They are synthesized by the reaction of a polyester polyol, or polyether polyol, with an aromatic or aliphatic isocyanate. 他们由一种聚酯多羟基化合物或聚醚多羟基化合物与另一种芳香或脂肪族异氰酸盐的反应而合成。
Such agents have low boiling points and boil from the heat generated during the exothermic reaction between isocyanate and polyol. 这样代理有低落沸点和煮沸从热引起在放热反应期间在异氰酸盐和多羟基化合物之间。
美
[ˌaɪsə'saɪəˌneɪt]
