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    • 8. 发明授权
    • Water-based pigment dispersion, use thereof and process for the production thereof
    • 水性颜料分散体及其制造方法及其制造方法
    • US06648954B2
    • 2003-11-18
    • US09797827
    • 2001-03-05
    • Toshiyuki UemuraJun KanedaEriko SuzukiTakashi NegishiSeiji Aida
    • Toshiyuki UemuraJun KanedaEriko SuzukiTakashi NegishiSeiji Aida
    • C09D1100
    • C09D11/322C09B67/0034
    • A water-based pigment dispersion comprising 100 parts by weight of a pigment, 3 to 30 parts by weight of a sulfonic acid group-containing pigment derivative and water, wherein the sulfonic acid group-containing pigment derivative has only one sulfonic acid group in a molecule of a pigment of which the type is the same as the type of the pigment to be dispersed, the sulfonic acid group forms at least one salt selected from the group consisting of ammonia salt, an organic amine salt and a salt in which at least 15% of the sulfonic acid group is liberated and the rest is a salt with monovalent metal, the content of metal ion having a valence of at least 2 in a solid matter of the above water-based pigment dispersion is 500 ppm or less, and the above pigment is dispersed in water according to electrostatic repulsion due to the sulfonic acid group-containing pigment derivative adsorbed on the particle surface of the pigment, an inkjet recording liquid containing the same and process for the production thereof.
    • 一种水性颜料分散体,其包含100重量份的颜料,3〜30重量份的含磺酸基的颜料衍生物和水,其中所述含磺酸基的颜料衍生物在 颜料的分子类型与待分散的颜料的类型相同,磺酸基形成至少一种选自氨盐,有机胺盐和盐的盐,其中至少 磺酸基的15%被释放,其余的是与一价金属的盐,在上述水性颜料分散体的固体物质中,化合价至少为2的金属离子的含量为500ppm以下, 由于吸附在颜料的颗粒表面上的含有磺酸基的颜料衍生物,含有该颜料的喷墨记录液,由于静电排斥,上述颜料分散在水中, 生产。