Patents by Inventor Gonglu Tian
Gonglu Tian 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).
-
Patent number: 8647317Abstract: 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: February 18, 2013Date of Patent: February 11, 2014Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, David L. Bergman, Jr., Yaru Shi
-
Publication number: 20130277608Abstract: A process for producing a polysaccharide superabsorbent particulate including the process steps of bringing into contact a polysaccharide with a polyphosphate or a polyphosphoric acid as crosslinking agent in the presence of water to form a polysaccharide gel drying the polysaccharide gel, comminuting the dried polysaccharide gel to form polysaccharide superabsorbent polymer particles, coating the particles with a polyphosphate or polyphosphoric acid, crosslinking the coated particles, and surface treating the particulate with a metal multivalent salt or an acid. The invention further relates to a polysaccharide superabsorbent polymer particulate obtainable by this process, a water-absorbent polysaccharide, a composite, a process for producing a composite, a composite produced by this process, the use of the polysaccharide superabsorbent particulates or of the composites as well as the use of polyphosphates.Type: ApplicationFiled: June 7, 2013Publication date: October 24, 2013Inventors: Gonglu Tian, Xinyuan Yang, Scott J. Smith
-
Patent number: 8486855Abstract: A process for producing a polysaccharide superabsorbent particulate including the process steps of bringing into contact a polysaccharide with a polyphosphate or a polyphosphoric acid as crosslinking agent in the presence of water to form a polysaccharide gel drying the polysaccharide gel, comminuting the dried polysaccharide gel to form polysaccharide superabsorbent polymer particles, coating the particles with a polyphosphate or polyphosphoric acid, crosslinking the coated particles, and surface treating the particulate with a metal multivalent salt or an acid. The invention further relates to a polysaccharide superabsorbent polymer particulate obtainable by this process, a water-absorbent polysaccharide, a composite, a process for producing a composite, a composite produced by this process, the use of the polysaccharide superabsorbent particulates or of the composites as well as the use of polyphosphates.Type: GrantFiled: October 18, 2012Date of Patent: July 16, 2013Assignee: Evonik Stockhausen LLCInventors: Gonglu Tian, Xinyuan Yang, Scott J. Smith
-
Patent number: 8487049Abstract: 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: November 9, 2012Date of Patent: July 16, 2013Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, Scott J. Smith, Janet Pate-Linton
-
Patent number: 8403904Abstract: 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: October 4, 2012Date of Patent: March 26, 2013Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, David L. Bergman, Jr., Yaru Shi
-
Patent number: 8361926Abstract: A process for producing a polysaccharide superabsorbent particulate including the process steps of bringing into contact a polysaccharide with a polyphosphate or a polyphosphoric acid as crosslinking agent in the presence of water to form a polysaccharide gel drying the polysaccharide gel, comminuting the dried polysaccharide gel to form polysaccharide superabsorbent polymer particles, coating the particles with a polyphosphate or polyphosphoric acid, crosslinking the coated particles, and surface treating the particulate with a metal multivalent salt or an acid. The invention further relates to a polysaccharide superabsorbent polymer particulate obtainable by this process, a water-absorbent polysaccharide, a composite, a process for producing a composite, a composite produced by this process, the use of the polysaccharide superabsorbent particulates or of the composites as well as the use of polyphosphates.Type: GrantFiled: November 25, 2008Date of Patent: January 29, 2013Assignee: Evonik Stockhausen, LLCInventors: Gonglu Tian, Xinyuan Yang, Scott J. Smith
-
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
-
Publication number: 20120292566Abstract: 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: ApplicationFiled: August 2, 2012Publication date: November 22, 2012Inventors: 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
-
Publication number: 20120267570Abstract: The present invention relates to a particulate superabsorbent polymer composition which absorbs water, aqueous liquids, and blood, and a process to make the superabsorbent polymers, wherein a superabsorbent polymer is surface treated with a neutralized multivalent metal salt solution having a pH value similar as that of human skin. The present invention also relates to particulate superabsorbent polymer composition having high Gel Bed Permeability and high Absorbency Under Load.Type: ApplicationFiled: April 21, 2011Publication date: October 25, 2012Inventors: Yaru Shi, Gonglu Tian, Mark Joy, Geoff Blake, Scott Smith, Bernfried Messner
-
Publication number: 20110275513Abstract: 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: ApplicationFiled: May 7, 2010Publication date: November 10, 2011Inventors: Gonglu Tian, David L. Bergman, JR., Yaru Shi
-
Patent number: 7977531Abstract: The present invention relates to absorbent articles that include 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 can also reswell and absorb fluids. The swelling-deswelling-reswelling behavior allows enhanced liquid distribution in absorbent composites and absorbent articles.Type: GrantFiled: June 30, 2008Date of Patent: July 12, 2011Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Richard N. Dodge, II, Jian Qin, Scott J. Smith, Gonglu Tian, Yaru Shi
-
Patent number: 7977530Abstract: The present invention relates to absorbent articles that include 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 can also reswell and absorb fluids. The swelling-deswelling-reswelling behavior allows enhanced liquid distribution in absorbent composites and absorbent articles.Type: GrantFiled: June 30, 2008Date of Patent: July 12, 2011Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Richard N. Dodge, II, Jian Qin, Scott J. Smith, Gonglu Tian, Yaru Shi
-
Publication number: 20110121231Abstract: 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: ApplicationFiled: February 4, 2011Publication date: May 26, 2011Inventors: Gonglu Tian, Scott J. Smith, Janet Pate-Linton
-
Patent number: 7910688Abstract: 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: October 22, 2008Date of Patent: March 22, 2011Assignee: Evonik Stockhausen Inc.Inventors: Gonglu Tian, Scott J. Smith, Janet Pate-Linton
-
Publication number: 20100130355Abstract: A process for producing a polysaccharide superabsorbent particulate including the process steps of bringing into contact a polysaccharide with a polyphosphate or a polyphosphoric acid as crosslinking agent in the presence of water to form a polysaccharide gel drying the polysaccharide gel, comminuting the dried polysaccharide gel to form polysaccharide superabsorbent polymer particles, coating the particles with a polyphosphate or polyphosphoric acid, crosslinking the coated particles, and surface treating the particulate with a metal multivalent salt or an acid. The invention further relates to a polysaccharide superabsorbent polymer particulate obtainable by this process, a water-absorbent polysaccharide, a composite, a process for producing a composite, a composite produced by this process, the use of the polysaccharide superabsorbent particulates or of the composites as well as the use of polyphosphates.Type: ApplicationFiled: November 25, 2008Publication date: May 27, 2010Inventors: Gonglu TIAN, Xinyuan Yang, Scott J. Smith
-
Publication number: 20100099781Abstract: 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: ApplicationFiled: October 22, 2008Publication date: April 22, 2010Inventors: Gonglu TIAN, Scott J. Smith, Janet Pate-Linton
-
Publication number: 20090192482Abstract: The present invention relates to absorbent articles that include 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 can also reswell and absorb fluids. The swelling-deswelling-reswelling behavior allows enhanced liquid distribution in absorbent composites and absorbent articles.Type: ApplicationFiled: June 30, 2008Publication date: July 30, 2009Inventors: Richard N. Dodge, II, Jian Qin, Scott J. Smith, Gonglu Tian, Yaru Shi