| 摘要 |
PURPOSE:To improve stability during processing under high-temperature conditions and to improve thermal aging resistance during use, by blending a polyolefin with specified antioxidants in combination. CONSTITUTION:100pts.wt. polyolefin is blended with 0.005-1pt.wt. hindered phenolic antioxidant having an MW of not lower than 500, 0.05-1pt.wt. hindered phenolic antioxidant having an MW of lower than 500, or 0.01-1pt.wt. phosphite or phosphonite antioxidant other than the following component, and 0.01-1pt.wt. phosphite of formula I or II (wherein R1 is a 3-8C alkyl, a cycloalkyl or an arom. group; R2 is a 1-30C alkyl, a cycloalkyl, an arom, group or H; and R1 and R2 may be the same or different groups). |
