POLYURETHANE CRYSTALLINE THERMOPLASTIC AND METHOD FOR THE PRODUCTION THEREOF

摘要

The compound has the general formula I (1<f<500;1<f' 15;R and R' are alkyl or aryl) and X has the formula II (2<n<140;1<(n+n')<51). The method comprises reacting a polyether-polycaprolactone block copolymer having a molecular weight ranging from 1,000 to 6,000 and having formula IIa with a chain extender of formula HO-R'-OH and with a diisocyanate of formula OCN-R-NCO.