US 12,473,421 B2
Ethylene-vinyl alcohol copolymer composition, pellets, and multilayer structure
Shintaro Usui, Tokyo (JP); Daichi Nishimura, Tokyo (JP); and Minako Ikeshita, Tokyo (JP)
Assigned to MITSUBISHI CHEMICAL CORPORATION, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Dec. 13, 2019, as Appl. No. 16/713,624.
Application 16/713,624 is a continuation of application No. PCT/JP2018/024308, filed on Jun. 27, 2018.
Claims priority of application No. 2017-124968 (JP), filed on Jun. 27, 2017.
Prior Publication US 2020/0115522 A1, Apr. 16, 2020
Int. Cl. C08K 3/32 (2006.01); B29B 9/12 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); C08K 5/09 (2006.01)
CPC C08K 3/32 (2013.01) [B29B 9/12 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/306 (2013.01); C08K 5/09 (2013.01); B29K 2023/086 (2013.01); B29K 2105/0044 (2013.01); C08K 2003/328 (2013.01)] 6 Claims
 
1. An ethylene-vinyl alcohol copolymer composition comprising:
(A) an ethylene-vinyl alcohol copolymer;
(B) a compound containing a conjugated polyene structure; and
(C) an iron compound;
wherein the ethylene-vinyl alcohol copolymer (A) is present in an amount that is not less than 70 wt. % based on a total weight of the ethylene-vinyl alcohol copolymer composition,
wherein the compound containing a conjugated polyene structure has a molecular weight of 30 to 500,
wherein the conjugated polyene structure-containing compound (B) is present in an amount of 30 to 1000 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition,
wherein the iron compound (C) is an iron salt selected from the group consisting of iron phosphates, iron sulfates, and iron carboxylates,
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, and
wherein a weight ratio of the amount of the conjugated polyene structure-containing compound (B) to the amount of the iron compound (C) on a metal basis is (conjugated polyene structure-containing compound (B))/(iron compound (C))=1 to 50,000.