Patent ID: 8946375
Filing Date: 2015-02-03
Classification: A63B,B29C,B29L,C07C,C08G,C09D

Abstract:
1. A method for making a dried over-indexed thermoplastic polyurethane elastomer precursor having unreacted isocyanate moieties, the method comprising: combining reactants and reacting them to form an over-indexed thermoplastic polyurethane elastomer precursor, cooling the over-indexed thermoplastic polyurethane elastomer precursor in water to form cooled precursor, pelletizing the cooled precursor to form cooled precursor pellets, drying the cooled precursor pellets to a moisture concentration less than about 800 ppm to form dried over-indexed thermoplastic polyurethane elastomer precursor, and packaging the dried over-indexed thermoplastic polyurethane elastomer precursor in moisture-resistant packaging under conditions that essentially maintain the moisture content of the dried over-indexed thermoplastic polyurethane elastomer precursor at or below about 800 ppm.