A polyurethane catalyst composition comprises N,N'-bis(3-dimethylaminopropyl) urea and 3-dimethylaminopropyl urea in a ratio that can be varied to systematically control flowability, % open cell content and k-factor value for rigid polyurethane foam to enhance processibility. Increasing the N,N'-bis(3-dimethylaminopropyl) urea to 3-dimethylaminopropyl urea ratio decreases the open cell content and k-factor value of the foam whereas decreasing the N,N'-bis(3-dimethylaminopropyl) urea to 3-dimethylaminopropyl urea ratio improves the flowability of the foaming composition.
一种聚
氨酯催化剂组合物由 N,N'-双(3-二甲基
氨基丙基)
脲和 3-二甲基
氨基丙基
脲组成,其比例可以改变,以系统控制硬质聚
氨酯泡沫的流动性、开孔率和 k 因子值,从而提高加工性能。提高 N,N'-双(3-二甲基
氨基丙基)
脲与 3-二甲基
氨基丙基
脲的比例会降低泡沫的开孔率和 k 因子值,而降低 N,N'-双(3-二甲基
氨基丙基)
脲与 3-二甲基
氨基丙基
脲的比例则会提高发泡组合物的流动性。