An stabilized thermoplastic composition comprising a stabilizing amount of a phosphite of the formula:
R1 is independently selected from the group consisting of alkyl groups having from 1 to 9 carbon atoms, Y is independently selected from the group consisting of hydrogen, halogen, or alkyl; and the -O-X groups are positioned at the respective ortho- or para- positions with respect to the diphenyl linkage, the remaining ortho- and para- positions with respect to the -O-X linkage being occupied by R1 whereby the -O-X groups are hindered by the presence of at least one R1 group; R2 group is a divalent alkylidene radical having from 1 to 6 carbon atoms or a direct bond; and wherein X has the formula:
一种稳定热塑性塑料组合物,包含一定量的式中
亚磷酸稳定剂:
R1 独立地选自由 1 至 9 个碳原子的烷基组成的组,Y 独立地选自由氢、卤素或烷基组成的组;且 -O-X 基团分别位于相对于二苯基连接的正对位或对等位,相对于 -O-X 连接的其余正对位和对等位被 R1 占据,其中 -O-X 基团因至少一个 R1 基团的存在而受阻;R2 基团是具有 1 至 6 个碳原子的二价亚烷基或直接键;且其中 X 具有式: