| 摘要 |
PURPOSE:A polyolefin composition having good heat resistance and weather resistance and improved discoloration in pink, obtained by blending polyolefin with specific two compounds and a specified phosphorus weather-resistant stabilizer. CONSTITUTION:100pts.wt. polyolefin is blended with (A) tetrakis[methylene-3-(3,5- di-t-butyl-4-hydroxyphenyl)propionate]methane, such as 0.03-0.3pt.wt. compound shown by formula I, (B) bis(2,2',6,6'-tetraalkyl-4-piperidine)dicarboxylate, such as 0.05-0.4pt.wt. compound shown by formula II and (C) one or more phosphorus type stabilizer of hydrogenated bisphenol type-pentaerythritol phosphite polymer, di-10-20C alkylpentaerythritol diphosphite, etc., such as compounds shown by formula III formula IV in an amount to give 50-500wt% based on total amounts of the components A and B and the aimed composition is obtained. |
