Invention Grant
- Patent Title: Ethylene-vinyl alcohol copolymer composition, melt-forming material, multilayer structure, and multilayer pipe
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Application No.: US16872944Application Date: 2020-05-12
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Publication No.: US11241869B2Publication Date: 2022-02-08
- Inventor: Shintaro Usui , Minako Ikeshita
- Applicant: Mitsubishi Chemical Corporation
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Chemical Corporation
- Current Assignee: Mitsubishi Chemical Corporation
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JPJP2017-224273 20171122
- Main IPC: B32B27/30
- IPC: B32B27/30 ; B32B1/08 ; B32B27/18 ; C08K5/101 ; C08K5/13 ; C08K5/3435 ; F16L9/14
Abstract:
An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an antioxidant; and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition; wherein the weight ratio (B)/(C) of the antioxidant (B) to the sorbic acid ester (C) is 500 to 1,000,000. The resulting ethylene-vinyl alcohol copolymer composition is less susceptible to coloration.
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