Hexamethylene diisocysnate (HMDI) may be used in prepolymer, in place of TD I.
The one step method was adopted in this study to synthesize aliphatic polyurethane with 4,4 methylene dicyclohexyl diisocyanate(HMDI), 1,4 butanediol(BDO) and poly (tetrahydrofuran)(PTMG).
采用一步法合成以4 ，4'-**二环已基二异**酯（HMDI）、扩链剂1，4 -丁二醇（BDO）为硬段，聚四*呋喃醚（PTMG）为软段的脂肪族聚氨酯。
