The use of a liquid for the preparation of a rigid polyurethane and/or polyisocyanurate foam by reacting a polyisocyanate and a polyol in the presence of a blowing agent characterised in that the liquid is an inert, insoluble, non-blowing liquid. CFC-free foams may be obtained showing good insulating properties.
使用液体制备硬质聚
氨酯和/或聚异
氰脲酸酯泡沫塑料,方法是在发泡剂存在的情况下,使多
异氰酸酯和多元醇发生反应,其特点是液体为惰性、不溶解、不发泡的液体。可以获得不含 CFC 的泡沫塑料,具有良好的绝缘性能。