Fluorine-containing polymer, cation exchange membrane, and electrolysis vessel
US-2016130710-A1 · May 12, 2016 · US
Ion exchange membrane
US10518258B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10518258-B2 |
| Application number | US-201615575036-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 16, 2016 |
| Priority date | May 18, 2015 |
| Publication date | Dec 31, 2019 |
| Grant date | Dec 31, 2019 |
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Abstract
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The ion exchange membrane according to the present invention comprises a layer A comprising a fluorine-containing polymer having a sulfonic acid group and a layer B comprising a fluorine-containing polymer having a carboxylic acid group, wherein the layer B has a value of an ion cluster diameter distribution M represented by the following formula (B) of greater than 10: M =( a 0 ) 2 /(σ) 2 (B) wherein M represents an ion cluster diameter distribution, a 0 represents an average ion cluster radius, and σ represents a standard deviation of an ion cluster radius.
First claim
Opening claim text (preview).
The invention claimed is: 1. An ion exchange membrane comprising: a layer A comprising a fluorine-containing polymer having a sulfonic acid group; and a layer B comprising a fluorine-containing polymer having a carboxylic acid group, wherein the layer B has a value of an ion cluster diameter distribution M represented by the following formula (B) of greater than 10: M =( a 0 ) 2 /(σ) 2 (B) wherein M represents an ion cluster diameter distribution, a 0 represents an average ion cluster radius, and σ represents a standard deviation of an ion cluster radius. 2. The ion exchange membrane according to claim 1 , wherein the layer B has an ion cluster diameter of from 2.5 to 3.5 nm. 3. The ion exchange membrane according to claim 1 , wherein the layer A has an ion cluster diameter of from 3.0 to 4.5 nm. 4. The ion exchange membrane according to claim 1 , wherein the layer A has a thickness of from 50 to 180 μm. 5. The ion exchange membrane according to claim 1 , wherein the layer B has a thickness of from 5 to 30 μm. 6. The ion exchange membrane according to claim 1 , wherein the layer A comprises a polymer having a sulfonic acid group derived by hydrolysis from a compound represented by the following formula (2); and the layer B comprises a polymer having a carboxylic acid group derived by hydrolysis from a compound represented by the following formula (3): CF 2 ═CF—(OCF 2 CYF) a —O—(CF 2 ) b —SO 2 F formula(2) wherein a represents an integer of 0 to 2, b represents an integer of 1 to 4, and Y represents —F or —CF 3 ; and CF 2 ═CF—(OCF 2 CYF) c —O—(CF 2 ) d —COOR formula(3) wherein c represents an integer of 0 to 2, d represents an integer of 1 to 4, Y represents —F or —CF 3 , and R represents —CH 3 , —C 2 H 5 , or —C 3 H 7 . 7. An electrolytic cell comprising the ion exchange membrane according to claim 1 .
Assignees
Inventors
Classifications
- B01J39/04Primary
Processes using organic exchangers · CPC title
Homopolymers or copolymers of tetrafluoroethylene · CPC title
Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features · CPC title
containing fluorine atoms · CPC title
- C08J5/2237Primary
containing fluorine · CPC title
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- What does patent US10518258B2 cover?
- The ion exchange membrane according to the present invention comprises a layer A comprising a fluorine-containing polymer having a sulfonic acid group and a layer B comprising a fluorine-containing polymer having a carboxylic acid group, wherein the layer B has a value of an ion cluster diameter distribution M represented by the following formula (B) of greater than 10: M =( a 0 ) 2 /(σ) 2…
- Who is the assignee on this patent?
- Asahi Chemical Ind
- What technology area does this patent fall under?
- Primary CPC classification B01J39/04. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Dec 31 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).