US 12,404,387 B2
Production method for fluoropolymer, surfactant for polymerization, and use of surfactant
Taketo Kato, Osaka (JP); Satoru Yoneda, Osaka (JP); Manabu Fujisawa, Osaka (JP); Kazuya Asano, Osaka (JP); Takahiro Kitahara, Osaka (JP); Masahiro Higashi, Osaka (JP); Akiyoshi Yamauchi, Osaka (JP); Sumi Ishihara, Osaka (JP); Yosuke Kishikawa, Osaka (JP); Shinnosuke Nitta, Osaka (JP); Marina Nakano, Osaka (JP); Hirotoshi Yoshida, Osaka (JP); Yoshinori Nanba, Osaka (JP); Kengo Ito, Osaka (JP); Chiaki Okui, Osaka (JP); Hirokazu Aoyama, Osaka (JP); Masamichi Sukegawa, Osaka (JP); Taku Yamanaka, Osaka (JP); Hiroyuki Sato, Osaka (JP); Yuuji Tanaka, Osaka (JP); Kenji Ichikawa, Osaka (JP); and Yohei Fujimoto, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Feb. 15, 2022, as Appl. No. 17/672,013.
Application 17/672,013 is a division of application No. 16/498,849, granted, now 11,279,814, previously published as PCT/JP2018/013605, filed on Mar. 30, 2018.
Claims priority of application No. 2017-073083 (JP), filed on Mar. 31, 2017; and application No. 2018-020461 (JP), filed on Feb. 7, 2018.
Prior Publication US 2022/0169830 A1, Jun. 2, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08K 5/41 (2006.01); C08F 14/26 (2006.01); C08K 5/098 (2006.01)
CPC C08K 5/41 (2013.01) [C08F 14/26 (2013.01); C08K 5/098 (2013.01); C08F 2800/10 (2013.01); C08K 2201/014 (2013.01)] 11 Claims
 
1. A surfactant for polymerization, comprising at least one selected from the group consisting of:
a surfactant (a) represented by the following formula (a):

OG Complex Work Unit Chemistry
wherein
R1a is a linear or branched alkyl group containing one or more carbon atoms or a cyclic alkyl group containing three or more carbon atoms, with a hydrogen atom that binds to a carbon atom therein being optionally replaced by a hydroxy group or a monovalent organic group that contains an ester bond, optionally contains a carbonyl group when containing two or more carbon atoms, and optionally contains a monovalent or divalent heterocycle or optionally forms a ring when containing three or more carbon atoms;
R2a and R3a are each individually a single bond or a divalent linking group;
R1a, R2a, and R3a contain six or more carbon atoms in total;
Xa is H, a metal atom, NR4a4, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent, where R4as are each H or an organic group and are the same as or different from each other; and
any two of R1a, R2a, and R3a optionally bind to each other to form a ring; and
a surfactant (b) represented by the following formula (b):

OG Complex Work Unit Chemistry
wherein
R1b is a C1-C10 linear alkyl group free from a substituent;
R2b and R4b are each individually H or a substituent;
R3b is a C1-C10 alkylene group optionally containing a substituent;
n is an integer of 1 or greater;
p and q are each individually an integer of 0 or greater;
Xb is H, a metal atom, NR5b4, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent, where R5bs are each H or an organic group and are the same as or different from each other;
any two of R1b, R2b, R3b, and R4b optionally bind to each other to form a ring; and
L is a single bond, —CO2—B—*, —OCO—B—*, —CONR6b—B—*, —NR6bCO—B—*, or —CO— other than the carbonyl groups in —CO2—B—, —OCO—B—, —CONR6b—B—, and —NR6CO—B—, where B is a single bond or a C1-C10 alkylene group optionally containing a substituent, R6b is H or a C1-C4 alkyl group optionally containing a substituent, and * indicates the bond to —OSO3Xb in the formula.