公开(公告)号：US20180030233A1

公开(公告)日：2018-02-01

申请号：US15554842

申请日：2016-03-01

Applicant: JSP CORPORATION

Inventor： Yohta KUWADA ,  Mitsushi MURATA

IPC: C08J9/20 ,  C08J9/14 ,  C08J9/232

CPC classification number: C08J9/20 ,  B29C44/3461 ,  B29K2033/12 ,  B29K2105/0085 ,  B29K2105/041 ,  B29K2995/0063 ,  C08J9/141 ,  C08J9/16 ,  C08J9/232 ,  C08J2203/14 ,  C08J2205/044 ,  C08J2333/12

Abstract: Provided are an expanded acrylic resin beads molded article that produces little soot during burning, and has good castabilities and high strength, and an expandable acrylic resin bead and an expanded acrylic resin bead for producing the expanded acrylic resin beads molded article. The expandable acrylic resin bead includes a physical blowing agent and a copolymer. The copolymer is composed of a methyl methacrylate component, an acrylic acid ester component, and a styrene component in a predetermined proportion. The copolymer constitutes a base resin of the expandable acrylic resin beads. The water content of the expandable acrylic resin bead is a 0.5 mass % or less. The expanded acrylic resin bead includes the copolymer and has a bulk density and cell diameters within predetermined ranges, and the expanded acrylic resin beads molded article is produced by in-mold molding of plural expanded beads.