| 摘要 |
PROBLEM TO BE SOLVED: To obtain stabilizers capable of manifesting excellent stability in a rotational molding by combining an organic phosphite or phosphonite, with a hydroxylamine derivative accompanied with a sterically hindered amine stabilizer. SOLUTION: This combination of stabilizers of (A) an organic phosphite and phosphonite, [preferably, a compound of the formula (R1 to R3 are each a 1-18C alkyl or the like) or the like], (B) a compound selected from a hydroxylamine derivative and an amine oxide derivative, and (C) a sterically hindered amine stabilizer is used, and the stabilizers are added to a polyolefin. The obtained mixture is charged in a mold, and the mold with the mixture is heated to >=280 deg.C in an oven so that the stabilized polyolefin may be melted. The heated mold is rotated at least around two axes to spread the thermoplastic material on the wall, and the mold with the spread material is cooled while rotating the mold. The cooled mold is opened and the obtained hollow product is taken out from the mold to provide a polyolefin hollow product.
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