Patents Assigned to Evonik Stockhausen, LLC
-
Patent number: 8318306Abstract: The present invention relates to absorbent compositions which exhibit swelling, deswelling, and reswelling behavior. More specifically, absorbent compositions of this invention swell and absorb fluids after exposure to aqueous fluids, deswell and release fluids from the swollen absorbent compositions, and may also reswell and absorb fluids. The swelling-deswelling-reswelling behavior allows enhanced liquid distribution in absorbent composites.Type: GrantFiled: January 30, 2008Date of Patent: November 27, 2012Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, Scott J. Smith, Yaru Shi, Richard N. Dodge, Jian Qin
-
Patent number: 8318895Abstract: A process is described for recycling superabsorbent polymer fines into a process that includes treating the superabsorbent polymer fines with caustic and a polymerization step for making the superabsorbent polymer gel. The process requires treating the superabsorbent polymer fines with a caustic, followed by mixture with polymerizable monomer solution, and polymerizing the mixture of the superabsorbent polymer fines and monomer to form the aqueous fluid absorbent polymer. In the process, the fines are incorporated into the new polymer gel and become indistinguishable there from. The gel may then be comminuted into a particulate dried and then separated into a portion having a desired minimum particle size in a fines portion having less than the desired size. The particulate may then be coated with a surface crosslinking agent and surface additives and heated for surface conversion.Type: GrantFiled: August 2, 2012Date of Patent: November 27, 2012Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, Scott J. Smith, Janet Pate-Linton
-
Patent number: 8309682Abstract: A process is described for recycling superabsorbent polymer fines into a process that includes treating the superabsorbent polymer fines with caustic and a polymerization step for making the superabsorbent polymer gel. The process requires treating the superabsorbent polymer fines with a caustic, followed by mixture with polymerizable monomer solution, and polymerizing the mixture of the superabsorbent polymer fines and monomer to form the aqueous fluid absorbent polymer. In the process, the fines are incorporated into the new polymer gel and become indistinguishable there from. The gel may then be comminuted into a particulate dried and then separated into a portion having a desired minimum particle size in a fines portion having less than the desired size. The particulate may then be coated with a surface crosslinking agent and surface additives and heated for surface conversion.Type: GrantFiled: February 4, 2011Date of Patent: November 13, 2012Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, Scott J. Smith, Janet Pate-Linton
-
Patent number: 8304369Abstract: The present invention relates to a particulate superabsorbent polymer comprising a monomer and an internal crosslinker agent wherein the particulate superabsorbent polymer has a Centrifuge Retention Capacity Increase of 2 g/g or more as set forth herein in the Centrifuge Retention Capacity Increase Test. The present invention further relates to a superabsorbent polymer comprising an internal crosslinker agent comprising a silane compound comprising at least one vinyl group or one allyl group attached to a silicon atom, and at least one Si—O bond. The present invention further relates to an absorbent article that includes such particulate superabsorbent polymers.Type: GrantFiled: May 7, 2010Date of Patent: November 6, 2012Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, David L. Bergman, Jr., Yaru Shi
-
Patent number: 8269060Abstract: An absorbent material formed at least in part of a crosslinked polymer. The absorbent material has a centrifuge retention capacity as determined by a Centrifuge Retention Capacity Test of at least about 20 g/g and a gel bed permeability under load as determined by a Gel Bed Permeability Under Load Test of at least about 300×10?9 cm2 or a free swell gel bed permeability as determined by a Free Swell Gel Bed Permeability Test of at least about 2,500×10?9 cm2. The crosslinked polymer may comprise either at least about 75 weight percent anionic polymer or at least about 75 weight percent cationic polymer. In one embodiment, the cross-linked polymer is surface treated with a water soluble non-cross-linked polymer having a potential for becoming charged opposite that of the cross-linked polymer.Type: GrantFiled: December 11, 2009Date of Patent: September 18, 2012Assignee: Evonik Stockhausen, LLCInventors: Jian Qin, Xiaomin Zhang, Debra Ann Graverson
-
Patent number: 8257451Abstract: A fossil-fuel-fired system, which includes an emissions-control-agent dispenser, a furnace, an emissions monitor and, optionally, a controller, is disclosed. The emissions-control-agent dispenser provides a prescribed amount of organic-emissions-control agent, such as, for example, an opacity-control agent to the fossil-fuel-fired system. The furnace includes an exhaust communicating with the atmosphere. The emissions monitor is capable of measuring at least one property of the flue-gas communicated through the exhaust to the atmosphere. For example, when an organic-emissions-control agent is an opacity-control agent, the emissions monitor has the capability of at least measuring opacity. When included, the controller communicates with at least the emissions-control-agent dispenser and the emissions monitor.Type: GrantFiled: October 12, 2009Date of Patent: September 4, 2012Assignee: Evonik Stockhausen, LLCInventors: Gary W. Allen, John T. Joyce, Jr.
