, with little if any unsaturated byproducts, in a sustained and/or continuous reaction, with efficient heat transfer, and/or at high production rates. For example, in some embodiments, teachings of the disclosure may be used to produce polyether polyols in a continuous loop flow process. A continuous loop flow process may be practiced such that heat is effectively transferred and/or product properties (e.g., range of molecular weights) are controllable. For example, a continuous loop flow process may use one or more continuous flow loops comprising a heat exchanger, a means to move material around each loop, inlets for catalyst, monomer, initiator or starter, and an outlet for polyol product.Type: GrantFiled: May 19, 2009Date of Patent: December 16, 2014Assignee: Dow Global Technologies LLCInventors: Carlos M. Villa, John W. Weston, Pradeep Jain, Leigh H. Thompson, Jean-Paul Masy
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Publication number: 20120279082Abstract: Organic materials are stripped and dried in a single column having two contact zones. A stripping gas is introduced into an upper contact zone and flows through the organic material in that zone. A drying gas is introduced into a lower contact zone. The drying gas contacts the organic material in both the upper and lower contact zones, and is removed from the top of the column together with the stripping gas. This process permits very efficiently removal of volatile organic compounds as well as efficient drying, while requiring on low levels of the stripping and drying gasses.Type: ApplicationFiled: September 21, 2010Publication date: November 8, 2012Inventors: Kevin C. Seavey, Walter C. Moore, John W. Weston, Carlos M. Villa
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METHOD FOR CONTINUOUSLY PRODUCING LOW EQUIVALENT WEIGHT POLYOLS USING DOUBLE METAL CYANIDE CATALYSTS
Publication number: 20120283483Abstract: Polyether polyols having equivalent weights of up to 500 are continuously prepared in the presence of a double metal cyanide catalyst. A first step of the reaction is performed at a temperature of at least 1500 C, while controlling the hydroxyl content and unreacted alkylene oxide content of the reaction mixture to within certain ranges. A portion of that reaction mixture is withdrawn and permitted to react non-isothermally to consume the unreacted alkylene oxide. This process is highly efficient, does not result in catalyst deactivation, as is commonly seen in previous processes, and does not produce a significant ultra high molecular weight tail.Type: ApplicationFiled: December 6, 2010Publication date: November 8, 2012Inventors: John W. Weston, Carlos M. Villa, Jean-Paul Masy, Kevin C. Seavey -
Publication number: 20110112332Abstract: Disclosed is an improvement to a polyether preparation process that includes a coalescing step. Amine-initiated polyethers prepared using a mixed alkylene oxide feed tend to coalesce significantly more slowly than glycerin-initiated polyethers, particularly in processes that include a holding step and/or elevated temperature following an initial alkoxylation to form a pre-polymer. This improvement is to perform a remedial end-capping of the pre-polymer, which may include amine degradation products, using an alkylene oxide which contains at least (3) carbons, prior to the molecular weight-building alkoxylation with the mixed alkylene oxide feed. The rate and performance of coalescing thereafter may be substantially enhanced.Type: ApplicationFiled: July 22, 2009Publication date: May 12, 2011Applicant: Dow Global Technologies Inc.Inventors: Sunil K. Chaudhary, Jean P. Chauvel, Christopher P. Christenson, Istvan Lengyel, James P. Cosman, John W. Weston, Katie Fischer, David A. McCrery
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Publication number: 20110105802Abstract: The present disclosure relates, according to some embodiments, to compositions, apparatus, methods, and systems that may be used to produce polyols, for example, polyether polyols with a narrow range of molecular weights, with little if any unsaturated byproducts, in a sustained and/or continuous reaction, with efficient heat transfer, and/or at high production rates. For example, in some embodiments, teachings of the disclosure may be used to produce polyether polyols in a continuous loop flow process. A continuous loop flow process may be practiced such that heat is effectively transferred and/or product properties (e.g., range of molecular weights) are controllable. For example, a continuous loop flow process may use one or more continuous flow loops comprising a heat exchanger, a means to move material around each loop, inlets for catalyst, monomer, initiator or starter, and an outlet for polyol product.Type: ApplicationFiled: May 19, 2009Publication date: May 5, 2011Inventors: Carlos M. Villa, John W. Weston, Pradeep Jain, Leigh H. Thompson, Jean-Paul Masy
