Biocompatible polyurethanes modified with lower alkyl sulfonate and lower alkyl carboxylate
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United States of America Patent
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Nov 14, 1989
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N/A
app pub date -
Jun 3, 1987
filing date -
Jun 3, 1987
priority date (Note) -
Expired
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Abstract
Modified-polyurethane block copolymers and devices formed therefrom demonstrate excellent biocompatibility and improved physical and mechanical properties. In a preferred embodiment, from about 5 to about 25 percent of urethane hydrogen atoms are replaced with propyl sulfonate and propyl carboxylate groups to provide the modified copolymer.
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