US Patent No. 10,189,980

PROCESS FOR PRODUCING THERMOPLASTIC RESIN COMPOSITION


Patent No. 10,189,980
Issue Date January 29, 2019
Title Process For Producing Thermoplastic Resin Composition
Inventorship Shun Sato, Hiratsuka (JP)
Assignee The Yokohama Rubber Co., Ltd., Tokyo (JP)

Claim of US Patent No. 10,189,980

1. A process for producing a thermoplastic resin composition having a continuous phase comprising (A) an ethylene-vinyl alcohol copolymer and (B) a polyamide resin (B) and a dispersed phase comprising (C) an acid-modified polyolefin elastomer, wherein the process comprising:(I) kneading the ethylene-vinyl alcohol copolymer (A) and the acid-modified polyolefin elastomer (C) to form a kneaded material in which the acid-modified polyolefin elastomer (C) is dispersed in the ethylene-vinyl alcohol copolymer (A), subsequently,
(II) adding the polyamide resin (B) to the kneaded material obtained in step (I) and further kneading them, and subsequently,
(III) adding an end-capping agent (D) for the polyamide resin (B) in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the polyamide resin (B) to a kneaded material obtained in step (II) and melt-kneading them at or above the melting point of the polyamide resin (B).