THERMOPLASTIC RESIN COMPOSITION FOR COOLING MEDIUM TRANSPORTATION PIPES, AND COOLING MEDIUM TRANSPORTATION PIPE

WIPO Patent Application WO/2021/054058

A1

Provided is a thermoplastic resin composition for cooling medium transportation pipes, which has high barrier performance, is flexible and has good extrusion moldability. A thermoplastic resin composition which comprises a matrix that comprises a thermoplastic resin and a domain that comprises a rubber and is dispersed in the matrix, the thermoplastic resin composition being characterized by having an oxygen permeability coefficient (cm3·mm/(m2·day·mmHg)) of 0.02 or less at 21°C and at a humidity of 0%, and being also characterized in that the melt viscosity of the thermoplastic resin constituting the matrix is 300Pa·s or less at 250°C and at a shear rate of 243.2 s-1, the thermoplastic resin comprises a thermoplastic resin having a melting point or a glass transition temperature of 150°C or higher and a thermoplastic resin having an oxygen permeability coefficient of 0.004 or less or comprises a thermoplastic resin having a melting point or a glass transition temperature of 150°C or higher and an oxygen permeability coefficient of 0.004 or less, and the rubber comprises an isobutylene-based block copolymer and an olefin- or styrene-based polymer having an epoxy group, an amino group, a hydroxyl group, an acid anhydride group or a carboxyl group.

TOMOI SHUSAKU (JP)

PCT/JP2020/031881

March 25, 2021

August 24, 2020

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YOKOHAMA RUBBER CO LTD (JP)

C08K5/09; C08K3/22; C08K5/10; C08K5/20; C08K5/3492; C08L15/00; C08L23/26; C08L53/02; C08L101/00; F16L11/04

WO2012039203A1

2012-03-29

JP2012057127A	2012-03-22
JPH09314752A	1997-12-09
JP2015030754A	2015-02-16
JP2019077742A	2019-05-23

AOKI, Atsushi et al. (JP)

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