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    Waterborne coating composition
    14.
    发明授权
    Waterborne coating composition 有权

    公开(公告)号：US10597553B2

    公开(公告)日：2020-03-24

    申请号：US14004423

    申请日：2012-03-26

    Applicant: Jaap Michiel Akkerman ,  Dirk Emiel Paula Mestach ,  Wincerty Lambertus Stanislaw Pilaszek ,  Rob Adolphs

    Inventor： Jaap Michiel Akkerman ,  Dirk Emiel Paula Mestach ,  Wincerty Lambertus Stanislaw Pilaszek ,  Rob Adolphs

    IPC: C09D133/12 ,  C08F220/18 ,  C08F220/28 ,  C08F283/02 ,  C08G18/08 ,  C08G18/34 ,  C08G18/62 ,  C08G18/69 ,  C08G18/75 ,  C09D133/14 ,  C09D151/08 ,  C09D175/14 ,  C08F283/00

    Abstract: The invention relates to an aqueous dispersion for use as open time improver in a coating composition which aqueous polymer dispersion comprises a first polymer having a number average molecular weight (Mn) of from 2,000 to 120,000 (determined by gel permeation chromatography using a mixture of tetrahydrofurane and acetic acid as eluent), an acid value of from 30 to 150 mg KOH/g, and an ethylene-oxide wt % (on total solid polymer) of from 1 to 20 wt %, said first polymer dispersion being obtainable by free radical polymerization of a monomer mixture in the presence of at least one free-radical initiator and at least one surfactant, said monomer mixture comprising: a) 5 to 20 wt %, preferably 7 to 10 wt %, acid functional ethylenically unsaturated monomers or precursors thereof or ethylenically unsaturated monomers comprising ionic group precursors; b) 5 to 25 wt %, preferably 7 to 20 wt %, ethylenically unsaturated monomers containing polyethylene oxide, polyethylene glycol or mono-alkoxypolyethylene glycol moeity c) up to 90 wt % of non-ionic ethylenically unsaturated monomers other than a) or b); d) 0 to 10 wt % ethylenically unsaturated monomers with a functional group for cross-linking e) 0 to 10 wt % of chain transfer agents; f) up to 90 wt % non-ionic ethylenically unsaturated monomers other than c), wherein 30 to 90 wt %, more preferably 60 to 80 wt % comprise crosslinkable groups or precursors thereof; wherein the sum of a) through f) is 100 wt %. The invention further relates to a method for making the first polymer dispersion, the use of said aqueous dispersion as an open time improver in a coating composition, to aqueous coating compositions comprising a blend of at least a first aqueous polymer dispersion and a second aqueous polymer dispersion comprising a film-forming second polymer and to a method for making said coating composition.

    POWDER COATING AND CRYSTALLINE DONOR AND/OR ACCEPTOR
    18.
    发明公开
    POWDER COATING AND CRYSTALLINE DONOR AND/OR ACCEPTOR 审中-公开

    公开(公告)号：US20240294799A1

    公开(公告)日：2024-09-05

    申请号：US18569754

    申请日：2022-07-05

    Applicant: Allnex Netherlands B.V.

    Inventor： Richard Hendrikus Gerrit BRINKHUIS ,  Pengcheng YANG

    IPC: C09D175/14 ,  C08G18/24 ,  C08G18/28 ,  C08G18/32 ,  C08G18/34 ,  C08G18/73 ,  C09D5/03

    CPC classification number: C09D175/14 ,  C08G18/246 ,  C08G18/282 ,  C08G18/3206 ,  C08G18/341 ,  C08G18/73 ,  C09D5/03 ,  C08G2150/20

    Abstract: The invention is related to a powder coating composition comprising a crosslinkable composition and a catalyst system, wherein the crosslinkable composition is formed by a crosslinkable donor component A and a crosslinkable acceptor component B that are crosslinkable by a Real Michael Addition (RMA) wherein at least part of the crosslinkable donor component A and/or a crosslinkable acceptor component B are (semi) crystalline and comprise a polyurethane backbone formed by reacting a polyisocyanate, which is substantially hexamethylene diisocyanate (HDI), with a compound (i) which is more preferably a diol; and a compound (iia) comprising at least one, preferably 1, isocyanate reactive groups, preferably a hydroxyl and at least one functional group having at least one acidic C—H donor group in activated methylene or methine, a compound (iib) comprising at least one, preferably (1), isocyanate reactive groups, preferably a hydroxyl and at least one functional group having at least one activated unsaturated acceptor groups C═C, to form the (semi) crystalline acceptor component B.

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