Patents by Inventor Dongchan Ahn

Dongchan Ahn 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: 12234327
    Abstract: A polyorganosiloxanes has an anhydride functionality and an aromatic functionality, wherein a carbon of the aromatic functionality is separated from a carbon of a carbonyl group of the anhydride functionality by a carbon chain, wherein the polyorganosiloxane contains 5 weight-percent or more silicon atoms based on weight of the polyorganosiloxane.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: February 25, 2025
    Inventors: Dongchan Ahn, Zachary S. Kean, Thomas H. Peterson
  • Patent number: 12227650
    Abstract: A method of preparing a silicone-acrylate hybrid composition is provided. The method comprises irradiating an acrylate composition in the presence of: (i) a silicone article, and/or (ii) a silicone composition; to polymerize the acrylate composition and give the silicone-acrylate hybrid composition. The acrylate composition comprises an acrylate compound and an initiator.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: February 18, 2025
    Assignees: DOW GLOBAL TECHNOLOGIES LLC, DOW SILICONES CORPORATION, NORTHWESTERN UNIVERSITY
    Inventors: Dongchan Ahn, Jeremy Beebe, Shane Mangold, Ken Shull, Muzhou Wang, Anthony Silvaroli, Tyler Heyl
  • Publication number: 20250010812
    Abstract: This disclosure relates to one-piece woven airbags coated with a cured product of hydrosilylation curable silicone rubber coating compositions and to a process for coating the one-piece woven airbags with the hydrosilylation curable silicone rubber coating compositions. The resulting one-piece woven airbags coated with a cured product of the hydrosilylation curable silicone rubber coating compositions are of a reduced mean dry coat weight while maintaining the properties of previous one-piece woven airbags coated with standard, thicker coatings.
    Type: Application
    Filed: November 10, 2022
    Publication date: January 9, 2025
    Inventors: Elizabeth M. SANTOS, Dongchan AHN, Thomas D. BEKEMEIER, Todd M. STARKE, Hiroshi AKITOMO, Tomoko TASAKI, Glenn GORDON
  • Publication number: 20240426048
    Abstract: A silicone rubber composition for textile coating is provided. The composition comprises: (A) an organopolysiloxane having on average at least one alkenyl group per molecule and having a viscosity at 25° C. of from 100 to 1,000,000 mPa s; (B) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule, wherein a content of the silicon atom-bonded hydrogen atoms is 0.5 mass % or less; (C) a hydrosilylation catalyst; (D) a reinforcing silica fine powder; (E) an adhesion promoter; and (F) an amino group-containing triazine compound, or a compound having a phenol backbone and an amide bond, wherein each compound has a molecular weight of from 120 to 700. The composition has good curability, and forms a silicone rubber with high elongation and small change in elongation even when the silicone rubber is subjected to heat-aging.
    Type: Application
    Filed: October 26, 2022
    Publication date: December 26, 2024
    Inventors: Hiroshi AKITOMO, Dongchan AHN
  • Publication number: 20240409696
    Abstract: There is provided a two-part moisture cure organopolysiloxane composition comprising a base part and a catalyst package part. The catalyst package part, despite comprising amino silane(s), alkoxy silane(s), tin catalyst(s) and optionally reinforcing filler(s) and/or extending filler(s) in a carrier fluid, undergoes minimal phase separation during storage. This is achieved by utilizing one or more polyarylorganosiloxane polymers or silicone copolymers thereof as the carrier fluid, enabling the catalyst package part to be stored and function as a shelf stable continuous phase.
    Type: Application
    Filed: September 26, 2022
    Publication date: December 12, 2024
    Inventors: Christine MARCHAND, Dongchan AHN, Tommy DETEMMERMAN, Stephen HLINKA, II
  • Publication number: 20240400828
    Abstract: A silicone-polyolefin composition is disclosed. The silicone-polyolefin composition comprises (A) a polysiloxane, (B) In a functionalized polyolefin, (C) a polyolefin that is not reactable with components (A) or (B), and (D) a curable silicone comprising at least one of an elastomer component or a liquid rubber. The polysiloxane (A) comprises an average of at least one functional group X per molecule, and the functionalized polyolefin (B) comprises an average of at least one functional group Y per molecule, where the functional group X and functional group Y are reactable to form a bond therebetween. A silicone-polyolefin blend, a curable composition comprising the silicone-polyolefin blend, a cured product of the curable composition, and methods of preparing the silicone-polyolefin blend, curable composition, and cured product are also disclosed.
    Type: Application
    Filed: September 29, 2022
    Publication date: December 5, 2024
    Inventors: Zachary KEAN, Dongchan AHN, Noel Mower CHANG, Jin WANG, Kacee B. ENDER, Peter WALLER, Thomas PETERSON, Marc-Andre COURTEMANCHE
  • Publication number: 20240400829
    Abstract: A two-part moisture cure organopolysiloxane composition comprising a base part and a catalyst package part is provided. The catalyst package part, despite comprising amino silane(s), alkoxy silane(s), and tin catalyst(s) and optionally reinforcing filler(s) and/or extending filler(s) in a carrier fluid, undergoes minimal phase separation during storage. This is achieved by utilizing silicon-free linear or branched polyethers comprising repeating units having the average formula (—CnH2n—O—)y wherein n is an integer from 3 to 6 inclusive and y is at least four, comprising one or more —OH terminal groups, —OR10 terminal groups or —OH and —OR10 terminal groups where R10 is an optionally functionalised hydrocarbon group having from 1 to 12 carbons; as the carrier fluid, enabling the catalyst package part to function as a shelf stable continuous phase.
    Type: Application
    Filed: September 26, 2022
    Publication date: December 5, 2024
    Inventors: Christine MARCHAND, Dongchan AHN, Tommy DETEMMERMAN, Thierry DESSILLY, Stephen HLINKA, II
  • Publication number: 20240400830
    Abstract: A two-part moisture cure organopolysiloxane composition comprising a base part and a catalyst package part is provided. The catalyst package part undergoes minimal phase separation during storage despite comprising amino silane(s), alkoxy silane(s), and tin catalyst(s) and optionally reinforcing filler(s) and/or extending filler(s). This is given by the utilization of one or more linear or branched polyethers as a carrier fluid thereby enabling the catalyst package part to function as a shelf stable continuous phase.
    Type: Application
    Filed: September 26, 2022
    Publication date: December 5, 2024
    Inventors: Christine MARCHAND, Dongchan AHN, Thierry DESSILLY, Tommy DETEMMERMAN, Stephen HLINKA, II
  • Publication number: 20240141111
    Abstract: A silicone-polyolefin composition is disclosed. The silicone-polyolefin composition comprises (A) a polysiloxane, (B) a functionalized polyolefin, and (C) a curable silicone elastomer component. The polysiloxane (A) comprises an average of at least one functional group X per molecule, and the functionalized polyolefin (B) comprises an average of at least one functional group Y per molecule, where the functional group X and functional group Y are reactable to form a bond therebetween. A silicone-polyolefin blend, a curable composition comprising the silicone-polyolefin blend, a cured product of the curable composition, and methods of preparing the silicone-polyolefin blend, curable composition, and cured product are also disclosed.
    Type: Application
    Filed: February 10, 2022
    Publication date: May 2, 2024
    Inventors: Dongchan AHN, Noel Mower CHANG, Marc-Andre COURTEMANCHE, Zachary KEAN, Thomas H. PETERSON
  • Publication number: 20240132671
    Abstract: The present disclosure relates to curable silicone elastomer compositions having enhanced adhesive properties with respect to a wide variety of substrates (hereafter referred to as “curable silicone elastomer compositions”). Elastomers made by curing the curable silicone elastomer compositions may be adhered to a wide variety of substrates to form composites comprising the elastomers and the substrates. Processes for adhering the elastomers made by curing the curable silicone elastomer compositions to the substrates are also provided. An adhesion promoter, component (D), is provided to enhance adhesion. Component (D) is a polyorganosiloxane having (i) at least one unsaturated group per molecule selected from alkenyl groups and alkynyl groups and (ii) an anhydride functionality and an aromatic functionality, wherein a carbon of the aromatic functionality is separated from a carbon of a carbonyl group of the anhydride by a carbon chain of from 1 to 3 non-aromatic carbon atoms inclusive.
    Type: Application
    Filed: February 8, 2022
    Publication date: April 25, 2024
    Inventors: Dongchan AHN, Elizabeth SANTOS, Kyle MCDONALD, Nicholas TOMALIA, Joseph SOOTSMAN, Zachary KEAN, Thomas PETERSON
  • Publication number: 20240132721
    Abstract: A flowable silicone-polyolefin composition is disclosed. The silicone-polyolefin composition comprises (A) a polysiloxane and (B) a functionalized polyolefin dispersed in the polysiloxane (A). The polysiloxane (A) comprises an average per molecule of at least one functional group X, and the functionalized polyolefin (B) comprises an average per molecule of at least one functional group Y that is reactable with the functional group X of the polysiloxane (A) to form a bond therebetween. A curable composition comprising the flowable silicone-polyolefin composition, a cured product of the curable composition, and methods of preparing the flowable silicone-polyolefin composition, curable composition, and cured product are also disclosed.
    Type: Application
    Filed: February 10, 2022
    Publication date: April 25, 2024
    Inventors: Dongchan AHN, Noel Mower CHANG, Alyssa FIELITZ, Zachary KEAN, Thomas H. PETERSON, Peter WALLER
  • Publication number: 20240010797
    Abstract: A composition contains filler particles dispersed in a matrix material, wherein the matrix material includes: (a) a first polyorganosiloxane that comprises an average of 2 or more succinic anhydride groups per molecule; and (b) a second polyorganosiloxane other than the first polyorganosiloxane; wherein the filler particles are present at a concentration in a range of 15 to 80 volume-percent based on composition volume and wherein the first polyorganosiloxane is present at a concentration sufficient to provide succinic anhydride groups at a concentration of 0.30 to 200 micromoles per gram of matrix material.
    Type: Application
    Filed: January 13, 2022
    Publication date: January 11, 2024
    Inventors: Zhanjie Li, Kyle McDonald, Andrés E. Becerra, Joseph Sootsman, Chi-Hao Chang, Darren Hansen, Dongchan Ahn, Richard Cooper
  • Publication number: 20230407093
    Abstract: A composition contains: (a) a first polyorganosiloxane; (b) 50-80 volume percent, based on composition volume, of conductive fillers; and (c) 0.1 to 2.0 weight-percent, based on composition weight, of a second polyorganosiloxane different from the first polyorganosiloxane, the second polyorganosiloxane having an average of 0.5 to 1.5 anhydride groups per molecule.
    Type: Application
    Filed: January 13, 2022
    Publication date: December 21, 2023
    Inventors: Dan Zhao, Shane Mangold, Richard Cooper, Dongchan Ahn, Kyle McDonald, Joseph Sootsman, Darren Hansen
  • Publication number: 20230303891
    Abstract: There is provided curable silicone elastomer compositions having enhanced adhesive properties with respect to a wide variety of substrates. The curable silicone elastomer compositions described herein are provided with a phenylmethylpolysiloxane based additive which comprises at least one, alternatively at least two Si-H groups per molecule and at least one, alternatively at least two anhydride functional groups per molecule. Said phenylmethylpolysiloxane based additives provide resulting elastomers with improved heat-humidity stabilization.
    Type: Application
    Filed: June 23, 2021
    Publication date: September 28, 2023
    Inventors: Elizabeth M. SANTOS, Eric JOFFRE, Devin FERGUSON, Dongchan AHN, Scott D. BOELTER
  • Publication number: 20230093828
    Abstract: A curable composition is disclosed. The curable composition comprises (I) an epoxide-functional silicone-acrylate polymer and (II) an aminosiloxane. The epoxide-functional silicone-acrylate polymer comprises acrylate-derived monomeric units comprising siloxane moieties, epoxide-functional moieties, and optionally, hydrocarbyl moieties, and the aminosiloxane comprises an average of at least two amine functional groups per molecule. A method of preparing the curable composition is also disclosed, and includes reacting (A) an acryloxy-functional organosilicon component, (B) an epoxy-functional acrylate component, and optionally (C) an acrylate component, to give the epoxide-functional silicone-acrylate polymer (I), and combining the epoxide-functional silicone-acrylate polymer (I) with the aminosiloxane (II). An aminosiloxane-silicone-acrylate copolymer prepared with the composition, a cured product comprising the same, and methods of preparing the same, are also disclosed.
