Patents by Inventor Michael M. Azad
Michael M. Azad 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: 10307732Abstract: The present invention relates to a fast particulate superabsorbent polymer composition comprising a polymer comprising a neutralized aluminum salt solution applied to the surface of a particulate superabsorbent polymer; wherein an aqueous solution of the neutralized aluminum salt has a pH value from about 5.5 to about 8; and subsequent to subjecting the particulate superabsorbent polymer composition to the Processing Test, the particulate superabsorbent polymer composition has a permeability stability index of from about 0.60 to about 0.99, and a compressibility from 1.30 mm2/N to about 4 mm2/N as measured by the Compression Test, and wherein the particulate superabsorbent polymer composition may have a Vortex time of from 25 to 60 seconds and absorbency under load at 0.9 psi of from 15 to 21 g/g.Type: GrantFiled: April 7, 2014Date of Patent: June 4, 2019Assignee: Evonik CorporationInventors: Gonglu Tian, Matthew Thomas Ondisco, David L. Bergman, Bernfried Messner, Scott J. Smith, Michael M. Azad, Mark Joy
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Publication number: 20160060418Abstract: The present invention relates to a fast particulate superabsorbent polymer composition comprising a polymer comprising a neutralized aluminum salt solution applied to the surface of a particulate superabsorbent polymer; wherein an aqueous solution of the neutralized aluminum salt has a pH value from about 5.5 to about 8; and subsequent to subjecting the particulate superabsorbent polymer composition to the Processing Test, the particulate superabsorbent polymer composition has a permeability stability index of from about 0.60 to about 0.99, and a compressibility from 1.30 mm2/N to about 4 mm2/N as measured by the Compression Test, and wherein the particulate superabsorbent polymer composition may have a Vortex time of from 25 to 60 seconds and absorbency under load at 0.9 psi of from 15 to 21 g/g.Type: ApplicationFiled: April 7, 2014Publication date: March 3, 2016Inventors: Gonglu Tian, Matthew Thomas Ondisco, David L. Bergman, Bernfried Messner, Scott J. Smith, Michael M. Azad, Mark Joy
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Publication number: 20150157759Abstract: A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel; (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.Type: ApplicationFiled: February 3, 2015Publication date: June 11, 2015Inventors: Michael M. Azad, Scott J. Smith, Mark Joy, Geoffrey Wyatt Blake, Michael S. Jarman
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Patent number: 8962910Abstract: A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel; (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.Type: GrantFiled: July 6, 2012Date of Patent: February 24, 2015Assignee: Evonik CorporationInventors: Michael M. Azad, Scott J. Smith, Mark Joy, Geoffrey Wyatt Blake, Michael S. Jarman
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Patent number: 8466228Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which has a high gel bed permeability and high centrifuge retention capacity.Type: GrantFiled: August 6, 2010Date of Patent: June 18, 2013Assignee: Evonik CorporationInventors: Scott J. Smith, Mark C. Joy, Whei-Neen Hsu, Markus Frank, Michael M. Azad
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Publication number: 20120271260Abstract: A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel; (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.Type: ApplicationFiled: July 6, 2012Publication date: October 25, 2012Inventors: Michael M. Azad, Scott J. Smith, Mark Joy, Geoffrey Wyatt Blake, Michael S. Jarman
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Patent number: 8222477Abstract: A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel; (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.Type: GrantFiled: October 20, 2008Date of Patent: July 17, 2012Assignee: Evonik Stockhausen, LLCInventors: Michael M. Azad, Scott J. Smith, Mark Joy, Geoffrey Wyatt Blake, Michael S. Jarman
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Publication number: 20100311578Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which has a high gel bed permeability and high centrifuge retention capacity.Type: ApplicationFiled: August 6, 2010Publication date: December 9, 2010Inventors: Scott J. Smith, Mark C. Joy, Whei-Neen Hsu, Markus Frank, Michael M. Azad
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Publication number: 20100303869Abstract: Superabsorbents having a coating of an antimicrobial agent are produced by a process that comprises contacting the superabsorbent with a solution comprising the anti-microbial agent and a polyol concurrently with or immediately after contacting it with the surface-crosslinking agent and prior to the curing step that completes surface crosslinking, and/or contacting the superabsorbent with a solution comprising the anti-microbial agent and polyalkylene glycol of a molecular mass between 200 and 5 000 g/mol after completion of surface crosslinking.Type: ApplicationFiled: September 12, 2008Publication date: December 2, 2010Applicant: BASF SEInventors: Michael M. Azad, James C. Robinson, Michael Young
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Patent number: 7795345Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which has a high gel bed permeability and high centrifuge retention capacity.Type: GrantFiled: November 22, 2006Date of Patent: September 14, 2010Assignee: Evonik Stockhausen, LLCInventors: Scott J. Smith, Mark C. Joy, Whei-Neen Hsu, Markus Frank, Michael M. Azad
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Publication number: 20100100066Abstract: A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel; (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.Type: ApplicationFiled: October 20, 2008Publication date: April 22, 2010Inventors: Michael M. AZAD, Scott J. Smith, Mark Joy, Geoffrey Wyatt Blake, Michael S. Jarman
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Patent number: 7528291Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The color-stable superabsorbent polymer is prepared in the essential absence of a persulfate, and is subjected to a low dose of ultraviolet radiation. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.Type: GrantFiled: March 19, 2004Date of Patent: May 5, 2009Assignee: BASF AktiengesellschaftInventors: Norbert Herfert, Michael M. Azad, Peter W. Carrico
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Patent number: 7504551Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.Type: GrantFiled: March 19, 2004Date of Patent: March 17, 2009Assignee: BASF AktiengesellschaftInventors: Norbert Herfert, Michael M. Azad, Peter W. Carrico, Guy Thomas Woodrum, Michael A. Mitchell, Ma-Ikay Kikama Miatudila
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Patent number: 7396584Abstract: The invention concerns superabsorbent particles with a shell, wherein said shell comprises a cationic polymer crosslinked by the addition of crosslinker and adhered to hydrogel-forming polymer obtainable by applying a coating solution, containing both a cationic polymer and crosslinker, to hydrogel-forming polymer having a residual water content of less than 10 w %, their production and use.Type: GrantFiled: November 15, 2002Date of Patent: July 8, 2008Assignee: BASF AktiengesellschaftInventors: Michael M. Azad, Norbert Herfert, Michael Mitchell, Jim Robinson
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Patent number: 7329701Abstract: Superabsorbent polymer (SAP) particels containing a clay are disclosed. The clay is added to an SAP hydrogel prior to SAP neutralization to provide particles having improved fluid acquisition rates and an improved permeability of a fluid through the swollen SAP-clay particles. Diaper cores and absorbent articles containing the SAP-clay particles also are disclosed.Type: GrantFiled: July 24, 2003Date of Patent: February 12, 2008Assignee: BASF AktiengesellschaftInventors: Norbert Herfert, Michael M. Azad, Michael A. Mitchell, Guy Thomas Woodrum, William G.-J. Chiang, Patricia D. Brown, James C. Robinson
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Patent number: 6569910Abstract: Ion exchange resin granules containing a crosslinked polymerized &agr;,&bgr;-unsaturated acid, like acrylic acid, or a vinyl monomer containing an amino group, like polyvinylamine, and methods of manufacturing the resin, are disclosed.Type: GrantFiled: May 11, 2000Date of Patent: May 27, 2003Assignee: BASF AktiengesellschaftInventors: Ralph Spindler, Thomas W. Beihoffer, Michael M. Azad, Constance M. Noe