Patent US2497480A successfully refreshed from Google Patents.
Patent US4417045A successfully refreshed from Google Patents.
US4417045A
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Polyimides and polyimide-amides
Assignee: BP Corp North America Inc
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Filing: 1982-09-29
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Granted: 1983-11-22
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Expires: 2002-09-29
Abstract
Abstract Novel polyimides and polyimides-amides, and molding compositions are prepared from novel dianhydrides such as tricyclo[6.4.0.02,7] dodecane-3,6-diphenyl-1,8,4,5-tetracarboxylic acid dianhydride and tricyclo [6.4.0.02,7] dodecane-1,8,4,5-tetracarboxylic acid dianhydride, dicarboxylic acids and diamines. The novel polyimides and polyimides-amides are useful as engineering plastics.
Inventors
- 👤 Tayseer S. Nimry
- 👤 Ellis K. Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:03
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1042; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721; Y10T428/31725
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
52 words
A polyimide prepared from an aromatic or aliphatic diamine and the dianhydrides of the following structure: ##STR9## wherein Z is either hydrogen or a benzene radical and wherein the mole ratio of the aromatic, aliphatic or a mixture of aromatic and aliphatic diamines to the dianhydride is about 1.2:1 to about 1:1.
Claim 2
Dependent Claim
52 words
A polyimide prepared from an aromatic or aliphatic diamine and the dianhydrides of the following structure: ##STR9## wherein Z is either hydrogen or a benzene radical and wherein the mole ratio of the aromatic, aliphatic or a mixture of aromatic and aliphatic diamines to the dianhydride is about 1.2:1 to about 1:1.
Claim 3
Dependent Claim
84 words
A polyimide-amide prepared from an aliphatic or aromatic dicarboxylic acid, and an aliphatic or aromatic diamine and from the dianhydride of the following structure: ##STR10## wherein Z is either hydrogen or a benzene radical and wherein the mole ratio of the aromatic, aliphatic or a mixture of aromatic and aliphatic diamines to the total dianhydride and dicarboxylic acid moieties is about 1.2:1 to about 1:1 and the mole ratio of the dianhydride moieties to the dicarboxylic acid moieties is about 10:2 to about 2:10.
Claim 4
Dependent Claim
84 words
A polyimide-amide prepared from an aliphatic or aromatic dicarboxylic acid, and an aliphatic or aromatic diamine and from the dianhydride of the following structure: ##STR10## wherein Z is either hydrogen or a benzene radical and wherein the mole ratio of the aromatic, aliphatic or a mixture of aromatic and aliphatic diamines to the total dianhydride and dicarboxylic acid moieties is about 1.2:1 to about 1:1 and the mole ratio of the dianhydride moieties to the dicarboxylic acid moieties is about 10:2 to about 2:10.
Claim 5
Dependent Claim
33 words
A polyimide-amide comprising the following recurring structure: ##STR11## wherein R and R" are the same or different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals and Z is a hydrogen or benzene radical.
Claim 6
Dependent Claim
33 words
A polyimide-amide comprising the following recurring structure: ##STR11## wherein R and R" are the same or different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals and Z is a hydrogen or benzene radical.
Claim 7
Dependent Claim
19 words
The polyimide-amide of claim 3 wherein R" is an aliphatic hydrocarbon from about 2 to about 18 carbon atoms.
Claim 8
Dependent Claim
19 words
The polyimide-amide of claim 3 wherein R" is an aromatic hydrocarbon from about 6 to about 20 carbon atoms.
Claim 9
Dependent Claim
53 words
A polyimide-amide comprising the following recurring structure: ##STR12## wherein R and R" are the same or different divalent aliphatic, cycloaliphatic, araliphatic hydrocarbon radicals and an aromatic hydrocarbon radical containing from 6 to 10 carbon atoms joined directly or by stable linkage consisting of --O--, methylene, ##STR13## --SO--, --SO 2 --, and S radicals.
Claim 10
Dependent Claim
53 words
A polyimide-amide comprising the following recurring structure: ##STR12## wherein R and R" are the same or different divalent aliphatic, cycloaliphatic, araliphatic hydrocarbon radicals and an aromatic hydrocarbon radical containing from 6 to 10 carbon atoms joined directly or by stable linkage consisting of --O--, methylene, ##STR13## --SO--, --SO 2 --, and S radicals.
Claim 11
Dependent Claim
16 words
The polyimide-amide of claim 3 wherein the polyimide-amide is in the form of a molded object.
Claim 12
Dependent Claim
15 words
The polyimide-amide of claim 3 wherein the polyimide-amide is in the form of a fiber.
Claim 13
Dependent Claim
15 words
The polyimide-amide of claim 3 wherein the polyimide-amide is in the form of a film.
Claim 14
Dependent Claim
20 words
The polyimide-amide of claim 3 wherein the polyimide-amide is in the form of a metal coating suitable for electrical service.
Claim 15
Dependent Claim
17 words
The polyimide-amide of claim 3 wherein R is an aliphatic hydrocarbon from 2 to 18 carbon atoms.
Claim 16
Dependent Claim
17 words
The polyimide-amide of claim 3 wherein R is an aromatic hydrocarbon from 6 to 20 carbon atoms.
Claim 17
Dependent Claim
28 words
A polyimide comprising the following recurring structure: ##STR14## wherein R' is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical and Z is a hydrogen or benzene radical.
Claim 18
Dependent Claim
28 words
A polyimide comprising the following recurring structure: ##STR14## wherein R' is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical and Z is a hydrogen or benzene radical.
Claim 19
Dependent Claim
16 words
The polyimide of claim 13 wherein the polyimide is in the form of a molded object.
Claim 20
Dependent Claim
15 words
The polyimide of claim 13 wherein the polyimide is in the form of a laminate.
Claim 21
Dependent Claim
15 words
The polyimide of claim 13 wherein the polyimide is in the form of a film.
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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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |