Adeka Corporation

Changsu Son

Kazukiyo Nomura

Tomomasa Tezuka

Provided is a production method that can produce an olefin resin composition having excellent long-term stability and providing a sufficient stabilization effect to the olefin resin composition. This production method is a method of producing an olefin resin composition that contains a polyolefin resin polymerized with, an addition of a mixture of a phenolic antioxidant represented by the following Formula (1) and a phosphite compound represented by the following Formula (2) or (3), and an organoaluminum compound or a mixed solvent of an organoaluminum compound and an organic solvent, to a catalyst system or a polymerization system before or during the polymerization of the olefin monomer.

Production method for stabilized olefin resin composition

Provided are: an olefin-based resin composition that can yield a molded article having excellent transparency in which coloration is inhibited; a method for producing the olefin-based resin composition; and a molded article of the olefin-based resin composition. The olefin-based resin composition contains, with respect to 100 parts by mass of an olefin polymer: 0.001 to 10 parts by mass of one or more compounds (A) represented by Formula (1) wherein Rto Reach independently represent a hydrogen atom or an alkyl group having 1 to 9 carbon atoms; Rrepresents a hydrogen atom or methyl; m represents 1 or 2; and Mrepresents, for example, a hydrogen atom; and 0.001 to 10 parts by mass of a fatty acid metal salt (B) represented by Formula (2) wherein Rrepresents a group having 10 to 30 carbon atoms and introduced from an aliphatic organic acid; n represents 1 or 2; and Mrepresents an alkali metal atom or a multivalent metal inorganic group. In the olefin-based resin composition, an aluminum content in the olefin polymer is 0.01 mol or less per 1 kg of the olefin polymer. 

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Saitama, Japan

Changsu Son