Patents by Inventor Thomas R. Doyle
Thomas R. Doyle 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: 10577450Abstract: The addition of a small amount of an alkyl sulfoxide, e.g., DMSO, to an isocyanate capped prepolymer provides a storage stable prepolymer composition in which the prepolymer is also highly activated towards curing with certain blocked curing agents such as methylenedianiline metal salt coordination complexes. The prepolymer/alkyl sulfoxide compositions are cured by said blocked curing agents at lower temperatures and/or at an accelerated rate compared to similar compositions lacking the alkyl sulfoxide providing high performance polyurethane elastomers.Type: GrantFiled: September 19, 2016Date of Patent: March 3, 2020Assignee: LANXESS Solutions US Inc.Inventor: Thomas R. Doyle
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Patent number: 10184042Abstract: Compositions comprising isocyanate capped polyurethane prepolymers and select mono-benzyl phthalate plasticizers, e.g., 7-(2,6,6,8-tetramethyl-4-oxa-3-oxo-nonyl) benzylphthalate, exhibit better isocyanate stability than prepolymer compositions comprising other plasticizers common in polyurethane systems. Curing compositions comprising these prepolymers, the select mono-benzyl phthalate plasticizers, and methylenedianiline coordination complex curing agents exhibit improved processing characteristics and yield elastomeric polyurethanes with lower compression set, higher break strength and lower color than similar composition comprising plasticizers such as benzoate plasticizers.Type: GrantFiled: November 1, 2016Date of Patent: January 22, 2019Assignee: LANXESS SOLUTIONS US INC.Inventor: Thomas R. Doyle
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Publication number: 20170137602Abstract: Compositions comprising isocyanate capped polyurethane prepolymers and select mono-benzyl phthalate plasticizers, e.g., 7-(2,6,6,8-tetramethyl-4-oxa-3-oxo-nonyl) benzylphthalate, exhibit better isocyanate stability than prepolymer compositions comprising other plasticizers common in polyurethane systems. Curing compositions comprising these prepolymers, the select mono-benzyl phthalate plasticizers, and methylenedianiline coordination complex curing agents exhibit improved processing characteristics and yield elastomeric polyurethanes with lower compression set, higher break strength and lower color than similar composition comprising plasticizers such as benzoate plasticizers.Type: ApplicationFiled: November 1, 2016Publication date: May 18, 2017Inventor: Thomas R. Doyle
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Publication number: 20170088660Abstract: The addition of a small amount of an alkyl sulfoxide, e.g., DMSO, to an isocyanate capped prepolymer provides a storage stable prepolymer composition in which the prepolymer is also highly activated towards curing with certain blocked curing agents such as methylenedianiline metal salt coordination complexes. The prepolymer/alkyl sulfoxide compositions are cured by said blocked curing agents at lower temperatures and/or at an accelerated rate compared to similar compositions lacking the alkyl sulfoxide providing high performance polyurethane elastomers.Type: ApplicationFiled: September 19, 2016Publication date: March 30, 2017Inventor: Thomas R. Doyle
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Patent number: 9371409Abstract: A process for preparing a curing composition of a coordination complex comprising methylenedianiline (MDA) and a salt, and less than 1000 of free MDA. The curing composition may be used in curing polyurethanes and epoxy resins.Type: GrantFiled: October 1, 2013Date of Patent: June 21, 2016Assignee: Chemtura CorporationInventors: Thomas R. Doyle, Ronald O. Rosenberg
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Patent number: 9321877Abstract: Plasticizer free curing compositions comprising small particle size complexes of methylenedianiline and an alkali salt, e.g. a 3:1 coordination complex of MDA/alkali salt, with average diameter 60 micron or less, often 20 micron or less, e.g., 10 microns or less, dispersed in a volatile, non-polar, organic solvent are prepared. Stable one pack urethane compositions comprising the plasticizer free curing compositions and polyurethane prepolymers are prepared, which exhibit excellent storage stability and overcome many of the drawbacks encountered when using MDA complexes dispersed in plasticizers such as high boiling aromatic and alkyl di-esters.Type: GrantFiled: September 3, 2014Date of Patent: April 26, 2016Assignee: Chemtura CorporationInventors: Thomas R. Doyle, Yujie Ding, Kevin Jackson, Ronald O. Rosenberg
