| 摘要 |
<p>PURPOSE:To obtain a polypropylene composition having long-term stability to deterioration by heat and light, by blending a specific phenolic antioxidant with a specific phosphite compound at specific amounts. CONSTITUTION:100 pts.wt. polypropylene is blended with (A) 0.001-5 pts.wt. phenolic antioxidant selected from the group consisting of pentaerythritol tetrakis(3,5-ditertiary butyl-4-hydroxyphenyl propionate) and 1,3,5-tris(3,5- ditertiary butyl-4-hydroxybenzyl)isocyanurate and (B) 0.05-5 pts.wt. (2,6- ditertiary butyl-4-methylphenyl)pentaerythritol diphosphite shown by the formula.</p> |
