Patents by Inventor Stephen Michael Boyce
Stephen Michael Boyce 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: 11530293Abstract: Polyamide and amidoamine curing agents comprising a selectively modified amine. The selectively modified amine is formed by a substitution reaction between a polyamine and an epoxide, resulting in a multifunctional amine having a hydroxyl substituent. The curing agents are used to form epoxy resins having improved properties when cured.Type: GrantFiled: December 15, 2017Date of Patent: December 20, 2022Assignee: Evonik Operations GmbHInventors: Gauri Sankar Lal, Sudhir Ananthachar, Stephen Michael Boyce
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Patent number: 11365313Abstract: The present invention relates to a PVC plastisol composition comprising at least one vinyl chloride polymer selected from polyvinylchlorides and copolymers of vinyl chloride with one or more monomers; at least one plasticizer; at least one epoxy resin; and at least one isocyanate resin blocked with cardanol. The PVC plastisol composition of this invention provides strong adhesion to the surface of various metals or various undercoats of metals by thermal treatment for a short time at 100° C.-200° C. and is excellent in storage stability. In addition, it offers good rheological properties with improved yield value dosing and viscosity stability during applications compared to the nonylphenol blocked isocyanate PVC adhesion promotor.Type: GrantFiled: March 6, 2019Date of Patent: June 21, 2022Assignee: Evonik Operations GmbHInventors: Gauri Sankar Lal, Pritesh G. Patel, Stephen Michael Boyce
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Publication number: 20210147708Abstract: The present invention relates to a polyurea coating composition comprising (A) a polyisocyanate; (B) a polyaspartic ester; and (C) an aspartic ester. The polyaspartic ester (B) is represented by the structure below: where Z=a cycloalkyl, alkyl or aryl group, R1, R2=alkyl groups containing 1-10 carbon atoms; and n=2-4. The aspartic ester (C) is derived from a secondary heterocyclic amine in a 3-7 membered ring compound bearing at least one secondary amine functionality. This invention also relates to use of a polyurea coating composition comprising (A)-(C) for the preparation of a polyurea coating. This invention further relates to a process for preparing a polyaspartic/aspartic ester mixture in-situ by initially reacting an ester of fumaric acid or maleic acid with a polyamine and then reacting the unreacted ester of fumaric acid or maleic acid to completion with a secondary heterocyclic amine.Type: ApplicationFiled: April 24, 2019Publication date: May 20, 2021Inventors: Gauri Sankar Lal, Shafiq Fazel, Stephen Michael Boyce
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Publication number: 20210040301Abstract: The present invention relates to a PVC plastisol composition comprising at least one vinyl chloride polymer selected from polyvinylchlorides and copolymers of vinyl chloride with one or more monomers; at least one plasticizer; at least one epoxy resin; and at least one isocyanate resin blocked with cardanol. The PVC plastisol composition of this invention provides strong adhesion to the surface of various metals or various undercoats of metals by thermal treatment for a short time at 100° C-200° C. and is excellent in storage stability. In addition, it offers good rheological properties with improved yield value dosing and viscosity stability during applications compared to the nonylphenol blocked isocyanate PVC adhesion promotor.Type: ApplicationFiled: March 6, 2019Publication date: February 11, 2021Inventors: Gauri Sankar Lal, Pritesh G. Patel, Stephen Michael Boyce
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Publication number: 20200308339Abstract: Polyamide and amidoamine curing agents comprising a selectively modified amine. The selectively modified amine is formed by a substitution reaction between a polyamine and an epoxide, resulting in a multifunctional amine having a hydroxyl substituent. The curing agents are used to form epoxy resins having improved properties when cured.Type: ApplicationFiled: December 15, 2017Publication date: October 1, 2020Inventors: Gauri Sankar Lal, Sudhir Ananthachar, Stephen Michael Boyce
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Publication number: 20200123312Abstract: Polyamide and amidoamine curing agents comprising a selectively modified amine. The selectively modified amine is formed by a substitution reaction between a polyamine and an epoxide, resulting in a multifunctional amine having a hydroxyl substituent. The curing agents are used to form epoxy resins having improved properties when cured.Type: ApplicationFiled: December 15, 2017Publication date: April 23, 2020Applicant: Evonik Operations GmbHInventors: Gauri Sankar LAL, Sudhir ANANTHACHAR, Stephen Michael BOYCE
