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    • 10. 发明授权
    • Process to produce water absorbent polymers
    • 生产吸水性聚合物的方法
    • US4777231A
    • 1988-10-11
    • US117789
    • 1987-11-06
    • Kristy M. BaileyJeffrey R. Cramm
    • Kristy M. BaileyJeffrey R. Cramm
    • C08F2/32C08F2/00
    • C08F2/32Y10S526/93
    • A water-in-oil suspension polymerization process of the type comprising a process for preparing a water-insoluble polymer capable of absorbing water, aqueous salt solutions and blood, which utilizes as the suspending agent a cellulose ester or ether protective colloid, the improvement which comprises using as the protective colloid an oil-soluble, water-insoluble, polymeric surfactant instead of the cellulose derivatives, in an amount sufficient to stabilize the emulsion, said polymeric surfactant having the formula: ##STR1## wherein x is a whole number greater than about 5, the mole ratio of a:b is from 3:1 to 1:3, provided the HLB number is maintained at less than about 14, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from the group consisting of hydrogen, alkyl (C.sub.1-16), aryl (C.sub.6-12), alkaryl (C.sub.7-12), and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are such that the surfactant is oil-soluble and water-insoluble.
    • 一种油包水悬浮聚合方法,其包括用于制备能吸收水的水不溶性聚合物的方法,含水盐溶液和血液,其用作纤维素酯或醚保护胶体作为悬浮剂,其改进是 所述聚合物表面活性剂具有下列通式:其中x是大于 约5,a:b的摩尔比为3:1至1:3,条件是HLB值保持在小于约14,R1,R2,R3和R4独立地选自氢,烷基 (C1-16),芳基(C6-12),烷芳基(C7-12)和R1,R2,R3和R4表面活性剂是油溶性和水不溶性的。