Patents by Inventor Toshifumi NOSAKI

Toshifumi NOSAKI 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 BLOCK COPOLYMER
    Publication number: 20230399451
    Abstract: A method for producing a block copolymer that includes a step (A) of polymerizing a vinyl aromatic monomer at ?5° C. to 35° C. in a mixed solvent including at least one nonpolar solvent selected from methylcyclohexane and methylcyclopentane and an aprotic polar solvent using an anionic polymerization initiator; a step (B) of adding a conjugated diene monomer for further polymerization at ?5° C. to 35° C. after the step (A); and a step (C) of adding a vinyl aromatic monomer for further polymerization at ?5° C. to 35° C. after the step (B) if necessary.
    Type: Application
    Filed: October 29, 2021
    Publication date: December 14, 2023
    Applicant: NIPPON SODA CO., LTD.
    Inventors: Shota OSUMI, Toshifumi NOSAKI, Masahiro UMEZAWA