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Polymeric compositions for membranes

  • US 4,207,182 A
  • Filed: 11/10/1976
  • Issued: 06/10/1980
  • Est. Priority Date: 11/14/1975
  • Status: Expired due to Term
First Claim
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1. A membrane-forming composition useful for making ultrafiltration membranes from a polymer solution thereof having a polymer concentration higher than 20%, said composition comprising a mixture of at least one non-sulphonated polysulphone and at least one sulphonated polysulphone, this mixture containing 10 to 30% by weight of a sulphonated polysulphone which has a theoretical exchange capacity of from 500 to 1200 meq/kg.

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