| 摘要 |
PURPOSE:To provide the titled composition having remarkably improved stability and heat-resistance at a high temperature region, by compounding a specific organophosphorus compound in combination with a specific phenolic compound and a specific triazine compound to a polyolefin. CONSTITUTION:The objective compositon can be prepared by compounding (A) 100pts.wt. of an olefin polymer with (B) 0.01-1.0pt.wt., preferably 0.03-0.25pts. wt. of tetrakis(2,4-di-t-butylphenyl) 4,4'-biphenylene diphosphonite and (C1) 0.01- 0.50pts.wt., preferably 0.03-0.15pts.wt. of 4-hydroxymethy1-2,6-di-t-butylphenol or (C2) 0.01-1.0pt.wt., preferably 0.03-0.25pts.wt. of 1,3,5-tris(3,5-di-t-butyl-4-hydroxybenzyl)-s-triazine-2,4,6-(1H,3H,5H) -trione. Remarkable effect can be attained when the component (A) is a polymer for high-temperature molding use, e.g. 4- methyl-1-pentene polymer. |
