Patents by Inventor Takahiko Ohmura

Takahiko Ohmura 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: 11661488
    Abstract: An article comprising a polymeric foam, wherein the polymeric foam contains a continuous polymer matrix defining cells therein, the polymer matrix containing: (a) from 25 to 65 weight percent of one or more olefin block copolymer having a melt index of two grams per ten minutes or more, (b) from 65 to 25 weight percent of one or more chlorinated olefin polymer having a Mooney viscosity less than 60 (ML 1+4, 125° C.), and (c) from 5 to 30 weight parts of antimony trioxide relative to 100 weight parts of polymers in the polymeric foam, with weight percent values relative to total polymer weight in the polymeric foam; a process for preparing the article.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: May 30, 2023
    Assignee: Dow Global Technologies LLC
    Inventors: Yong Chen, Kim Walton, Wei Wang, Takahiko Ohmura
  • Patent number: 11292897
    Abstract: A composition comprising (A) from 10 wt % to 90 wt % of a propylene component including at least one propylene based polymer having a propylene content of at least 50.0 wt %, based on the total weight of the propylene based polymer, and a melt flow rate from 0.5 g/10 min to 200.0 g/10 min (ASTM D-1238 at 230° C., 2.16 kg); (B) from 1 wt % to 60 wt % of a polyolefin elastomer; (C) from 1 wt % to 20 wt % of a block composite comprising (i) an ethylene-propylene copolymer, (ii) an isotactic polypropylene copolymer, and (iii) a block copolymer including an ethylene-propylene soft block that has a same composition as the ethylene-propylene copolymer of the block composite and an isotactic polypropylene hard block that has a same composition as the isotactic polypropylene copolymer of the block composite; and (D) optionally, from 0.1 wt % to 10 wt % of an antioxidant.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: April 5, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Olaf Henschke, Yahong Zhang, Wei Li, Hang Wu, Takahiko Ohmura, Yushan Hu, Ming Ming, Krischan Jeltsch
  • Publication number: 20220002527
    Abstract: Provided is a thermoplastic polyolefin composition that comprises (A) a polypropylene polymer, (B) an elastomer component, (C) an additive component and (D) a scavenger component. Said scavenger component comprises a polyacetoacetate compound that has the Formula (I) defined herein and a metal oxide. Provided also is an article made from said thermoplastic polyolefin composition.
    Type: Application
    Filed: November 29, 2018
    Publication date: January 6, 2022
    Inventors: Haiying Li, Shaoguang Feng, Andong Liu, Yonghua Gong, Jian Zou, Xiuhan Yang, Takahiko Ohmura
  • Publication number: 20200332101
    Abstract: A composition comprising (A) from 10 wt % to 90 wt % of a propylene component including at least one propylene based polymer having a propylene content of at least 50.0 wt %, based on the total weight of the propylene based polymer, and a melt flow rate from 0.5 g/10 min to 200.0 g/10 min (ASTM D-1238 at 230° C., 2.16 kg); (B) from 1 wt % to 60 wt % of a polyolefin elastomer; (C) from 1 wt % to 20 wt % of a block composite comprising (i) an ethylene-propylene copolymer, (ii) an isotactic polypropylene copolymer, and (iii) a block copolymer including an ethylene-propylene soft block that has a same composition as the ethylene-propylene copolymer of the block composite and an isotactic polypropylene hard block that has a same composition as the isotactic polypropylene copolymer of the block composite; and (D) optionally, from 0.1 wt % to 10 wt % of an antioxidant.
    Type: Application
    Filed: May 24, 2017
    Publication date: October 22, 2020
    Applicant: Dow Global Technologies LLC
    Inventors: Olaf HENSCHKE, Yahong ZHANG, Wei LI, Hang WU, Takahiko OHMURA, Yushan HU, Ming MING, Krischan JELTSCH
  • Publication number: 20170198111
    Abstract: An article comprising a polymeric foam, wherein the polymeric foam contains a continuous polymer matrix defining cells therein, the polymer matrix containing: (a) from 25 to 65 weight percent of one or more olefin block copolymer having a melt index of two grams per ten minutes or more, (b) from 65 to 25 weight percent of one or more chlorinated olefin polymer having a Mooney viscosity less than 60 (ML 1+4, 125° C.), and (c) from 5 to 30 weight parts of antimony trioxide relative to 100 weight parts of polymers in the polymeric foam, with weight percent values relative to total polymer weight in the polymeric foam; a process for preparing the article.
