申请人:Ciba-Geigy Corporation
公开号:US05235056A1
公开(公告)日:1993-08-10
1-Hydroxy-2,6-diaryl-4-piperidone ketal derivatives, such as the compound of formula I ##STR1## wherein Ar.sub.1 and Ar.sub.2 are each phenyl, R.sub.1 to R.sub.6 are all hydrogen, X.sub.1 and X.sub.2 are each --O-- and T is a direct bond, are novel compounds and are effective process stabilizers, such as polypropylene, for polymers processed at elevated tempertures providing both good melt flow stabilization and good resistance against discoloration during said processing.
1-羟基-2,6-二芳基-4-哌啶酮缩酮衍生物,如公式I所示的化合物##STR1##,其中Ar.sub.1和Ar.sub.2各自是苯基,R.sub.1至R.sub.6都是氢,X.sub.1和X.sub.2各自是--O--,而T是直接键,是新颖的化合物,并且是有效的过程稳定剂,例如对于在升高温度下加工的聚合物如聚丙烯,提供良好的熔体流动稳定性和在所述加工过程中对变色的良好抵抗。