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    • 45. 发明授权
    • Water-based ballpoint pen
    • 水性圆珠笔
    • US08511926B2
    • 2013-08-20
    • US12922794
    • 2009-03-17
    • Nobuyuki KitaokaHisashi NakamuraItsuka Goshima
    • Nobuyuki KitaokaHisashi NakamuraItsuka Goshima
    • B43K7/10C09D11/00
    • B43K1/082C09D11/18
    • A water-based ballpoint pen using a cemented carbide ball comprising tungsten carbide and a metal binder as a writing front end, wherein cobalt and/or nickel are contained in the cemented carbide ball as the metal binder in an amount of 1 to 20% by weight based on the total amount of the ball and which further includes an aqueous ink composition containing a colorant, water, a phosphate ester-based surfactant, and any one or more compounds of a thiadiazole represented by formula (1), 5-mercapto-3-phenyl-1,3,4-thiadiazole-2-thione or a salt thereof, and an oligomer of 2,5-dimercapto-1,3,4-thiadiazole: wherein X and Y each represents any substituent of CH3, NH2, and SM, and M represents any of hydrogen, an alkali metal, an ammonium, and an alkanolamine.
    • 一种水性圆珠笔,其使用包含碳化钨和金属粘合剂的硬质合金球作为书写前端,其中钴和/或镍作为金属粘合剂包含在作为金属粘合剂的硬质合金球中,其量为1〜20% 重量为基于球的总量,并且还包括含有着色剂,水,磷酸酯类表面活性剂和由式(1)表示的噻二唑的任何一种或多种化合物的含水油墨组合物,5-巯基 - 3-苯基-1,3,4-噻二唑-2-硫酮或其盐和2,5-二巯基-1,3,4-噻二唑的低聚物:其中X和Y各自表示CH 3,NH 2的任何取代基 和SM,M表示氢,碱金属,铵和链烷醇胺中的任一种。