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Patent number: 10174154Abstract: An epoxy curing agent is disclosed that can be obtained by reacting at least one carboxylic acid with at least one polyamine. The disclosed curing agent can be obtained by preparing an amidoamine with about 0.15 to about 0.30 molar excess of carboxylic acid.Type: GrantFiled: November 4, 2015Date of Patent: January 8, 2019Assignee: Evonik Degussa GmbHInventors: Gauri Sankar Lal, Sudhir Ananthachar, Stephen Michael Boyce
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Patent number: 10035874Abstract: An epoxide based composition that can be cured at a temperature of less than about 70 C is disclosed. The composition is a liquid at ambient conditions and, therefore, can be used to rehabilitate the interior surfaces of pipelines. The epoxide-based composition comprises at least one epoxide component (component A) and at least one curing agent component (component B) wherein (A) the epoxide component comprises a phenyl glycidyl ether polyepoxide; and (B) the curing agent component comprises a mixture of two salt compounds formed, respectively, from an N-alkanol piperidine and a carboxylic acid bearing 7-12 carbon atoms, and N-cyclohexyl-N,N-dialkyl amine and a carboxylic acid bearing 7-12 carbon atoms.Type: GrantFiled: July 13, 2015Date of Patent: July 31, 2018Assignee: Evonik Degussa GmbHInventors: Gauri Sankar Lal, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Pritesh G. Patel
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Patent number: 10017603Abstract: Liquid epoxy curing agents that have improved latency over conventional liquid curing agents while retaining the physical properties of the cured material are disclosed. These liquid curing agents can be used for curing epoxy resins, or in combination with dicyandiamide (DICY) based curing agents in order to accelerate DICY curing.Type: GrantFiled: August 21, 2017Date of Patent: July 10, 2018Assignee: Evonik Degussa GmbHInventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak
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Publication number: 20170342197Abstract: Liquid epoxy curing agents that have improved latency over conventional liquid curing agents while retaining the physical properties of the cured material are disclosed. These liquid curing agents can be used for curing epoxy resins, or in combination with dicyandiamide (DICY) based curing agents in order to accelerate DICY curing.Type: ApplicationFiled: August 21, 2017Publication date: November 30, 2017Inventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak
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Patent number: 9738750Abstract: Liquid epoxy curing agents that have improved latency over conventional liquid curing agents while retaining the physical properties of the cured material are disclosed. These liquid curing agents can be used for curing epoxy resins, or in combination with dicyandiamide (DICY) based curing agents in order to accelerate DICY curing.Type: GrantFiled: April 5, 2013Date of Patent: August 22, 2017Assignee: Veonik Degussa GmbHInventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak
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Patent number: 9546243Abstract: The disclosure relates to solving problems associated with conventional latent epoxy curing agents by providing a new class of latent epoxy curing agents. In particular, the disclosure relates to epoxy curing agents with improved storage stability and low use level (e.g., less than about 10 wt % relative to the epoxy compound) by forming solid solutions of certain classes of amines in polyphenolic resins.Type: GrantFiled: July 17, 2013Date of Patent: January 17, 2017Assignee: Air Products and Chemicals, Inc.Inventors: Gamini Ananda Vedage, Gauri Sankar Lal, Stephen Michael Boyce, Atteye Houssein Abdourazak, Dilipkumar Nandlal Shah
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Publication number: 20160122467Abstract: An epoxy curing agent is disclosed that can be obtained by reacting at least one carboxylic acid with at least one polyamine. The disclosed curing agent can be obtained by preparing an amidoamine with about 0.15 to about 0.30 molar excess of carboxylic acid.Type: ApplicationFiled: November 4, 2015Publication date: May 5, 2016Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Gauri Sankar Lal, Sudhir Ananthachar, Stephen Michael Boyce
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Publication number: 20160017087Abstract: An epoxide based composition that can be cured at a temperature of less than about 70 C is disclosed. The composition is a liquid at ambient conditions and, therefore, can be used to rehabilitate the interior surfaces of pipelines. The epoxide-based composition comprises at least one epoxide component (component A) and at least one curing agent component (component B) wherein (A) the epoxide component comprises a phenyl glycidyl ether polyepoxide; and (B) the curing agent component comprises a mixture of two salt compounds formed, respectively, from an N-alkanol piperidine and a carboxylic acid bearing 7-12 carbon atoms, and N-cyclohexyl-N,N-dialkyl amine and a carboxylic acid bearing 7-12 carbon atoms.Type: ApplicationFiled: July 13, 2015Publication date: January 21, 2016Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Gauri Sankar Lal, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Pritesh G. Patel
