US 11,655,360 B2
Gas-barrier resin composition and use thereof
Junichi Kuroda, Oita (JP); Yoshikuni Okumura, Oita (JP); Shinya Hayashi, Oita (JP); Masahiro Uematsu, Kanagawa (JP); Takaaki Hattori, Kanagawa (JP); and Yuichiro Yasukawa, Kanagawa (JP)
Assigned to SHOWA DENKO K.K., Tokyo (JP); and JAPAN POLYETHYLENE CORPORATION, Tokyo (JP)
Appl. No. 16/624,055
Filed by SHOWA DENKO K.K., Tokyo (JP); and JAPAN POLYETHYLENE CORPORATION, Tokyo (JP)
PCT Filed Jul. 17, 2018, PCT No. PCT/JP2018/026766
§ 371(c)(1), (2) Date Dec. 18, 2019,
PCT Pub. No. WO2019/021890, PCT Pub. Date Jan. 31, 2019.
Claims priority of application No. JP2017-143454 (JP), filed on Jul. 25, 2017; application No. JP2017-243014 (JP), filed on Dec. 19, 2017; and application No. JP2017-243015 (JP), filed on Dec. 19, 2017.
Prior Publication US 2021/0147669 A1, May 20, 2021
Int. Cl. C08L 29/04 (2006.01); C08L 23/08 (2006.01)
CPC C08L 29/04 (2013.01) [C08L 23/08 (2013.01)] 12 Claims
 
1. A gas-barrier resin composition, comprising: a gas-barrier resin (A) having an oxygen permeability coefficient of 1.0×10−14 (cm3·cm/cm2·s·Pa) or less wherein said gas-barrier resin (A) is a vinyl alcohol-based resin (A1); and a copolymer (B) containing monomer structural units represented by the formula (1), the formula (2), and the formula (3):

OG Complex Work Unit Chemistry
wherein R1 represents a hydrogen atom or a methyl group; R2 represents a hydrocarbon group having 1 to 20 carbon atoms that may be substituted with a halogen atom, a hydroxy group, an alkoxy group, or an amino group; 1, m, and n represent numerical values representing molar proportions of the respective monomer structural units, and n may represent 0; and p represents an integer of from 1 to 4, wherein a ratio of a mass of the copolymer (B) to a total mass of the gas-barrier resin (A) and the copolymer (B) is from 1 mass % to 40 mass %,
wherein, in the copolymer (B), the molar proportion 1 of the monomer structural unit represented by the formula (1), the molar proportion m of the monomer structural unit represented by the formula (2), and the molar proportion n of the monomer structural unit represented by the formula (3) satisfy the following expression:
50≥{(m+n)/(l+m+n)}×100≥5.