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    COATING COMPOSITIONS AND PROCESS FOR THE PRODUCTION OF MULTILAYER COATINGS
    1.
    发明授权
    COATING COMPOSITIONS AND PROCESS FOR THE PRODUCTION OF MULTILAYER COATINGS 有权
    涂料组合物及其制造方法多层涂层

    公开(公告)号：EP1817386B1

    公开(公告)日：2010-01-13

    申请号：EP05803025.5

    申请日：2005-09-29

    申请人： E.I. DU PONT DE NEMOURS AND COMPANY

    发明人： BECKER, Wiebke ,  DUECOFFRE, Volker ,  FLOSBACH, Carmen ,  KLEUSER, Brigit

    IPC分类号： C09D175/04 ,  C08G18/40

    CPC分类号： C09D175/04 ,  C08G18/4063 ,  C08G2270/00

    摘要： An aqueous coating composition, comprising A) at least one water-dilutable hydroxy-functional binder and B) at least one polyisocyanate crosslinking agent with free isocyanate groups, wherein component A) comprises A1) 40-95 wt.% of at least one water-dilutable hydroxy-functional (meth)acrylic copolymer with a hydroxyl value of 60-250 mg of KOH/g and an acid value of 5-50 mg of KOH/g, which is obtained by free-radical copolymerization performed in a non-aqueous phase, wherein the ratio of primary hydroxyl groups to secondary hydroxyl groups in the (meth)acrylate copolymer A1) is 1: 0.1 to 1 :1.2 and at least 80% of the secondary hydroxyl groups result from reaction products of a monoepoxy ester and an unsaturated acid-functional monomer, and A2) 5-60 wt.% of at least one water-dilutable polyester oligomer, wherein the total of the weight percentages of component A1) and A2) add up to 100 wt.% and wherein the free-radical polymerization for the production of component A1) is performed at least in part in the presence of component A2) and/or wherein component A2) is added during polymerization or after completion of polymerization.