Insulating unit are disclosed which are prepared by a cavity-filling, fast-gelling rigid polyurethane foam based on a formulation comprising a polyol component which contains at least 5 weight percent of an amine-initiated polyols and 1.4 to 4 parts by weight of a catalyst package whereby the catalyst package contains at least one amine catalyst and the weight percent nitrogen present in the amine-initiated polyol to weight percent nitrogen present in the catalyst system is from 2 to 8. The formulation is injected into the cavity and the pressure in the cavity is subjected to reduced atmospheric pressure to achieve the rigid foam having a thermal conductivity of less than about 19 mW/mK at 10°C average plate temperature.
本发明公开了一种空腔填充、快速胶凝硬质聚
氨酯泡沫塑料,其制备方法基于一种配方,该配方包含一种多元醇组分,该多元醇组分含有至少 5 重量百分比的胺引发多元醇和 1.4 至 4 重量份的催化剂包,其中催化剂包包含至少一种胺催化剂,且存在于胺引发多元醇中的氮的重量百分比与存在于催化剂系统中的氮的重量百分比之比为 2 至 8。将配方注入空腔中,空腔中的压力受到降低的大气压力的作用,以获得在 10°C 平均板温下导热系数小于约 19 mW/mK 的硬质泡沫。