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Hydrogels and methods for their production

  • US 7,297,726 B2
  • Filed: 06/30/2004
  • Issued: 11/20/2007
  • Est. Priority Date: 04/10/2000
  • Status: Expired due to Term
First Claim
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1. A method of preparing a hydrogel having a low elasticity modulus from a hydrophilic polymer, comprising the steps of:

  • (a) selecting a hydrophilic polymer of sufficiently high molecular weight, wherein the hydrophilic polymer has a hydroxyl group-carrying carbon-carbon backbone;

    (b) dissolving said polymer in a solvent to a concentration not exceeding about 5% (wt);

    (c) adding a crosslinking agent;

    (d) mixing and reacting the polymer with the crosslinking agent; and

    (e) evaporating said solvent; and

    (f) optionally adding water.

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