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Patent number: 9006375Abstract: A method for preparing a polyurethane elastomer, the method comprising mixing an isocyanate terminated prepolymer and a nitrogen-containing organic salt to form a prepolymer mixture and reacting the prepolymer in the prepolymer mixture with a methylenedianiline metal salt coordination complex chain extender to form the polyurethane elastome. The nitrogen-containing organic salt is selected from the group consisting of an ammonium salt, an imidazolium salt, a pyridinium salt, a pyrrolidinium salt, a piperidinium salt, and a morpholinium salt.Type: GrantFiled: March 10, 2014Date of Patent: April 14, 2015Assignee: Chemtura CorporationInventors: Thomas R. Doyle, Mark P. Ferrandino, Ronald O. Rosenberg
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Publication number: 20150090931Abstract: A process for preparing a curing composition of a coordination complex comprising methylenedianiline (MDA) and a salt, and less than 1000 of free MDA. The curing composition may be used in curing polyurethanes and epoxy resins.Type: ApplicationFiled: October 1, 2013Publication date: April 2, 2015Inventors: Thomas R. Doyle, Mukund Shah, Ronald O. Rosenberg
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Publication number: 20150087797Abstract: Plasticizer free curing compositions comprising small particle size complexes of methylenedianiline and an alkali salt, e.g. a 3:1 coordination complex of MDA/alkali salt, with average diameter 60 micron or less, often 20 micron or less, e.g., 10 microns or less, dispersed in a volatile, non-polar, organic solvent are prepared. Stable one pack urethane compositions comprising the plasticizer free curing compositions and polyurethane prepolymers are prepared, which exhibit excellent storage stability and overcome many of the drawbacks encountered when using MDA complexes dispersed in plasticizers such as high boiling aromatic and alkyl di-esters.Type: ApplicationFiled: September 3, 2014Publication date: March 26, 2015Applicant: Chemtura CorporationInventors: THOMAS R. DOYLE, YUJIE DING, KEVIN JACKSON, RONALD O. ROSENBERG
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Publication number: 20140194588Abstract: A method for preparing a polyurethane elastomer, the method comprising mixing an isocyanate terminated prepolymer and a nitrogen-containing organic salt to form a prepolymer mixture and reacting the prepolymer in the prepolymer mixture with a methylenedianiline metal salt coordination complex chain extender to form the polyurethane elastome. The nitrogen-containing organic salt is selected from the group consisting of an ammonium salt, an imidazolium salt, a pyridinium salt, a pyrrolidinium salt, a piperidinium salt, and a morpholinium salt.Type: ApplicationFiled: March 10, 2014Publication date: July 10, 2014Applicant: CHEMTURA CORPORATIONInventors: Thomas R. Doyle, Mark P. Ferrandino, Ronald O. Rosenberg
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Patent number: 8754184Abstract: A prepolymer mixture for preparing a polyurethane elastomer, the mixture comprising an isocyanate terminated prepolymer and a nitrogen-containing organic salt. The nitrogen-containing organic salt may be selected from the group consisting of an ammonium salt, an imidazolium salt, a pyridinium salt, a pyrrolidinium salt, a piperidinium salt, and a morpholinium salt.Type: GrantFiled: October 28, 2010Date of Patent: June 17, 2014Assignee: Chemtura CorporationInventors: Thomas R. Doyle, Mark P. Ferrandino, Ronald O. Rosenberg
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Patent number: 8586682Abstract: A curing composition of a coordination complex comprising methylenedianiline (MDA) and a salt, and less than 1000 of free MDA. The curing composition may be used in curing polyurethanes and epoxy resins.Type: GrantFiled: April 6, 2010Date of Patent: November 19, 2013Assignee: Chemtura CorporationInventors: Thomas R. Doyle, Mukund Shah, Ronald O. Rosenberg
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Patent number: 8217133Abstract: In one aspect, the invention relates to storage-stable and flowable polyurethane compositions comprising (a) one or more isocyanate-terminated polyurethane prepolymers derived from one or more hydrocarbon ring-containing diisocyanates and/or triisocyanates and one or more polyols; (b) one or more metal salt complexes of methylenedianiline; and (c) one or more organic acid halide compounds having one or more acid halide groups, wherein the one or more organic acid halide compounds are in an amount wherein the acid halide groups are present in a minimum concentration of about 100 parts per million by weight of the polyurethane prepolymer. In other aspects, the invention relates to methods for storing the curable polyurethane compositions, as well as methods for producing polyurethane elastomers.Type: GrantFiled: February 5, 2007Date of Patent: July 10, 2012Assignee: Chemtura CorporationInventors: Phaniraj T. Nagaraj, R. Scott Archibald, Thomas R. Doyle, Ronald O. Rosenberg
