Patents by Inventor Narayana Padmanabha Iyer

Narayana Padmanabha Iyer 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).

  • Patent number: 9957357
    Abstract: There is described a polysiloxane having the structure: wherein R1, R2, and R3 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical, R4 is independently a direct bond or hydrocarbon radical optionally substituted with oxygen and nitrogen, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300; y is from 0 to 50; and z is from 0 to 50. The polysiloxane is used to make various copolymers and polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: May 1, 2018
    Assignee: Momentive Performance Materials, Inc.
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
  • Publication number: 20170066885
    Abstract: There is described a polysiloxane having the structure: wherein R1, R2, and R3 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical, R4 is independently a direct bond or hydrocarbon radical optionally substituted with oxygen and nitrogen, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300; y is from 0 to 50; and z is from 0 to 50. The polysiloxane is used to make various copolymers and polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Application
    Filed: November 18, 2016
    Publication date: March 9, 2017
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
  • Patent number: 9562159
    Abstract: Disclosed herein is a polyorganosiloxane having the structure of Formula I: wherein, R1 and R2 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical. R3 is an organic UV absorbing group, R4 independently is a direct bond, hydrocarbon radical optionally substituted with oxygen and nitrogen, or a group of Formula II(a) or Formula II(b) wherein A and B are a hydrocarbon radical, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300, y is from 0 to 50 and z is from 1 to 50. The polyorganosiloxane is used to make various copolymers or polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: February 7, 2017
    Assignee: Momentive Performance Material Inc.
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Roy Rojas-Wahl, Samim Alam
  • Patent number: 9518182
    Abstract: There is described a polysiloxane having the structure: wherein R1, R2, and R3 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical, R4 is independently a direct bond or hydrocarbon radical optionally substituted with oxygen and nitrogen, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300; y is from 0 to 50; and z is from 0 to 50. The polysiloxane is used to make various copolymers and polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: December 13, 2016
    Assignee: Momentive Performance Materials, Inc.
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
  • Patent number: 9376534
    Abstract: The invention is directed to phenyl-containing functional polysiloxanes and polycarbonate-polysiloxane copolymer compositions made therefrom having improved optical clarity and better low temperature impact resistance.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: June 28, 2016
    Assignee: Momentive Performance Materials Japan LLC
    Inventors: Koji Kanuma, Yataka Horie, Anuj Mittal, Laxmi Samantara, Indumathi Ramakrishnan, Naofumi Kumabe, Narayana Padmanabha Iyer, Samim Alam
  • Patent number: 9243152
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: January 26, 2016
    Assignee: Momentive Performance Materials Inc.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Publication number: 20160002412
    Abstract: Disclosed herein is a polyorganosiloxane having the structure of Formula I: wherein, R1 and R2 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical. R3 is an organic UV absorbing group, R4 independently is a direct bond, hydrocarbon radical optionally substituted with oxygen and nitrogen, or a group of Formula II(a) or Formula II(b) wherein A and B are a hydrocarbon radical, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300, y is from 0 to 50 and z is from 1 to 50. The polyorganosiloxane is used to make various copolymers or polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 7, 2016
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Roy Rojas-Wahl, Samim Alam
  • Publication number: 20160002410
    Abstract: There is described a polysiloxane having the structure: wherein R1, R2, and R3 are independently a hydrocarbon radical, an unsaturated radical, an alkoxy radical, an aryl radical or an alkenyloxy radical, R4 is independently a direct bond or hydrocarbon radical optionally substituted with oxygen and nitrogen, R5 is independently a hydrogen, a halogen, an aliphatic group having from 1 to 6 carbon atoms, an aromatic group having 6 to 8 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or an aryloxy group, R6 is independently a hydroxyl group, an amine group, an acid chloride group, or a sulfonyl halide group, x is from 1 to 300; y is from 0 to 50; and z is from 0 to 50. The polysiloxane is used to make various copolymers and polymer blends. A variety of articles can be made using the polysiloxane described as a polymer blend or copolymer.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 7, 2016
    Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
  • Publication number: 20150141586
    Abstract: The invention is directed to phenyl-containing functional polysiloxanes and polycarbonate-polysiloxane copolymer compositions made therefrom having improved optical clarity and better low temperature impact resistance.
    Type: Application
    Filed: May 30, 2014
    Publication date: May 21, 2015
    Applicant: MOMENTIVE PERFORMANCE MATERIALS JAPAN LLC
    Inventors: Koji Kanuma, Yataka Horie, Anuj Mittal, Laxmi Samantara, lndumathi Ramakrishnan, Naofumi Kumabe, Narayana Padmanabha Iyer, Samim Alam
  • Patent number: 8940397
    Abstract: Disclosed herein is a primer composition comprising an inorganic UV absorbing agent and a polymer selected from (i) a copolycarbonate, and (ii) a polyurethane obtained by reaction of a polyisocyanate and a copolycarbonate diol. Also disclosed is a coated article comprising a polymeric substrate, a primer layer disposed on at least one surface of said substrate, and an abrasion-resistant layer disposed on said primer layer, where the primer layer is made from the primer composition of the invention.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: January 27, 2015
    Assignee: Momentive Performance Materials Inc.
