US3725344A
Expired / Lapsed
US
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Crosslinked copolymers of aromatic diaminodiames, aromatic diahydrides and aromatic diamines and method of preparation
Assignee: Individual
•
Filing: 1970-08-12
•
Granted: 1973-04-03
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Expires: 1990-08-12
Abstract
Abstract A novel copolymer is obtained by subjecting (1) an aromatic diaminodiamide compound whose amino group and amide group are bonded to an aromatic nucleus in a meta or para position to each other and whose amide group is a carboxylic acid amide group or a sulfonic acid amide group, (2) an aromatic tetracarboxylic acid dianhydride and (3) an aromatic diamine to reaction at a temperature not higher than 80*C in the presence of an inert solvent. By dehydrating and cross-linking the copolymer by heating to 100*C or higher, a novel, cross-linked copolymer having a good heat and abrasion resistance is obtained. When said dehydrating and cross-linking reaction is carried out in the form of an electric conductor coating, an electric wire having a good insulation effect is obtained.
Inventors
- 👤 Y Miyadera
- 👤 T Masuko
- 👤 H Kawashima
- 👤 T Muroi
- 👤 H Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:24
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G73/1007; C08G73/1042; C08G73/1067; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/307
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A method according to claim 1, wherein (1) the aromatic diaminodiamide compound is at least one member selected from the group consisting of 4,4''-diaminodiphenylether-2,2''-disulfonamide and 4,4''-diaminodiphenylether-2,2''-dicarbonamide, (2) the aromatic tetracarboxylic acid dianhydride is at least one member selected from the group consisting to benzophenonetetracarboxylic acid dianhydride and pyromellitic dianhydride, and (3) the aromatic diamine is at least one member selected from 4,4''-diaminodiphenylether, 4,4''-diaminodiphenylmethane, 4,4''-diaminobenzophenone and paraphenylenediamine.
Claim 2
Dependent Claim
6 words
an aromatic tetracarboxylic acid dianhydride; and
Claim 3
Dependent Claim
52 words
an aromatic diamine the ratio of the diaminodiaMide to the diamine being from 5 : 95 mol per cent to 95 : 5 mol per cent and then heating the resulting reaction product at a temperature not lower than 100*C whereby said reaction product is dehydrated-cross linked thereby producing said cross-linked copolymer.
Claim 4
Dependent Claim
28 words
A method according to claim 2, wherein the aromatic diaminodiamide compound is 4,4''-diaminodiphenylether-2,2''-disulfonamide, the aromatic tetra-carboxylic acid dianhydride is 3,3'',4,4''-tetracarboxylic acid dianhydride, and the aromatic diamine is 4,4''-diaminodiphenylether.
Claim 5
Dependent Claim
34 words
A method according to claim 2, wherein the aromatic diaminodiamide compound is 4,4''-diaminodiphenylether-2,2''-disulfonamide, the aromatic tetracarboxylic acid dianhydride is a mixture of 3,3'',4,4''-benzophenonetetracarboxylic acid dianhydride and pyromellitic dianhydride, and the aromatic diamine is 4,4''-diaminodiphenylether.
Claim 6
Dependent Claim
34 words
A method according to claim 2, wherein the aromatic diaminodiamide compound is 4,4''-diaminodiphenylether-2,2''-dicarbonamide, the aromatic tetracarboxylic acid dianhydride is a mixture of 3,3'',4,4''-benzophenonetetracarboxylic acid dianhydride and pyromellitic dianhydride, and the aromatic diamine is 4,4''-diaminodiphenylether.
Claim 7
Dependent Claim
12 words
A method according to claim 1, wherein Y and Y'' are SO2.
Claim 8
Dependent Claim
12 words
A method according to claim 2, wherein Y and Y'' are SO2.
Claim 9
Dependent Claim
23 words
A crosslinked copolymer obtained by reacting in the presence of an inert solvent at a temperature of more than 80* C the following:
Claim 10
Dependent Claim
70 words
The cross linked copolymer according to claim 8, wherein said aromatic diaminodiamide compound is at least one member selected from the group consisting of 4, 4''-diaminodiphenylether-2,2''-disulfonamide and 4,4''-diaminodiphenylether-2,2''-dicarbonamide, said aromatic tetracarboxylic acid dianhydride is at least one member selected from the group consisting of benzophenonetetracarboxylic acid dianhydride and pyromellitic dianhydride, and said aromatic diamine is at least one member selected from the group consisting of 4,4''-diaminodiphenylether, 4,4''-diaminodiphenylmethane, 4,4''-diaminobenzophenone and paraphenylene-diamine.
Claim 11
Dependent Claim
31 words
The cross linked copolymer according to claim 9, wherein said aromatic diaminodiamide compound is 4,4''-diaminodiphenylether-2,2''-disulfonamide, said aromatic tetracarboxylic acid dianhydride is 3,3'',4,4''-benzophenone-tetracarboxylic acid dianhydride, and said aromatic diamine is 4, 4''-diaminodiphenylether.
Claim 12
Dependent Claim
36 words
The cross linked copolymer according to claim 9, wherein said aromatic diaminodiamide compound is 4,4''-diaminodiphenylether-2,2''-disulfonamide, said aromatic tetracarboxylic acid dianhydride is a mixture of 3,3'',4,4''-benzophenonetratracarboxylic acid dianhydride and pyromellitic dianhydride, and said aromatic diamine is 4,4''-diaminodiphenylether.
Claim 13
Dependent Claim
29 words
The cross linked copolymer according to claim 8, wherein said aromatic diaminodiamide compound is 4,4''-diaminodiphenylether-2,2''-dicarbonamide, said aromatic tetracarboxylic acid dianhydride and pyromellitic dianhydride, and said aromatic diamine is 4,4''-diaminodiphenylether.
Claim 14
Dependent Claim
16 words
The cross linked copolymer according to claim 8, wherein said diaminodiamide compound is an aromatic diaminodisulfonamide.
Claim 15
Dependent Claim
15 words
The cross linked copolymer according claim 9, wherein the aromatic diaminodiamide compound is 4,4''-diaminodiphenylether-2, 2''-disulfonamide.
Claim 16
Dependent Claim
34 words
The cross linked polymer according to claim 8, wherein the amount of tetracarboxylic acid dianhydride used is in a molar amount equal to the total moles of the diaminodiamide compound and the diamine compound.
Claim 17
Dependent Claim
35 words
The cross linked polymer according to claim 9, wherein the amount of tetracarboxylic acid dianhydride used is in a molar amount equal to the total moles of the diamino diamide compound and the diamine compound.
References Cited (Backward Citations)
US3461096A
Cited
US3541054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |