Back to results
US 11,535,723 B2Granted
Ethylene-vinyl alcohol copolymer composition, pellets, multilayer structure, and multilayer pipe
AssigneeMitsubishi Chemical Corporation
InventorsShintaro Usui, Daichi Nishimura, Minako Ikeshita
Life of this patent
Estimating the term…
Abstract
An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an antioxidant; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition. The ethylene-vinyl alcohol copolymer composition is excellent in degradation resistance.
Claims6
An ethylene-vinyl alcohol copolymer composition comprising:
- (A) an ethylene-vinyl alcohol copolymer having an ethylene structural unit content of 20 to 60 mol %;
- (B) an antioxidant;
- and
- (C) an iron compound;
- wherein the antioxidant (B) is present in an amount of 100 to 30,000 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition;
- wherein the iron compound (C) is present in an amount of 0.01 to 0.8 ppm on a metal basis based on a weight of the ethylene-vinyl alcohol copolymer composition;
- and
- wherein a weight ratio of the amount of the antioxidant (B) to the amount of the iron compound (C) on a metal basis is (Antioxidant (B))/(Iron compound (C))=500 to 50,000.
5 more elements
Dependencies are inferred from the claim text.