Patents by Inventor Rajat Duggal
Rajat Duggal 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: 20240043644Abstract: A coated viscoelastic polyurethane foam includes a viscoelastic polyurethane foam having the coating thereon, the viscoelastic polyurethane foam having a resiliency of less than or equal to 20% as measured according to ASTM D3574, and a coating material on and embedded within the viscoelastic polyurethane foam, the coating material including an aqueous polymer emulsion and an encapsulated phase change material.Type: ApplicationFiled: October 6, 2023Publication date: February 8, 2024Inventors: Kaoru Aou, Yibei Gu, Rajat Duggal, Yasmin N. Srivastava, Joseph Jacobs, Qinghao Meng, Gregoire Cardoen, Ralph C. Even, Morgan A. Springs
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Patent number: 11472910Abstract: A polyisocyanate component, a polyurethane foaming system, and an article made therefrom, wherein the polyisocyanate component includes (a) a preformed mixture including an aromatic oxazolidone compound that is the reaction product of at least one aromatic epoxide and at least one first polyisocyanate having an average isocyanate functionality of no more than 2.7 and greater than 1.8, in the presence of at least one catalyst, the aromatic oxazolidone compound includes at least one free isocyanate group and at least one aromatic oxazolidone group, the aromatic oxazolidone group includes an aromatic group and an oxazolidone group, and (b) at least one second polyisocyanate has an average isocyanate functionality equal to or greater than 2.7 and less than 6.0. The second polyisocyanate is added to the preformed mixture to form the polyisocyanate component. The polyisocyanate component has a viscosity of no more than 4.0 Pa-sat 25° C.Type: GrantFiled: May 18, 2018Date of Patent: October 18, 2022Assignee: Dow Global Technologies LLCInventors: Yanli Feng, Weijun Zhou, Luigi Bertucelli, Rajat Duggal, Yibei Gu, Wei Liu, Davide Micheletti
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Patent number: 11447597Abstract: In various embodiments, a resin composition includes a urethane (meth)acrylate, a reactive diluent, and a urethane (meth)acrylate toughener. The urethane (meth)acrylate toughener includes at least one additional polyol having a number average molecular weight Mn of greater than 1,000 g/mol. Cured articles made from the resin composition have an average fracture toughness (KIc) value from 1 MPa*m1/2 to 3 MPa*m1/2 when measured in accordance with ASTM D5045. Processes for making the resin composition as well as processes using the resin composition are also provided.Type: GrantFiled: September 7, 2017Date of Patent: September 20, 2022Assignee: Dow Global Technologies LLCInventors: Huifeng Qian, Rajat Duggal, Muhammad A. Shafi, Luigi Pellacani, Harshad M. Shah
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Publication number: 20220153994Abstract: Polyurethanes are made by reacting, in one or more reaction steps, a) at least one organic polyisocyanate, b-1) one or more polyols having a hydroxyl equivalent weight of greater than 250 g/mol and a nominal hydroxyl functionality of 2 to 4 and b-2) at least one alkoxylated Mannich base to produce a polyurethane polymer having a density of at least 750 kg/m3 and a hard segment content of 20 to 80% by weight.Type: ApplicationFiled: March 23, 2020Publication date: May 19, 2022Inventors: Bindu Krishnan, Praveen Agarwal, William J. Harris, Qiuyun Xu, Rajat Duggal
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Patent number: 11225550Abstract: A reaction system for forming a step-growth polymerized sulfur-containing polyester polyol includes at least one sulfur-containing component selected from the group of a sulfur-containing polyol or a sulfur-containing polycarboxylic acid, an amount of the at least one sulfur-containing component being from 1 wt % to 60 wt %, at least one aromatic component selected from the group of an aromatic multi-functional ester, an aromatic multi-functional carboxylic acid, and an aromatic anhydride, an amount of the at least one aromatic component being from 1 wt % to 60 wt %, at least one simple polyol that excludes sulfur and is different from the sulfur containing polyol, an amount of the at least one simple polyol being from 0 wt % to 60 wt %, and at least one polymerization catalyst. The reaction system for forming the sulfur-containing polyester polyol has a sulfur content that is from 2 wt % to 20 wt %.Type: GrantFiled: December 11, 2017Date of Patent: January 18, 2022Assignee: Dow Global Technologies LLCInventors: Christopher S. Letko, Harshad M. Shah, Rajat Duggal, Nathan Wilmot
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Publication number: 20210277178Abstract: A reaction system for forming a step-growth polymerized sulfur-containing polyester polyol includes at least one sulfur-containing component selected from the group of a sulfur-containing polyol or a sulfur-containing polycarboxylic acid, an amount of the at least one sulfur-containing component being from 1 wt % to 60 wt %, at least one aromatic component selected from the group of an aromatic multi-functional ester, an aromatic multi-functional carboxylic acid, and an aromatic anhydride, an amount of the at least one aromatic component being from 1 wt % to 60 wt %, at least one simple polyol that excludes sulfur and is different from the sulfur containing polyol, an amount of the at least one simple polyol being from 0 wt % to 60 wt %, and at least one polymerization catalyst. The reaction system for forming the sulfur-containing polyester polyol has a sulfur content that is from 2 wt % to 20 wt %.Type: ApplicationFiled: December 11, 2017Publication date: September 9, 2021Inventors: Christopher S. Letko, Harshad M. Shah, Rajat Duggal, Nathan Wilmot
