Adeka Corporation

Daniel Yataro Martin

Naoko Tanji

Toru Haruna

A transparentization agent composition is a mixture containing 100 parts by mass of a dibenzylidene sorbitol compound represented by a general formula (I) having a particle diameter such that dis from 30 &#x3bc;m to 200 &#x3bc;m and 5 to 200 parts by mass of tetrakis[3(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxymethyl]methane, wherein the total for the two components is 50% by mass or more of the mixture. Also disclosed is a method for producing a polypropylene resin composition, including obtaining a polypropylene resin composition in which a dibenzylidene sorbitol compound represented by a general formula (I) having a particle diameter such that dis from 30 &#x3bc;m to 200 &#x3bc;m is incorporated in a polypropylene resin, by kneading a mixture containing 100 parts by mass of the polypropylene resin and 0.05 to 2 parts by mass of the dibenzylidene sorbitol compound by using a biaxial extruder at an extrusion temperature of from 220 to 250&#xb0; C.

Transparentization agent composition containing sorbitol compound and method for producing polypropylene resin composition using this sorbitol compound

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Saitama, Japan

Daniel Yataro Martin