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US3856752A
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Soluble polyimides derived from phenylindane diamines and dianhydrides
Assignee: Novartis Corp
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Filing: 1973-10-01
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Granted: 1974-12-24
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Expires: 1993-10-01
Abstract
Abstract Polyimides with phenylindane diamines and/or dianhydrides incorporated into the polyimide backbone have been found to be soluble in high concentration in polar organic solvents.
Inventors
- 👤 J Bateman
- 👤 D Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:34
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C07; C07C; C07C15/00; C07C15/40; C07C15/42; C07C15/44; C07C2/00; C07C2/02; C07C2/42; C07C205/00; C07C205/06; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
12 words
A SOLUBLE POLYIMIDE CONSISTING ESSENTIALLY OF THE RECURRING UNIT HAVING THE FORMULA
Claim 2
Dependent Claim
12 words
A SOLUBLE POLYIMIDE CONSISTING ESSENTIALLY OF THE RECURRING UNIT HAVING THE FORMULA
Claim 3
Dependent Claim
28 words
OUT OF THE TOTAL NUMBER OF POLYIMIDE RECURRING UNITS A. 0 TO 100 PERCENT OF SUCH UNITS HAVE Z EQUAL TO A PHENYLINDANE RADICAL OF THE STRUCTURAL FORMULA
Claim 4
Dependent Claim
28 words
OUT OF THE TOTAL NUMBER OF POLYIMIDE RECURRING UNITS A. 0 TO 100 PERCENT OF SUCH UNITS HAVE Z EQUAL TO A PHENYLINDANE RADICAL OF THE STRUCTURAL FORMULA
Claim 5
Dependent Claim
20 words
OUT OF THE TOTAL NUMBER OF Z AND Z'' RADICAL UNITS, AT LEAST 10 PERCENT ARE PHENYLINDANE RADICAL UNITS, AND
Claim 6
Dependent Claim
20 words
OUT OF THE TOTAL NUMBER OF Z AND Z'' RADICAL UNITS, AT LEAST 10 PERCENT ARE PHENYLINDANE RADICAL UNITS, AND
Claim 7
Dependent Claim
20 words
out of the total number of Z and Z'' radical units, at least 10 percent are phenylindane radical units, and
Claim 8
Dependent Claim
20 words
out of the total number of Z and Z'' radical units, at least 10 percent are phenylindane radical units, and
Claim 9
Dependent Claim
13 words
A polyimide of claim 1 wherein the Z radical units are equal to
Claim 10
Dependent Claim
37 words
the polyamide acid, from which the soluble polyimide is produced, has an inherent Viscosity of at least 0.1, measured at 25*C at a concentration of 0.5 percent by weight of the polymer in N,N-dimethylacetamide, N-methylpyrrolidone, or dimethylformamide.
Claim 11
Dependent Claim
37 words
the polyamide acid, from which the soluble polyimide is produced, has an inherent Viscosity of at least 0.1, measured at 25*C at a concentration of 0.5 percent by weight of the polymer in N,N-dimethylacetamide, N-methylpyrrolidone, or dimethylformamide.
Claim 12
Dependent Claim
37 words
THE POLYAMIDE ACID, FROM WHICH THE SOLUBLE POLYIMIDE IS PRODUCED HAS AN INHERENT VISCOSITY OF AT LEAST 0.1 MEASURED AT 25*C AT A CONCENTRATION OF 0.5 PERCENT BY WEIGHT OF THE POLYMER IN N,N-DIMETHYLACETAMIDE, NMETHYLPYRROLIDONE, OR DIMETHYLFORMAMIDE.
Claim 13
Dependent Claim
37 words
THE POLYAMIDE ACID, FROM WHICH THE SOLUBLE POLYIMIDE IS PRODUCED HAS AN INHERENT VISCOSITY OF AT LEAST 0.1 MEASURED AT 25*C AT A CONCENTRATION OF 0.5 PERCENT BY WEIGHT OF THE POLYMER IN N,N-DIMETHYLACETAMIDE, NMETHYLPYRROLIDONE, OR DIMETHYLFORMAMIDE.
Claim 14
Dependent Claim
33 words
A polyimide of claim 2, wherein the Z'' radical units are exclusively equal to a radical of structural formula III and R1, R2, R3, R4 and R5 are as defined in claim 2.
Claim 15
Dependent Claim
48 words
A polyimide of claim 2, wherein 100 to 10 percent of the Z'' radical units are equal to a radical of structural formula III and R1, R2, R3, R4 and R5 are as defined in Claim 17, while 0 to 90 percent of such units are equal to
Claim 16
Dependent Claim
6 words
any mixture of said radical units.
Claim 17
Dependent Claim
6 words
any mixture of said radical units.
Claim 18
Dependent Claim
18 words
A polyimide of claim 2, wherein 0 to 100 percent of the Z radical units are equal to
Claim 19
Dependent Claim
44 words
A polyimide of claim 2, wherein the Z'' radical units are exclusively equal to a radical of structural formula III and R1, R2, R3, R4 and R5 are as defined in claim 2, and the Z radical units are equal to a mixture of
Claim 20
Dependent Claim
16 words
A polyimide of claim 2, wherein the Z'' radical units are equal to a mixture of
Claim 21
Dependent Claim
16 words
A polyimide of claim 2, wherein the Z'' radical units are equal to a mixture of
Claim 22
Dependent Claim
16 words
A polyimide of claim 2, wherein the Z'' radical units are equal to a mixture of
Claim 23
Dependent Claim
13 words
A polimide of claim 2, wherein the Z'' radical units are equal to
Claim 24
Dependent Claim
13 words
A polyimide of claim 2, wherein the Z'' radical units are equal to
Claim 25
Dependent Claim
13 words
A polyimide of claim 2, wherein the Z'' radical units are equal to
Claim 26
Dependent Claim
13 words
A polyimide of claim 2, wherein the Z'' radical units are equal to
Claim 27
Dependent Claim
21 words
A composition of matter which is comprised of a soluble polyimide of formula I of claim 1 in an organic solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |