US4358582A
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US
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Novel nonaromatic dianhydride and polyimides from tricyclo [4.2.1.02,5 ] nonane-3,4 dimethyl-3,4,7,8-tetracarboxylic acid dianhydride
Assignee: BP Corp North America Inc
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Filing: 1981-08-19
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Granted: 1982-11-09
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Expires: 2001-08-19
Abstract
Abstract Novel polyimides and molding compositions are prepared from novel tricyclo[4.2.1.0 2 ,5 ] nonane-3,4 dimethyl-3,4,7,8-tetracarboxylic acid dianhydride. The dianhydride is useful for the manufacture of polyimides which are useful as engineering plastics.
Inventors
- 👤 Tayseer S. Nimry
- 👤 Ellis K. Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:09
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064; C07; C07C; C07C61/00; C07C61/12; C07C61/125; C07C61/135; C08G73/1042; C08G73/1046; C08G73/105; C08G73/1075; C08G73/1078
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
22 words
A polyimide consisting essentially of the following recurring structure: ##STR6## wherein R is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical.
Claim 2
Dependent Claim
22 words
A polyimide consisting essentially of the following recurring structure: ##STR6## wherein R is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical.
Claim 3
Dependent Claim
17 words
The polyimide of claim 1 wherein R is an aliphatic hydrocarbon from 2 to 18 carbon atoms.
Claim 4
Dependent Claim
17 words
The polyimide of claim 1 wherein R is an aromatic hydrocarbon from 6 to 20 carbon atoms.
Claim 5
Dependent Claim
34 words
The polyimide of claim 1 wherein the aromatic hydrocarbon radical contains from 6 to 10 carbon atoms joined directly or by stable linkage selected from the group consisting essentially of --O--, methylene, ##STR7## radicals.
Claim 6
Dependent Claim
16 words
The polyimide of claim 1 wherein the polyimide is in the form of a molded object.
Claim 7
Dependent Claim
15 words
The polyimide of claim 1 wherein the polyimide is in the form of a fiber.
Claim 8
Dependent Claim
15 words
The polyimide of claim 1 wherein the polyimide is in the form of a film.
Claim 9
Dependent Claim
20 words
The polyimide of claim 1 wherein the polyimide is in the form of a metal coating suitable for electrical service.
Claim 10
Dependent Claim
10 words
A polyimide consisting essentially of the following recurring structure: ##STR8##
Claim 11
Dependent Claim
10 words
A polyimide consisting essentially of the following recurring structure: ##STR8##
Claim 12
Dependent Claim
16 words
A polyimide of claim 9 wherein the polyimide is in the form of a molded object.
Claim 13
Dependent Claim
15 words
The polyimide of claim 9 wherein the polyimide is in the form of a fiber.
Claim 14
Dependent Claim
15 words
The polyimide of claim 9 wherein the polyimide is in the form of a film.
Claim 15
Dependent Claim
10 words
A polyimide consisting essentially of the following recurring structure: ##STR9##
Claim 16
Dependent Claim
10 words
A polyimide consisting essentially of the following recurring structure: ##STR9##
Claim 17
Dependent Claim
16 words
A polyimide of claim 13 wherein the polyimide is in the form of a molded object.
Claim 18
Dependent Claim
15 words
The polyimide of claim 13 wherein the polyimide is in the form of a fiber.
Claim 19
Dependent Claim
15 words
The polyimide of claim 13 wherein the polyimide is in the form of a film.
Claim 20
Dependent Claim
26 words
A copolyimide consisting essentially of the following recurring structure ##STR10## wherein R 1 and R 2 are different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals.
Claim 21
Dependent Claim
26 words
A copolyimide consisting essentially of the following recurring structure ##STR10## wherein R 1 and R 2 are different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals.
Claim 22
Dependent Claim
20 words
The copolyimide of claim 17 wherein R 1 and R 2 are aliphatic hydrocarbons from 2 to 18 carbon atoms.
Claim 23
Dependent Claim
20 words
The copolyimide of claim 17 wherein R 1 and R 2 are aromatic hydrocarbons from 6 to 20 carbon atoms.
Claim 24
Dependent Claim
16 words
The copolyimide of claim 17 wherein the polyimide is in the form of a molded object.
Claim 25
Dependent Claim
36 words
The copolyimide of claim 20 wherein the aromatic hydrocarbon radicals contain from 6 to 10 carbon atoms joined directly or by stable linkage selected from the group consisting essentially of --O--, methylene, ##STR11## and --S-- radicals.
Claim 26
Dependent Claim
15 words
The copolyimide of claim 17 wherein the polyimide is in the form of a fiber.
Claim 27
Dependent Claim
15 words
The copolyimide of claim 17 wherein the polyimide is in the form of a film.
Claim 28
Dependent Claim
24 words
A copolyimide consisting essentially of the following recurring structure: ##STR12## wherein X is a divalent hydrocarbon radical and X' is a tetravalent hydrocarbon radical.
Claim 29
Dependent Claim
24 words
A copolyimide consisting essentially of the following recurring structure: ##STR12## wherein X is a divalent hydrocarbon radical and X' is a tetravalent hydrocarbon radical.
Claim 30
Dependent Claim
18 words
The copolyimide of claim 24 wherein X and X' are aliphatic hydrocarbons from 2 to 18 carbon atoms.
Claim 31
Dependent Claim
18 words
The copolyimide of claim 24 wherein X and X' are aromatic hydrocarbons of 6 to 20 carbon atoms.
References Cited (Backward Citations)
US3649596A
Cited
US3639356A
Cited
US3468852A
Cited
US3856752A
Cited
US4066622A
Cited
US4142036A
Cited
US4271079A
Cited
US4271288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |