Method for the continuous production of crosslinked particulate gel-type polymers

Method for the continuous production of crosslinked particulate gel-type polymers

  • CN 101,031,591 A
  • Filed: 09/21/2005
  • Published: 09/05/2007
  • Est. Priority Date: 09/28/2004
  • Status: Active Application
First Claim
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1. One kind by in kneader, making following monomer copolymerization the method for the crosslinked particulate of continuous production addition polymer gel:

  • A) water-soluble mono ethylenically unsaturated monomer,B) be the monomer that comprises at least two polymerizable groups of 0.001-5mol% based on monomer (a), the material that described kneader will be introduced at its upstream end wherein satisfies at least one following condition in the method axially to be delivered to the downstream end of this mixing tank;

    I) fill level in the mixing and kneading machine is not less than 71%,Ii) the water-soluble mono ethylenically unsaturated monomer comprises 150ppm hydroquinone half ethers at the most,Iii) the temperature of polymeric area surpasses 65 ℃

    ,Iv) the back-mixing of described kneader ratio is lower than 0.33.

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