High absorbency hydrogel wound dressing

A hydrogel composition for use in a wound dressing formed from a mixture comprising:

• (a) from about 0% to about 90% by weight polyhydric alcohol selected form the group consisting of polypropylene glycol, polyethylene glycol and glycerine;
• (b) from about 6% to about 60% by weight isophoronediisocyanate terminated prepolymer based on polyols containing more than about 40% polyethylene oxide and having an isocyanate content of about 3% by weight;
• (c) from about 4% to about 40% by weight polyethylene oxide based diamine;
• (d) up to about 2% by weight sodium chloride;
• and
• (e) the balance water.

A hydrogel composition formed from a mixture comprising:

• (a) from about 15% to about 30% by weight polyhydric alcohol selected from the group consisting of polypropylene glycol, polyethylene glycol and glycerine;
• (b) from about 8% to about 14% by weight isophoronediisocyanate terminated prepolymer based on polyols containing more than about 40% polyethylene oxide and having an isocyanate content of about 3% by weight;
• (c) from about 5% to about 10% by weight polyethylene oxide based diamine, said isophoronediisocyanate terminated prepolymer and said polyethylene oxide based diamine having a stoichiometric ratio of about 1:1;
• (d) up to about 1% by weight sodium chloride;
• and
• (e) the balance water.