公开(公告)号：US5585408A

公开(公告)日：1996-12-17

申请号：US476529

申请日：1995-06-07

申请人： William I. Harris ,  Robert L. Sammler

发明人： William I. Harris ,  Robert L. Sammler

IPC分类号： B01J39/20 ,  C08F8/36 ,  C08F257/02 ,  C08F8/38 ,  C08F8/34 ,  C08F8/56

CPC分类号： B01J39/20 ,  C08F257/02

摘要： Seeded cation-exchange resin beads are particularly susceptible to oxidative degradation which results in the leaching of organic carbon fragments. The leachability of organic carbon fragments of molecular weights greater than 1000 g/mol is reduced to less than 800 ppm by effectively crosslinking the copolymers that comprise the seeded cation-exchange in beads Crosslinking can be achieved either during sulfonation by increasing sulfone bridge formation or before sulfonation by either alkylene bridge formation or by incorporation and subsequent activation of a crosslinkable functionality in the copolymer that forms the seed in the seeded polymer bead process.

摘要翻译： 接种的阳离子交换树脂珠对氧化降解特别敏感，这导致有机碳碎片的浸出。 分子量大于1000g / mol的有机碳碎片的可浸出性通过有效地交联包含珠粒中接种的阳离子交换的共聚物而降低到小于800ppm。交联可以在磺化期间通过增加砜桥形成或在 通过亚烷基桥形成或通过在接枝的聚合物珠粒过程中形成种子的共聚物中的可交联官能团的引入和随后的活化来磺化。