Process for producing sulfonic acid group-containing monomer
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsNobuyuki Uematsu, Yasuhiro Nagato, Kaishi Hori, Kenichi Yakigaya
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Abstract
The present disclosure is directed to provide a process capable of producing a sulfonic acid group-containing monomer in a good yield, which can be used as a raw material of fluorine-based polymer electrolytes, such as membranes for fuel cells, catalyst binder polymers for fuel cells, and membranes for chlor-alkali electrolysis. A process for producing a sulfonic acid group-containing monomer represented by the general formula (3) includes the step of mixing and stirring a cyclic compound represented by the general formula (1) and a silanol compound represented by the general formula (2).
Claims7
A process for producing a sulfonic acid group-containing monomer, comprising the step of mixing and stirring the following:
- a cyclic compound represented by the following general formula (1)
- (in the formula (1), X is F or CF3 and n is an integer from 1 to 6, when n is 2 or more, each CFX can be the same or different);
- and
- a silanol compound represented by the following general formula (2)
- R1R2R3Si(OM) (2)
- (in the formula (2), M is an alkali metal or an alkaline earth metal;
- and each of R1 to R3 is independently an optionally substituted hydrocarbon group having a carbon number from 1 to 10, or OM (M is an alkali metal or an alkaline earth metal),
- wherein the sulfonic acid group-containing monomer is represented by the following general formula (3)
- CF2═CFO(CFX)nSO3Y (3)
- (in the formula (3), n and X are the same as n and X in the general formula (1);
- and Y is a hydrogen atom, M, or R1R2R3Si (wherein M and R1 to R3 are the same as M and R1 to R3 in the general formula (2)).
Dependencies are inferred from the claim text.