US 11,987,772 B2
Solvent composition
Kanako Osafune, Saitama (JP); Fuyuhiko Sakyu, Saitama (JP); and Michitaka Ootani, Saitama (JP)
Assigned to CENTRAL GLASS COMPANY, LIMITED, Yamaguchi (JP)
Filed by CENTRAL GLASS COMPANY, LIMITED, Yamaguchi (JP)
Filed on Jan. 14, 2021, as Appl. No. 17/149,208.
Application 17/149,208 is a continuation of application No. PCT/JP2019/029391, filed on Jul. 26, 2019.
Claims priority of application No. 2018-141358 (JP), filed on Jul. 27, 2018.
Prior Publication US 2021/0238507 A1, Aug. 5, 2021
Int. Cl. C11D 3/24 (2006.01); B05D 3/00 (2006.01); B08B 3/04 (2006.01); B08B 3/08 (2006.01); C07C 21/18 (2006.01); C08J 7/04 (2020.01); C09D 7/20 (2018.01); C09D 171/00 (2006.01); C11D 7/28 (2006.01); C11D 7/30 (2006.01); C11D 7/50 (2006.01); C11D 9/28 (2006.01)
CPC C11D 7/5018 (2013.01) [B05D 3/007 (2013.01); C08J 7/042 (2013.01); C09D 7/20 (2018.01); C09D 171/00 (2013.01); C11D 7/30 (2013.01); C08J 2333/04 (2013.01); C08J 2355/02 (2013.01); C08J 2369/00 (2013.01); C08J 2471/00 (2013.01); C11D 2111/18 (2024.01)] 9 Claims
 
1. A solvent composition for dissolving a compound having a perfluoropolyether group, comprising: Z-1,2-dichloro-3,3,3-trifluoropropene as a main component,
wherein the compound having a perfluoropolyether group is a compound represented by formula (1) with a weight average molecular weight of 1300 or more and 8000 or less, a compound represented by formula (2) with a weight average molecular weight of 3200 or more and 23000 or less, a compound represented by formula (3) with a weight average molecular weight of 2000 or more and 11000 or less, or a compound represented by formula (4) with a weight average molecular weight of 1000 or more and 20000 or less:
R1—[(OCF(CF3)CF2)m—(OCF2)n]—OR2  (1)
R3—[(OC2F4)p—(OCF2)q]—OR4  (2)
F—(C3F6O)r—R5  (3)
R6O—(CF2O)s—(C2F4O)t—(C3F6O)u—(C4F8O)v—R7  (4)
wherein, in the formula (1), m and n are integers of 1 or more, m+n=8 or more and 120 or less, and R1 and R2 are independently perfluoroalkyl groups having 1 or more and 4 or less carbon numbers,
wherein, in the formula (2), p and q are integers of 1 or more, p+q=25 or more and 350 or less, and R3 and R4 are independently perfluoroalkyl groups having 1 or more and 4 or less carbon numbers,
wherein, in formula (3), r is an integer of 10 or more and 80 or less, and R5 is a perfluoroalkyl group having 1 or more and 4 or less carbon numbers, and
wherein, in formula (4), s, t, u, and v are integers of 1 or more, t/s=2 or more and 5 or less, (u+v)/(s+t+u+v)=0.07 or more and 0.2 or less, s/(s+t+u+v)=0.1 or more and 0.3 or less, and R6 and R7 are independently perfluoroalkyl groups having 1 or more and 4 or less carbon numbers.