Patents by Inventor Galen C. Richeson
Galen C. Richeson 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: 11549201Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and an impact copolymer. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the copolymer component comprises less than about 55 wt % ethylene-derived units, based on the weight of the copolymer component.Type: GrantFiled: June 12, 2014Date of Patent: January 10, 2023Assignee: EXXONMOBIL CHEMICALS PATENTS INC.Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
-
Patent number: 11492477Abstract: Described herein are propylene-based polymer compositions that comprise a reactor blend of a first polymer component and a second polymer component. The first polymer component has an ethylene content of from greater than 12 to less than 19 wt % ethylene, and the second polymer component has an ethylene content of from greater than 4 to less than 10 wt % ethylene. Preferably, the ethylene content of the first and second polymer components satisfy the formula: ?1.7143R1+29.771?R2??1.9167R1+37.25. The propylene-based polymer compositions are particularly useful for forming meltspun nonwoven compositions that exhibit a desirable balance of retractive force and permanent set.Type: GrantFiled: May 1, 2014Date of Patent: November 8, 2022Assignee: EXXONMOBIL CHEMICALS PATENT INC.Inventors: Cynthia A. Mitchell, Galen C. Richeson, Narayanaswami Dharmarajan
-
Patent number: 11214036Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and a broad molecular weight polypropylene or a broad molecular weight impact copolymer. The broad molecular weight polypropylene has a molecular weight distribution (MWD) of greater than 4.5. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the propylene homopolymer component has a molecular weight distribution (MWD) of greater than 4.5.Type: GrantFiled: June 12, 2014Date of Patent: January 4, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
-
Publication number: 20190291400Abstract: Provided are multi-beam meltblowing apparatuses having a ridged collecting surface, methods for making multilayer meltblown composites using such apparatuses, and multilayer meltblown composites made therefrom. Also provided are a multilayer composite comprising an elastic layer and at least one ridged layer and a method for making the multilayer composite.Type: ApplicationFiled: April 3, 2019Publication date: September 26, 2019Inventors: Alistair D. Westwood, Galen C. Richeson
-
Patent number: 10196506Abstract: The invention relates to an heat-activated fabric comprising a polymer blend of 70 to 100 wt % of a polymer blend component and 0 to 30 wt % of a propylene polymer, wherein the polymer blend component comprises a first propylene-based polymer, wherein the first propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin and a second propylene-based polymer, wherein the second propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin, wherein the second propylene-based polymer is different than the first propylene-based polymer and wherein the polymer blend component has a MFR of greater than or equal to 20 g/10 min to less than 10,000 g/10 min; and wherein the propylene polymer has a MFR of greater than or equal to 20 g/10 min to less than 5,000 g/10 min.Type: GrantFiled: July 20, 2015Date of Patent: February 5, 2019Assignee: ExxonMobil Chemical Patents Inc.Inventors: James N. Coffey, Galen C. Richeson, Jennifer J. Austin, Jurgen J. M. Schroeyers
-
Patent number: 10077516Abstract: The invention relates to a fiber comprising a blend of 10-50 wt % of a polymer blend modifier and 50-90 wt % of a propylene-based elastomer; 5-50 wt % of a propylene-modifier and 50-95 wt % of a propylene-based elastomer; and 5-35 wt % of a polymer blend modifier and 65-95 wt % of a propylene-modifier. The polymer blend modifier has a first propylene-based polymer and a different second propylene-based polymer that is a propylene homopolymer or a copolymer of propylene and ethylene and a C4 to C10 alpha-olefin. The propylene-modifier is a propylene homopolymer or a copolymer of propylene with 0.5-4 wt % ethylene or C4 to C10 alpha-olefins. The propylene-based elastomer is propylene and 5-25 wt % of one or more C2 to C4-C12 alpha-olefins and has a triad tacticity greater than 90% and a heat of fusion less than 75 J/g.Type: GrantFiled: August 5, 2015Date of Patent: September 18, 2018Assignee: ExxonMobil Chemical Patents Inc.Inventors: Galen C. Richeson, Jennifer J. Austin, James N. Coffey
-
Publication number: 20180230629Abstract: The invention relates to a fiber comprising a blend of 10-50 wt % of a polymer blend modifier and 50-90 wt % of a propylene-based elastomer; 5-50 wt % of a propylene-modifier and 50-95 wt % of a propylene-based elastomer; and 5-35 wt % of a polymer blend modifier and 65-95 wt % of a propylene-modifier. The polymer blend modifier has a first propylene-based polymer and a different second propylene-based polymer that is a propylene homopolymer or a copolymer of propylene and ethylene and a C4 to C10 alpha-olefin. The propylene-modifier is a propylene homopolymer or a copolymer of propylene with 0.5-4 wt % ethylene or C4 to C10 alpha-olefins. The propylene-based elastomer is propylene and 5-25 wt % of one or more C2 to C4-C12 alpha-olefins and has a triad tacticity greater than 90% and a heat of fusion less than 75 J/g.Type: ApplicationFiled: August 5, 2015Publication date: August 16, 2018Inventors: Galen C. Richeson, Jennifer J. Austin, James N. Coffey
-
Publication number: 20170362420Abstract: The invention relates to an heat-activated fabric comprising a polymer blend of 70 to 100 wt % of a polymer blend component and 0 to 30 wt % of a propylene polymer, wherein the polymer blend component comprises a first propylene-based polymer, wherein the first propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin and a second propylene-based polymer, wherein the second propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin, wherein the second propylene-based polymer is different than the first propylene-based polymer and wherein the polymer blend component has a MFR of greater than or equal to 20 g/10 min to less than 10,000 g/10 min; and wherein the propylene polymer has a MFR of greater than or equal to 20 g/10 min to less than 5,000 g/10 min.Type: ApplicationFiled: July 20, 2015Publication date: December 21, 2017Inventors: James N. Coffey, Galen C. Richeson, Jennifer J. Austin, Jurgen J.M. Schroeyers
-
Patent number: 9702060Abstract: Disclosed is a process for producing spunbond fibers comprising melt blending a polypropylene having a melt flow rate (230/2.16) of from 10 to 30 dg/min with a peroxide visbreaker such that the resulting melt flow rate of the visbroken polypropylene is from 50 to 100 dg/min; melt extruding the visbroken polypropylene through a die block such that filaments of the visbroken polypropylene being produced are exposed to a cabin pressure of from 4500 to 7000 Pa; and forming fibers of from less than 6.0 denier. Nonwoven fabrics and multiple-layer structures can be made from the fibers described herein that are useful for filtering and absorption related articles.Type: GrantFiled: July 16, 2014Date of Patent: July 11, 2017Assignee: ExxonMobil Chemical Patents Inc.Inventors: William M. Ferry, Galen C. Richeson
-
Patent number: 9498932Abstract: Multilayer meltblown composites, articles made therefrom, and methods for making same. One method can include meltblowing a first material to form a first meltblown layer; meltblowing a second material to form a second meltblown layer; and meltblowing a third material to form a third meltblown layer, wherein each material is the same or different, each material includes at least one resin having a MFR of about 2,000 dg/min or less, as measured by ASTM D1238, 2.16 kg, 230° C., and at least one of the first, second, and third materials comprises an elastomer having a recovery of at least 70% after 100% deformation, as determined by ASTM D412.Type: GrantFiled: September 30, 2010Date of Patent: November 22, 2016Assignee: ExxonMobil Chemical Patents Inc.Inventors: Galen C. Richeson, Alistair D. Westwood, William Michael Ferry
-
Publication number: 20160082690Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and a broad molecular weight polypropylene or a broad molecular weight impact copolymer. The broad molecular weight polypropylene has a molecular weight distribution (MWD) of greater than 4.5. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the propylene homopolymer component has a molecular weight distribution (MWD) of greater than 4.5.Type: ApplicationFiled: June 12, 2014Publication date: March 24, 2016Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
-
Publication number: 20160076171Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and an impact copolymer. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the copolymer component comprises less than about 55 wt % ethylene-derived units, based on the weight of the copolymer component.Type: ApplicationFiled: June 12, 2014Publication date: March 17, 2016Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
-
Patent number: 9279047Abstract: Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C2 and/or C4-C12 ?-olefins. The polymer compositions have a triad tacticity greater than about 90%, a heat of fusion less than about 75 J/g, and a melt flow rate (MFR) greater than or equal to about 25 g/10 min (230° C., 2.16 kg). Further, the polymer compositions are reactor grade compositions comprising a reactor blend of a first polymer and a second polymer, preferably where both of the first and second polymers are prepared using the same catalyst system. Meltspun nonwoven fabrics, such as meltblown or spunbond fabrics, comprising such polymer compositions are also provided, as well as processes for forming the nonwoven fabrics.Type: GrantFiled: March 10, 2014Date of Patent: March 8, 2016Assignee: ExxonMobil Chemical Patents Inc.Inventors: Galen C. Richeson, Rainer Kolb, Jean-Roch H. Schauder, Thomas T. Sun
-
Publication number: 20160032090Abstract: Described herein are propylene-based polymer compositions that comprise a reactor blend of a first polymer component and a second polymer component. The first polymer component has an ethylene content of from greater than 12 to less than 19 wt % ethylene, and the second polymer component has an ethylene content of from greater than 4 to less than 10 wt % ethylene. Preferably, the ethylene content of the first and second polymer components satisfy the formula: ?1.7143R1+29.771?R2??1.9167R1+37.25. The propylene-based polymer compositions are particularly useful for forming meltspun nonwoven compositions that exhibit a desirable balance of retractive force and permanent set.Type: ApplicationFiled: May 1, 2014Publication date: February 4, 2016Inventors: Cynthia A. Mitchell, Galen C. Richeson, Narayanaswami Dharmarajan
-
