Tertiary amine catalysts having isocyanate reactive groups that are capable of forming thermally stable covalent bonds able to withstand temperatures up to 120° C. are disclosed. These catalyst can be used to produce polyurethane foam having the following desirable characteristics: a) very low chemical emissions over a wide range of environmental conditions and isocyanate indexes (e.g. indexes as low as 65 but higher than 60) while meeting all physical property requirements; b) sufficient hydrolytic stability to maintain the catalyst covalently bound to foam without leaching of tertiary amine catalyst when foam is exposed to water or aqueous solutions even at temperatures higher than ambient (temperature range 25° C. to 90° C.); and c) stable contact interface between the polyurethane polymer and other polymers (for example polycarbonate) with minimal migration of tertiary amine catalyst from polyurethane polymer to other polymers yielding no noticeable polymer deterioration at the point of contact even under conditions of heat and humidity.
揭示了具有
异氰酸酯反应基团的三级胺
催化剂,能够形成能够承受高达120°C温度的热稳定共价键。这些
催化剂可用于生产具有以下理想特性的聚
氨酯泡沫:a) 在各种环境条件和
异氰酸酯指数(例如指数低至65但高于60)下,
化学排放极低,同时满足所有物理性能要求;b) 具有足够的
水解稳定性,使
催化剂能够共价结合到泡沫中,即使在高于环境温度的条件下,泡沫暴露在
水或
水溶液中(温度范围为25°C至90°C)也不会渗漏三级胺
催化剂;c) 聚
氨酯聚合物与其他
聚合物(例如聚
碳酸酯)之间的稳定接触界面,使三级胺
催化剂从聚
氨酯聚合物迁移到其他
聚合物的最小,即使在热和湿度条件下,接触点处也不会出现明显的
聚合物恶化。