| 摘要 |
Organic materials, especially polyolefins, which are subject to ultraviolet light degradation, are effectively stabilized with compounds having the formula WHEREIN R1 and R2 are lower alkyl or cycloalkyl, R3 is hydrogen, alkyl, beta -methoxyethyl, alkenyl, propargyl, benzyl, or alkenyl substituted benzyl, and R4 is lower alkylene. |
