The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2025
Filed:
Aug. 24, 2020
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Shusaku Tomoi, Hiratsuka, JP;
THE YOKOHAMA RUBBER CO., LTD., Tokyo, JP;
Abstract
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 (cm·mm/(m·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 300 Pa·s or less at 250° C. and at a shear rate of 243.2 s, 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.