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Publication number: 20080221281Abstract: A continuous process and system for producing polyether polyols that allows for continuously adding an unreacted oxide to a loop reactor while adding at least one thermally deactivating catalyst capable of thermally deactivating prior to decomposition of polyether polyol which can allow for greater concentrations of unreacted oxides and/or a rate of reaction in the loop reactor is at a rate at least two times faster than a rate of reaction in a loop reactor containing less than 14 weight percent unreacted oxide. In a preferred embodiment, the catalyst is a double metal cyanide catalyst and a plug flow reactor is formed in series with the loop reactor wherein neither reactor contains a vapor space.Type: ApplicationFiled: March 25, 2008Publication date: September 11, 2008Applicant: Dow Global Technologies Inc.Inventors: Jan W. Verwijs, Walter J. S. Papadopulos, John W. Weston, Richard J. Elwell, Carlos M. Villa
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Publication number: 20080125569Abstract: A polyether composition comprised of a polyether, a functionalizing catalyst and a metal cyanide catalyst is formed by forming a functionalized initiator compound by reacting a precursor initiator compound with a functionalizing compound and a functionalizing catalyst to form the functionalized initiator compound, forming a mixture of the functionalized initiator compound containing at least a portion of the functionalizing catalyst, an alkylene oxide and a metal cyanide catalyst complex, and subjecting the mixture to conditions sufficient to activate the catalyst complex and to alkoxylate the functionalized initiator compound to form the polyether. The functionalized initiator compound may be of a vegetable oil, animal fat or modified vegetable oil or modified animal fat. The functionalizing catalyst may be a tin, titanium, iodine, rhodium, nickel, acid or enzyme catalyst.Type: ApplicationFiled: October 24, 2005Publication date: May 29, 2008Inventors: Richard M. Wehmeyer, John W. Weston, Marlin E. Walters
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Patent number: 7378559Abstract: A continuous process and system for producing polyether polyols that allows for continuously adding an unreacted oxide to a loop reactor while adding at least one thermally deactivating catalyst capable of thermally deactivating prior to decomposition of polyether polyol which can allow for greater concentrations of unreacted oxides and/or a rate of reaction in the loop reactor is at a rate at least two times faster than a rate of reaction in a loop reactor containing less than 14 weight percent unreacted oxide. In a preferred embodiment, the catalyst is a double metal cyanide catalyst and a plug flow reactor is formed in series with the loop reactor wherein neither reactor contains a vapor space.Type: GrantFiled: March 5, 2004Date of Patent: May 27, 2008Assignee: Dow Global Technologies Inc.Inventors: Jan W. Verwijs, John W. Weston, Walter J. S. Papadopulos, Richard J. Elwell, Carlos M. Villa
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Patent number: 6642423Abstract: Ethoxylations of various initiator compounds are performed in the presence of metal cyanide catalysts. The catalysts surprisingly form a wide variety of polyether products that in most cases contain only small amounts of high molecular weight poly(ethylene oxide).Type: GrantFiled: April 24, 2002Date of Patent: November 4, 2003Assignee: Dow Global Technologies, Inc.Inventors: Katherine S. Clement, Louis L. Walker, Richard M. Wehmeyer, Robert H. Whitmarsh, David C. Molzahn, William P. Dianis, David E. Laycock, John W. Weston, Richard J. Elwell
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Publication number: 20020198413Abstract: Ethoxylations of various initiator compounds are performed in the presence of metal cyanide catalysts. The catalysts surprisingly form a wide variety of polyether products that in most cases contain only small amounts of high molecular weight poly(ethylene oxide).Type: ApplicationFiled: April 24, 2002Publication date: December 26, 2002Inventors: Katherine S. Clement, Louis L. Walker, Richard M. Wehmeyer, Robert H. Whitmarsh, David C. Molzahn, William P. Dianis, Daivd E. Laycock, John W. Weston, Richard J. Elwell
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Patent number: 5037941Abstract: Polycarbonate prepolymers are produced by adding phosgene, one or more dihydric phenols, a halogenated organic solvent, and an aqueous caustic solution together with mixing in motionless mixers to form fine dispersions of partially phosgenated phenols, allowing for interfacial reactions to occur in residence time sections and repeating the steps after the addition of caustic to form high molecular weight prepolymers. These prepolymers are then polymerized with amines to form high molecular weight polycarbonates.Type: GrantFiled: April 6, 1990Date of Patent: August 6, 1991Assignee: The Dow Chemical CompanyInventors: John W. Weston, Jose L. Aguilar, Ronald R. Smith, II
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Patent number: 4847352Abstract: Polycarbonate prepolymers are produced by adding phosgene, one or more dihydric phenols, a halogenated organic solvent, and an aqueous caustic solution together with mixing in motionless mixers to form fine dispersions of partially phosgenated phenols, allowing for interfacial reactions to occur in residence time sections and repeating the steps after the addition of caustic to form high molecular weight prepolymers. These prepolymers are then polymerized with amines to form high molecular weight polycarbonates.Type: GrantFiled: August 26, 1987Date of Patent: July 11, 1989Assignee: The Dow Chemical CompanyInventors: John W. Weston, Ronald R. Smith, II, Jose L. Aguilar