Patents by Inventor Frederick Leslie Colhoun
Frederick Leslie Colhoun 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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Publication number: 20220289868Abstract: A process for preparing a recycle cellulose ester and a recycle cellulose ester composition and articles made with such recycle cellulose esters comprising at least one cellulose ester having at least one substituent on an anhydroglucose unit (AU) derived from recycled cellulose ester content syngas are provided. The recycled cellulose ester content syngas can be obtained by gasifying feedstocks containing a solid fossil fuel such as coal, a cellulose ester, and water. The cellulose ester can be post-consumer or post-industrial cellulose ester.Type: ApplicationFiled: September 24, 2020Publication date: September 15, 2022Applicant: Eastman Chemical CompanyInventors: Frederick Leslie Colhoun, Ronald Buford Sheppard, William Lewis Trapp
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Patent number: 10370486Abstract: Polyester polymer particle spheroids comprising a polyester polymer including: a carboxylic acid component containing at least 90 mole % of the residues of terephthalic acid, derivates of terephthalic acid, naphthalene-2,6-dicarboxylic acid, and/or derivatives of naphthalene-2,6-dicarboxylic acid, and a hydroxyl component containing from 90 to 96 mole % of the residues of ethylene glycol, based on 100 mole percent of the carboxylic acid component residues and 100 mole percent hydroxyl component residues in the polyester polymer, wherein said particle has an It.V. of at least 0.72 dL/g, and the It.V. at the surface of the particle is from 0.02 dL/g to less than 0.25 dL/g higher than the It.V. at the center of the particle, and wherein the polyester polymer spheroids are not solid state polymerized.Type: GrantFiled: September 23, 2016Date of Patent: August 6, 2019Assignee: GRUPO PETROTEMEX S.A. DE C.V.Inventors: Frederick Leslie Colhoun, Michael Paul Ekart, Mary Therese Jernigan, Stephen Weinhold
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Patent number: 9777111Abstract: Polyester compositions having desirable injection molding properties and that retain good crystallization rates and natural stretch ratio characteristics are described. These polyesters are suitable for the manufacture of beverage containers, bulk continuous filaments, and other articles that can benefit from such improved properties.Type: GrantFiled: October 20, 2005Date of Patent: October 3, 2017Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Frederick Leslie Colhoun, Perry Michael Murdaugh, Sr.
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Publication number: 20170009009Abstract: Polyester polymer particle spheroids comprising a polyester polymer including: a carboxylic acid component containing at least 90 mole % of the residues of terephthalic acid, derivates of terephthalic acid, naphthalene-2,6-dicarboxylic acid, and/or derivatives of naphthalene-2,6-dicarboxylic acid,; and a hydroxyl component containing from 90 to 96 mole % of the residues of ethylene glycol, based on 100 mole percent of the carboxylic acid component residues and 100 mole percent hydroxyl component residues in the polyester polymer, wherein said particle has an kV. of at least 0.72 dL/g, and the It.V. at the surface of the particle is from 0.02 dL/g to less than 0.25 dL/g higher than the It.V. at the center of the particle, and wherein the polyester polymer spheroids are not solid state polymerized.Type: ApplicationFiled: September 23, 2016Publication date: January 12, 2017Applicant: GRUPO PETROTEMEX, S.A. DE C.V.Inventors: Frederick Leslie COLHOUN, Michael Paul EKART, Mary Therese JERNIGAN, Stephen WEINHOLD
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Patent number: 9062200Abstract: Polymer blends suitable for packaging are disclosed that include one or more impact modifiers; and one or more polyethylene terephthalate homopolymers or copolymers obtained by a melt phase polymerization using a catalyst system comprising aluminum atoms in an amount, for example, from about 3 ppm to about 60 ppm and one or more alkaline earth metal atoms, alkali metal atoms, or alkali compound residues in an amount, for example, from about 1 ppm to about 25 ppm, in each case based on the weight of the one or more polyethylene terephthalate homopolymers or copolymers The polymer blends disclosed exhibit improved low temperature toughness compared with blends made using polymers prepared with conventional catalyst systems.Type: GrantFiled: August 14, 2014Date of Patent: June 23, 2015Assignee: GRUPO PETROTEMEX, S.A. DE C.V.Inventors: Frederick Leslie Colhoun, Mark Edward Stewart, Stephen Weinhold, Richard Dalton Peters, Roger Lee Martin
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Patent number: 8968615Abstract: A bulk of polyester polymer particles comprising polyester polymer comprising greater than 75% virgin polyester polymer, the particles having: A) an It.V. of at least 0.72 dl/g, and B) 10 ppm or less of residual acetaldehyde; and C) at least two melting peaks, wherein one of said at least two melting peaks is a low peak melting point within a range of 140° C. to 220° C. and having a melting endotherm area of at least the absolute value of 1 J/g. The particles may also have a degree of crystallinity within a range of 20% and a maximum degree of crystallinity Tcmax defined by the equation: Tcmax=50%?CA?OH where CA is the total mole % of all carboxylic acid residues other than terephthalic acid residues, based on 100 mole % of carboxylic acid residues, and OH is the total mole % of all hydroxyl functional compound residues other than ethylene glycol residues, based on 100 mole % of hydroxyl functional compounds residues.Type: GrantFiled: October 21, 2010Date of Patent: March 3, 2015Assignee: Eastman Chemical CompanyInventors: Michael Paul Ekart, Frederick Leslie Colhoun, Mary Therese Jernigan, Stephen Weinhold, Rodney Scott Armentrout
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Patent number: 8859681Abstract: Polymer blends suitable for packaging are disclosed that include one or more impact modifiers; and one or more polyethylene terephthalate homopolymers or copolymers obtained by a melt phase polymerization using a catalyst system comprising aluminum atoms in an amount, for example, from about 3 ppm to about 60 ppm and one or more alkaline earth metal atoms, alkali metal atoms, or alkali compound residues in an amount, for example, from about 1 ppm to about 25 ppm, in each case based on the weight of the one or more polyethylene terephthalate homopolymers or copolymers The polymer blends disclosed exhibit improved low temperature toughness compared with blends made using polymers prepared with conventional catalyst systems.Type: GrantFiled: August 31, 2011Date of Patent: October 14, 2014Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Frederick Leslie Colhoun, Mark Edward Stewart, Stephen Weinhold, Richard Dalton Peters, Roger Lee Martin
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Publication number: 20110318519Abstract: Polymer blends suitable for packaging are disclosed that include one or more impact modifiers; and one or more polyethylene terephthalate homopolymers or copolymers obtained by a melt phase polymerization using a catalyst system comprising aluminum atoms in an amount, for example, from about 3 ppm to about 60 ppm and one or more alkaline earth metal atoms, alkali metal atoms, or alkali compound residues in an amount, for example, from about 1 ppm to about 25 ppm, in each case based on the weight of the one or more polyethylene terephthalate homopolymers or copolymers The polymer blends disclosed exhibit improved low temperature toughness compared with blends made using polymers prepared with conventional catalyst systems.Type: ApplicationFiled: August 31, 2011Publication date: December 29, 2011Applicant: GRUPO PETROTEMEX, S.A. DE C.V.Inventors: Frederick Leslie COLHOUN, Mark Edward Stewart, Stephen Weinhold, Richard Dalton Peters, Roger Lee Martin
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Patent number: 8057726Abstract: Disclosed is a process for a melt processing a polyethylene terephthalate resin characterized by one or more of the following. The polyester particles may have at least two melting peaks wherein one of the at least two melting peaks is a low peak melting point with a range from 140° C. to 220° C., or from 140° C. to 230° C., and having a melting endothermic area of at least the absolute value of 1 J/g. The polyester particles may have one or more melting peaks at least one of which when measured on a DSC first heating scan has a heating curve departing from a baseline in the endothermic direction at a temperature of less than or equal to 200° C. The polyester particles may have an It.V. at their surface which is less than 0.25 dL/g higher than the It.V. at their center. The polyester particles may have not been solid stated. The melt processing device comprises a screw with a total length, L, a feed zone length in the range from 0.16L and 0.45L, a taper angle, ?, in the range from 0.5 degrees and 5.Type: GrantFiled: May 26, 2009Date of Patent: November 15, 2011Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Marcus David Shelby, Michael Eugene Donelson, Frederick Leslie Colhoun, Steven Lee Stafford, Mark Edward Stewart, Stephen Weinhold, Edward Lewis Boochard, Robert Noah Estep
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Patent number: 8058360Abstract: Polymer blends suitable for packaging are disclosed that include one or more impact modifiers; and one or more polyethylene terephthalate homopolymers or copolymers obtained by a melt phase polymerization using a catalyst system comprising aluminum atoms in an amount, for example, from about 3 ppm to about 60 ppm and one or more alkaline earth metal atoms, alkali metal atoms, or alkali compound residues in an amount, for example, from about 1 ppm to about 25 ppm, in each case based on the weight of the one or more polyethylene terephthalate homopolymers or copolymers The polymer blends disclosed exhibit improved low temperature toughness compared with blends made using polymers prepared with conventional catalyst systems.Type: GrantFiled: June 1, 2007Date of Patent: November 15, 2011Assignee: Grupo Petrotemex, S.A. De C.V.Inventors: Frederick Leslie Colhoun, Mark Edward Stewart, Stephen Weinhold, Richard Dalton Peters, Roger Lee Martin