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Publication number: 20110118431Abstract: A prepolymer mixture for preparing a polyurethane elastomer, the mixture comprising an isocyanate terminated prepolymer and a nitrogen-containing organic salt. The nitrogen-containing organic salt may be selected from the group consisting of an ammonium salt, an imidazolium salt, a pyridinium salt, a pyrrolidinium salt, a piperidinium salt, and a morpholinium salt.Type: ApplicationFiled: October 28, 2010Publication date: May 19, 2011Applicant: CHEMTURA CORPORATIONInventors: Thomas R. Doyle, Mark P. Ferrandino, Ronald O. Rosenberg
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Publication number: 20100256311Abstract: A curing composition of a coordination complex comprising methylenedianiline (MDA) and a salt, and less than 1000 of free MDA. The curing composition may be used in curing polyurethanes and epoxy resins.Type: ApplicationFiled: April 6, 2010Publication date: October 7, 2010Inventors: Thomas R. Doyle, Mukund Shah, Ronald O. Rosenberg
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Publication number: 20070213497Abstract: In one aspect, the invention relates to storage-stable and flowable polyurethane compositions comprising (a) one or more isocyanate-terminated polyurethane prepolymers derived from one or more hydrocarbon ring-containing diisocyanates and/or triisocyanates and one or more polyols; (b) one or more metal salt complexes of methylenedianiline; and (c) one or more organic acid halide compounds having one or more acid halide groups, wherein the one or more organic acid halide compounds are in an amount wherein the acid halide groups are present in a minimum concentration of about 100 parts per million by weight of the polyurethane prepolymer. In other aspects, the invention relates to methods for storing the curable polyurethane compositions, as well as methods for producing polyurethane elastomers.Type: ApplicationFiled: February 5, 2007Publication date: September 13, 2007Inventors: Phaniraj T. Nagaraj, R. Scott Archibald, Thomas R. Doyle, Ronald O. Rosenberg
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Patent number: 5973079Abstract: Impact modified styrenic polymers having a discontinuous rubber phase having a particle size of at least 4 micrometers may be polymerized in continuous stirred tank reactors, stirred plug flow reactors and continuous stirred loop reactors using an auger agitator.Type: GrantFiled: February 6, 1998Date of Patent: October 26, 1999Assignee: NOVA Chemicals (International ) S.A.Inventor: Thomas R. Doyle
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Patent number: 5629383Abstract: A stable partially polymerized syrup comprising dispersed rubber-like composite particles in a resin phase may be converted to a metastable syrup in which the rubber-like composite and resin phases are co-continuous by subjecting the stable syrup to high shear under pressure.Type: GrantFiled: May 10, 1996Date of Patent: May 13, 1997Assignee: Novacor Chemicals (Internatioanal) SAInventor: Thomas R. Doyle
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Patent number: 5551859Abstract: The present invention provides in a bulk polymerization reactor chain suitable for polymerizing a syrup of one or more monomers having dissolved therein one or more rubbers the improvement comprising a uniform shear field device. During polymerization at least a portion of the syrup polymerized to from 4 to 95% conversion passes through the uniform shear field device to produce at least a portion of a syrup having a rubber particle size more closely controlled than currently possible using a conventional reactor chain without a uniform shear field device.Type: GrantFiled: July 19, 1993Date of Patent: September 3, 1996Assignee: Novacor Chemicals (International) S.A.Inventors: James E. Cantrill, Thomas R. Doyle
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Patent number: 5550186Abstract: The volume average diameter of relatively large rubber-like composite particles dispersed through out a continuous resin phase may be reduced by subjecting the syrup to a shear field. The application of a uniform shear field generator to the relatively large rubber-like composite particle syrup is particularly desirable since it gives a high degree of control over the size and distribution of the dispersed rubber-like composite phase. As a result it is possible to optimize the particle size distribution in an impact modified thermoplastic and obtain better or a better balance of properties.Type: GrantFiled: April 17, 1995Date of Patent: August 27, 1996Assignee: Novacor Chemicals (International) S.A.Inventors: James E. Cantrill, Thomas R. Doyle