Intrauterine systems, including polygonal deposits and outer shells of thermopolyurethane elasticity, include reaction products of 1,6-hexamethyl diisocyanate, a polycarbonate component, and a multifunctional alcohol component. As External Chain Extender

摘要

p Intrauterine system for insertion into a uterine cavity for a long time and meacute; all to manufacture it, which comprises a tank and a continuous, closed and flexible framework containing a thermoplastic polyurethane elastoacute; static meacute; all to supply a substance to a mammals; and polyurethane elastoacute; /p