Method for producing water-absorbing polymer particles having high swelling speed

Method for producing water-absorbing polymer particles having high swelling speed

  • CN 103,347,548 A
  • Filed: 02/07/2012
  • Published: 10/09/2013
  • Est. Priority Date: 02/07/2011
  • Status: Active Application
First Claim
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1. method for preparing the water-absorbing polymeric particles with high free swell speed, described method is following carries out:

  • polymerization contains monomer solution or the suspension of following material;

    A) at least a ethylenically unsaturated monomers that has acid groups and can partly be neutralized at least,F) at least a cross-linking agent,G) at least a initiator,H) Ren Xuan one or more can with a) described in the ethylenically unsaturated monomers of monomer copolymerization, andI) Ren Xuan one or more water-soluble polymers,The polymer gel of dry, grinding and classification gained, described polymer beads is classified to the granularity of m to n μ

    m, and wherein m is 50 to 300, n to be 400 to 1200, with the classified polymer beads of following material coating;

    F) back, at least a surface cross-linking agent, andG) Ren Xuan at least a multivalent metal cationAnd it is carried out behind the hot surface crosslinked, wherein, the moisture after water-absorbing polymeric particles is crosslinked behind hot surface has improved 1 to 150 weight %, and subsequently water-absorbing polymeric particles is carried out drying.

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