	US 12,460,030 B2
	Copolymer
Tatsuya Funaoka, Osaka (JP); Ryouichi Yano, Osaka (JP); and Manabu Fujisawa, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Aug. 3, 2022, as Appl. No. 17/879,922.
Application 17/879,922 is a continuation of application No. PCT/JP2021/004181, filed on Feb. 4, 2021.
Claims priority of application No. 2020-019810 (JP), filed on Feb. 7, 2020.
Prior Publication US 2023/0031459 A1, Feb. 2, 2023
Int. Cl. C08F 214/26 (2006.01)

CPC C08F 214/265 (2013.01)

6 Claims

1. A copolymer consisting essentially of ethylene units, tetrafluoroethylene units, and hexafluoropropylene units,

wherein a molar ratio (Et units/TFE units) of the ethylene (Et) units to the tetrafluoroethylene (TEE) units is 52.0/48.0 to 56.0/44.0, and

a content of the hexafluoropropylene units is 19.0 to 21.0 mol % based on the total monomer units constituting the copolymer.