| 摘要 |
PURPOSE:To obtain a synthetic resin composition having remarkably improved molding stability, heat resistance, light resistance, etc., by blending a specific cyclic phosphite compound with a specific phenolic antioxidant at a specific ratio. CONSTITUTION:The aimed composition obtained by blending (A) 100 pts.wt. synthetic resin (e.g. polyethylene or polypropylene) with (B) 0.001-10 pts.wt., preferably 0.01-3pts.wt. compound expressed by formula I (R1 is tert. butyl or tert. amyl; R2 is 1-9C alkyl; R3 is H or 1-4C alkyl; R4 is 1-30C alkyl) and (C) 0.001-10pts.wt., preferably 0.01-3pts.wt. compound expressed by formula II [Ar is formula III (R5 is 1-4C alkyl; R6 is H or 1-4C alkyl) t-Bu is tert. butyl)]. |
