Patents by Inventor Daisuke YOSHII

Daisuke YOSHII 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).

  • Method for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, polymer composition, crosslinked body, tire and compound
    Patent number: 10894876
    Abstract: A modified conjugated diene-based polymer having high Mooney viscosity and good shape stability and exhibiting excellent processability and low heat build-up is obtained in as few steps as possible. The modified conjugated diene-based polymer is produced by a method of reacting a conjugated diene-based polymer having an active chain end, obtained by polymerizing a monomer containing a conjugated diene compound in the presence of an initiator that contains at least either of an alkali metal compound and an alkaline earth metal compound, with a compound [M] having at least two groups selected from the group consisting of a group “—C(R1)?N-A1” and a group “—N?C(R1)-A1”, where R1 is a hydrogen atom or a hydrocarbyl group and A1 is a monovalent group having an alkoxysilyl group.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: January 19, 2021
    Assignee: JSR CORPORATION
    Inventors: Kazuya Morishita, Mitsunori Inoue, Daisuke Yoshii, Yusuke Amano
  • METHOD FOR PRODUCING MODIFIED CONJUGATED DIENE-BASED POLYMER, MODIFIED CONJUGATED DIENE-BASED POLYMER, POLYMER COMPOSITION, CROSSLINKED BODY, TIRE AND COMPOUND
    Publication number: 20190194430
    Abstract: A modified conjugated diene-based polymer having high Mooney viscosity and good shape stability and exhibiting excellent processability and low heat build-up is obtained in as few steps as possible. The modified conjugated diene-based polymer is produced by a method of reacting a conjugated diene-based polymer having an active chain end, obtained by polymerizing a monomer containing a conjugated diene compound in the presence of an initiator that contains at least either of an alkali metal compound and an alkaline earth metal compound, with a compound [M] having at least two groups selected from the group consisting of a group “—C(R1)N-A1” and a group “—N?C(R1)-A1”, where R1 is a hydrogen atom or a hydrocarbyl group and A1 is a monovalent group having an alkoxysilyl group.
    Type: Application
    Filed: June 20, 2017
    Publication date: June 27, 2019
    Applicant: JSR CORPORATION
    Inventors: Kazuya MORISHITA, Mitsunori INOUE, Daisuke YOSHII, Yusuke AMANO