Patents by Inventor David Bruce Hall
David Bruce Hall 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: 7928154Abstract: A method for preparing a polymer-organoclay composite composition comprises combining a solvent and an unexfoliated organoclay to provide a first mixture, wherein the unexfoliated organoclay comprises alternating inorganic silicate layers and organic layers, and has an initial spacing between the silicate layers; exposing the first mixture to an energized condition of a sufficient intensity and duration to increase the initial spacing of the inorganic silicate layers, to provide a second mixture; contacting the second mixture with a polymer composition so that the polymer composition fills at least one region located between at least one pair of silicate layers, wherein the polymer composition is at least partially soluble in the solvent; and removing at least a portion of the solvent from the second mixture, wherein the inorganic silicate layers remain separated by the polymer after removal of the solvent.Type: GrantFiled: June 21, 2007Date of Patent: April 19, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Kwok Pong Chan, Sarah Elizabeth Genovese, Erik C. Hagberg, David Bruce Hall, John Lester Maxam, Tara J. Mullen, Roy Ray Odle, Albert Santo Stella, James Mitchell White
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Patent number: 7842188Abstract: Disclosed is a method for removing a neutral or an ionic guanidine compound from aqueous media optionally comprising an alkali metal halide, wherein the method is selected from the group consisting of (a) adsorption onto a carbonaceous adsorbent, (b) adsorption onto a clay adsorbent, (c) filtration through a nanofiltration membrane, and (d) removal of water and calcination.Type: GrantFiled: March 12, 2007Date of Patent: November 30, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: David Bruce Hall, Thomas Link Guggenheim, James Manio Silva, Farid Fouad Khouri, Matthew Hal Littlejohn, Balakrishnan Ganesan, Ashok Shankrappa Shyadligeri, Pradeep Jeevaji Nadkarni
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Publication number: 20100247321Abstract: An article including a metallic substrate is presented. The article further includes a sacrificial layer disposed on a surface of the substrate and an anti-fouling layer disposed on the sacrificial layer. The anti-fouling layer includes a metal-polymer composite. An article including an anti-fouling layer having a nitride is also presented.Type: ApplicationFiled: March 31, 2010Publication date: September 30, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Ambarish Jayant Kulkarni, David Bruce Hall, James Anthony Ruud, Guruprasad Sundararajan, Dalong Zhong
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Publication number: 20100160578Abstract: The present invention provides a process for measuring and controlling chemical reactions that produce thermoplastic polymers by utilizing a stoichiometry correction during a reaction cycle to produce thermoplastic resins with desired properties. The thermoplastic polymer is made from at least one first monomer having a first reactive end group and at least one second monomer having a second reactive end group by reaction of the first reactive end group with the second reactive end group and has a glass transition temperature of greater than 130° C.Type: ApplicationFiled: December 19, 2008Publication date: June 24, 2010Applicant: SABIC INNOVATIVE PLASTICS IP B.V.Inventors: Roy Ray Odle, Vijay Gopalakrishnan, Narayan Ramesh, Albert Santo Stella, Lioba Maria Kloppenburg, David Bruce Hall
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Patent number: 7732559Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.Type: GrantFiled: July 18, 2008Date of Patent: June 8, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Alois Koch, Bernd Volker Demuth, Thomas Wessel, Karl Ernst Mack, Prashant Anil Tatake, Uptal Mahendra Vakil, Shyamal Bhaskar Gondkar, John Edward Pace, Kwang Woong Won
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Patent number: 7605222Abstract: Copolyetherimides compositions having high glass transition temperatures and outstanding ductility are presented. The copolyetherimides having Mw of at least 40,000 comprising isomeric bis(phthalimide) structural units within a relatively narrow range of isomer proportions exhibited Tgs of at least 240° C. and outstanding Notched Izod values. The copolyetherimides comprise oxydianiline residues and structural units of the formulas (I) and (II) (III).Type: GrantFiled: August 22, 2005Date of Patent: October 20, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Qing Ye, David Bruce Hall, William David Richards, Daniel Joseph Brunelle, Havva Yagci Acar
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Publication number: 20090163691Abstract: A method for the purification of aromatic polyether polymers prepared by a halide displacement polymerization process comprises adsorbing the catalyst with an alkali metal halide to form an adsorbent component and then removing the adsorbent component. Mixtures resulting from this method are also discussed.Type: ApplicationFiled: December 21, 2007Publication date: June 25, 2009Applicant: SABIC INNOVATIVE PLASTICS IP B.V.Inventors: Beatriz Penalver Bernabe, Thomas Guggenheim, David Bruce Hall, Norman Johnson, Juan Justino Rodriguez Ordonez, David Woodruff
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Patent number: 7541489Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.Type: GrantFiled: June 29, 2005Date of Patent: June 2, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Alois Koch, Bernd Volker Demuth, Thomas Wessel, KarlErnst Mack, Prashant Anil Tatake, Utpal Mahendra Vakil, Shyamal Bhaskar Gondkar, John Edward Pace, Kwang Woong Won
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Publication number: 20080319161Abstract: A method for purifying a polymer comprising providing a first mixture comprising at least one solvent and at least one polymeric material, diluting the first mixture with veratrole to produce a second mixture in which the polymeric material is substantially dissolved at a temperature less than 100° C., performing at least one step selected from (i) contacting the second mixture with an aqueous wash solution, and (ii) filtering the second mixture.Type: ApplicationFiled: June 22, 2007Publication date: December 25, 2008Applicant: GENERAL ELECTRIC COMPANYInventor: David Bruce Hall
