THERMOPLASTIC POLYURETHANES WITH CRYSTALLINE CHAIN ENDS

摘要

The present invention relates to novel thermoplastic polyurethane (TPU) compositions that have crystalline chain ends. The TPU compositions of the invention can provide improved resiliency, lower surface free energy, and/or reduced stickiness, while maintaining other desirable physical properties. The present invention also provides the described TPU compositions that are further grafted with vinyl alkoxysilane moieties allowing for crosslinked networks of the TPU compositions. The present invention also provides plasticizer-free, very soft TPU compositions without the processing difficulties often associated with such materials. The invention further provides means of reducing the surface tension of a TPU composition which can allow for improved blend compositions, and means of crosslinking the described TPU compositions.

主权项

1. A thermoplastic polyurethane composition comprising the reaction product of (i) a polyisocyanate component, (ii) at least one of a chain extender component and a polyol component, and (iii) a chain terminator component;
wherein the chain terminator component comprises a short chain crystalline compound containing more than 12 carbon atoms and a single NCO-reactive functional group capable of terminating the chain of a thermoplastic polyurethane resulting from the reaction of components (i) and (ii).