Method for manufacturing polymer
    2.
    发明授权

    公开(公告)号:US11859028B2

    公开(公告)日:2024-01-02

    申请号:US17733542

    申请日:2022-04-29

    发明人: Tadashi Teranishi

    摘要: Object: To provide a method for manufacturing a polymer, which is a method for forming a polymer having a homogeneous copolymer composition and a narrow molecular weight distribution.
    Resolution Means: A method for manufacturing a polymer using a microreactor including a flow path capable of mixing a plurality of liquids to perform radical polymerization of a monomer component containing two or more types of monomers in the presence of a polymerization initiator; wherein the microreactor includes a first inlet port configured to feed the monomer component and an additional inlet port located downstream of the first inlet port; and the method includes feeding the monomer component through the first inlet port and the additional inlet port.

    COATING COMPOSITION WITH IMPROVED BLOCK AND HUMIDITY RESISTANCE, DIRECT TO METAL ADHERENCE AND LOW VOC CONTENT

    公开(公告)号:US20230312972A1

    公开(公告)日:2023-10-05

    申请号:US18022766

    申请日:2021-08-26

    申请人: Arkema Inc.

    摘要: Multi-stage polymeric particles are prepared as a water-borne emulsion, including a first-formed lower Tg soft stage and a second-formed higher Tg hard stage. The polymeric particles include, in both stages: one or more free radical polymerizable ethylenically unsaturated monomers; 0 to 3 wt % of free radical polymerizable surfactant monomer; 0 to 4 wt % of free radical poly-merizable monomer having a beta dicarbonyl functionality; 0 to 2 wt % of monomer selected from acrylamide, diacetone acrylamide, 2-hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylates, and hydroxybutyl (meth)acrylates and mixtures thereof; 0-1.9 wt % of free radical polymerizable polyethylenically unsaturated monomers; 0.1 to 1.9% of free radical polymerizable monomer containing phosphorus acid or a salt thereof in the first stage, and 0.1 to 5 wt % of a free radical polymerizable monomer containing phosphorus acid or salt thereof in the second stage. Multi-stage polymeric-particle-based-resin is formulated into direct to metal coatings, having good block, corrosion and excellent humidity resistance.

    AQUEOUS POLYMER DISPERSION AND PREPARATION METHOD THEREOF

    公开(公告)号:US20210155721A1

    公开(公告)日:2021-05-27

    申请号:US16305502

    申请日:2017-05-24

    申请人: BASF SE

    摘要: The present invention relates to an aqueous polymer dispersion containing a multistage emulsion polymer particle. The multistage emulsion polymer particle contains a polysiloxane formed in the first stage; a transition layer formed in the second stage; and a polyacrylate formed in the third stage. The transition layer is made of silane coupling agents. The present invention also relates to a method of preparing the aqueous polymer dispersion and use of the aqueous polymer dispersion for preparing coatings.