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    MICROBALLOON PRODUCTION METHOD
    2.
    发明申请
    MICROBALLOON PRODUCTION METHOD 有权

    公开(公告)号：US20220387956A1

    公开(公告)日：2022-12-08

    申请号：US17765655

    申请日：2020-09-23

    Applicant: TOKUYAMA CORPORATION

    Inventor： Yasutomo SHIMIZU ,  Takayoshi KAWASAKI

    IPC: B01J13/16 ,  C08G18/73 ,  C08G18/32

    Abstract: A method for producing microballoons consisting of a polyurethane (urea) produced by an interfacial polyaddition reaction method with a W/O emulsion and having excellent dispersibility is provided. Specifically, a method for producing microballoons, characterized by forming a microballoon dispersion liquid consisting of a polyurethane (urea) by an interfacial polyaddition reaction method with a W/O emulsion and then treating the dispersion liquid with a solution containing a monofunctional active hydrogen compound containing only one active hydrogen group selected from an amino group and a hydroxyl group is provided.

    HOLLOW MICROBALLOON
    4.
    发明公开
    HOLLOW MICROBALLOON 审中-公开

    公开(公告)号：US20240101751A1

    公开(公告)日：2024-03-28

    申请号：US18274188

    申请日：2022-01-27

    Applicant: TOKUYAMA CORPORATION

    Inventor： Yasutomo SHIMIZU ,  Kazuishi FUKUDA ,  Takayoshi KAWASAKI

    IPC: C08G18/48 ,  B24B37/24 ,  C08G18/76 ,  C08L29/04

    CPC classification number: C08G18/4883 ,  B24B37/24 ,  C08G18/7621 ,  C08L29/04

    Abstract: The hollow microballoon of the invention includes a resin produced by polymerizing a polymerizing composition that contains a cyclic molecule having at least three side chains with a polymerizable functional group introduced into the terminal thereof and a polymerizable monomer other than the cyclic molecule having at least three side chains with a polymerizable functional group introduced into the terminal thereof. According to the invention, there are provided hollow microballoon capable of imparting not only polishing characteristics but also excellent durability to a CMP polishing pad using the hollow microballoon.

    URETHANE RESIN COMPRISING A POLYROTAXANE AND POLISHING PAD
    7.
    发明申请
    URETHANE RESIN COMPRISING A POLYROTAXANE AND POLISHING PAD 审中-公开

    公开(公告)号：US20190263961A1

    公开(公告)日：2019-08-29

    申请号：US16344599

    申请日：2017-11-16

    Applicant: TOKUYAMA CORPORATION

    Inventor： Yasutomo SHIMIZU ,  Takayoshi KAWASAKI ,  Junji MOMODA ,  Mitsuki TOCHI

    IPC: C08G18/64 ,  C08G83/00 ,  C08G18/76 ,  C08G18/10 ,  C08G18/32

    Abstract: To provide a urethane resin for sliding members which has high abrasion resistance and is considered that crosslinking points are uniformly dispersed so that molecular motion is suitably possible. Particularly, to provide the urethane resin can be advantageously used as a polishing pad.There is provided the urethane resin for polishing is obtained by polymerizing a polymerizable composition comprising (A) a polyrotaxane having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule and side chains having an active hydrogen group introduced into at least some of the cyclic molecules and (B) a polyiso(thio)cyanate compound.

    IONIC-GROUP-CONTAINING MICROBALLOON AND PRODUCTION METHOD THEREFOR
    8.
    发明申请
    IONIC-GROUP-CONTAINING MICROBALLOON AND PRODUCTION METHOD THEREFOR 有权

    公开(公告)号：US20230028836A1

    公开(公告)日：2023-01-26

    申请号：US17783155

    申请日：2020-12-10

    Applicant: TOKUYAMA CORPORATION

    Inventor： Yasutomo SHIMIZU ,  Takayoshi KAWASAKI

    IPC: B01J13/16 ,  B24B37/24 ,  C08G18/08

    Abstract: The present invention relates to a microballoon. The microballoon is made of polyurethane (urea). The microballoon is characterized in that an inner surface of the microballoon contains ionic groups. According to the present invention, through use for a CMP polishing pad, affinity with a slurry liquid for polishing is improved, and thus it is possible to provide a microballoon by which good polishing characteristics may be exhibited without lowering the resin strength of a polishing pad.

    URETHANE RESIN USING POLYROTAXANE, AND PAD FOR POLISHING
    10.
    发明申请
    URETHANE RESIN USING POLYROTAXANE, AND PAD FOR POLISHING 有权

    公开(公告)号：US20210155736A1

    公开(公告)日：2021-05-27

    申请号：US17045553

    申请日：2019-04-08

    Applicant: TOKUYAMA CORPORATION

    Inventor： Yasutomo SHIMIZU ,  Takayoshi KAWASAKI ,  Mitsuki TOCHI

    IPC: C08G18/10 ,  C08G18/64 ,  C08G83/00 ,  C08K7/22 ,  C08L75/04 ,  C08L87/00 ,  B24B37/24

    Abstract: The present invention relates to a urethane resin obtained by reacting a polymerizable composition containing at least a urethane prepolymer (B2) having an iso(thio)cyanate group at an end of a molecule thereof, which is obtained by reacting a bifunctional active hydrogen-containing compound (C1) having two groups having active hydrogen in a molecule thereof and a bifunctional iso(thio)cyanate group-containing compound (B1) having two iso(thio)cyanate groups in a molecule thereof, a polyrotaxane (A) having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, in which side chains having a group having active hydrogen are introduced into at least a part of the cyclic molecules, and a polyfunctional active hydrogen-containing compound (C2) other than the polyrotaxane (A) and having three or more groups having active hydrogen in a molecule thereof. In accordance with the present invention, it is possible to provide a urethane resin for a sliding member with high abrasion resistance and capable of being suitably used as a polishing pad.

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