溴化蓖麻油多元醇合成及其制备的阻燃聚氨酯硬泡性能

The Synthesis of Bromine-containing Castor Oil Polyol and the Flame-retardant Polyurethane Foam Properties

采用可再生的醇解蓖麻油多元醇为原料,与液溴进行加成反应制备溴化蓖麻油多元醇,通过红外光谱证实发生了溴化反应,并测定了产物粘度、羟值、酸值。通过发泡实验和氧指数、烟密度、水平燃烧等测试手段,考察了溴化蓖麻油基聚氨酯硬泡发泡参数和阻燃性质,并与工业级阻燃剂雅保RB-79制备的聚氨酯硬泡进行比较。结果表明,由溴化蓖麻油多元醇制备的泡沫体现出较好阻燃性能,与RB-79的阻燃效果相当。

A novel bromine-containing castor oil based polyol was prepared via the reaction of glycerin-exchanged castor oil and bromine. Structure of bromation product was analyzed by FT-IR. The basic characters of the polyol, such as viscosity, hydroxyl value and acid value were investigated. The effects of bromine-containing castor oil based polyols on properties of the rigid polyurethane foams, especially on their resistance to combustion, were studied by foam experiment, oxygen index, smoke density and horizontal burning experiments. It was compared with the foam prepared by RB-79 of Albemarle Corporation. It was found that the bromine-containing castor oil based polyols were effective for improving the resistance to combustion of rigid polyurethane foams, having the same effects with the commercial flame retardant RB-79 of Albemarle Corporation.