Difunctional weather-resistant stabilizer and polymer composition containing the same

A difunctional weather-resistant stabilizer having one terminal semicarbazide functional moiety and one terminal hindered phenol functional moiety, said difunctional weather-resistant stabilizer being represented by:

• wherein
• R1 represents a C1-C8 alkyl group;
• each R2 is independently selected from the group consisting of hydrogen and a C1-C8 alkyl group;
• and
• Z is a divalent organic group which represents
• R3 is selected from the group consisting of a C1-C18 alkylene group, a cycloalkylene group, an arylene group, an aralkylene group, and an alkarylene group;
• and x is selected from the group consisting of
• —NH—NH— and —Y1—RORnY2—,
• wherein
• Y1 and Y2 are independently selected from the group consisting of —O— and —NH—;
• R represents a C1-C6 alkylene group;
• and
• n represents an integer ranging from 0 to 2.