Patent EP0309259A2 successfully refreshed from Google Patents.
EP0309259A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Immobilized electrolyte membrane and method of preparation thereof
Assignee: Tonen General Sekiyu KK
•
Filing: 1988-09-23
•
Granted: —
•
Expires: 2008-09-23
Abstract
Abstract Disclosed are immobilized electrolyte membranes having a high electric conductivity and a high mechanical strength, where an ionic conductor such as a polymer electrolyte or an ion-exchange resin is immobilized in pores of a porous solid polymer membrane, particularly of polyolefin having a weight average molecular weight of not less than 5 x 10⁵, the porous solid polymer membrane having a thickness of 0.1 µm to 50 µm, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm², and an average permeable pore diameter of 0.001 µm to 0.1 µm.
Inventors
- 👤 Takuji Itoh
- 👤 Kazuo Saeki
- 👤 Koichi Kono
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 03:08
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/14; B01D69/141; B01D69/142; C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2275; C25; C25B; C25B13/00; C25B13/04; C25B13/08; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/489; H01M50/491; H01M50/494; H01M8/00; H01M8/02; H01M8/0289; C08J2327/00; C08J2327/02; C08J2327/12; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
58 words
An electrolyte membrane comprising an ionic conductor immobilized in pores of a porous solid polymer membrane, the porous solid polymer membrane having a thickness of 0.1 um to 50 um, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm², and an average diameter of permeable pores of 0.001 µm to 0.1 µm.
Claim 2
Dependent Claim
58 words
An electrolyte membrane comprising an ionic conductor immobilized in pores of a porous solid polymer membrane, the porous solid polymer membrane having a thickness of 0.1 um to 50 um, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm², and an average diameter of permeable pores of 0.001 µm to 0.1 µm.
Claim 3
Dependent Claim
49 words
A membrane according to claim 1, wherein the porous solid polymer membrane has a thickness of 0.1 µm to 25 µm, a porosity of 60% to 90%, a tensile strength of not less than 500 kg/cm², and an average diameter of permeable pores of 0.005 µm to 0.05 µm.
Claim 4
Dependent Claim
39 words
A membrane according to claim 1 or 2 wherein the porous solid polymer membrane is made of polyolefin, polytetrafuoroethylene or polyfluorovinylidene but is preferably a polyolefin having a weight average molecular weight of not less than 5 x 10⁵.
Claim 5
Dependent Claim
99 words
A membrane according to any preceding claim wherein the ionic conductor is a complex of a polymer selected from the group consisting of:- (a) polyethylene glycol, polyethylene oxide and a polymer containing at least one thereof as a segment, with an alkali metal or alkali earth metal salt or a protonic acid or (b) polypropylene glycol, polypropylene oxide and a polymer containing at least one thereof as a segment, with an alkali metal or alkali earth metal salt or a protonic acid or (c) poly(oxyethylene.oxypropylene)glycol, poly(oxyethylene.oxypropylene)glycol monether and poly(oxyethylene.oxypropylene)glycol diether, with an alkali metal salt or a protonic acid.
Claim 6
Dependent Claim
61 words
An electrolyte membrane comprising a liquid ionic conductor capillary-condensed and immobilized in pores of a porous solid polymer membrane, the porous solid polymer membrane having a thickness of 0.1 µm to 50 µm, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm² and an average diameter of permeable pores of 0.001 µm to 0.1 µm.
Claim 7
Dependent Claim
61 words
An electrolyte membrane comprising a liquid ionic conductor capillary-condensed and immobilized in pores of a porous solid polymer membrane, the porous solid polymer membrane having a thickness of 0.1 µm to 50 µm, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm² and an average diameter of permeable pores of 0.001 µm to 0.1 µm.
Claim 8
Dependent Claim
49 words
A membrane according to claim 5, wherein the porous solid polymer membrane has a thickness of 0.1 µm to 25 µm, a porosity of 60% to 90%, a tensile strength of not less than 500 kg/cm² and an average diameter of permeable pores of 0.005 µm to 0.05 µm.
Claim 9
Dependent Claim
61 words
A membrane according to claim 5 or claim 6 wherein the liquid ionic conductor is a complex of a liquid ether having a surface tension at 20°C of not more than 70 dyne.cm⁻¹ and a contact angle with the porous solid polymer membrane of not more than 90°, with an alkali metal or alkali earth metal salt or a protonic acid.
Claim 10
Dependent Claim
58 words
A membrane according to claim 7, wherein the liquid ionic conductor is a complex of a liquid ether having a surface tension at 20°C of not more than 50 dyne.cm⁻¹ and a contact angle with the porous solid polymer membrane of not more than 70°C, with an alkali metal or alkali earth metal salt or a protonic acid.
Claim 11
Dependent Claim
41 words
A membrane according to any one of claims 5 to 8 wherein the porous solid polymer membrane is made of polyolefin, polytetrafluoroethylene or polyfluorovinylidene but preferably a polyolefin having a weight average molecular weight of not less than 5 x 10⁵.
Claim 12
Dependent Claim
28 words
A membrane according to any one of claims 5 to 9 wherein the membrane has an effective electric resistance at room temperature of not more than 1000 Ω.cm².
Claim 13
Dependent Claim
17 words
A membrane according to claim 10, wherein the effective electric resistance is not more than 500 Ω.cm².
Claim 14
Dependent Claim
58 words
An electrolyte membrane comprising an ion-exchange resin immobilized in pores of a porous solid polymer membrane, the porous solid polymer membrane having a thickness of 0.1 µm to 50 µm, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm² and an average diameter of permeable pores of 0.001 µm to 0.1 µm.
Claim 15
Dependent Claim
58 words
An electrolyte membrane comprising an ion-exchange resin immobilized in pores of a porous solid polymer membrane, the porous solid polymer membrane having a thickness of 0.1 µm to 50 µm, a porosity of 40% to 90%, a tensile strength of not less than 200 kg/cm² and an average diameter of permeable pores of 0.001 µm to 0.1 µm.
Claim 16
Dependent Claim
49 words
A membrane according to claim 12, wherein the porous solid polymer membrane has a thickness of 0.1 µm to 25 µm, a porosity of 60% to 90%, a tensile strength of not less than 500 kg/cm² and an average diameter of permeable pores of 0.005 µm to 0.05 µm.
Claim 17
Dependent Claim
39 words
A membrane according to claim 12 or 13 wherein the porous solid polymer membrane is made of a polyolefin polytetrafluoroethylene or polyfluorovinylidene but preferably is polyolefin, having a weight average molecular weight of not less than 5 x 10⁵.
Claim 18
Dependent Claim
41 words
A membrane according to any one of claims 12 to 14 wherein the ion-exchange resin is selected from the group consisting of (a) cationic and anionic ion-exchange resins of hydrocarbon structure or (b) cationic andf anionic ion-exchange resins of fluorocarbon structure.
Claim 19
Dependent Claim
25 words
A membrane according to any one of claims 12 to 16 wherein the membrane has an effective electric resistance of not more than 1 Ω.cm².
Claim 20
Independent Claim
102 words
A method of preparing an electrolyte membrane having a high electrical conductivity and high mechanical strength comprising:- (a) impregnating, coating or spraying a polymer electrolyte or ion-exchange resin dissolved or dispersed in solvent on to a porous solid polymer membrane followed by, where necessary, removing the solvent therefrom or (b) mixing a solution or a dispersion of a electrolyte with a material for producing a porous polymer membrane followed by forming a membrane or (c) impregnating, coating or spraying a monomer or a soluble precursor of an electrolyte in a porous solid polymer membrane followed by causing a reaction in the pores.
Claim 21
Independent Claim
102 words
A method of preparing an electrolyte membrane having a high electrical conductivity and high mechanical strength comprising:- (a) impregnating, coating or spraying a polymer electrolyte or ion-exchange resin dissolved or dispersed in solvent on to a porous solid polymer membrane followed by, where necessary, removing the solvent therefrom or (b) mixing a solution or a dispersion of a electrolyte with a material for producing a porous polymer membrane followed by forming a membrane or (c) impregnating, coating or spraying a monomer or a soluble precursor of an electrolyte in a porous solid polymer membrane followed by causing a reaction in the pores.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.