Patents by Inventor Aroop K. Roy

Aroop K. Roy 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: 10717752
    Abstract: A process for producing a silylated product comprises reacting a mixture comprising (a) an unsaturated compound containing at least one unsaturated functional group, (b) a silyl hydride containing at least one silylhydride functional group, and (c) a catalyst, optionally in the presence of a solvent, to produce a dehydrogenative silylated product, a hydrosilylated product, or a combination of a dehydrogenative silylated product and a hydrosilylated product, wherein the catalyst is chosen from a pyridine diimine cobalt dicarboxylate complex or a cobalt carboxylate compound, and the process is conducted without pre-activating the catalyst via a reducing agent and/or without an initiator or promoter compound. The present catalysts have been found to be active in the presence of the silyl hydride employed in the silylation reaction.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: July 21, 2020
    Assignees: MOMENTIVE PERFORMANCE MATERIALS INC., PRINCETON UNIVERSITY
    Inventors: Paul Chirik, Christopher Schuster, Julie Boyer, Kenrick Lewis, Johannes G. P. Delis, Aroop K. Roy
  • Patent number: 10513584
    Abstract: A process and composition for the hydrosilylation of an unsaturated compound comprising reacting (a) a silyl hydride with (b) an unsaturated compound in the presence of (c) a platinum compound and (d) a cyclodiene, with the proviso that when the unsaturated compound is a terminal alkyne, the silyl hydride is other than a halosilane. The process and composition optionally comprise an inhibitor (e). The process and composition may be employed to form a variety of hydrosilylation products.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: December 24, 2019
    Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Aroop K. Roy, Julie L. Boyer
  • Publication number: 20180291154
    Abstract: A process and composition for the hydrosilylation of an unsaturated compound comprising reacting (a) a silyl hydride with (b) an unsaturated compound in the presence of (c) a platinum compound and (d) a cyclodiene, with the proviso that when the unsaturated compound is a terminal alkyne, the silyl hydride is other than a halosilane. The process and composition optionally comprise an inhibitor (e). The process and composition may be employed to form a variety of hydrosilylation products.
    Type: Application
    Filed: June 15, 2018
    Publication date: October 11, 2018
    Inventors: Aroop K. Roy, Julie L. Boyer
  • Patent number: 10047108
    Abstract: A process for the hydrosilylation of an unsaturated compound comprising reacting (a) a silyl hydride with (b) an unsaturated compound in the presence of (c) a platinum based hydrosilylation catalyst comprising a platinum-diene complex with chelating anions. The use of the present catalysts in the process provides silylated products in good yields and allows for using lower platinum loadings than conventional catalysts, reduced cycle times, and may reduce yellowing in the product.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: August 14, 2018
    Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Julie L. Boyer, Aroop K. Roy, David Jenkins, Indraneel Kundu
  • Publication number: 20180201634
    Abstract: A process for producing a silylated product comprises reacting a mixture comprising (a) an unsaturated compound containing at least one unsaturated functional group, (b) a silyl hydride containing at least one silylhydride functional group, and (c) a catalyst, optionally in the presence of a solvent, to produce a dehydrogenative silylated product, a hydrosilylated product, or a combination of a dehydrogenative silylated product and a hydrosilylated product, wherein the catalyst is chosen from a pyridine diimine cobalt dicarboxylate complex or a cobalt carboxylate compound, and the process is conducted without pre-activating the catalyst via a reducing agent and/or without an initiator or promoter compound. The present catalysts have been found to be active in the presence of the silyl hydride employed in the silylation reaction.