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Publication number: 20080319210Abstract: A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4?-oxybisphthalic anhydride (4,4?-ODPA), which are substantially free of residual phase transfer catalyst.Type: ApplicationFiled: September 2, 2008Publication date: December 25, 2008Inventors: Albert Santo Stella, David Bruce Hall
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Publication number: 20080275211Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.Type: ApplicationFiled: July 18, 2008Publication date: November 6, 2008Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Alois Koch, Bernd Volker Demuth, Thomas Wessel, Karl Ernst Mack, Prashant Anil Tatake, Utpal Mahendra Vakil, Shyamal Bhaskar Gondkar, John Edward Pace, Kwang Woong Won
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Patent number: 7446214Abstract: A method for purifying dianhydrides is provided. In one aspect, purified oxybisphthalic anhydrides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalic anhydrides, such as 4,4?-oxybisphthalic anhydride (4,4?-ODPA), which are substantially free of residual phase transfer catalyst.Type: GrantFiled: November 22, 2006Date of Patent: November 4, 2008Assignee: SABIC Innovative Plastics IP B.V.Inventors: Albert Santo Stella, David Bruce Hall
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Patent number: 7411032Abstract: A method for making polyetherimides is provided by reacting a high purity dianhydride with an aromatic diamine under condensation polymerization conditions. The dianhydrides employed are purified by a method comprising contacting a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst, with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purified dianhydrides are then condensed with aromatic diamines to provide polyetherimide compositions which are substantially free of residual phase transfer catalyst.Type: GrantFiled: November 21, 2006Date of Patent: August 12, 2008Assignee: SABIC Innovative Plastics IP B.V.Inventors: Albert Santo Stella, David Bruce Hall
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Patent number: 7408070Abstract: A method for purifying bisimides is provided. In one aspect, purified oxybisphthalimides, intermediates useful in the preparation of polyetherimides are provided. In one embodiment, a first solution containing a bisimide compound, a solvent, and a phase transfer catalyst is contacted with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the bisimide compound is then separated from the solid inorganic adsorbent material to provide a purified bisimide compound which is substantially free of the phase transfer catalyst. The purification technique is especially valuable for preparing high purity oxybisphthalimides, such as 4,4?-oxybis(N-methylphthalimide), which are substantially free of residual phase transfer catalyst.Type: GrantFiled: November 22, 2006Date of Patent: August 5, 2008Assignee: SABIC Innovative Plastics IP B.V.Inventors: Albert Santo Stella, David Bruce Hall
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Patent number: 6790934Abstract: Aromatic polyethers are prepared by displacement polymerization reaction in the presence of a water-immiscible solvent with boiling point at atmospheric pressure of greater than 110° C. and a density ratio to water of greater than 1.1:1 at 20-25° C. The polyethers are purified by processes comprising aqueous extraction, or filtration, or a combination thereof.Type: GrantFiled: December 21, 2001Date of Patent: September 14, 2004Assignee: General Electric CompanyInventors: Norman Enoch Johnson, Raul Eduardo Ayala, Thomas Joseph Fyvie, Amy Rene Freshour, David Winfield Woodruff, Peter David Phelps, Ganesh Kailasam, Paul Edward Howson, Elliott West Shanklin, Lioba Maria Kloppenburg, David Bruce Hall, Pradeep Jeevaji Nadkarni, Daniel Joseph Brunelle
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Patent number: 6657067Abstract: A method for the manufacture of chlorophthalic acid by liquid phase oxidation of chloro-ortho-xylene is disclosed. The chlorophthalic acid may be dehydrated to form chlorophthalic anhydride which is useful in the synthesis of polyetherimide.Type: GrantFiled: March 22, 2002Date of Patent: December 2, 2003Assignee: General Electric CompanyInventors: Robert Edgar Colborn, David Bruce Hall, Peter Koch, Gerald Oeckel
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Patent number: 6657068Abstract: A method for the manufacture of halophthalic acid by liquid phase oxidation of halo-ortho-xylene is disclosed. The halophthalic acid may be dehydrated to form halophthalic anhydride which is useful in the synthesis of polyetherimide.Type: GrantFiled: March 22, 2002Date of Patent: December 2, 2003Assignee: General Electric CompanyInventors: Robert Edgar Colborn, David Bruce Hall, Peter Koch, Gerald Oeckel
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Patent number: 6649773Abstract: A method for the manufacture of halophthalic acid by liquid phase oxidation of halo-ortho-xylene is disclosed. The halophthalic acid may be dehydrated to form halophthalic anhydride which is useful in the synthesis of polyetherimide.Type: GrantFiled: March 22, 2002Date of Patent: November 18, 2003Assignee: General Electric CompanyInventors: Robert Edgar Colborn, David Bruce Hall, Peter Koch, Gerald Oeckel
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Publication number: 20030181757Abstract: A method for the manufacture of halophthalic acid by liquid phase oxidation of halo-ortho-xylene is disclosed. The halophthalic acid may be dehydrated to form halophthalic anhydride which is useful in the synthesis of polyetherimide.Type: ApplicationFiled: March 22, 2002Publication date: September 25, 2003Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Koch, Gerald Oeckel
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Publication number: 20030181756Abstract: A method for the manufacture of chlorophthalic acid by liquid phase oxidation of chloro-ortho-xylene is disclosed. The chlorophthalic acid may be dehydrated to form chlorophthalic anhydride which is useful in the synthesis of polyetherimide.Type: ApplicationFiled: March 22, 2002Publication date: September 25, 2003Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Koch, Gerald Oeckel