Patents by Inventor Hiroshi Kanbara

Hiroshi Kanbara 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).

  • Publication number: 20220289872
    Abstract: To provide a conjugated diene graft polymer having high transparency, heat resistance and weather resistance, and a method for producing the conjugated diene graft polymer. A method for producing a conjugated diene graft polymer in which a side chain (b) including a polymer including at least one monomer unit selected from the group consisting of a conjugated diene unit and an aromatic vinyl compound unit is bonded to a main chain (a) including a polymer including a conjugated diene unit, via a hetero atom Z serving as a branching point and having a valence of not less than 3, the method including a step of reacting a specific active end polymer and a specific functional group-modified conjugated diene polymer having a functional group in a side chain to thereby produce a conjugated diene graft polymer; and a step of recovering the conjugated diene graft polymer obtained.
    Type: Application
    Filed: September 18, 2020
    Publication date: September 15, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Yoshikazu UENO, Hiroshi KANBARA, Atsushi INATOMI, Junya TAKAI, Zhaoming MA
  • Patent number: 11124631
    Abstract: Disclosed herein is a rubber composition containing 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound represented by the formula (1), and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying (i) to (iii): (i) a weight average molecular weight (Mw) is not less than 1,000 and less than 15,000; (ii) a vinyl content is not more than 70 mol %; and (iii) an average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: September 21, 2021
    Assignee: KURARAY CO., LTD.
    Inventors: Hiromi Maeda, Daisuke Koda, Hiroshi Kanbara, Satomi Ohta
  • Publication number: 20210246299
    Abstract: The present invention provides a rubber composition having superior moldability, wear resistance, and grip performance, and tires therewith. The present invention relates to a rubber composition comprising: a copolymer (B) constituted of a vinyl alcohol polymer (B-1) region and a diene polymer (B-2) region; and a rubber component (C), wherein the rubber composition comprises 1 to 20 parts by mass of the copolymer (B) relative to 100 parts by mass of the rubber component (C).
    Type: Application
    Filed: June 7, 2019
    Publication date: August 12, 2021
    Applicant: KURARAYCO., LTD.
    Inventors: Yusuke AMANO, Eiichi ISHIDA, Kazuhiko MAEKAWA, Daisuke KODA, Hiroshi KANBARA
  • Patent number: 11034821
    Abstract: A rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound represented by the formula (1), and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying (i) to (iii) below: (i) The weight average molecular weight (Mw) is 15,000 to 120,000. (ii) The vinyl content is not more than 70 mol %. (iii) The average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 30.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: June 15, 2021
    Assignee: KURARAY CO., LTD.
    Inventors: Hiromi Maeda, Daisuke Koda, Hiroshi Kanbara, Satomi Ohta
  • Publication number: 20210017320
    Abstract: The invention provides a modified liquid diene polymer that allows a rubber composition to give a crosslinked product which contains a filler in a dispersed state ideal for attaining enhanced properties and which also exhibits excellent properties such as wet grip and abrasion resistance. The invention also provides a rubber composition including the modified liquid diene polymer, a crosslinked product thereof, and a tire which includes a portion including the composition or the crosslinked product. The modified liquid diene polymer is a product of modification, with a specific silane compound, of a liquid diene block copolymer including a polymer block (b?1) or (b?1) containing butadiene units and a polymer block (b?2) or (b?2). The modified liquid diene polymer has a functional group derived from the silane compound, and satisfies specific conditions.
    Type: Application
    Filed: March 4, 2019
    Publication date: January 21, 2021
    Inventors: Satomi OHTA, Hiroshi KANBARA, Daisuke KODA
  • Publication number: 20200392313
    Abstract: The invention provides a high-grip tire rubber composition satisfying wet grip performance, dry grip performance and steering stability in a high and well-balanced manner, and a tire tread, a bead filler, a tire belt and a pneumatic tire which each partially include the composition. The high-grip tire rubber composition includes 100 parts by mass of a solid rubber (A), the solid rubber (A) including not less than 60 mass % of a styrene butadiene rubber with 20 mass % or more styrene content, 0.1 to 90 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 150 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) to (iii): (i) the weight average molecular weight (Mw) is not less than 1,000 and less than 15,000, (ii) the vinyl content is not more than 70 mol %, and (iii) the average number of the functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20.
    Type: Application
    Filed: August 29, 2018
    Publication date: December 17, 2020
    Applicant: Kuraray Co., Ltd.
    Inventors: Hiroshi KANBARA, Daisuke KODA, Yosuke UEHARA
  • Publication number: 20200332089
    Abstract: The tire rubber composition includes 100 parts by mass of a solid rubber (A) having a glass transition temperature (Tg) of not more than ?10° C., 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) to (iv): (i) the weight average molecular weight (Mw) is 15,000 to 120,000, (ii) the vinyl content is not more than 70 mol %, (iii) the average number of the functional groups per molecule of the modified liquid diene rubber (B) is 1 to 30, and (iv) the glass transition temperature (Tg) is not more than 0° C.
