US4778727A
Expired / Lapsed
US
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Silane coupling agents polyimide-mineral oxide composites
Assignee: Massachusetts Institute of Technology
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Filing: 1987-04-23
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Granted: 1988-10-18
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Expires: 2007-04-23
Abstract
Abstract An adhesion promoter for polyimide is provided having the formula: ##STR1## wherein A is ##STR2## Ar is an aromatic group, R 1 is lower alkyl, R 11 is OR 1 or lower alkyl, R 111 is hydrogen or lower alkyl.
Inventors
- 👤 Giuliana C. Tesoro
- 👤 Donald R. Uhlmann
- 👤 Giovindasamy P. Rajendran
- 👤 Chan E. Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:54
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08; C08K; C08K5/00; C08K5/54; C08K5/544; C08K5/5477; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31721
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A composite product comprising substrates selected from the group consisting of a mineral oxide and a metal adhered to a polyimide with an adhesion promoter positioned between said substrate and said polyimide, said promoter having the formula ##STR30## wherein A is selected from the group consisting of ##STR31## wherein R is a divalent radical having more than two carbon atoms, R 1 is lower alkyl from 1 to 6 carbon atoms, R 11 is OR 1 or lower alkyl from 1 to 6 carbon atoms, R 111 is hydrogen or lower alkyl from 1 to 6 carbon atoms and Ar is an aromatic group.
Claim 2
Dependent Claim
104 words
A composite product comprising substrates selected from the group consisting of a mineral oxide and a metal adhered to a polyimide with an adhesion promoter positioned between said substrate and said polyimide, said promoter having the formula ##STR30## wherein A is selected from the group consisting of ##STR31## wherein R is a divalent radical having more than two carbon atoms, R 1 is lower alkyl from 1 to 6 carbon atoms, R 11 is OR 1 or lower alkyl from 1 to 6 carbon atoms, R 111 is hydrogen or lower alkyl from 1 to 6 carbon atoms and Ar is an aromatic group.
Claim 3
Dependent Claim
10 words
A composite product of claim 1 wherein R is propylene.
Claim 4
Dependent Claim
11 words
A composite product of claim 1 wherein R is ethylaminomethylphenyl ethyl.
Claim 5
Dependent Claim
10 words
A composite product of claim 1 wherein R is phenylene.
Claim 6
Dependent Claim
10 words
A composite product of claim 1 wherein A is phenylene.
Claim 7
Dependent Claim
13 words
A composite product of claim 1 wherein A is derived from phthalic anhydride.
Claim 8
Dependent Claim
11 words
A composite product of claim 1 wherein A is benzophenonetetracarboxylic dianhydride.
Claim 9
Dependent Claim
13 words
A composite product of claim 1 wherein A is derived from pyromellitic anhydride.
Claim 10
Dependent Claim
13 words
A composite product of claim 1 wherein A is derived from 4,4'-carbonyldi-2-carbomethoxybenzoyl halide.
References Cited (Backward Citations)
US3981913A
Cited
US4161477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |