Polyurethane elastomers with low hardness and solvent resistance were prepared by reacting MDI-50, TDI-65 and TDI - 80 with polyester polyol respectively.
分别采用MDI - 50、TDI - 65和TDI - 80与聚酯多元醇反应制得低硬度耐溶剂聚氨酯弹性体制品。
The high temperature nitrogen dehydration method is to synthesize the certain molecular weight polyester polyol under the protection of nitrogen at high temperature.
高温氮气脱水法是在氮气保护下，高温合成聚酯多元醇。
The polyurethane glue stock used for making draft roll was investigated by using self made chain extender and modifier. The varieties and molecular weight of polyester polyol were selected.
采用自制扩链剂与改性剂，通过对聚合多元醇的品种与分子量的选择，研制出了适合纺织牵伸辊用的聚氨酯胶料。
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