    Type: Application
    Filed: August 29, 2018
    Publication date: October 22, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Hiroshi KANBARA, Daisuke KODA
  • Publication number: 20200332090
    Abstract: The invention provides a heavy-duty tire rubber composition capable of giving heavy-duty tires which exhibit low heat generation properties and have good abrasion resistance, and also provides a tire tread, a bead filler, a tire belt and a heavy-duty tire which each partially include the composition. The heavy-duty tire rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) and (ii): (i) the weight average molecular weight (Mw) is not less than 1,000 and not more than 120,000, and (ii) the vinyl content is less than 30 mol %.
    Type: Application
    Filed: August 29, 2018
    Publication date: October 22, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Daisuke KODA, Hiroshi KANBARA
  • Publication number: 20200254816
    Abstract: The invention provides a heavy-duty tire rubber composition excellent in wet grip performance and steering stability, and a tire tread, a bead filler, a tire belt and a heavy-duty tire which each partially include the composition. The heavy-duty tire rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) and (ii): (i) the weight average molecular weight (Mw) is not less than 1,000 and not more than 120,000, and (ii) the vinyl content is not less than 30 mol % and less than 70 mol %.
    Type: Application
    Filed: August 29, 2018
    Publication date: August 13, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Daisuke KODA, Hiroshi KANBARA
  • Publication number: 20200207957
    Abstract: The invention provides a high-grip tire rubber composition excellent in steering stability, rolling resistance performance and abrasion resistance, and a tire tread, a bead filler, a tire belt and a pneumatic tire which each partially include the composition. The high-grip tire rubber composition includes 100 parts by mass of a solid rubber (A), the solid rubber (A) including not less than 60 mass % of a styrene butadiene rubber with 20 mass % or more styrene content, 0.1 to 90 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound with a specific structure, and 20 to 150 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying the following (i) and (ii): (i) the weight average molecular weight (Mw) is 15,000 to 120,000, and (ii) the vinyl content is not more than 70 mol %.
    Type: Application
    Filed: August 29, 2018
    Publication date: July 2, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Hiroshi KANBARA, Daisuke KODA, Yosuke UEHARA
  • Publication number: 20200207956
    Abstract: The invention provides a tire rubber composition capable of giving crosslinked products having excellent properties including mechanical strength such as abrasion resistance, a crosslinked product of the composition, and a tire tread, a bead filler, a tire belt and a pneumatic tire which each partially include the composition or the crosslinked product and which each exhibit satisfactory dry grip performance plus excellent wet grip performance and ice grip performance and can attain enhanced steering stability. The tire rubber composition includes 100 parts by mass of a solid rubber (A) having a glass transition temperature (Tg) of not more than ?10° C., 0.
    Type: Application
    Filed: August 29, 2018
    Publication date: July 2, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Hiroshi KANBARA, Daisuke KODA
  • Publication number: 20190218376
    Abstract: A rubber composition includes 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound represented by the formula (1), and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying (i) to (iii) below: (i) The weight average molecular weight (Mw) is 15,000 to 120,000. (ii) The vinyl content is not more than 70 mol %. (iii) The average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 30.
    Type: Application
    Filed: September 1, 2017
    Publication date: July 18, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Hiromi MAEDA, Daisuke KODA, Hiroshi KANBARA, Satomi OHTA
  • Publication number: 20190194429
    Abstract: Disclosed herein is a rubber composition containing 100 parts by mass of a solid rubber (A), 0.1 to 50 parts by mass of a modified liquid diene rubber (B) having a functional group derived from a silane compound represented by the formula (1), and 20 to 200 parts by mass of a filler (C), the modified liquid diene rubber (B) satisfying (i) to (iii): (i) a weight average molecular weight (Mw) is not less than 1,000 and less than 15,000; (ii) a vinyl content is not more than 70 mol %; and (iii) an average number of functional groups per molecule of the modified liquid diene rubber (B) is 1 to 20.
    Type: Application
    Filed: September 1, 2017
    Publication date: June 27, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Hiromi MAEDA, Daisuke KODA, Hiroshi KANBARA, Satomi OHTA
  • Patent number: 10227481
    Abstract: The invention relates to a rubber composition having a good processability, and simultaneously having a rolling resistance performance and hardness after vulcanization at high levels, with which the contamination of the mold for processing due to the bleeding-out of the plasticizer can be suppressed, and in which the migration of the plasticizer and so on is suppressed to a low level; a vulcanized rubber obtained by vulcanizing the rubber composition; and to a tire including the rubber composition as at least a part thereof. The rubber composition contains 100 parts by mass of rubber component (A) composed of at least one of a synthetic rubber and a natural rubber, 0.1 to 50 parts by mass of a diene polymer (B), 20 to 150 parts by mass of a filler (C), 0.1 to 10 parts by mass of a vulcanizing agent (D), 0.1 to 15 parts by mass of a vulcanization accelerator (E) and 0.1 to 15 parts by mass of vulcanization aid (F).