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Publication number: 20210206937Abstract: A coated viscoelastic polyurethane foam includes a viscoelastic polyurethane foam having the coating thereon, the viscoelastic polyurethane foam having a resiliency of less than or equal to 20% as measured according to ASTM D3574, and a coating material on and embedded within the viscoelastic polyurethane foam, the coating material including an aqueous polymer emulsion and an encapsulated phase change material.Type: ApplicationFiled: January 15, 2021Publication date: July 8, 2021Inventors: Kaoru Aou, Yibei Gu, Rajat Duggal, Yasmin N. Srivastava, Joseph Jacobs, Qinghao Meng, Gregoire Cardoen, Ralph C. Even, Morgan A. Springs
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Publication number: 20210061939Abstract: A polyisocyanate component, a polyurethane foaming system, and an article made therefrom, wherein the polyisocyanate component includes (a) a preformed mixture including an aromatic oxazolidone compound that is the reaction product of at least one aromatic epoxide and at least one first polyisocyanate having an average isocyanate functionality of no more than 2.7 and greater than 1.8, in the presence of at least one catalyst, the aromatic oxazolidone compound includes at least one free isocyanate group and at least one aromatic oxazolidone group, the aromatic oxazolidone group includes an aromatic group and an oxazolidone group, and (b) at least one second polyisocyanate has an average isocyanate functionality equal to or greater than 2.7 and less than 6.0. The second polyisocyanate is added to the preformed mixture to form the polyisocyanate component. The polyisocyanate component has a viscosity of no more than 4.0 Pa-sat 25° C.Type: ApplicationFiled: May 18, 2018Publication date: March 4, 2021Applicant: Dow Global Technologies LLCInventors: Yanli Feng, Weijun Zhou, Luigi Bertucelli, Rajat Duggal, Yibei Gu, Wei Liu, Davide Micheletti
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Publication number: 20190375882Abstract: In various embodiments, a resin composition includes a urethane (meth)acrylate, a reactive diluent, and a urethane (meth)acrylate toughener. The urethane (meth)acrylate toughener includes at least one additional polyol having a number average molecular weight Mn of greater than 1,000 g/mol. Cured articles made from the resin composition have an average fracture toughness (KIc) value from 1 MPa*m1/2 to 3 MPa*m1/2 when measured in accordance with ASTM D5045. Processes for making the resin composition as well as processes using the resin composition are also provided.Type: ApplicationFiled: September 7, 2017Publication date: December 12, 2019Applicant: Dow Global Technologies LLCInventors: Huifeng Qian, Rajat Duggal, Muhammad A. Shafi, Luigi Pellacani, Harshad M. Shah
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Publication number: 20190211171Abstract: A coated viscoelastic polyurethane foam includes a viscoelastic polyurethane foam having the coating thereon, the viscoelastic polyurethane foam having a resiliency of less than or equal to 20% as measured according to ASTM D3574, and a coating material on and embedded within the viscoelastic polyurethane foam, the coating material including an aqueous polymer emulsion and an encapsulated phase change material.Type: ApplicationFiled: June 1, 2017Publication date: July 11, 2019Inventors: Kaoru Aou, Yibei Gu, Rajat Duggal, Yasmin N. Srivastava, Joseph Jacobs, Qinghao Meng, Gregoire Cardoen, Ralph C. Even, Morgan A. Springs
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Patent number: 9969837Abstract: Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a tertiary amine catalyst having a molecular weight of up to 300 and from 0.01 to 1.0 mole per mole of the tertiary amine compound(s) of a non-protic, non-catalytic, metal-containing Lewis acid.Type: GrantFiled: August 29, 2012Date of Patent: May 15, 2018Assignee: Dow Global Technologies LLCInventors: Rajat Duggal, Nathan Wilmot, Richard J. Keaton, Duane R. Romer, Peter M. Margl
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Patent number: 9840575Abstract: A polyurethane foam for comfort application, includes the reaction product of a first composition that includes from 20 wt % to 80 wt % of an aqueous component and from 20 wt % to 80 wt % of a hydrophilic isocyanate-terminated prepolymer component. The aqueous component includes at least 90 wt % of water based on the total weight of the aqueous component and the hydrophilic isocyanate-terminated prepolymer component has a free NCO content from 1 wt % to 15 wt % and is a reaction product of a second composition that includes an isocyanate component and an isocyanate-reactive component.Type: GrantFiled: October 26, 2015Date of Patent: December 12, 2017Inventors: Yasmin N. Srivastava, Rogelio Gamboa, Rajat Duggal
