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).

  • Publication number: 20240043644
    Abstract: 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: Application
    Filed: October 6, 2023
    Publication date: February 8, 2024
    Inventors: Kaoru Aou, Yibei Gu, Rajat Duggal, Yasmin N. Srivastava, Joseph Jacobs, Qinghao Meng, Gregoire Cardoen, Ralph C. Even, Morgan A. Springs
  • Patent number: 11472910
    Abstract: 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: Grant
    Filed: May 18, 2018
    Date of Patent: October 18, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Yanli Feng, Weijun Zhou, Luigi Bertucelli, Rajat Duggal, Yibei Gu, Wei Liu, Davide Micheletti
  • Patent number: 11447597
    Abstract: 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: Grant
    Filed: September 7, 2017
    Date of Patent: September 20, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Huifeng Qian, Rajat Duggal, Muhammad A. Shafi, Luigi Pellacani, Harshad M. Shah
  • Publication number: 20220153994
    Abstract: 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: Application
    Filed: March 23, 2020
    Publication date: May 19, 2022
    Inventors: Bindu Krishnan, Praveen Agarwal, William J. Harris, Qiuyun Xu, Rajat Duggal
  • Patent number: 11225550
    Abstract: 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: Grant
    Filed: December 11, 2017
    Date of Patent: January 18, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Christopher S. Letko, Harshad M. Shah, Rajat Duggal, Nathan Wilmot
  • Publication number: 20210277178
    Abstract: 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: Application
    Filed: December 11, 2017
    Publication date: September 9, 2021
    Inventors: Christopher S. Letko, Harshad M. Shah, Rajat Duggal, Nathan Wilmot
  • Publication number: 20210206937
    Abstract: 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: Application
    Filed: January 15, 2021
    Publication date: July 8, 2021
    Inventors: Kaoru Aou, Yibei Gu, Rajat Duggal, Yasmin N. Srivastava, Joseph Jacobs, Qinghao Meng, Gregoire Cardoen, Ralph C. Even, Morgan A. Springs
  • Publication number: 20210061939
    Abstract: 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: Application
    Filed: May 18, 2018
    Publication date: March 4, 2021
    Applicant: Dow Global Technologies LLC
    Inventors: Yanli Feng, Weijun Zhou, Luigi Bertucelli, Rajat Duggal, Yibei Gu, Wei Liu, Davide Micheletti
  • Publication number: 20190375882
    Abstract: 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: Application
    Filed: September 7, 2017
    Publication date: December 12, 2019
    Applicant: Dow Global Technologies LLC
    Inventors: Huifeng Qian, Rajat Duggal, Muhammad A. Shafi, Luigi Pellacani, Harshad M. Shah
  • Publication number: 20190211171
    Abstract: 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: Application
    Filed: June 1, 2017
    Publication date: July 11, 2019
    Inventors: Kaoru Aou, Yibei Gu, Rajat Duggal, Yasmin N. Srivastava, Joseph Jacobs, Qinghao Meng, Gregoire Cardoen, Ralph C. Even, Morgan A. Springs
  • Patent number: 9969837
    Abstract: 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: Grant
    Filed: August 29, 2012
    Date of Patent: May 15, 2018
    Assignee: Dow Global Technologies LLC
    Inventors: Rajat Duggal, Nathan Wilmot, Richard J. Keaton, Duane R. Romer, Peter M. Margl
  • Patent number: 9840575
    Abstract: 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: Grant
    Filed: October 26, 2015
    Date of Patent: December 12, 2017
    Inventors: Yasmin N. Srivastava, Rogelio Gamboa, Rajat Duggal
  • Patent number: 9771450
    Abstract: 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: Grant
    Filed: December 13, 2013
    Date of Patent: September 26, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Kwanho Chang, Jia Xie, Shouren Ge, Nathan Wilmot, Rajat Duggal
  • Publication number: 20170260316
    Abstract: 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: Application
    Filed: October 26, 2015
    Publication date: September 14, 2017
    Inventors: Yasmin N. Srivastava, Rogelio Gamboa, Rajat Duggal
  • Patent number: 9718915
    Abstract: 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: Grant
    Filed: May 12, 2015
    Date of Patent: August 1, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Richard Keaton, Peter M. Margl, Duane R. Romer, Nathan Wilmot, Rajat Duggal, Rashmi Chamsarkar
  • Patent number: 9664282
    Abstract: 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: Grant
    Filed: August 14, 2014
    Date of Patent: May 30, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Rajat Duggal, Subodh P. Jagtap
  • Patent number: 9657118
    Abstract: 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: Grant
    Filed: December 19, 2012
    Date of Patent: May 23, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Kaoru Aou, Rajat Duggal, Marvin L. Dettloff, Theofanis Theofanous, Eddy Garcia-Meitin, Nikhil Verghese
  • Patent number: 9518147
    Abstract: 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: Grant
    Filed: September 24, 2013
    Date of Patent: December 13, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Angela I. Padilla-Acevedo, Nathan Wilmot, Rajat Duggal, Harshad M. Shah, Kwanho Chang
  • Patent number: 9518145
    Abstract: 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: Grant
    Filed: September 9, 2015
    Date of Patent: December 13, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Richard Keaton, Peter Margl, Duane Romer, Nathan Wilmot, Rajat Duggal, Rashmi Chamsarkar
  • Patent number: 9416214
    Abstract: 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: Grant
    Filed: March 26, 2013
    Date of Patent: August 16, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: Richard J. Keaton, Peter M. Margl, Rajat Duggal, Scott D. Boelter, Duane R. Romer, Nathan Wilmot