公开(公告)号：US20180236704A1

公开(公告)日：2018-08-23

申请号：US15753217

申请日：2016-08-12

Applicant: KURARAY CO., LTD.

Inventor： Shinya OSHITA ,  Yosuke JOGO ,  Yoshio HIRAYAMA

IPC: B29C47/38 ,  C08F279/02 ,  C08L23/22 ,  C08L9/00 ,  C08F210/12

CPC classification number: B29C48/395 ,  B29B7/48 ,  B29B7/60 ,  B29B7/726 ,  B29C48/385 ,  B29C48/387 ,  B29C48/388 ,  B29C48/52 ,  C08F2/06 ,  C08F4/48 ,  C08F8/04 ,  C08F210/12 ,  C08F236/08 ,  C08F279/02 ,  C08F297/046 ,  C08F2500/02 ,  C08J3/005 ,  C08J2353/00 ,  C08J2423/22 ,  C08L9/00 ,  C08L23/22 ,  C08L53/025 ,  C08L23/142 ,  C08L23/12 ,  C08F212/08

Abstract: Provided is a method in which a polyisobutylene having a peak top molecular weight (Mp) of 5,000 to 80,000 is easily supplied to a hydrogenated block copolymer to stably produce a thermoplastic polymer composition. Specifically, provided is a method for producing a thermoplastic polymer composition containing a hydrogenated block copolymer (a) and a polyisobutylene (b) having a peak top molecular weight (Mp) of 5,000 to 80,000 expressed in terms of standard polystyrene as determined by gel permeation chromatography, the method including a following first step and a following second step.First step: a step of supplying the polyisobutylene (b) to a twin-screw/single-screw extruder of a counter-rotating type, to plasticize the polyisobutylene (b).Second step: a step including a following step (i) and a following step (ii): (i) a step of supplying the hydrogenated block copolymer (a) to a twin-screw extruder; and (ii) a step of supplying the polyisobutylene (b) plasticized in the first step to the twin-screw extruder via a quantitative pump and kneading the polyisobutylene (b) together with the hydrogenated block copolymer (a) supplied in the step (i).