-
Patent number: 8236876Abstract: The invention relates to absorptive, crosslinked polymeric compositions that are based on partly neutralized, monoethylenically unsaturated monomer carrying acid groups wherein the absorptive, crosslinked polymeric composition further includes an antioxidant and is color stable.Type: GrantFiled: November 15, 2011Date of Patent: August 7, 2012Assignee: Evonik Stockhausen, LLCInventors: Iqbal Ahmed, Mirko Walden, Brian King, Scott J. Smith, Harald Schmidt
-
Patent number: 8236884Abstract: The invention relates to absorptive, crosslinked polymeric composition that are based on partly neutralized, monoethylenically unsaturated monomer carrying acid groups wherein the absorptive crosslinked polymer may be coated with a polymeric coating, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which have a high capacity and a high gel bed permeability.Type: GrantFiled: March 23, 2007Date of Patent: August 7, 2012Assignee: Evonik Stockhausen, LLCInventors: Scott J. Smith, Stan McIntosh, David L. Bergman, Jr.
-
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
-
Patent number: 8117975Abstract: A fossil-fuel-fired system, which includes an emissions-control-agent dispenser, a furnace, an emissions monitor and, optionally, a controller, is disclosed. The emissions-control-agent dispenser provides a prescribed amount of organic-emissions-control agent, such as, for example, an opacity-control agent to the fossil-fuel-fired system. The furnace includes an exhaust communicating with the atmosphere. The emissions monitor is capable of measuring at least one property of the flue-gas communicated through the exhaust to the atmosphere. For example, when an organic-emissions-control agent is an opacity-control agent, the emissions monitor has the capability of at least measuring opacity. When included, the controller communicates with at least the emissions-control-agent dispenser and the emissions monitor.Type: GrantFiled: October 12, 2009Date of Patent: February 21, 2012Assignee: Evonik Stockhausen, LLCInventors: Gary W. Allen, John T. Joyce, Jr.
-
Patent number: 8063118Abstract: The invention relates to absorptive, crosslinked polymeric compositions that are based on partly neutralized, monoethylenically unsaturated monomer carrying acid groups wherein the absorptive, crosslinked polymeric composition further includes an antioxidant and is color stable.Type: GrantFiled: September 17, 2010Date of Patent: November 22, 2011Assignee: Evonik Stockhausen, LLCInventors: Iqbal Ahmed, Mirko Walden, Brian King, Scott J. Smith, Harald Schmidt
-
Patent number: 8020731Abstract: A fluid dispenser formed of a bottle for housing the fluid, a discharge mechanism for discharging fluid from the bottle, and a protrusion that is connected to and extends from the bottom of the bottle. The protrusion has a diameter that is smaller than the diameter of the bottom wall of the bottle. The bottle is capable of standing upward on a horizontal surface without the use of a separate base or mount when the protrusion extends into an aperture in the horizontal surface such that the bottom wall of the bottle rests on the horizontal surface.Type: GrantFiled: January 30, 2008Date of Patent: September 20, 2011Assignee: Evonik Stockhausen, LLCInventors: Anthony McCullough, Ron Shuster, Lori Huffman
-
Patent number: 7906585Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomer carrying acid groups wherein the absorptive crosslinked polymer may be coated with a thermoplastic polymer, 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 compatibility to affix to a thermoplastic material.Type: GrantFiled: October 2, 2007Date of Patent: March 15, 2011Assignee: Evonik Stockhausen, LLCInventors: Stan McIntosh, Scott J. Smith, Angela Jones Lang, David L. Bergman, Jr.
-
Patent number: 7816426Abstract: The invention relates to absorptive, crosslinked polymeric compositions that are based on partly neutralized, monoethylenically unsaturated monomer carrying acid groups wherein the absorptive, crosslinked polymeric composition further includes an antioxidant and is color stable.Type: GrantFiled: July 16, 2007Date of Patent: October 19, 2010Assignee: Evonik Stockhausen, LLCInventors: Iqbal Ahmed, Mirko Walden, Brian King, Scott J. Smith, Harald Schmidt
-
Patent number: 7812082Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomer carrying acid groups wherein the absorptive crosslinked polymer may be coated with a thermoplastic polymer, 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 compatibility to affix to a thermoplastic material.Type: GrantFiled: December 12, 2005Date of Patent: October 12, 2010Assignee: Evonik Stockhausen, LLCInventors: Stan McIntosh, Scott J. Smith, Angela Jones Lang, David L. Bergman, Jr.
-
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
-
Patent number: 7777093Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups wherein the absorptive crosslinked polymer may be coated with a thermoplastic polymer, 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: September 1, 2006Date of Patent: August 17, 2010Assignee: Evonik Stockhausen, LLCInventors: Scott J. Smith, Stan McIntosh, Heinz Bremus, Frank Loeker