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Patent number: 9080007Abstract: Carboxylic acid salts of tertiary amines for use as an accelerator for an anhydride based epoxy curing agents are disclosed. The disclosed carboxylic acid salts of certain tertiary amines are latent anhydride accelerators and enable epoxy resin curing when heated to an elevated temperature (e.g., an onset temperature of greater than about 50° C.).Type: GrantFiled: February 28, 2013Date of Patent: July 14, 2015Assignee: Air Products and Chemicals, Inc.Inventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Pritesh G. Patel, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak
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Publication number: 20150025201Abstract: The disclosure relates to solving problems associated with conventional latent epoxy curing agents by providing a new class of latent epoxy curing agents. In particular, the disclosure relates to epoxy curing agents with improved storage stability and low use level (e.g., less than about 10 wt % relative to the epoxy compound) by forming solid solutions of certain classes of amines in polyphenolic resins.Type: ApplicationFiled: July 17, 2013Publication date: January 22, 2015Inventors: Gamini Ananda VEDAGE, Gauri Sankar LAL, Stephen Michael BOYCE, Atteye Houssein ABDOURAZAK, Dilipkumar Nandlal SHAH
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Publication number: 20140303342Abstract: Liquid epoxy curing agents that have improved latency over conventional liquid curing agents while retaining the physical properties of the cured material are disclosed. These liquid curing agents can be used for curing epoxy resins, or in combination with dicyandiamide (DICY) based curing agents in order to accelerate DICY curing.Type: ApplicationFiled: April 5, 2013Publication date: October 9, 2014Applicant: Air Products and Chemicals, Inc.Inventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak
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Publication number: 20140243456Abstract: Carboxylic acid salts of tertiary amines for use as an accelerator for an anhydride based epoxy curing agents are disclosed. The disclosed carboxylic acid salts of certain tertiary amines are latent anhydride accelerators and enable epoxy resin curing when heated to an elevated temperature (e.g., an onset temperature of greater than about 50° C.).Type: ApplicationFiled: February 28, 2013Publication date: August 28, 2014Applicant: Air Products and Chemicals, Inc.Inventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Pritesh G. Patel, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak
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Patent number: 6962964Abstract: This invention relates to improved polyepoxide resins cured with a mixture of methylene bridged poly(cycloaliphatic-aromatic)amines and a process for preparing such polyepoxide resins as well as to the methylene bridged poly(cycloaliphatic-aromatic)amine compositions and a method of making them. The improvement resides in using a curative (herein referred to as “Heavy MPCA”) comprised of the partially hydrogenated condensation product of formaldehyde and aniline or methyl substituted aniline containing a substantial amount (from 35 to 85% by weight, preferably 40 to 60% by weight) of oligomers in the form of 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 aniline or methyl substituted aniline derivatives.Type: GrantFiled: February 6, 2003Date of Patent: November 8, 2005Assignee: Air Products and Chemicals, Inc.Inventors: Michael Ulman, Gamini Ananda Vedage, David Alan Dubowik, Stephen Michael Boyce
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Publication number: 20040162409Abstract: This invention relates to improved polyepoxide resins cured with a mixture of methylene bridged poly(cycloaliphatic-aromatic)amines and a process for preparing such polyepoxide resins as well as to the methylene bridged poly(cycloaliphatic-aromatic)amine compositions and a method of making them. The improvement resides in using a curative (herein referred to as “Heavy MPCA”) comprised of the partially hydrogenated condensation product of formaldehyde and aniline or methyl substituted aniline containing a substantial amount (from 35 to 85% by weight, preferably 40 to 60% by weight) of oligomers in the form of 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 aniline or methyl substituted aniline derivatives.Type: ApplicationFiled: February 6, 2003Publication date: August 19, 2004Inventors: Michael Ulman, Gamini Ananda Vedage, David Alan Dubowik, Stephen Michael Boyce