| abstract |
A method of manufacturing a thermoplastic polyurethane having a tensile strength of greater than 20 MPa is described, the method using a co-rotating reaction extruder to react the following:(i) an isocyanate having two isocyanate groups per molecule;(ii) a polydiene diol having from 1.6 to about 2 terminal hydroxyl groups per molecule and a number average weight of at least 500 and less than 20,000; and(iii) one or more chain extenders. |