    Type: Application
    Filed: July 22, 2016
    Publication date: July 19, 2018
    Inventors: Paul CHIRIK, Christopher SCHUSTER, Julie BOYER, Kenrick LEWIS, Johannes G.P. DELIS, Aroop K. ROY
  • Patent number: 10000611
    Abstract: A process and composition for the hydrosilylation of an unsaturated compound comprising reacting (a) a silyl hydride with (b) an unsaturated compound in the presence of (c) a platinum compound and (d) a cyclodiene, with the proviso that when the unsaturated compound is a terminal alkyne, the silyl hydride is other than a halosilane. The process and composition optionally comprise an inhibitor (e). The process and composition may be employed to form a variety of hydrosilylation products.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: June 19, 2018
    Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Aroop K. Roy, Julie L. Boyer
  • Publication number: 20170057980
    Abstract: A process for the hydrosilylation of an unsaturated compound comprising reacting (a) a silyl hydride with (b) an unsaturated compound in the presence of (c) a platinum based hydrosilylation catalyst comprising a platinum-diene complex with chelating anions. The use of the present catalysts in the process provides silylated products in good yields and allows for using lower platinum loadings than conventional catalysts, reduced cycle times, and may reduce yellowing in the product.
    Type: Application
    Filed: December 15, 2015
    Publication date: March 2, 2017
    Inventors: Julie L. Boyer, Aroop K. Roy, David Jenkins, Indraneel Kundu
  • Publication number: 20160102178
    Abstract: A process and composition for the hydrosilylation of an unsaturated compound comprising reacting (a) a silyl hydride with (b) an unsaturated compound in the presence of (c) a platinum compound and (d) a cyclodiene, with the proviso that when the unsaturated compound is a terminal alkyne, the silyl hydride is other than a halosilane. The process and composition optionally comprise an inhibitor (e). The process and composition may be employed to form a variety of hydrosilylation products.
    Type: Application
    Filed: December 15, 2015
    Publication date: April 14, 2016
    Inventors: Aroop K. Roy, Julie L. Boyer
  • Patent number: 9051434
    Abstract: Branched organopolysiloxanes of low molecular weight contain bonded arylalkyl groups. Si—C bonded surfactant groups, preferably polyoxyalkylene polyether groups, and long chain alkyl groups, exhibit a high refractive index, are completely or partially self-emulsifying, and are compatible with a variety of cosmetically acceptable oils and solvents.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: June 9, 2015
    Assignee: Wacker Chemical Corporation
    Inventors: Aroop K. Roy, Amitabha Mitra, Michael L. Coffey
  • Patent number: 8796484
    Abstract: A polymerizable dimethicone copolyol macromer composition is synthesized by reacting itaconic anhydride with a dimethicone copolyol. During the reaction itaconic anhydride spontaneously isomerizes to citraconic anhydride which in turn is esterified by the dimethicone copolyol. The obtained macromers are copolymerizable with olefinically unsaturated monomers. Polymers containing the macromer repeating units are useful in a variety of applications including personal care, textile and industrial formulations to deliver softness, lubricity, fixative, water repellency, gloss, surface modification, and surfactant properties.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: August 5, 2014
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Aroop K. Roy, Krishnan Tamareselvy
  • Publication number: 20140212368
    Abstract: Branched organopolysiloxanes of low molecular weight contain bonded arylalkyl groups. Si—C bonded surfactant groups, preferably polyoxyalkylene polyether groups, and long chain alkyl groups, exhibit a high refractive index, are completely or partially self-emulsifying, and are compatible with a variety of cosmetically acceptable oils and solvents.
