公开(公告)号：US20170275432A1

公开(公告)日：2017-09-28

申请号：US15512222

申请日：2015-08-31

Applicant: SEKISUI PLASTICS CO., LTD.

Inventor： Hiroki OWAKI

IPC: C08J9/18 ,  C08J9/228 ,  C08F255/02 ,  C08L25/06 ,  C08L23/06

CPC classification number: C08J9/18 ,  B60R13/02 ,  C08F255/02 ,  C08J9/0061 ,  C08J9/141 ,  C08J9/228 ,  C08J2201/032 ,  C08J2203/14 ,  C08J2203/182 ,  C08J2323/02 ,  C08J2323/04 ,  C08J2325/06 ,  C08J2423/02 ,  C08J2423/04 ,  C08J2425/06 ,  C08L23/06 ,  C08L23/0815 ,  C08L25/06 ,  C08F112/08 ,  C08F2/22 ,  C08L23/0869

Abstract: Composite resin particles comprising 50 to 800 parts by mass of a polystyrene-based resin with respect to 100 parts by mass of a polyolefin-based resin, wherein: when transmission electron microscope (TEM) images obtained by photographing cross-sections of the composite resin particles using a TEM at a magnification of 1,000 are subjected to a binarization processing and areas in the obtained binarized images which correspond to a cross-sectional area of 437.584 μm2 of the composite resin particles are subjected to image analysis, the polystyrene-based resin satisfies the following requirements: (1) the number of dispersed particles is 180 or more; (2) the maximum of the areas of dispersed particles is 200 μm2 or less; and (3) the coefficient of variation in dispersion is 100% or more, and the composite resin particles exhibit an inner morphology that includes a mixture of sea-island structure regions and co-continuous structure regions.