Moisture vapor permeable materials
AssigneeThoratec Laboratories Corporation
InventorsRobert S. Ward, Jr., Judy S. Riffle
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Abstract
Polymeric materials are provided characterized by hard segments and copolymer soft blocks comprising hydrophobic and hydrophilic components. The polymeric materials may be mixed with a base polymer and/or inorganic salts. The polymeric materials and mixtures containing same are characterized by improved moisture vapor transmission rates. The polymeric materials may be formed into films for use as wound dressings, burn dressings, surgical drapes, semipermeable membranes, and coatings for textiles.
Claims6
A coated textile impermeable to liquid water characterized by high moixture vapor transmission comprising a fabric web and a uniform nonporous coating on at least one surface of said web, said coating comprising a segmented block multipolymer comprising an essentially linear segmented copolymer chain characterized by at least one polyurethane or polyurethane urea hard segment and a soft block copolymer comprising at least one hydrophilic soft block and at least one hydrophobic soft block.
Dependencies are inferred from the claim text.