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    • 29. 发明授权
    • Method for improving erasability or erasable marking compositions
    • 改善可擦除性或可擦除标记组合物的方法
    • US5447560A
    • 1995-09-05
    • US206303
    • 1994-03-03
    • Martin Vogel
    • Martin Vogel
    • C09D13/00C09D11/16C08F265/00
    • C09D11/16
    • A method is disclosed for improving the erasability of erasable marking compositions, while maintaining the opacity of the coating and without producing burnishing, by incorporating into the compositions voided latex particles having a shell polymerized from either:(1) at least about 25% by weight, based on the weight of the shell, of a crosslinking comonomer;(2) at least about 5% by weight, based on the weight of the shell, of a crosslinking comonomer, when at least about 50% by weight of methyl methacrylate is used as a comonomer in the shell.An improved liquid marking composition is also disclosed.
    • 公开了一种用于改善可擦除标记组合物的可擦除性的方法,同时保持涂层的不透明度并且不产生抛光,通过将具有由以下物质聚合的壳体的无孔胶乳颗粒加入:(1)至少约25重量% 基于壳的重量,交联共聚单体; (2)当至少约50重量%的甲基丙烯酸甲酯用作壳中的共聚单体时,基于壳的重量,至少约5重量%的交联共聚单体。 还公开了改进的液体标记组合物。