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    A TRANSPARENT PUD AND ITS APPLICATION
    2.
    发明公开
    A TRANSPARENT PUD AND ITS APPLICATION 审中-公开

    公开(公告)号：EP4435029A1

    公开(公告)日：2024-09-25

    申请号：EP23163907.1

    申请日：2023-03-24

    申请人： Covestro Deutschland AG

    发明人： ZHU, Yingdan ,  WEIKARD, Jan ,  HU, Yi ,  ZHU, Deyong ,  XU, Fei

    IPC分类号： C08G18/08 ,  C08G18/10 ,  C08G18/28 ,  C08G18/32 ,  C08G18/34 ,  C08G18/42 ,  C08G18/44 ,  C08G18/66 ,  C08G18/72 ,  C08G18/73 ,  C08G18/75 ,  C09D175/06

    CPC分类号： C09D175/06 ,  C08G18/755 ,  C08G18/0866 ,  C08G18/0823 ,  C08G18/283 ,  C08G18/10 ,  C08G18/3206 ,  C08G18/44 ,  C08G18/6659 ,  C08G18/4238 ,  C08G18/348 ,  C08G18/722 ,  C08G18/73 ,  C08G18/758

    摘要： The present invention relates an aqueous dispersion comprising at least one polyurethane, wherein the at least one polyurethane is prepared from at least the following components (A) at least one polyisocyanate, (B) at least one polymeric polyol having a number average molecular weight of 400 to 6000 g/mol, wherein at least one polycarbonate polyol is present in the polymeric polyol component (B) in an amount of 55 to 100% by weight, based on total weight of component (B), (C) optionally at least one monofunctional nonionic hydrophilizing agent, (D) at least one compound selected from the group consisting of polyols, aminopolyols, polyamines and mixtures thereof, in each case having a number average molecular weight of less than 400 g/mol, (E) at least one compound selected from the group consisting of monools, diols, polyols, monoamines, diamines, polyamines and mixtures thereof, in each case having at least one salt group, preferably an anionic group, or a functional group that can be converted into a salt group, preferably into a anionic group, (F) at least a neutralizer selected from the group consisting of tertiary amine compounds with boiling point above 100 °C at atmospheric pressure, inorganic alkali, preferably potassium hydroxide, sodium hydroxide, and mixtures thereof, wherein the at least one polyurethane dispersion has an average particle diameter D(i)90 of less than or equal to 100 nm, to a coating formulation comprising such an aqueous dispersion, to the use of this aqueous dispersion in a coating formulation, to the process for the coating of a substrate, wherein a coating formulation comprising such an aqueous dispersion used, to the use of such a coating formulation for coating of a substrate and to a substrate coated with the coating formulation.