The present invention is directed to a polyol blend comprising:
(a) from about 30 to about 90 percent by weight of a polyester diol having an OH number of from about 50 to about 500 and having the structure:
wherein each R may be the same or different and represents a radical of the formula:
where R" represents H or CH3 with the proviso that both R"s cannot be CH3, and y represents a number of from 1 to 5, wherein R' represents an aromatic radical having from 6 to 12 carbon atoms, and wherein x represents a number of from 0 to 5,
(b) from about 2 to about 40 percent by weight of an organic compound containing from 3 to 8 hydroxyl groups and being selected from the group consisting of
(i) compounds having OH numbers of from about 250 to about 1830 and being free of carboxylic acid ester groups,
(ii) compounds having OH numbers of from about 150 to about 1000 and containing at least one carboxylic acid ester group, and
(iii) mixtures thereof,
(c) from about 5 to about 30 percent by weight of a condensation product formed from 1 mole of a phenol and from 4 to 15 moles of ethylene oxide, and
(d) from 0 to about 40 percent by weight of at least one diol of the structure:
where R" and y are as defined above, and to an isocyanurate foam prepared therefrom.
本发明涉及一种多元醇混合物,其中包括
(a) 以重量计,约 30%至约 90%的聚酯二元醇,其 OH 数约为 50 至约 500,并具有以下结构:
其中每个 R 可以相同或不同,并代表式中的一个基:
其中 R "代表 H 或
CH3,但两个 R 不能都是 ,y 代表 1 至 5 的数字,其中 R'代表具有 6 至 12 个碳原子的芳香基,x 代表 0 至 5 的数字、
(b) 约 2%至约 40%(按重量计)的有机化合物,该有机化合物含有 3 至 8 个羟基,并选自以下组成的组
(i) 具有约 250 至约 1830 个羟基且不含
羧酸酯基的化合物、
(ii) 具有约 150 至约 1000 个羟基且含有至少一个
羧酸酯基团的化合物,以及
(iii) 它们的混合物、
(c) 1 摩尔
苯酚与 4 至 15 摩尔
环氧乙烷形成的缩合产物,重量百分比为 5%至 30%,以及
(d) 至少一种结构的二元醇,重量占 0%至约 40%:
其中 R "和 y 如上文所定义,以及由此制备的异
氰脲酸酯泡沫。