This invention relates to a polyisocyanate prepolymer for polyurethane and polyurethane/urea elastomer synthesis and to the resulting elastomer. The prepolymer is formed by reacting an alkyl C₁₋₆ substituted toluenediisocyanate with a long chain diol under conditions such that essentially a 2:1 adduct is formed. Excess alkyl-substituted toluenediisocyanate is removed prior to forming the elastomer.
本发明涉及一种用于聚
氨酯和聚
氨酯/
尿素弹性体合成的多
异氰酸酯预聚物,以及由此产生的弹性体。该预聚物是由 C₁₋₆取代
甲苯二异氰酸酯烷基与长链二元醇在基本上形成 2:1 加合物的条件下反应而成。过量的烷基取代
甲苯二异氰酸酯在形成弹性体之前被除去。