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    • 5. 发明授权
    • Continuous preparation of finely divided gel-like crosslinked polymers
    • 连续制备细分的凝胶状交联聚合物
    • US4769427A
    • 1988-09-06
    • US921388
    • 1986-10-22
    • Bernhard H. NowakowskyJuergen BeckHeinrich HartmannChristos Vamvakaris
    • Bernhard H. NowakowskyJuergen BeckHeinrich HartmannChristos Vamvakaris
    • B01J19/18C08F2/00C08F2/10C08F2/24C08F20/00C08F20/02C08F20/06C08F20/10C08F20/28C08F20/52C08F20/56C08F220/04
    • C08F2/10B01J19/18B01J2219/00162B01J2219/00166B01J2219/182Y10S526/92
    • Finely divided, gel-like crosslinked polymers are prepared by a continuous method in which a monomer mixture which contains, per 100 parts by weight of acrylic acid or methacrylic acid, from 50 to 100 mol % of which in each case are neutralized, acrylamide, methacrylamide or N-vinylpyrrolidone, from 0 to 30 parts by weight of other water-soluble monoethylenically unsaturated monomers and from 0 to 20 parts by weight of water-insoluble monoethylenically unsaturated monomers is copolymerized with from 0.01 to 5 parts by weight of a crosslinking agent, in 20-65% strength by weight aqueous solution in the presence of an initiator at from 45.degree. to 95.degree. C. in a single-screw cylindrical mixer whose stirrer shaft possesses disk segments which have, at the outer end, mixing bars which are arranged in a manner such that the substances fed in at the entrance of the mixer are conveyed in the axial direction to the exit of the mixer, the aqueous monomer solution in the mixer is polymerized under from 100 to 800 mbar, and some of the water is removed during the polymerization, so that a crumb-like gel having a solids content of from 30 to 70% by weight is discharged.
    • 精细分割的凝胶状交联聚合物通过连续方法制备,其中每100重量份丙烯酸或甲基丙烯酸中含有50-100摩尔%的每种情况都被中和的单体混合物是丙烯酰胺, 甲基丙烯酰胺或N-乙烯基吡咯烷酮,0〜30重量份的其它水溶性单烯属不饱和单体和0〜20重量份的水不溶性单烯属不饱和单体与0.01〜5重量份的交联剂 ,在45-95℃的引发剂存在下,在20-55%重量的水溶液中,在单螺杆圆柱形混合器中,其搅拌器轴具有在外端具有混合杆的盘段, 以使得在混合器入口处输入的物质沿轴向输送到混合器的出口的方式,将混合器中的单体水溶液聚合在 从100至800毫巴,并且在聚合期间除去一些水,从而排出固体含量为30至70重量%的碎屑状凝胶。