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: March 12, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Daisuke Koda, Kei Hirata, Hiroshi Kanbara
  • Publication number: 20170327681
    Abstract: The present invention provides a sealing material composition including 100 parts by mass of a polymer of farnesene (A) and from 1 to 4,000 parts by mass of a filler (B).
    Type: Application
    Filed: October 27, 2015
    Publication date: November 16, 2017
    Applicants: KURARAY CO., LTD., AMYRIS, INC.
    Inventors: Hiroshi KANBARA, Kei HIRATA
  • Patent number: 9650538
    Abstract: A micro-structure is manufactured by patterning a sacrificial film, forming an inorganic material film on the pattern, providing the inorganic material film with an aperture, and etching away the sacrificial film pattern through the aperture to define a space having the contour of the pattern. The patterning stage includes the steps of (A) forming a sacrificial film using a composition comprising a cresol novolac resin and a crosslinker, (B) exposing patternwise the film to first high-energy radiation, (C) developing, and (D) exposing the sacrificial film pattern to second high-energy radiation and heat treating for thereby forming crosslinks within the cresol novolac resin.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: May 16, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hideto Kato, Hiroshi Kanbara, Tomoyoshi Furihata, Yoshinori Hirano
  • Publication number: 20160053097
    Abstract: The invention relates to a rubber composition having a good processability, and simultaneously having a rolling resistance performance and hardness after vulcanization at high levels, with which the contamination of the mold for processing due to the bleeding-out of the plasticizer can be suppressed, and in which the migration of the plasticizer and so on is suppressed to a low level; a vulcanized rubber obtained by vulcanizing the rubber composition; and to a tire including the rubber composition as at least a part thereof. The rubber composition contains 100 parts by mass of rubber component (A) composed of at least one of a synthetic rubber and a natural rubber, 0.1 to 50 parts by mass of a diene polymer (B), 20 to 150 parts by mass of a filler (C), 0.1 to 10 parts by mass of a vulcanizing agent (D), 0.1 to 15 parts by mass of a vulcanization accelerator (E) and 0.1 to 15 parts by mass of vulcanization aid (F).
    Type: Application
    Filed: March 25, 2014
    Publication date: February 25, 2016
    Applicant: KURARAY CO., LTD.
    Inventors: Daisuke KODA, Kei HIRATA, Hiroshi KANBARA
  • Publication number: 20140296380
    Abstract: A micro-structure is manufactured by patterning a sacrificial film, forming an inorganic material film on the pattern, providing the inorganic material film with an aperture, and etching away the sacrificial film pattern through the aperture to define a space having the contour of the pattern. The patterning stage includes the steps of (A) forming a sacrificial film using a composition comprising a cresol novolac resin and a crosslinker, (B) exposing patternwise the film to first high-energy radiation, (C) developing, and (D) exposing the sacrificial film pattern to second high-energy radiation and heat treating for thereby forming crosslinks within the cresol novolac resin.
    Type: Application
    Filed: June 16, 2014
    Publication date: October 2, 2014
    Inventors: Hideto KATO, Hiroshi KANBARA, Tomoyoshi FURIHATA, Yoshinori HIRANO
  • Patent number: 8785114
    Abstract: A micro-structure is manufactured by patterning a sacrificial film, forming an inorganic material film on the pattern, providing the inorganic material film with an aperture, and etching away the sacrificial film pattern through the aperture to define a space having the contour of the pattern. The patterning stage includes the steps of (A) forming a sacrificial film using a composition comprising a cresol novolac resin and a crosslinker, (B) exposing patternwise the film to first high-energy radiation, (C) developing, and (D) exposing the sacrificial film pattern to second high-energy radiation and heat treating for thereby forming crosslinks within the cresol novolac resin.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: July 22, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hideto Kato, Hiroshi Kanbara, Tomoyoshi Furihata, Yoshinori Hirano
  • Publication number: 20110305990
    Abstract: A micro-structure is manufactured by patterning a sacrificial film, forming an inorganic material film on the pattern, providing the inorganic material film with an aperture, and etching away the sacrificial film pattern through the aperture to define a space having the contour of the pattern. The patterning stage includes the steps of (A) forming a sacrificial film using a composition comprising a cresol novolac resin and a crosslinker, (B) exposing patternwise the film to first high-energy radiation, (C) developing, and (D) exposing the sacrificial film pattern to second high-energy radiation and heat treating for thereby forming crosslinks within the cresol novolac resin.
    Type: Application
    Filed: June 10, 2011
    Publication date: December 15, 2011
    Inventors: Hideto KATO, Hiroshi Kanbara, Tomoyoshi Furihata, Yoshinori Hirano