US 12,286,513 B2
Method for producing fluorine-containing polymer and composition thereof
Yuuki Suzuki, Osaka (JP); Makoto Matsuura, Osaka (JP); Akitoshi Ogata, Osaka (JP); Atsushi Shirai, Osaka (JP); Michiaki Okada, Osaka (JP); Shiomi Ashida, Osaka (JP); Yoshito Tanaka, Osaka (JP); and Yosuke Kishikawa, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Apr. 29, 2022, as Appl. No. 17/733,247.
Application 17/733,247 is a continuation of application No. PCT/JP2020/040007, filed on Oct. 23, 2020.
Claims priority of application No. 2019-199682 (JP), filed on Nov. 1, 2019.
Prior Publication US 2022/0267536 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 79/00 (2006.01)
CPC C08G 79/00 (2013.01) 19 Claims
 
1. A composition comprising:
(A) a fluorine-containing polymer comprising as a main component a structural unit represented by the following formula (A3):

OG Complex Work Unit Chemistry
wherein R6 to R9 each independently represent fluorine, C1-C5 perfluoroalkyl, or C1-C5 perfluoroalkoxy; and
(B) an aprotic solvent,
wherein the fluorine-containing polymer (A) is dissolved in the aprotic solvent (B) and the fluorine-containing polymer (A) dissolved in the aprotic solvent (B) is present in an amount of 20 mass % or more based on the mass of the composition.