Patent ID: 9441091
Filing Date: 2016-09-13
CPC Classification: B29C,C08K,C08L

Claim Text:
1. A method of preparing a polypropylene resin composition having a transparentization agent composition incorporated into said polypropylene resin, said method comprising preparing a transparentization agent composition as a mixture comprising two components: 100 parts by mass of a dibenzylidene sorbitol compound represented by the following general formula (I): said compound having a particle diameter such that d 97 is from 30 μm to 200 μm, and 5 to 200 parts by mass of tetrakis[3(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxymethyl] methane, the two components being 50% by mass or more of the mixture forming the transparentization agent composition; and incorporating the transparentization agent composition into said polypropylene resin.