Castor oil is a triglyceride extracted from the seed (castor bean) of the castor plant. This plant will thrive on relatively poor soil and in an arid climate. The oil is nonedible but is produced annually in large volume to be converted to biodiesel (largely for the European market). The oil contains both unsaturation and hydroxyl functionality that may be utilized for conversion to flame retarding materials. A series of phosphorus esters has been generated from castor oil. All display good flame retardancy in the diglycidyl ether of bisphenol A (DGEBA) epoxy resin. Introduction of bromine at the double bond generally enhances the flame retardancy of these esters.

中文翻译：

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源自大量可利用的可再生生物资源，蓖麻油的聚合物材料的阻燃化合物

蓖麻油是从蓖麻植物的种子（蓖麻籽）中提取的甘油三酸酯。这种植物将在相对贫瘠的土壤和干旱气候下繁衍生息。这种油是不可食用的，但每年都会大量生产，然后转化为生物柴油（主要用于欧洲市场）。该油同时包含不饱和度和羟基官能度，可用于转化为阻燃材料。蓖麻油已经产生了一系列的磷酸酯。在双酚A（DGEBA）环氧树脂的二缩水甘油醚中，所有化合物均显示出良好的阻燃性。在双键处引入溴通常增强这些酯的阻燃性。