    Inventors: Honnaiah Mallesha, Anantharaman Dhanabalan, Robert F. Hayes, Narayana Padmanabha Iyer, Marc Schaepkens
  • Publication number: 20140221531
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Application
    Filed: April 8, 2014
    Publication date: August 7, 2014
    Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Patent number: 8728345
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: May 20, 2014
    Assignee: Momentive Performance Materials Inc.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Patent number: 8637157
    Abstract: Disclosed herein are novel copolycarbonates containing repeating units A and B respectively of the formulae: (A) —[R1OC(?O)O]—, and (B) —[(R2O)n-C(?O)—O]—, wherein the molar ratio of units (A) to units (B) is in the range of from about 9:1 to about 1:9, and wherein R1 is a divalent C8 to C12 alicyclic group, and R2 is ethylene or propylene, and n is an integer ranging from 4 to 40. Also disclosed are silicone hardcoat compositions containing the copolycarbonates and their derivatives. Upon cure, these silicone hardcoat compositions exhibit improved flexibility as compared to that of the conventional hardcoats while at the same time maintain the abrasion resistance of conventional silicone hardcoats.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: January 28, 2014
    Assignee: Momentive Performance Materials Inc.
    Inventors: Christoph Hilgers, Anantharaman Dhanabalen, Narayana Padmanabha Iyer, Shayne Joseph Landon
  • Publication number: 20130158159
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Publication number: 20120219803
    Abstract: Disclosed herein is a primer composition comprising an inorganic UV absorbing agent and a polymer selected from (i) a copolycarbonate, and (ii) a polyurethane obtained by reaction of a polyisocyanate and a copolycarbonate diol. Also disclosed is a coated article comprising a polymeric substrate, a primer layer disposed on at least one surface of said substrate, and an abrasion-resistant layer disposed on said primer layer, where the primer layer is made from the primer composition of the invention.
    Type: Application
    Filed: February 28, 2011
    Publication date: August 30, 2012
    Applicant: Momentive Performance Materials Inc.
    Inventors: Honnaiah Mallesha, Anantharaman Dhanabalan, Robert F. Hayes, Narayana Padmanabha Iyer, Marc Schaepkens
  • Publication number: 20120219802
    Abstract: Disclosed herein are novel copolycarbonates containing repeating units A and B respectively of the formulae: (A)—[R1OC(?O)O]—, and (B)—[(R2O)n-C(?O)—O]—, wherein the molar ratio of units (A) to units (B) is in the range of from about 9:1 to about 1:9, and wherein R1 is a divalent C8 to C12 alicyclic group, and R2 is ethylene or propylene, and n is an integer ranging from 4 to 40. Also disclosed are silicone hardcoat compositions containing the copolycarbonates and their derivatives. Upon cure, these silicone hardcoat compositions exhibit improved flexibility as compared to that of the conventional hardcoats while at the same time maintain the abrasion resistance of conventional silicone hardcoats.
    Type: Application
    Filed: February 28, 2011
    Publication date: August 30, 2012
    Applicant: Momentive Performance Materials Inc.
    Inventors: Christoph Hilgers, Anantharaman Dhanabalan, Narayana Padmanabha Iyer, Shayne Joseph Landon
  • Publication number: 20110237740
    Abstract: The present invention is directed to a composition having: (A) at least one silylated polyurethane resin containing polydiorganosiloxane; and, (B) at least one silylated polyurethane resin A.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 29, 2011
    Applicant: Momentive Performance Materials Inc.
    Inventors: Narayana Padmanabha Iyer, Anantharaman Dhanabalan, Jos Delis, Shayne Joseph Landon, Remy Gauthier
  • Patent number: 7863398
    Abstract: An improved process for preparing hydrolyzable polymers, the process includes, inter alia, reacting certain silylorganohalide compounds with a salt of a cyanate in the presence of active hydrogen containing polymers.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: January 4, 2011
    Assignee: Momentive Performance Materials Inc.
    Inventors: Mayanglambam Rebika Devi, Narayana Padmanabha Iyer, Suneel Kunamaneni, Anantharaman Dhanabalan, Arakali Sreenivasarao Radhakrishna
  • Publication number: 20080242825
    Abstract: An improved process for preparing hydrolyzable polymers, the process includes, inter alia, reacting certain silylorganohalide compounds with a salt of a cyanate in the presence of active hydrogen containing polymers.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 2, 2008
    Inventors: Mayanglambam Rebika Devi, Narayana Padmanabha Iyer, Suneel Kunamaneni, Anantharaman Dhanabalan, Arakali Sreenivasarao Radhakrishna