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    • 19. 发明授权
    • Graft copolymer with a urethane/urea group as a pigment dispersant
    • 具有氨基甲酸酯/脲基的接枝共聚物作为颜料分散剂
    • US06852803B2
    • 2005-02-08
    • US10162186
    • 2002-06-03
    • Sheau-Hwa Ma
    • Sheau-Hwa Ma
    • B01F17/52C08F265/04C08F290/04C08F290/06C08F291/00C08G18/62C08L51/00C09D17/00C09D151/00C09D155/00C09D201/00C08F291/12
    • C08L51/003C08F265/04C08F290/06C08F291/00C09D151/003C08L2666/02
    • A polymer dispersant for pigments based on a graft copolymer which contains a new type of urea functional group as the pigment anchoring group. The urea groups are attached to the graft copolymer by a convenient method which involves reaction of hydroxyl functional groups built in the graft copolymer with a diisocyanate that is capped at one end with ammonia or a primary or secondary amine. The reaction is convenient and clean. Substantial crosslinking or gelling of the polymer can be easily avoided by judicious selection of appropriate ingredients and processing conditions. These materials are effective in dispersing and stabilizing a wide range of pigments in solvent based systems and are particularly useful in forming pigment dispersions that are used in a variety of solvent borne coating compositions for automobiles and trucks, where they provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent.
    • 一种基于含有新型尿素官能团作为颜料锚定基团的接枝共聚物的颜料聚合物分散剂。 尿素基团通过方便的方法附着于接枝共聚物,该方法包括将接枝共聚物中内置的羟基官能团与一端用氨或伯或仲胺封端的二异氰酸酯进行反应。 反应方便,干净。 通过合理选择适当的成分和加工条件,可以容易地避免聚合物的显着交联或凝胶化。 这些材料在分散和稳定溶剂基系统中的广泛颜料方面是有效的,并且特别可用于形成用于汽车和卡车的各种溶剂型涂料组合物中的颜料分散体,其中它们提供改善的颜料使用效率, 降低油漆粘度,减少挥发性有机溶剂的排放。
    • 20. 发明授权
    • Graft copolymer with an amide functional group as a pigment dispersant
    • 具有酰胺官能团的接枝共聚物作为颜料分散剂
    • US06495618B1
    • 2002-12-17
    • US09466259
    • 1999-12-17
    • Sheau-Hwa Ma
    • Sheau-Hwa Ma
    • C08F27102
    • C08F265/10B01F17/005C08F271/00C08F271/02C08L51/003C09B67/0085C09D17/002Y02P20/582
    • A polymer dispersant for pigments based on a graft copolymer wherein the graft copolymer has a weight average molecular weight of at least 3000 and has 10 to 90% by weight of a polymeric backbone and 90 to 10% by weight of macromonomer side chains attached to the backbone and wherein at least 20% by weight of the polymeric backbone has attached thereto an amide group which serves as a pigment anchoring group. The backbone may also have attached thereto an additional pigment anchoring group selected from the group consisting of aromatic ester, aromatic amine, aliphatic amine, and quaternary ammonium groups, or mixtures thereof. These materials disperse a wide variety of pigments and are useful in solvent borne coatings where they can provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent.
    • 用于基于接枝共聚物的颜料的聚合物分散剂,其中所述接枝共聚物的重均分子量为至少3000并且具有10至90重量%的聚合物主链和90至10重量%的连接到所述聚合物主链的大分子单体侧链 骨架,其中至少20重量%的聚合物主链已连接有用作颜料锚定基团的酰胺基团。 骨架还可以附着有选自芳族酯,芳族胺,脂族胺和季铵基团的其它颜料锚定基团,或其混合物。 这些材料分散了各种各样的颜料,并且可用于溶剂型涂料,其中它们可以提供改善的颜料使用效率,降低涂料粘度和减少挥发性有机溶剂的排放。