公开(公告)号：US20160208068A1

公开(公告)日：2016-07-21

申请号：US15023491

申请日：2014-09-24

Applicant: SEKISUI PLASTICS CO., LTD.

Inventor： Yuichi GONDO ,  Naoya MORISHIMA

IPC: C08J9/18 ,  C08J9/228 ,  C08L25/04

CPC classification number: C08J9/18 ,  C08J9/0061 ,  C08J9/141 ,  C08J9/228 ,  C08J9/232 ,  C08J2201/034 ,  C08J2203/14 ,  C08J2203/182 ,  C08J2325/06 ,  C08J2423/08 ,  C08J2431/04 ,  C08K5/01 ,  C08K5/1535 ,  C08L25/04 ,  C08L25/06 ,  C08L23/0853

Abstract: Polystyrene-based composite resin particles includes 100 to 500 parts by weight of a polystyrene-based resin with respect to 100 parts by weight of an ethylene-vinyl acetate copolymer resin. The polystyrene-based composite resin particles are impregnated with a volatile blowing agent and are pre-expanded to obtain pre-expanded particles; the obtained pre-expanded particles are immersed in tetrahydrofuran for 24 hours to obtain an extract A; and the pre-expanded particles are divided into two halves through the center to prepare halved particles, and the halved particles are immersed in tetrahydrofuran for 24 hours to obtain an extract B; and the obtained extract A and extract B are subjected to a GPC (gel permeation chromatography) measurement and obtain the following results: the polystyrene-based resin having a weight-average molecular weight (Mw) of 100,000 to 500,000 gives a peak obtained from chromatograms for the extract A and for the extract B.

Abstract translation: 聚苯乙烯类复合树脂颗粒相对于100重量份的乙烯 - 乙酸乙烯酯共聚物树脂包含100至500重量份的聚苯乙烯基树脂。 聚苯乙烯类复合树脂颗粒用挥发性发泡剂浸渍并预膨胀以获得预发泡颗粒; 将获得的预发泡颗粒浸入四氢呋喃中24小时以获得提取物A; 将预发泡颗粒通过中心分成两半，以制备半粒子，将半粒子浸入四氢呋喃中24小时以获得提取物B; 将得到的提取物A和提取物B进行GPC（凝胶渗透色谱）测定，得到以下结果：重均分子量（Mw）为100,000〜500,000的聚苯乙烯类树脂得到由色谱图得到的峰 对于提取物A和提取物B.