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Polyurethane hydrogel and method for the production of the same

  • US 4,118,354 A
  • Filed: 08/17/1976
  • Issued: 10/03/1978
  • Est. Priority Date: 11/24/1972
  • Status: Expired due to Term
First Claim
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1. A polyurethane hydrogel obtained by dispersing:

  • (a) a reaction product obtained by the reaction of polyisocyanate having at least two isocyanate groups with a polyether into(b) an aqueous liquid phase;

    wherein the amounts of said (a) and (b) are such that the hydrogel product has a water content of 70 to 95% by weight and wherein said polyether is produced from a plurality of alkylene oxides, 75 to 85% by weight of which is ethylene oxide, added at random to a polyalcohol having at least two terminal hydroxyl groups in an amount to produce an average molecular weight of 2000 to 3000 per said terminal hydroxyl group of said polyalcohol.

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