US4158649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric membranes which contain polyphenylquinoxalines and which are useful as battery separators
Assignee: United States Department of the Navy
•
Filing: 1977-10-17
•
Granted: 1979-06-19
•
Expires: 1997-10-17
Abstract
Abstract A polymeric membrane composed of a homogenous mixture of (1) a hydrophilicesin which is (a) partially acetylated cellulose in which from about 50 to less than 100 percent of the hydroxyl groups are acetylated, (b) polyvinyl acetate, (c) hexadimethrine bromide, or mixtures thereof, and (2) a polyphenylquinoxaline of the formula ##STR1## WHEREIN X IS A DIRECT BOND, ##STR2## and Ar is m-phenylene, p-phenylene, or ##STR3## wherein z is a direct bond, ##STR4## and wherein n is a value such that the polyphenylquinoxaline has an inherent viscosity of from about 0.5 to about 2.5 dl./g as a 0.5 g in 100 ml solution in 98 percent sulfuric acid at about 30° C. These polymeric membranes are used as separators in alkaline cells such as silver-zinc cells.
Inventors
- 👤 Isaac Angres
- 👤 James V. Duffy
- 👤 Sol J. Matesky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:37
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/58; B01D71/62; C; C08; C08L; C08L79/00; C08L79/04; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/429; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
155 words
A polymeric membrane comprising a homogeneous mixture of: (1) from about 30 to about 50 weight percent of a hydrophilic resin which is selected from the group consisting of (a) a partially acetylated cellulose in which from about 50 to less than 100 percent of the hydroxyl groups are acetylated, (b) polyvinyl acetate, (c) hexadimethrine bromide, and (d) mixtures thereof; and (2) from about 50 to about 70 weight percent of a polyphenylquinoxaline of the formula ##STR14## wherein X is selected from the group consisting of a direct bond, ##STR15## wherein Ar is selected from the group consisting of m-phenylene, p-phenylene, and ##STR16## wherein Z is selected from the group consisting of a direct bond, ##STR17## and wherein n has a value such that the polyphenylquinoxaline has an inherent viscosity of from about 0.5 to about 2.5 dl./g. as a 0.5 g. in 100 ml solution in 98 percent sulfuric acid at about 30° C.
Claim 2
Dependent Claim
155 words
A polymeric membrane comprising a homogeneous mixture of: (1) from about 30 to about 50 weight percent of a hydrophilic resin which is selected from the group consisting of (a) a partially acetylated cellulose in which from about 50 to less than 100 percent of the hydroxyl groups are acetylated, (b) polyvinyl acetate, (c) hexadimethrine bromide, and (d) mixtures thereof; and (2) from about 50 to about 70 weight percent of a polyphenylquinoxaline of the formula ##STR14## wherein X is selected from the group consisting of a direct bond, ##STR15## wherein Ar is selected from the group consisting of m-phenylene, p-phenylene, and ##STR16## wherein Z is selected from the group consisting of a direct bond, ##STR17## and wherein n has a value such that the polyphenylquinoxaline has an inherent viscosity of from about 0.5 to about 2.5 dl./g. as a 0.5 g. in 100 ml solution in 98 percent sulfuric acid at about 30° C.
Claim 3
Dependent Claim
31 words
The polymeric membrane of claim 1 wherein the hydrophilic resin is a partially acetylated cellulose in which from about 50 to less than 100 percent of the hydroxyl groups are acetylated.
Claim 4
Dependent Claim
13 words
The polymeric membrane of claim 2 wherein the hydrophilic resin is cellulose triacetate.
Claim 5
Dependent Claim
13 words
The polymeric membrane of claim 2 wherein the hydrophilic resin is cellulose acetate.
Claim 6
Dependent Claim
13 words
The polymeric membrane of claim 1 wherein the hydrophilic resin is polyvinyl acetate.
