申请人:——
公开号:US20040176494A1
公开(公告)日:2004-09-09
Polyisocyanurate foams are produced by mixing at least one organic isocyanate and at least one polyol in the presence of at least one aliphatic or cycloaliphatic C
4
-C
7
hydrocarbon having a boiling point of 70° C. or less at 760 millimeters pressure, at least one trimerization catalyst, at least one alkylene glycol ester of tetrabromophthalic anhydride, and at least one phosphorus ester selected from (i) tri(chloroalkyl)phosphate in which each alkyl group has 2 or 3 carbon atoms, (ii) dialkyl alkanephosphonates in which each alkyl group has 1 or 2 carbon atoms and in which the alkane group has 1 or 2 carbon atoms, and (iii) triethylphosphate, and wherein the organic isocyanate and polyol components are proportioned to form a polyisocyanurate having an isocyanate index in the range of about 240 to about 280.
聚异氰脲酸酯泡沫是在至少一种脂肪族或环脂族 C
4
-C
7
沸点为 70 摄氏度或更低的脂肪族或环脂族 C 4 -C 7 碳氢化合物的情况下(i) 三(氯烷基)磷酸酯,其中每个烷基有 2 或 3 个碳原子、(ii) 二烷基烷基膦酸盐,其中每个烷基有 1 或 2 个碳原子,烷基有 1 或 2 个碳原子;以及 (iii) 三乙基磷酸酯,其中有机异氰酸酯和多元醇组分按比例配制成多聚异氰尿酸酯,其异氰酸酯指数在约 240 至约 280 之间。