Thermoplastic polyurethane composition for high rebound foam

Abstract

A composition is provided comprising a microporous foam comprising a thermoplastic polyurethane copolymer comprising a reaction product of the following reactants: (a) at least one diisocyanate; (b) at least one chain extender; and (c) at least one bifunctional polyol; and (d) at least one higher functional polyol having an average hydroxyl functionality greater than about 2; wherein the higher functional polyol is present in the thermoplastic polyurethane copolymer in an amount greater than 0 to less than 10% by weight, based on the total weight of the thermoplastic polyurethane copolymer; and wherein the thermoplastic polyurethane copolymer has a hardness from 70 to 90 A, as measured by ASTM D2240. Provided is a composition including a microcellular foam including a thermoplastic polyurethane copolymer including a reaction product of the following reactants: (a) at least one diisocyanate; (b) at least one chain extender; and (c) at least one difunctional polyol; and (d) at least one higher-functional polyol having an average hydroxyl functionality of greater than about 2; wherein the higher-functional polyol is present in the thermoplastic polyurethane copolymer in an amount of from greater than 0 to less than 10 weight percent, based on the total weight of the thermoplastic polyurethane copolymer; and wherein the thermoplastic polyurethane copolymer has a hardness of from 70 to 90 A, as measured by ASTM D2240.