Claim 7
Dependent Claim
13 words
The polymeric membrane of claim 1 wherein the hydrophilic resin is hexadiamethrine bromide.
Claim 8
Dependent Claim
12 words
The polymeric membrane of claim 1 wherein X is a direct bond.
Claim 9
Dependent Claim
10 words
The polymeric membrane of claim 1 wherein X is O.
Claim 10
Dependent Claim
10 words
The polymeric membrane of claim 1 wherein X is C═O.
Claim 11
Dependent Claim
10 words
The polymeric membrane of claim 1 wherein X is O═S═O.
Claim 12
Dependent Claim
10 words
The polymeric membrane of claim 1 wherein Ar is m-phenylene.
Claim 13
Dependent Claim
10 words
The polymeric membrane of claim 1 wherein Ar is p-phenylene.
Claim 14
Dependent Claim
23 words
The polymeric membrane of claim 1 wherein Ar is ##STR18## wherein Z is selected from the group consisting of a direct bond, ##STR19##
Claim 15
Dependent Claim
12 words
The polymeric membrane of claim 13 wherein Z is a direct bond.
Claim 16
Dependent Claim
10 words
The polymeric membrane of claim 13 wherein Z is O.
Claim 17
Dependent Claim
10 words
The polymeric membrane of claim 13 wherein Z is C═O.
Claim 18
Dependent Claim
10 words
The polymeric membrane of claim 13 wherein Z is O═S═O.
Claim 19
Dependent Claim
33 words
The polymeric membrane of claim 1 wherein the hydrophilic resin constitutes from 40 to 50 weight percent of the membrane and the polyphenylquinoxaline constitutes from 50 to 60 weight percent of the membrane.
Claim 20
Dependent Claim
31 words
The polymeric membrane of claim 18 wherein the hydrophilic resin is a partially acetylated cellulose in which from about 50 to less than 100 percent of the hydroxyl groups are acetylated.
Claim 21
Dependent Claim
13 words
The polymeric membrane of claim 19 wherein the hydrophilic resin is cellulose triacetate.
Claim 22
Dependent Claim
13 words
The polymeric membrane of claim 19 wherein the hydrophilic resin is cellulose acetate.
Claim 23
Dependent Claim
13 words
The polymeric membrane of claim 18 wherein the hydrophilic resin is polyvinyl acetate.
Claim 24
Dependent Claim
13 words
The polymeric membrane of claim 18 wherein the hydrophilic resin is hexadimethrine bromide.
Claim 25
Dependent Claim
12 words
The polymeric membrane of claim 18 wherein X is a direct bond.
Claim 26
Dependent Claim
10 words
The polymeric membrane of claim 18 wherein X is O.
Claim 27
Dependent Claim
10 words
The polymeric membrane of claim 18 wherein X is C═O.
Claim 28
Dependent Claim
10 words
The polymeric membrane of claim 18 wherein X is O═S═O.
Claim 29
Dependent Claim
10 words
The polymeric membrane of claim 18 wherein Ar is m-phenylene.
Claim 30
Dependent Claim
10 words
The polymeric membrane of claim 18 wherein Ar is p-phenylene.
Claim 31
Dependent Claim
23 words
The polymeric membrane of claim 18 wherein Ar is ##STR20## wherein Z is selected from the group consisting of a direct bond, ##STR21##
Claim 32
Dependent Claim
12 words
The polymeric membrane of claim 30 wherein Z is a direct bond.
Claim 33
Dependent Claim
10 words
The polymeric membrane of claim 30 wherein Z is O.
Claim 34
Dependent Claim
10 words
The polymeric membrane of claim 30 wherein Z is C═O.
Claim 35
Dependent Claim
10 words
The polymeric membrane of claim 30 wherein Z is O═S═O.
References Cited (Backward Citations)
US2317711A
Cited
US2542527A
Cited
US2676929A
Cited
US3629161A
Cited
US3766141A
Cited
US3875270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |