公开(公告)号：US20190085160A1

公开(公告)日：2019-03-21

申请号：US16088245

申请日：2016-09-27

Applicant: SEKISUI PLASTICS CO., LTD.

Inventor： Seiichi MORIMOTO

IPC: C08L25/06 ,  C08L23/12 ,  C08J9/18 ,  C08J9/00

Abstract: Antioxidant-containing expandable resin particles including composite resin particles containing 100 to 400 parts by mass of polystyrene-based resin relative to 100 parts by mass of polypropylene-based resin, and a blowing agent and an antioxidant contained in the composite resin particles, wherein the polypropylene-based resin is abundantly present on the surface of the composite resin particles and poorly present at the center of the particles, and the composite resin particles contain 150 to 1500 ppm of antioxidant.