US 11,746,201 B2
Gas barrier polymer and gas barrier laminate using same
Kenji Odagawa, Sodegaura (JP); Shingo Suzuki, Koga (JP); and Eiichi Moriya, Koga (JP)
Assigned to MITSUI CHEMICALS TOHCELLO, INC., Tokyo (JP)
Appl. No. 17/418,301
Filed by MITSUI CHEMICALS TOHCELLO, INC., Tokyo (JP)
PCT Filed Dec. 23, 2019, PCT No. PCT/JP2019/050381
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2020/137982, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-243757 (JP), filed on Dec. 26, 2018.
Prior Publication US 2022/0089825 A1, Mar. 24, 2022
Int. Cl. C08J 7/048 (2020.01); C08F 20/06 (2006.01); C08G 73/02 (2006.01); B29C 71/02 (2006.01)
CPC C08J 7/048 (2020.01) [C08F 20/06 (2013.01); C08G 73/0206 (2013.01); C08J 7/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A gas barrier polymer formed by heat-curing a mixture including polycarboxylic acid and a polyamine compound,
wherein, in an infrared absorption spectrum of the gas barrier polymer, when a straight line connecting a measurement point at 1493 cm−1 and a measurement point at 1780 cm−1 is set as a baseline, an absorption intensity at 1660 cm−1 is set as I(1660), and an absorption intensity at 1625 cm−1 is set as I(1625),
R represented by Equation (1) is greater than 1,
R=I(1660)/I(1625)−{−0.65×(total amine/COOH)+0.4225}  (1)
in Equation (1), “total amine” is a total number of moles of primary, secondary, and tertiary amino groups included in the polyamine compound in the mixture, and “COOH” is the number of moles of —COOH groups included in the polycarboxylic acid in the mixture,
wherein a weight average molecular weight of the polycarboxylic acid is equal to or more than 5×105 and equal to or less than 2×106, and
wherein (total of the number of moles of —NH groups and the number of moles of —NH2 groups included in the polyamine compound in the mixture)/(the number of moles of —COOH groups included in the polycarboxylic acid in the mixture) is 0.28 to 0.42.