Patent number: 9212432Abstract: Disclosed herein is a spunbond fiber of visbroken polypropylene having an Mw/Mn of from 3.5 to 7.0, an Mz/Mw of from greater than 2.0 and a melt flow rate (230/2.16) of from 50 to 100 dg/min. Also disclosed is a process for producing spunbond fibers comprising melt blending a polypropylene having a melt flow rate (230/2.16) of from 10 to 30 dg/min with a peroxide visbreaker such that the resulting melt flow rate of the visbroken polypropylene is from 50 to 100 dg/min; melt extruding the visbroken polypropylene through a die block such that filaments of the visbroken polypropylene being produced are exposed to a cabin pressure of from 4500 to 7000 Pa; and forming fibers of from less than 6.0 denier. Nonwoven fabrics and multiple-layer structures can be made from the fibers described herein that are useful for filtering and absorption related articles.Type: GrantFiled: September 5, 2008Date of Patent: December 15, 2015Assignee: ExxonMobil Chemical Patents Inc.Inventors: William M. Ferry, Galen C. Richeson
-
Publication number: 20140327164Abstract: Disclosed is a process for producing spunbond fibers comprising melt blending a polypropylene having a melt flow rate (230/2.16) of from 10 to 30 dg/min with a peroxide visbreaker such that the resulting melt flow rate of the visbroken polypropylene is from 50 to 100 dg/min; melt extruding the visbroken polypropylene through a die block such that filaments of the visbroken polypropylene being produced are exposed to a cabin pressure of from 4500 to 7000 Pa; and forming fibers of from less than 6.0 denier. Nonwoven fabrics and multiple-layer structures can be made from the fibers described herein that are useful for filtering and absorption related articles.Type: ApplicationFiled: July 16, 2014Publication date: November 6, 2014Inventors: William M. Ferry, Galen C. Richeson
-
Publication number: 20140323003Abstract: The present invention relates to bicomponent polymer fibers, and to processes for forming those fibers. Bicomponent polymer fibers are described, having a core comprising a core polymer and a sheath comprising a sheath polymer, wherein the sheath polymer is a polyolefin having an Mw less than about 65,000 g/mol. The core polymer has an Mw at least about 20,000 g/mol greater than the Mw of the sheath polymer. Processes for forming bicomponent fibers are also described, comprising (i) forming a molten blend of a core polymer and a sheath polymer; (ii) extruding the molten polymer blend using an extrusion die having a length to diameter ratio greater than or equal to about 10 and under shear conditions sufficient to drive the sheath polymer to the die wall; and (iii) forming meltblown fibers having a core comprising the core polymer and a sheath comprising the sheath polymer.Type: ApplicationFiled: October 18, 2011Publication date: October 30, 2014Inventors: Galen C. Richeson, Alistair D. Westwood, Aspy K. Mehta
-
Publication number: 20140194845Abstract: Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C2 and/or C4-C12 ?-olefins. The polymer compositions have a triad tacticity greater than about 90%, a heat of fusion less than about 75 J/g, and a melt flow rate (MFR) greater than or equal to about 25 g/10 min (230° C., 2.16 kg). Further, the polymer compositions are reactor grade compositions comprising a reactor blend of a first polymer and a second polymer, preferably where both of the first and second polymers are prepared using the same catalyst system. Meltspun nonwoven fabrics, such as meltblown or spunbond fabrics, comprising such polymer compositions are also provided, as well as processes for forming the nonwoven fabrics.Type: ApplicationFiled: March 10, 2014Publication date: July 10, 2014Inventors: Galen C. Richeson, Rainer Kolb, Jean-Roch H. Schauder, Thomas T. Sun
-
Patent number: 8710148Abstract: Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C2 and/or C4-C12 ?-olefins. The polymer compositions have a triad tacticity greater than about 90%, a heat of fusion less than about 75 J/g, and a melt flow rate (MFR) greater than or equal to about 25 g/10 min (230° C., 2.16 kg). Further, the polymer compositions are reactor grade compositions comprising a reactor blend of a first polymer and a second polymer, preferably where both of the first and second polymers are prepared using the same catalyst system. Meltspun nonwoven fabrics, such as meltblown or spunbond fabrics, comprising such polymer compositions are also provided, as well as processes for forming the nonwoven fabrics.Type: GrantFiled: December 2, 2011Date of Patent: April 29, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Galen C. Richeson, Rainer Kolb, Jean-Roch Schauder, Thomas T. Sun
-
Publication number: 20130143461Abstract: Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C2 and/or C4-C12 ?-olefins. The polymer compositions have a triad tacticity greater than about 90%, a heat of fusion less than about 75 J/g, and a melt flow rate (MFR) greater than or equal to about 25 g/10 min (230° C., 2.16 kg). Further, the polymer compositions are reactor grade compositions comprising a reactor blend of a first polymer and a second polymer, preferably where both of the first and second polymers are prepared using the same catalyst system. Meltspun nonwoven fabrics, such as meltblown or spunbond fabrics, comprising such polymer compositions are also provided, as well as processes for forming the nonwoven fabrics.Type: ApplicationFiled: December 2, 2011Publication date: June 6, 2013Inventors: Galen C. Richeson, Rainer Kolb, Jean-Roch Schauder, Thomas T. Sun