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Patent number: 9771450Abstract: An epoxy composition that includes an epoxy-terminated prepolymer, an alkanolamine hardener having at least one hydroxyl group and an organometallic compound, where amine groups of the alkanolamine hardener react with epoxy groups of the epoxy-terminated prepolymer in a stoichiometric ratio to form a cured epoxy composition. The epoxy-terminated prepolymer is formed from a reaction product of an amine terminated polymeric polyol and a molar excess of epoxy groups in an epoxy monomer, relative to a molar amount of amine groups in the amine terminated polymeric polyol.Type: GrantFiled: December 13, 2013Date of Patent: September 26, 2017Assignee: Dow Global Technologies LLCInventors: Kwanho Chang, Jia Xie, Shouren Ge, Nathan Wilmot, Rajat Duggal
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Publication number: 20170260316Abstract: A polyurethane foam for comfort application, includes the reaction product of a first composition that includes from 20 wt % to 80 wt % of an aqueous component and from 20 wt % to 80 wt % of a hydrophilic isocyanate-terminated prepolymer component. The aqueous component includes at least 90 wt % of water based on the total weight of the aqueous component and the hydrophilic isocyanate-terminated prepolymer component has a free NCO content from 1 wt % to 15 wt % and is a reaction product of a second composition that includes an isocyanate component and an isocyanate-reactive component.Type: ApplicationFiled: October 26, 2015Publication date: September 14, 2017Inventors: Yasmin N. Srivastava, Rogelio Gamboa, Rajat Duggal
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Patent number: 9718915Abstract: Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a copper catalyst that contains at least one copper atom associated with a polydentate ligand that contains at least one nitrogen-containing complexing site.Type: GrantFiled: May 12, 2015Date of Patent: August 1, 2017Assignee: Dow Global Technologies LLCInventors: Richard Keaton, Peter M. Margl, Duane R. Romer, Nathan Wilmot, Rajat Duggal, Rashmi Chamsarkar
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Patent number: 9664282Abstract: A method for forming a piston seal of a hydraulic pump includes forming a reaction mixture that includes a prepolymer component, a polyol additive, a diol component, and a curative component, forming a sealing element with the reaction mixture and a mold, and curing the sealing element to form a piston seal of a hydraulic pump. The prepolymer component includes a polycarbonate-isocyanate prepolymer that is a reaction product of at least an isocyanate component and a polycarbonate polyol component.Type: GrantFiled: August 14, 2014Date of Patent: May 30, 2017Assignee: Dow Global Technologies LLCInventors: Rajat Duggal, Subodh P. Jagtap
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Patent number: 9657118Abstract: An epoxy thermoset that includes a reaction product of a toughening agent prepared from a reaction of a first epoxy resin and a polyether polyamine, a second epoxy resin and a liquid amine hardener for the toughening agent and the second epoxy resin. The toughening agent is an adduct of the second epoxy resin and the polyether polyamine. The polyether polyamine phase of the toughening agent separates to form particles in the epoxy thermoset, where the particles have a volume average diameter in a range from 20 nanometers to 200 nanometers.Type: GrantFiled: December 19, 2012Date of Patent: May 23, 2017Assignee: Dow Global Technologies LLCInventors: Kaoru Aou, Rajat Duggal, Marvin L. Dettloff, Theofanis Theofanous, Eddy Garcia-Meitin, Nikhil Verghese
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Patent number: 9518147Abstract: An amine endcapped adduct composition including an amine endcapped adduct formed from a monofunctional epoxide and a polyether amine. The monofunctional epoxide and the polyether amine are combined in a molar ratio of 1.0:2.0 to 1.0:8.0 moles of epoxide functionalities to moles of polyether amine functionalities.Type: GrantFiled: September 24, 2013Date of Patent: December 13, 2016Assignee: Dow Global Technologies LLCInventors: Angela I. Padilla-Acevedo, Nathan Wilmot, Rajat Duggal, Harshad M. Shah, Kwanho Chang
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Patent number: 9518145Abstract: Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a zinc catalyst that contains at least one zinc atom associated with a polydentate ligand that contains at least one nitrogen-containing complexing site.Type: GrantFiled: September 9, 2015Date of Patent: December 13, 2016Assignee: Dow Global Technologies LLCInventors: Richard Keaton, Peter Margl, Duane Romer, Nathan Wilmot, Rajat Duggal, Rashmi Chamsarkar
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Patent number: 9416214Abstract: Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a bismuth mono- or dithiocarbamate or mono- or dithiocarbonate salt.Type: GrantFiled: March 26, 2013Date of Patent: August 16, 2016Assignee: Dow Global Technologies LLCInventors: Richard J. Keaton, Peter M. Margl, Rajat Duggal, Scott D. Boelter, Duane R. Romer, Nathan Wilmot