New polyhydric phenol coesters are disclosed of polyhydric phenols, having 2 to 3 phenolic hydroxyl groups and 1 to 3 benzenoid rings, with carbonic acid and an organophosphonic acid having linked to phosphorus an alkyl, aryl, aralkyl or alkaryl group optionally substituted with a phenolic hydroxyl group. The new coesters have molecular weights up to a maximum of about 10,000, preferably from 1000 to 9000, and are highly effective stabilizers for a variety of synthetic resins.
Stabilizer compositions comprising a polyhydric phenol coester and a known polymer stabilizer, as well as synthetic resins stabilized with such stabilizer compositions, are also disclosed.
新的多羟基
酚共聚物由多羟基
酚、
碳酸和有机
膦酸组成,
碳酸和有机
膦酸具有 2 至 3 个
酚羟基和 1 至 3 个苯环,
碳酸和有机
膦酸具有与
磷相连的烷基、芳基、芳烷基或烷芳烷基,这些烷基、芳基、芳烷基或烷芳烷基可选择被
酚羟基取代。新型共聚物的分子量最高可达 10,000 左右,最好在 1000 到 9000 之间,是各种合成
树脂的高效稳定剂。
此外,还公开了由多羟基
苯酚共聚物和已知聚合物稳定剂组成的稳定剂组合物,以及用这种稳定剂组合物稳定的合成
树脂。