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Patent number: 8039577Abstract: Polyester compositions are disclosed that include polyester polymers or copolymers having incorporated therein titanium nitride particles that provide one or more of the following advantages: improving the reheat properties of the compositions, improving the color of the compositions through reduced yellowness, and improving the UV-blocking properties of the compositions. Processes for making such compositions are also disclosed. The titanium nitride particles may be incorporated in the polyester by melt compounding, or may be added at any stage of the polymerization, such as during the melt-phase of the polymerization. A range of particle sizes may be used, as well as a range of particle size distributions. The polyester compositions are suitable for use in packaging made from processes in which a reheat step is desirable, or decreased yellowness is desired, or increased resistance to the effects of ultraviolet light is desired, or any combination of the foregoing.Type: GrantFiled: March 3, 2008Date of Patent: October 18, 2011Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Zhiyong Xia, Steven Lee Stafford, Susan Sims, Frederick Leslie Colhoun
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Patent number: 8022168Abstract: Spheroidal polyester polymer particles, as well as preforms and stretch blow molded bottles made from the spheroidal particles, are provided which have: A) an It.V. of at least 0.72 dL/g, and either B) at least two melting peaks (on a DSC first heating scan), wherein one of said at least two melting peaks is a low peak melting point having a peak temperature within a range of 140° C. to 220° C.Type: GrantFiled: June 16, 2006Date of Patent: September 20, 2011Assignee: Grupo Petrotexmex, S.A. de C.V.Inventors: Stephen Weinhold, Frederick Leslie Colhoun, Michael Paul Ekart, Benjamin Bradford Gamble
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Patent number: 7960472Abstract: A process for preparing modified polymer by withdrawing a slip stream of polymer melt from the discharge line of a continuous polymerization reactor, admixing in a highly modified polymeric additive into the polymer melt within the slip stream, then introducing the modifier containing slip stream late in the manufacturing process prior to the slip stream withdrawal point. The improved processes of the invention have particular utility for large-scale, continuous reactor where transitions and short production runs are economically prohibitive thereby limiting the product breath. The process is particularly suited for producing a family of copolyesters using a continuous melt phase production process.Type: GrantFiled: October 21, 2010Date of Patent: June 14, 2011Assignee: Eastman Chemical CompanyInventors: Frederick Leslie Colhoun, Kenrick Lyle Venett, Bruce Roger DeBruin
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Patent number: 7935399Abstract: A bulk of polyester polymer particles comprising polyester polymer comprising greater than 75% virgin polyester polymer, the particles having: A) an It.V. of at least 0.72 dl/g, and B) 10 ppm or less of residual acetaldehyde; and C) at least two melting peaks, wherein one of said at least two melting peaks is a low peak melting point within a range of 140° C. to 220° C. and having a melting endotherm area of at least the absolute value of 1 J/g. The particles may also have a degree of crystallinity within a range of 20% and a maximum degree of crystallinity Tcmax defined by the equation: Tcmax=50%?CA?OH where CA is the total mole % of all carboxylic acid residues other than terephthalic acid residues, based on 100 mole % of carboxylic acid residues, and OH is the total mole % of all hydroxyl functional compound residues other than ethylene glycol residues, based on 100 mole % of hydroxyl functional compounds residues.Type: GrantFiled: December 21, 2004Date of Patent: May 3, 2011Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Michael Paul Ekart, Frederick Leslie Colhoun, Mary Therese Jernigan, Stephen Weinhold, Rodney Scott Armentrout
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Publication number: 20110092663Abstract: In one embodiment of the present invention, spheroidal polyester polymer particles, as well as articles such as films, sheets, tubes, and the like made from the spheroidal particles, are provided. According to various embodiments of the invention, the particles may have an intrinsic viscosity (It.V.) of at least 0.65 dL/g and a degree of crystallinity less than about 45 percent. In another embodiment, the polyester polymer can comprise at least 4 mole percent and no more than 20 mole percent of residues other than ethylene glycol residues.Type: ApplicationFiled: October 21, 2010Publication date: April 21, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Stephen Weinhold, Frederick Leslie Colhoun, Michael Paul Ekart, Benjamin Bradford Gamble
