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    • 5. 发明授权
    • Superabsorbent polymer having improved absorption rate and absorption
under pressure
    • 超吸收性聚合物具有改善的吸收速率和在压力下的吸收
    • US5399591A
    • 1995-03-21
    • US181931
    • 1994-01-18
    • Scott J. SmithEric J. Lind
    • Scott J. SmithEric J. Lind
    • A61F13/53A61F13/15A61F13/49A61L15/00A61L15/60B01J20/26B01J20/30C08F8/00C08J9/232C08J9/236C08J9/33
    • A61F13/53A61F13/15203A61L15/60A61F2013/530656
    • A superabsorbent polymer having improved absorption under pressure and fast absorption rate is obtained by first providing a solution containing carboxylic acid monomers or water soluble salts thereof, and a crosslinking agent. A carbonate blowing agent and a polymerization initiator are added, individually or in combination, to the solution to form a carbonated monomer solution. A polymerization initiator is then added to the carbonated monomer solution which is then polymerized at temperatures ranging from about 0.degree. C. to about 130.degree. C., forming a microcellular hydrogel. The microcellular hydrogel is chopped or ground into gel pieces having a particle diameter ranging from about 0.1 mm to about 5.0 cm. The gel pieces are dried at temperatures ranging from about 85.degree. C. to about 210.degree. C., and are then ground to form a polymer having a particle size of from about 0.05 mm to about 5.0 mm. A mixture is formed from 100 parts by weight of the polymer and about 0.001 to about 30 parts by weight of a surface crosslinking agent. The polymer is reacted with the surface crosslinking agent to crosslink molecular chains existing on a surface of the polymer, forming the superabsorbent polymer.
    • 通过首先提供含有羧酸单体或其水溶性盐的溶液和交联剂,可获得在压力和吸收速度下具有改善的吸收性的超吸收性聚合物。 将碳酸酯发泡剂和聚合引发剂单独或组合加入到溶液中以形成碳酸化单体溶液。 然后将聚合引发剂加入到碳酸化单体溶液中,然后在约0℃至约130℃的温度范围内聚合,形成微孔水凝胶。 将微孔水凝胶切碎或研磨成粒径为约0.1mm至约5.0cm的凝胶片。 将凝胶片在约85℃至约210℃的温度下干燥,然后研磨形成粒径为约0.05mm至约5.0mm的聚合物。 由100重量份的聚合物和约0.001至约30重量份的表面交联剂形成混合物。 聚合物与表面交联剂反应以交联存在于聚合物表面上的分子链,形成超吸收聚合物。