反应型阻燃聚醚多元醇的合成及应用

Synthesis and application of reactive flame retardant polyether polyols

采用二溴丁烯二醇与环氧氯丙烷反应得到聚环氧氯丙烷,再在碱性条件下闭环反应得到双缩水甘油醚,最后水解得到含溴、氯元素的反应型阻燃聚醚多元醇。利用HNMR跟踪表征了每一步反应的产物,并考察了水解反应中所用共混溶剂的量及甲醇-水比例对最终产物性能的影响。结果表明,水解反应所用的共混溶剂(甲醇-水)与投料质量比为1∶1,且甲醇与水的质量比为1∶1时,得到的聚醚多元醇应用于硬质聚氨酯泡沫时能达到苏威公司的IXOL M512相当的效果,具有优异的阻燃性能。

The polyepichlorohydrin was obtained by the reaction of 2,3-dibromo-2-butene-1,4-diol and epichlorohydrin, and then under alkaline conditions the diglycidyl ether was prepared by the closed-loop reaction. Finally,the bromine,chlorine-containing reactive flame-retardant polyether polyols was obtained by hydrolysis. The products of each reaction step were characterized by HNMR,and the effects of the amount of blended solvent used in the hydrolysis reaction and the mass ratio of methanol to water on the properties of final product were investigated. The results showed that the optimum mass ratio of mixed solvent （methanol-water）to feeding materials used in the hydrolysis reaction was 1 ： 1,and the mass ratio of methanol to water was 1 ： 1. The polyether polyol could be used in the rigid polyurethane foam and achieved the Soviet Union＇s IXOL M512 considerable effect,with excellent flame retardant properties.