    Type: Application
    Filed: January 21, 2021
    Publication date: March 30, 2023
    Inventors: Erin B. VOGEL, Ray E. DRUMRIGHT, Richard COOPER, Jodi M. MECCA, Kangsang LEE, Myoungbae LEE, Matthew JELETIC, Dongchan AHN
  • Publication number: 20230086610
    Abstract: A curable composition is disclosed. The curable composition comprises (I) an epoxide-functional silicone-acrylate polymer, (II) an aminosiloxane, and (III) a conductive filler. The epoxide-functional silicone-acrylate polymer comprises acrylate-derived monomeric units comprising siloxane moieties, epoxide-functional moieties, and optionally, hydrocarbyl moieties, and the aminosiloxane comprises an average of at least two amine functional groups per molecule. Methods of preparing the curable composition, and a cured product thereof, are also disclosed. A method of forming a composite article comprising a conductive layer with the curable composition is disclosed is also disclosed. The method comprises disposing the curable composition on a substrate, and curing the curable composition to give a conductive layer on the substrate, thereby forming the composite article.
    Type: Application
    Filed: January 21, 2021
    Publication date: March 23, 2023
    Inventors: Richard COOPER, Jodi M. MECCA, Kangsang LEE, Dongchan AHN, Shane MANGOLD, Dan ZHAO, Kyle MCDONALD, Joseph SOOTSMAN
  • Publication number: 20230047536
    Abstract: A composition for forming a release coating is disclosed. The composition comprises (A) an organopolysiloxane comprising the reaction product of: (i) a silicone resin having a particular formula; and (ii) a cyclic siloxane; in the presence of a polymerization catalyst. The composition further comprises (B) an organopolysiloxane including an average of at least two silicon-bonded ethylenically unsaturated groups per molecule.
    Type: Application
    Filed: December 2, 2020
    Publication date: February 16, 2023
    Inventors: Pierre CHEVALIER, Zhenbin NIU, Sze-Sze NG, Sébastien GROFILS, Lori DEHLIN, Deana DUJARDIN, Alex KNOTT, David RICH, Thomas BEKEMEIER, Timothy P. MITCHELL, Dongchan AHN
  • Publication number: 20230042417
    Abstract: A method of preparing a silicone-acrylate hybrid composition is provided. The method comprises irradiating an acrylate composition in the presence of: (i) a silicone article, and/or (ii) a silicone composition; to polymerize the acrylate composition and give the silicone-acrylate hybrid composition. The acrylate composition comprises an acrylate compound and an initiator.
    Type: Application
    Filed: December 23, 2020
    Publication date: February 9, 2023
    Inventors: Dongchan AHN, Jeremy BEEBE, Shane MANGOLD, Ken SHULL, Muzhou WANG, Anthony SILVAROLI, Tyler HEYL
  • Publication number: 20220411588
    Abstract: A composition for forming a release coating is disclosed. The composition comprises (A) an organopolysiloxane comprising the reaction product of: (i) a silicone resin having a particular formula; (ii) a cyclic siloxane; and (iii) (iii) at least one of (A)(iii) (a) a branched organopolysiloxane having a particular formula or (A)(iii)(b) a terminating agent; in the presence of a polymerization catalyst. The composition further comprises (B) an organopolysiloxane including an average of at least two silicon-bonded ethylenically unsaturated groups per molecule.
    Type: Application
    Filed: December 2, 2020
    Publication date: December 29, 2022
    Inventors: Pierre CHEVALIER, Zhenbin NIU, Sze-Sze NG, Lori DEHLIN, Deana DUJARDIN, Alex KNOTT, David RICH, Thomas BEKEMEIER, Timothy P. MITCHELL, Dongchan AHN
  • Patent number: 11491461
    Abstract: A method and apparatus for removing an organosilicon component from a mixture are disclosed. The method and apparatus employ a copolymer of a di-alkenyl functional aromatic hydrocarbon and a polyorganosiloxane as the sorbent.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: November 8, 2022
    Assignee: Dow Silicones Corporation
    Inventors: Dongchan Ahn, Aaron Greiner, Robert Huber, James Thompson