    Type: Application
    Filed: June 27, 2012
    Publication date: July 13, 2017
    Inventors: Yong Chen, Kim Walton, Wei Wang, Takahiko Ohmura
  • Patent number: 8883870
    Abstract: The foaming window for making a foam useful in the manufacture of artificial leather is expanded through the use of a foamable composition comprising (A) a propylene-?-olefin copolymer, (B) a molecular melt (MM) comprising 4,4?-oxydibenzenesulfonylazide (DPO-BSA) and an antioxidant, and (C) a blowing agent. The foaming window can be expanded such that foaming can occur at 220° C. for 20 to 200 or more seconds.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: November 11, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Yong Chen, Morgan M. Hughes, Ho Jin Chee, Takahiko Ohmura
  • Publication number: 20130303642
    Abstract: The foaming window for making a foam useful in the manufacture of artificial leather is expanded through the use of a foamable composition comprising (A) a propylene-?-olefin copolymer, (B) a molecular melt (MM) comprising 4,4?-oxydibenzenesulfonylazide (DPO-BSA) and an antioxidant, and (C) a blowing agent. The foaming window can be expanded such that foaming can occur at 220° C. for 20 to 200 or more seconds.
    Type: Application
    Filed: September 15, 2010
    Publication date: November 14, 2013
    Inventors: Yong Chen, Mongan M. Hughes, Ho Jin Chee, Takahiko Ohmura
  • Publication number: 20120108134
    Abstract: Artificial leather comprising a multi-layer structure comprises a top coating layer, a middle foam layer, and a bottom fabric layer. The top coating layer comprises a propylene- alpha-olefin copolymer in combination with one or more elastomeric compounds, the foam layer also comprises a propylene-alpha-olefin copolymer in combination with one or more elastomeric compounds plus a blowing agent, and the fabric layer comprises a nonwoven spunbond material.
    Type: Application
    Filed: May 18, 2010
    Publication date: May 3, 2012
    Inventors: Ho Jin Chee, Takahiko Ohmura, Ho-Sung Kang, Kim L. Walton
  • Patent number: 5405931
    Abstract: Electrical laminates can be prepared from an epoxy resin composition which comprises:(A) at least one epoxy resin having an average of more than one epoxy group per molecule;(B) an oligomer having a terminal phenolic hydroxyl group, which oligomer results from the reaction of a glycidyl ether of a halogenated phenolic compound and a halogenated phenolic compound; and(C) at least one catalyst for catalyzing a reaction between Component (A) and Component (B).
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: April 11, 1995
    Assignee: The Dow Chemical Company
    Inventors: Masahiko Kohno, Takahiko Ohmura, Masanori Noba
  • Patent number: 5364925
    Abstract: An epoxy resin composition useful in an electrical laminate, which composition comprises:(A) an epoxy resin prepared by reacting (A-1) an epoxy resin having an average of more than one, but less than three epoxy groups per molecule and (A-2) a phenolic compound having an average of more than one, but less than three hydroxyl groups per molecule at a ratio to provide an epoxy to phenolic equivalent ratio of 1:x;(B) y equivalent of a phenolic compound having an average of more than one, but less than three hydroxyl groups per molecule; and(C) at least one catalyst for catalyzing a reaction of Component (A) and Component (B);wherein x and y satisfy the following equations:x.gtoreq.0.01y.gtoreq.0.010.02.ltoreq.x+y<1.00.The disclosed epoxy resin composition, exhibits low viscosity when dissolved in an organic solvent and good heat resistance when cured.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: November 15, 1994
    Assignee: The Dow Chemical Company
    Inventors: Masahiko Kohno, Takahiko Ohmura