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US4361601A
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Method of forming a permionic membrane
Assignee: PPG Industries Ohio Inc
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Filing: 1980-11-17
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Granted: 1982-11-30
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Expires: 2000-11-17
Abstract
Abstract Disclosed is a method of preparing a permionic membrane by contacting the permionic membrane with a plasticizer and an electroconductive material, and hot pressing the permionic membrane, the plasticizer, and the electroconductive material.
Inventors
- 👤 Patrick E. Hillman
- 👤 Preston S. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:30
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2287; C08J5/2293; C25; C25B; C25B9/00; C25B9/17; C25B9/19; C25B9/23; C08J2371/00; C08J2371/08; C08J2371/10; C08J2371/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
In a method of preparing an electrolyte impermeable chlor-alkali cell permionic membrane comprised of a fluorocarbon copolymer having immobile cation selective groups on a fluorocarbon backbone, comprising depositing electroconductive materials chosen from the group consisting of particles of metals, particles of metal compounds, and mixtures thereof on a surface of the permionic membrane, the improvement comprising providing a composition of plasticizer chosen from the group consisting of phthalates, sebacates, adipates, and azelates, and the particles of the electroconductive material on the surface of the permionic membrane, and hot pressing the plasticizer, the particles of electroconductive material, and the permionic membrane, whereby to deposit the electroconductive material in the permionic membrane.
Claim 2
Dependent Claim
110 words
In a method of preparing an electrolyte impermeable chlor-alkali cell permionic membrane comprised of a fluorocarbon copolymer having immobile cation selective groups on a fluorocarbon backbone, comprising depositing electroconductive materials chosen from the group consisting of particles of metals, particles of metal compounds, and mixtures thereof on a surface of the permionic membrane, the improvement comprising providing a composition of plasticizer chosen from the group consisting of phthalates, sebacates, adipates, and azelates, and the particles of the electroconductive material on the surface of the permionic membrane, and hot pressing the plasticizer, the particles of electroconductive material, and the permionic membrane, whereby to deposit the electroconductive material in the permionic membrane.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the plasticizer is substantially non-volatile during hot pressing.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein the plasticizer is capable of substantially immobilizing the electroconductive material during hot pressing.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the plasticizer is hydrolyzed upon hydrolysis of the permionic membrane.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein the plasticizer is a phthalate plasticizer chosen from the group consisting of bis(2-ethyl hexyl) phthalate, dibutyl phthalate, and diisooctyl phthalate.
Claim 7
Dependent Claim
17 words
The method of claim 1 wherein the permionic membrane is in thermoplastic form while being hot pressed.
Claim 8
Dependent Claim
17 words
The method of claim 1 wherein the permionic membrane comprises a fluorocarbon copolymer having carboxylic acid groups.
Claim 9
Dependent Claim
19 words
The method of claim 7 wherein the permionic membrane is in the alkyl ester form while being hot pressed.
Claim 10
Dependent Claim
11 words
The method of claim 1 wherein the electroconductive material is electrocatalytic.
Claim 11
Dependent Claim
15 words
The method of claim 1 wherein the electroconductive material is a substantially non-electrocatalytic, current distributor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |