A polyether polyol-based premix was prepared, and bulky rigid polyurethane based on it was prepared by free foaming techniope. Some factors in core-scorch controlling are discussed.

  • 制备了聚醚组合料,并采用自由发泡工艺制备大体积硬质聚氨酯泡沫塑料,讨论了控制泡沫烧芯的有关因素。
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