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Publication number: 20110040067Abstract: A bulk of polyester polymer particles comprising polyester polymer comprising greater than 75% virgin polyester polymer, the particles having: A) an It.V. of at least 0.72 dl/g, and B) 10 ppm or less of residual acetaldehyde; and C) at least two melting peaks, wherein one of said at least two melting peaks is a low peak melting point within a range of 140° C. to 220° C. and having a melting endotherm area of at least the absolute value of 1 J/g. The particles may also have a degree of crystallinity within a range of 20% and a maximum degree of crystallinity Tcmax defined by the equation: Tcmax=50%?CA?OH where CA is the total mole % of all carboxylic acid residues other than terephthalic acid residues, based on 100 mole % of carboxylic acid residues, and OH is the total mole % of all hydroxyl functional compound residues other than ethylene glycol residues, based on 100 mole % of hydroxyl functional compounds residues.Type: ApplicationFiled: October 21, 2010Publication date: February 17, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Michael Paul Ekart, Frederick Leslie Colhoun, Mary Therese Jernigan, Stephen Weinhold, Rodney Scott Armentrout
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Publication number: 20110031210Abstract: Polyester compositions having desirable injection molding properties and that retain good crystallization rates and natural stretch ratio characteristics are described. These polyesters are suitable for the manufacture of beverage containers, bulk continuous filaments, and other articles that can benefit from such improved properties.Type: ApplicationFiled: October 21, 2010Publication date: February 10, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Frederick Leslie Colhoun, Perry Michael Murdaugh, SR.
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Publication number: 20110034630Abstract: A process for preparing modified polymer by withdrawing a slip stream of polymer melt from the discharge line of a continuous polymerization reactor, admixing in a highly modified polymeric additive into the polymer melt within the slip stream, then introducing the modifier containing slip stream late in the manufacturing process prior to the slip stream withdrawal point. The improved processes of the invention have particular utility for large-scale, continuous reactor where transitions and short production runs are economically prohibitive thereby limiting the product breath. The process is particularly suited for producing a family of copolyesters using a continuous melt phase production process.Type: ApplicationFiled: October 21, 2010Publication date: February 10, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Frederick Leslie Colhoun, Kenrick Lyle Venett, Bruce Roger DeBruin
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Publication number: 20110034665Abstract: There is now provided a polyester polymer particle having an It.V., a surface, and a center, wherein the It.V. at the surface of the particle is less than 0.25 dL/g higher than the It.V. at the center of the particle. The polyester polymer particle is desirably crystalline to prevent the particles from sticking to each other while drying, and desirably contains less than 10 ppm acetaldehyde. A polyester container, preferably a preform or beverage bottle, is made by feeding crystallized polyester particles having an It.V. of at least 0.70 dL/g to an extrusion zone, melting the particles in the extrusion zone to form a molten polyester polymer composition, and forming a sheet or a molded part from extruded molten polyester polymer, wherein at least a portion of the polyester particles have an It.V. at their surface which does not vary from their It.V. at their center by more than 0.25 dL/g, and the particles have not been solid state polymerized. Such polyester compositions have an It.V.Type: ApplicationFiled: October 21, 2010Publication date: February 10, 2011Applicant: EASTMAN CHEMICAL COMPANYInventors: Frederick Leslie Colhoun, Michael Paul Ekart, Mary Therese Jernigan, Stephen Weinhold
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Patent number: 7863405Abstract: In one embodiment, there is provided a process comprising introducing polyester polymer particles containing residual acetaldehyde into a vessel at a temperature within a range of 130° C. to 195° C. to form a bed of particles within the vessel, flowing a gas through at least a portion of the particle bed, and withdrawing finished particles from the vessel having a reduced amount of residual acetaldehyde. In this process, it is not necessary to introduce a hot flow of gas at high flow rates otherwise required to heat up cool particles to a temperature sufficient to strip acetaldehyde. Rather, this process provides a benefit in that, if desired, gas introduced into the vessel at low flow rates and low temperatures can nevertheless effectively strip acetaldehyde in a reasonable time because the hot particles quickly heat a the gas to the particle temperature.Type: GrantFiled: December 21, 2004Date of Patent: January 4, 2011Assignee: Eastman Chemical CompanyInventors: Rodney Scott Armentrout, Frederick Leslie Colhoun, Michael Paul Ekart, Bruce Roger DeBruin