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).
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Patent number: 9957357Abstract: 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: GrantFiled: November 18, 2016Date of Patent: May 1, 2018Assignee: Momentive Performance Materials, Inc.Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
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Publication number: 20170066885Abstract: 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: ApplicationFiled: November 18, 2016Publication date: March 9, 2017Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
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Patent number: 9562159Abstract: 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: GrantFiled: July 2, 2015Date of Patent: February 7, 2017Assignee: Momentive Performance Material Inc.Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Roy Rojas-Wahl, Samim Alam
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Patent number: 9518182Abstract: 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: GrantFiled: July 2, 2015Date of Patent: December 13, 2016Assignee: Momentive Performance Materials, Inc.Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
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Patent number: 9376534Abstract: 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: GrantFiled: May 30, 2014Date of Patent: June 28, 2016Assignee: Momentive Performance Materials Japan LLCInventors: Koji Kanuma, Yataka Horie, Anuj Mittal, Laxmi Samantara, Indumathi Ramakrishnan, Naofumi Kumabe, Narayana Padmanabha Iyer, Samim Alam
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Patent number: 9243152Abstract: 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: GrantFiled: April 8, 2014Date of Patent: January 26, 2016Assignee: Momentive Performance Materials Inc.Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
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Publication number: 20160002412Abstract: 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: ApplicationFiled: July 2, 2015Publication date: January 7, 2016Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Roy Rojas-Wahl, Samim Alam
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Publication number: 20160002410Abstract: 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: ApplicationFiled: July 2, 2015Publication date: January 7, 2016Inventors: Narayana Padmanabha Iyer, Indumathi Ramakrishnan, Anuj Mittal, Roy Rojas-Wahl, Samim Alam
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Publication number: 20150141586Abstract: 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: ApplicationFiled: May 30, 2014Publication date: May 21, 2015Applicant: MOMENTIVE PERFORMANCE MATERIALS JAPAN LLCInventors: Koji Kanuma, Yataka Horie, Anuj Mittal, Laxmi Samantara, lndumathi Ramakrishnan, Naofumi Kumabe, Narayana Padmanabha Iyer, Samim Alam
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Patent number: 8940397Abstract: 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: GrantFiled: February 28, 2011Date of Patent: January 27, 2015Assignee: Momentive Performance Materials Inc.Inventors: Honnaiah Mallesha, Anantharaman Dhanabalan, Robert F. Hayes, Narayana Padmanabha Iyer, Marc Schaepkens
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Publication number: 20140221531Abstract: 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: ApplicationFiled: April 8, 2014Publication date: August 7, 2014Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
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Patent number: 8728345Abstract: 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: GrantFiled: December 19, 2011Date of Patent: May 20, 2014Assignee: Momentive Performance Materials Inc.Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
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Patent number: 8637157Abstract: 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: GrantFiled: February 28, 2011Date of Patent: January 28, 2014Assignee: Momentive Performance Materials Inc.Inventors: Christoph Hilgers, Anantharaman Dhanabalen, Narayana Padmanabha Iyer, Shayne Joseph Landon
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Publication number: 20130158159Abstract: 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: ApplicationFiled: December 19, 2011Publication date: June 20, 2013Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
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Publication number: 20120219803Abstract: 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: ApplicationFiled: February 28, 2011Publication date: August 30, 2012Applicant: Momentive Performance Materials Inc.Inventors: Honnaiah Mallesha, Anantharaman Dhanabalan, Robert F. Hayes, Narayana Padmanabha Iyer, Marc Schaepkens
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Publication number: 20120219802Abstract: 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: ApplicationFiled: February 28, 2011Publication date: August 30, 2012Applicant: Momentive Performance Materials Inc.Inventors: Christoph Hilgers, Anantharaman Dhanabalan, Narayana Padmanabha Iyer, Shayne Joseph Landon
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Publication number: 20110237740Abstract: 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: ApplicationFiled: March 29, 2010Publication date: September 29, 2011Applicant: Momentive Performance Materials Inc.Inventors: Narayana Padmanabha Iyer, Anantharaman Dhanabalan, Jos Delis, Shayne Joseph Landon, Remy Gauthier
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Patent number: 7863398Abstract: 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: GrantFiled: March 27, 2007Date of Patent: January 4, 2011Assignee: Momentive Performance Materials Inc.Inventors: Mayanglambam Rebika Devi, Narayana Padmanabha Iyer, Suneel Kunamaneni, Anantharaman Dhanabalan, Arakali Sreenivasarao Radhakrishna
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Publication number: 20080242825Abstract: 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: ApplicationFiled: March 27, 2007Publication date: October 2, 2008Inventors: Mayanglambam Rebika Devi, Narayana Padmanabha Iyer, Suneel Kunamaneni, Anantharaman Dhanabalan, Arakali Sreenivasarao Radhakrishna