Michael M. Azad;Mark Joy;Scott J. Smith;Michael S. Jarman;Geoffrey Wyatt Blake
发明人:
Michael M. Azad,Scott J. Smith,Mark Joy,Geoffrey Wyatt Blake,Michael S. Jarman
申请号：
US12254434
公开号：
US08222477B2
申请日:
2008.10.20
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel； (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.
