Patents by Inventor Aya SAIKI

Aya SAIKI 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: 20190177513
    Abstract: Provided is a rubber composition comprising: a rubber component containing diene-based rubber; a filler, and a compound represented by formula (I) below: (wherein: A is an aryl group and has at least two polar groups, which may be the same or different from each other; R1 and R2 are each independently at least one substituent selected from a group consisting of a hydrogen atom, an acyl group, an amide group, an alkyl group, a cycloalkyl group, and an aryl group; and further, the substituent may include one or more of O, S, and N atoms), so as to provide a rubber composition excellent in low heat generating property and wear resistance.
    Type: Application
    Filed: August 3, 2017
    Publication date: June 13, 2019
    Applicants: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.
    Inventors: Satoshi HAMATANI, Aya SAIKI, Shinya SHINOZAKI, Mifuyu UENO, Masaki ABE
  • Publication number: 20190144638
    Abstract: In the phenolic resin to be blended with rubber of the present invention, when the total peak area in a chemical shift measured by 13C-NMR of 110 ppm or more and 160 ppm or less is taken as 100, the total peak area in 0 ppm or more and less than 60 ppm is 80 to 400 and the total peak area in 60 ppm or more and less than 110 ppm is 2 to 70.
    Type: Application
    Filed: April 4, 2017
    Publication date: May 16, 2019
    Applicants: BRIDGESTONE CORPORATION, SUMITOMO BAKELITE CO., LTD.
    Inventors: Shigeaki MATSUO, Aya SAIKI, Yuichi SASAHARA, Takao KUNIMI
  • Patent number: 10087292
    Abstract: Provided is a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a monohydrazide compound (C) supported on a solid. The monohydrazide compound (C) is represented by general formula (I): R—CONHNH2, where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group. The method comprises compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the monohydrazide compound (C) supported on the solid and kneading in the preliminary compounding stage and/or a first compounding stage. Also provided is a rubber composition produced with this method.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: October 2, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Aya Saiki, Toshihiro Uchiyama
  • Patent number: 10066080
    Abstract: Provided is a rubber composition that contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisanilino compound represented by formula (I). In formula (I), R1 and R2 each represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of 1-6, m and n each represent an integer of 0 or 1, A1 represents an alkylene group having a carbon number of 1-7, A2 represents an alkylene group having a carbon number of 1-8, X1 represents an oxygen atom, a sulfur atom, or an —NR3— group, and X2 represents an oxygen atom, a sulfur atom, or an —NR4— group, where R3 and R4 each represent a hydrogen atom or an alkyl group having a carbon number of 1-4, or collectively form an alkylene group having a carbon number of 1-4.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: September 4, 2018
    Assignee: OTSUKA CHEMICAL CO., LTD.
    Inventors: Aya Saiki, Hidehiro Minashima, Yuzaburo Yano, Noriaki Shiina, Kazuhiro Kodama, Mifuyu Ueno, Takashi Sato, Shinya Nakashima, Masaki Abe
  • Patent number: 10059829
    Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit surface discoloration of a rubber article. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one amine compound represented by formula (I) shown below. In formula (I), R1 and R2 each represent, independently of one another, an alkyl group having a carbon number of 1-10, an aralkyl group, or a phenyl group, and A represents an alkylene group having a carbon number of 6-30 that may include an interposed phenylene group.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: August 28, 2018
    Assignee: OTSUKA CHEMICAL CO., LTD.
    Inventors: Aya Saiki, Hidehiro Minashima, Yuzaburo Yano, Noriaki Shiina, Kazuhiro Kodama, Mifuyu Ueno, Takashi Sato, Shinya Nakashima, Masaki Abe
  • Patent number: 10011704
    Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R1, R2, R5, and R6 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R1 and R2 do not both simultaneously represent a hydrogen atom and R5 and R6 do not both simultaneously represent a hydrogen atom, R3 and R4 each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: July 3, 2018
    Assignee: OTSUKA CHEMICAL CO., LTD.
    Inventors: Aya Saiki, Hidehiro Minashima, Yuzaburo Yano, Noriaki Shiina, Kazuhiro Kodama, Mifuyu Ueno, Takashi Sato, Shinya Nakashima, Masaki Abe
  • Publication number: 20170267818
    Abstract: Provided is a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a monohydrazide compound (C) supported on a solid. The monohydrazide compound (C) is represented by general formula (I): R—CONHNH2, where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group. The method comprises compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the monohydrazide compound (C) supported on the solid and kneading in the preliminary compounding stage and/or a first compounding stage. Also provided is a rubber composition produced with this method.
    Type: Application
    Filed: September 11, 2015
    Publication date: September 21, 2017
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Aya SAIKI, Toshihiro UCHIYAMA
  • Publication number: 20170166727
    Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit surface discoloration of a rubber article. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one amine compound represented by formula (I) shown below. In formula (I), R1 and R2 each represent, independently of one another, an alkyl group having a carbon number of 1-10, an aralkyl group, or a phenyl group, and A represents an alkylene group having a carbon number of 6-30 that may include an interposed phenylene group.
    Type: Application
    Filed: May 22, 2015
    Publication date: June 15, 2017
    Applicant: OTSUKA CHEMICAL CO., LTD.
    Inventors: Aya SAIKI, Hidehiro MINASHIMA, Yuzaburo YANO, Noriaki SHIINA, Kazuhiro KODAMA, Mifuyu UENO, Takashi SATO, Shinya NAKASHIMA, Masaki ABE
  • Publication number: 20170166728
    Abstract: Provided is a rubber composition that contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisanilino compound represented by formula (I). In formula (I), R1 and R2 each represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of 1-6, m and n each represent an integer of 0 or 1, A1 represents an alkylene group having a carbon number of 1-7, A2 represents an alkylene group having a carbon number of 1-8, X1 represents an oxygen atom, a sulfur atom, or an —NR3— group, and X2 represents an oxygen atom, a sulfur atom, or an —NR4— group, where R3 and R4 each represent a hydrogen atom or an alkyl group having a carbon number of 1-4, or collectively form an alkylene group having a carbon number of 1-4.
    Type: Application
    Filed: May 22, 2015
    Publication date: June 15, 2017
    Applicant: OTSUKA CHEMICAL CO., LTD.
    Inventors: Aya SAIKI, Hidehiro MINASHIMA, Yuzaburo YANO, Noriaki SHIINA, Kazuhiro KODAMA, Mifuyu UENO, Takashi SATO, Shinya NAKASHIMA, Masaki ABE
  • Patent number: 9670336
    Abstract: We provide a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a hydrazide compound (C), the method comprising compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the hydrazide compound (C) and kneading in the preliminary compounding stage and/or a first compounding stage, the hydrazide compound (C) being represented by general formula (I): R—CONHNH2, where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group. We also provide a rubber composition produced with this method.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: June 6, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Aya Saiki, Haruki Minojima
  • Publication number: 20170137604
    Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R1, R2, R5, and R6 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R1 and R2 do not both simultaneously represent a hydrogen atom and R5 and R6 do not both simultaneously represent a hydrogen atom, R3 and R4 each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.
    Type: Application
    Filed: May 22, 2015
    Publication date: May 18, 2017
    Applicant: OTSUKA CHEMICAL CO., LTD.
    Inventors: Aya SAIKI, Hidehiro MINASHIMA, Yuzaburo YANO, Noriaki SHIINA, Kazuhiro KODAMA, Mifuyu UENO, Takashi SATO, Shinya NAKASHIMA, Masaki ABE
  • Publication number: 20160017121
    Abstract: We provide a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a hydrazide compound (C), the method comprising compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the hydrazide compound (C) and kneading in the preliminary compounding stage and/or a first compounding stage, the hydrazide compound (C) being represented by general formula (I): R—CONHNH2, where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group. We also provide a rubber composition produced with this method.
    Type: Application
    Filed: March 24, 2014
    Publication date: January 21, 2016
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Aya SAIKI, Haruki MINOJIMA