申请人:JSP CORPORATION
公开号:US20160053068A1
公开(公告)日:2016-02-25
An expandable composite resin bead containing an organic physical blowing agent and a base resin composed of a composite resin obtained by polymerizing a styrene monomer in a polypropylene resin. The styrene monomer is polymerized in an amount of more than 400 parts by mass and not more than 1900 parts by mass with respect to 100 parts by mass of the polypropylene resin. The composite resin contains xylene solubles to be obtained through xylene solvent Soxhlet extraction of the expandable composite resin bead, the xylene solubles contain acetone solubles to be obtained through dissolution of the xylene solubles into acetone, and the acetone solubles have an absorbance ratio A (D
698
/D
1376
) of an absorbance D
698
to an absorbance D
1376
that are respectively measured at a wavenumber of 698 cm
−1
and 1376 cm
−1
as infrared absorption spectra of the acetone solubles within a range of from 8.5 to 23.
一种可膨胀的复合树脂珠,其中包含有机物理发泡剂和由聚合苯乙烯单体于聚丙烯树脂中获得的复合树脂基料。聚苯乙烯单体的聚合量为100份聚丙烯树脂质量中的400份至1900份之间。复合树脂含有通过对可膨胀的复合树脂珠进行二甲苯溶剂Soxhlet萃取而获得的二甲苯可溶物,该二甲苯可溶物含有通过将二甲苯可溶物溶解于丙酮中而获得的丙酮可溶物,丙酮可溶物在从8.5至23的范围内具有吸收比A(D698/D1376),该吸收比为在波数为698 cm -1和1376 cm -1的范围内测量的丙酮可溶物的红外吸收光谱中吸收D698与吸收D1376的比率。