A method for making flexible polyurethane foam in which a polyisocyanate is reacted with a polyol in the presence of a urethane catalyst, a blowing agent, optionally a silicone surfactant cell stabilizer, and a cell opening additive. The cell opening additive comprises an active methylene or methine compound which also contains a tertiary amine. Preferred cell opening additives are 2-cyano-N-[3-(dimethylamino)-propyl]acetamide and (NC)CH2C(O)OCH2CH2N(CH3)CH2CH2OCH2CH2N(CH3)2.
一种制造软质聚
氨酯泡沫塑料的方法,在该方法中,多
异氰酸酯与多元醇在聚
氨酯催化剂、发泡剂、可选的
硅酮表面活性剂气室稳定剂和气室开放添加剂的存在下发生反应。开孔添加剂包括活性亚甲基或甲基化合物,其中还含有叔胺。首选的开孔添加剂是 2-
氰基-N-[3-(二甲基
氨基)-丙基]乙酰胺和 (NC)CH2C(O)OCH2CH2N(
CH3)CH2CH2OCH2CH2N( )2。