    Type: Application
    Filed: January 31, 2013
    Publication date: July 31, 2014
    Applicant: Wacker Chemical Corporation
    Inventors: Aroop K. Roy, Amitabha Mitra, Michael L. Coffey
  • Patent number: 5595593
    Abstract: A method of hydrophobing fillers such as inorganic pigments, metal oxides, metal hydroxides, and silicate minerals, involves contacting a filler with an oxa-silacycloalkane, until hydroxyl functionality on the filler is replaced with carbinol functionality (i.e. .tbd.C--OH). The preferred oxa-silacycloalkane is 2,2,4-trimethyl-1-oxa-2-silacyclopentane.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: January 21, 1997
    Assignee: Dow Corning Corporation
    Inventors: Gary T. Burns, Linda D. Kennan, Aroop K. Roy, Arthur J. Tselepis
  • Patent number: 5567848
    Abstract: An improved process for hydrosilating alkynes with hydridosilane using a cycloalkadiene-platinum complex as catalyst. The use of the cycloalkadiene-platinum complex as catalyst in the process reduces formation of the bis-silated adduct of the alkynes, when compared to the use of standard platinum-based hydrosilation catalysts.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: October 22, 1996
    Assignee: Dow Corning Corporation
    Inventor: Aroop K. Roy
  • Patent number: 5565596
    Abstract: An improved process for hydrosilating alkynes with organodihalosilanes and trihalosilanes in the presence of a platinum catalyst selected from a group consisting of platinum halides and reaction product of platinum halides with organosilicon compounds having terminal aliphatic unsaturation. The process uses a cycloalkene comprising about six to 20 carbon atoms as a catalyst modifier to reduce formation of the bis-silated adduct of the alkynes.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: October 15, 1996
    Assignee: Dow Corning Corporation
    Inventor: Aroop K. Roy
  • Patent number: 5563287
    Abstract: An improved process for hydrosilating alkynes with hydridosilane in the presence of a platinum catalyst selected from a group consisting of platinum halides and reaction product of platinum halides with organosilicon compounds having terminal aliphatic unsaturation. The process uses a cycloalkadiene comprising about six to 20 carbon atoms as a catalyst modifier to reduce formation of the bis-silated adduct of the alkynes.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: October 8, 1996
    Assignee: Dow Corning Corporation
    Inventor: Aroop K. Roy
  • Patent number: 5561210
    Abstract: A method for preparing a telechelic polydiene having at least 70% 1,4-microstructure and at least 70% of its end groups capped by silanol-terminated siloxane functionality is disclosed, said method comprising:(I) reacting, in a non-polar solvent solution,(A) at least one diene monomer,(B) a dianionic initiator which is soluble in said non-polar solvent and, optionally,(C) a polymerization adjuvant to form a dianionically active polydiene;(II) reacting said dianionically active polydiene from step (I) with(D) a cyclic siloxane, in the presence of(E) a promoter selected from the group consisting of an organic sulfoxide, a tertiary amide and mixtures thereof to cap both ends of said dianionically active polydiene; and(III) quenching the capped product from step (II).
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: October 1, 1996
    Assignee: Dow Corning Corporation
    Inventor: Aroop K. Roy
  • Patent number: 5521255
    Abstract: A method for preparing a telechelic polydiene having at least 70% 1,4-microstructure and at least 70% of its end groups capped by reactive silyl functionality is disclosed, said method comprising:(I) reacting, in a non-polar solvent solution,(A) at least one diene monomer,(B) a dianionic initiator which is soluble in said non-polar solvent and, optionally,(C) a polymerization adjuvant to form a dianionically active polydiene; and(II) capping both ends of said dianionically active polydiene from step (I) with(D) a silane, said capping being carried out in the presence of(E) a promoter selected from the group consisting of a tertiary amine and a crown ether based on 12-crown-4.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: May 28, 1996
    Assignee: Dow Corning Corporation
    Inventor: Aroop K. Roy
  • Patent number: 5290901
    Abstract: The present invention is a method for the preparation of carbinol-functional organosiloxanes and carbinol-functional organosiloxane resins. The method comprises contacting a cyclic silyl ether with an organosiloxane or an organosiloxane resin at a temperature within a range of about 25.degree. C. to 150.degree. C. The method may be conducted in the presence of an inert organic solvent to facilitate dissolution and contact of the reactants.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: March 1, 1994
    Assignee: Dow Corning Corporation
    Inventors: Gary T. Burns, Gary T. Decker, Aroop K. Roy
  • Patent number: 5288893
    Abstract: This invention provides novel organosulfonimidates and a method for preparing both the present sulfonimidates and those disclosed in the prior art. Some of the sufonimidates can be condensed under relatively mild conditions to form polyorganooxothiazenes.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: February 22, 1994
    Assignee: Dow Corning Corporation
    Inventor: Aroop K. Roy
  • Patent number: 5233019
    Abstract: This invention provides novel organosulfonimidates and a method for preparing both the present sulfonimidates and those disclosed in the prior art. Some of the sulfonimidates can be condensed under relatively mild conditions to form polyorganooxothiazenes.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: August 3, 1993
    Assignee: Dow Corning Corporation
    Inventor: Aroop K. Roy