The short chain diol (B) to be optionally used for the thermoplastic polyurethane resin in accordance with the invention has a molecular weight in the range from about 50 to 500 and may include, for example, an aliphatic glycol such as ethylene glycol, propylene glycol, 1,4-butylene glycol, 1,6-hexane glycol, neopentyl glycol or the like or an aromatic diol such as ethylene oxide adduct or propyle