在聚酯多元醇中加入复合无机阻燃剂和复合催化剂，与多异氰酸酯反应制备硬质聚异氰脲酸酯（ PIR）泡沫塑料。研究了无机阻燃剂和复合催化剂对泡沫的氧指数、尺寸稳定性等硬泡性能的影响。结果表明，当聚酯多元醇为100份，复合催化剂总量4�5份，且叔胺类催化剂与有机金属催化剂质量比为4∶1，复合阻燃剂总量20份，且SiO2与膨胀石墨质量比为1∶2，制得的PIR硬泡氧指数达到30％，导热系数0�019 W／（ m·K ），密度48 kg／m3，线性收缩率0�20％，压缩强度185 kP a。%The polyisocyanurate foam was prepared by polyester polyols, polyisocyanate, combined catalysts and composite inorganic flame retardants, etc. The influences of combined catalysts and combined inorganic flame retardants on the oxygen index and other properties of the PIR foam were investigated. The results showed that, when the dosage of all catalysts and all flame retardants were 4�5 and 20 parts respectively ( based on 100 parts poly⁃ester polyols) , the mass ratio of tertiary amine catalyst and organometallic catalyst was 4∶1, and mass ratio of sili⁃con dioxide and expansible graphite was 1∶2, the limited oxygen index of PIR foam would be reached to 30%, and the coefficient of thermal conductivity was about 0�019 W/(m·K), while the density was 48 kg/m3,the linear shrinkage was 0�20%, compression strength was 185 kPa.
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