Halogen-containing resins, particularly polyvinyl chloride, are stabilized by the incorporation of a phosphite of the formula, ##EQU1## wherein one or two of groups R.sub.1, R.sub.2 or R.sub.3 has the formula, R(OC.sub.n H.sub.2n).sub.m --, in which R is an alkyl unsubstituted or substituted with at least one hydroxyl or chlorine, an alkenyl unsubstituted or substituted with at least one hydroxyl or chlorine, or an aralkyl, n has a value of from 1 to 4, and m has a value of from 1 to 8, and the remaining group R.sub.1, R.sub.2 and/or R.sub.3 is an alkyl unsubstituted or substituted with at least one hydroxyl or chlorine, an alkenyl unsubstituted or substituted with at least one hydroxyl or chlorine, an aralkyl or an unsubstituted aryl.
                            含卤素
树脂,特别是聚
氯乙烯,通过加入以下式子的
亚磷酸酯进行稳定,其中R.sub.1、R.sub.2或R.sub.3中的一个或两个具有以下式子:R(OC.sub.n H.sub.2n).sub.m --,其中R是未取代或取代至少一个羟基或
氯的烷基,未取代或取代至少一个羟基或
氯的烯基,或芳基甲基,n的值为1至4,m的值为1至8,其余的R.sub.1、R.sub.2和/或R.sub.3是未取代或取代至少一个羟基或
氯的烷基,未取代或取代至少一个羟基或
氯的烯基,芳基甲基或未取代的芳基。