Process for preparing clay-containing superabsorbent polymer, superabsorbent polymer, sanitary article, diaper, method of absorbing an aqueous medium, and diaper having a core
MICHAEL AZAD,SCOTT SMITH,MARK C. JOY,GEOFFREY W. BLAKE,MICHAEL S. JARMAN
申请号：
BRPI0920242
公开号：
BRPI0920242A2
申请日:
2009.10.13
申请国别(地区):
BR
年份:
2015
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.
