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    • 49. 发明授权
    • Novel starch ether derivatives, a method for the preparation thereof
    • 新型淀粉醚衍生物,其制备方法
    • US4260738A
    • 1981-04-07
    • US110926
    • 1980-01-10
    • Martin M. Tessler
    • Martin M. Tessler
    • C08B31/08C08B31/12D21H17/28C08B31/10C08B31/14D21H3/28
    • D21H17/28C08B31/08C08B31/125
    • Starch ether derivatives are prepared by reacting a starch base with N-(2-haloethyl)iminobis(methylene)diphosphonic acid or with a N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acid. The derivatives contain aminophosphonic acid groups (or their salts) as zwitterion substituents which consist of either one or two anionic methylene phosphonic acid groups bound to a cationic nitrogen. Their cationic or anionic characteristics may be increased by introducing suitable cationic or anionic groups either by simultaneous reaction with the aminophosphonic acid reagent or by consecutive reaction either prior to or subsequent to the aminophosphonic acid reaction. They are especially useful as pigment retention aids in paper making processes.
    • 淀粉醚衍生物通过使淀粉碱与N-(2-卤代乙基)亚氨基双(亚甲基)二膦酸或N-(烷基)-N-(2-卤代乙基)氨基甲基膦酸反应来制备。 衍生物含有作为两性离子取代基的氨基膦酸基团(或它们的盐),其由与阳离子氮结合的一个或两个阴离子亚甲基膦酸基团组成。 通过与氨基膦酸试剂同时反应或在氨基膦酸反应之前或之后通过连续反应引入合适的阳离子或阴离子基团,它们的阳离子或阴离子特征可以增加。 它们在造纸过程中特别适用于颜料助留剂。