A method for preparing a polyurethane flexible molded or rigid foam by reacting an organic polyisocyanate with a polyol in the presence of urethane catalyst, water as a blowing agent, optionally a silicone surfactant cell stabilizer, and a cell opener characterized in that the cell opener comprises the reaction product of 1,1,1,3,5,5,5-hepta(hydrocarbyl)-trisiloxane coupled with polyalkyleneoxide mono ally ether and capped with a C1-C20 hydrocarbyl group-containing succinic anhydride.
一种制备聚
氨酯软质模塑或硬质泡沫塑料的方法,该方法是在聚
氨酯催化剂、作为发泡剂的
水、可选的有机
硅表面活性剂气室稳定剂的存在下,使有机多
异氰酸酯与多元醇反应、和开孔剂,其特征在于开孔剂包括 1,1,1,3,5,5,5-七(烃基)-三
硅氧烷与聚亚烷氧基单
烯丙基醚的反应产物,并用含 C1-C20 烃基的
丁二酸酐封端。