High Moisture Vapor Transmissive Polyurethanes

A thermoplastic polyurethane composition comprising:

• the reaction product of:
• (a) a mixed polyol component, the mixed polyol component comprising at least one poly(ethylene oxide) polyol and at least one poly(alkylene oxide) polyol;
• (b) at least one polyisocyanate;
• (c) at least one chain extender;
• and
• (d) optionally at least one catalyst,
• wherein the mixed polyol component comprises from about 5 mole percent to about 15 mole percent of one or more C3 to C15 alkylene oxides, the balance being derived from ethylene oxide.

An article comprising:

• a breathable polyurethane layer;
• and
• a substrate layer attached to the breathable polyurethane layer,
• wherein the substrate layer comprises a woven or non-woven material and the breathable polyurethane layer comprises the reaction product of:
• (a) a mixed polyol component, the mixed polyol component comprising at least one poly(ethylene oxide) polyol and at least one poly(alkylene oxide) polyol;
• (b) at least one polyisocyanate;
• (c) at least one chain extender;
• and
• (d) optionally at least one catalyst,
• wherein the mixed polyol component comprises from about 1 mole percent to about 20 mole percent of one or more C3 to C15 alkylene oxides, the balance being derived from ethylene oxide.