US4841001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Functionalized thermoplastic polymer having dicyclopentadienyl groups in polymer chain
Assignee: General Electric Co
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Filing: 1987-12-16
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Granted: 1989-06-20
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Expires: 2007-12-16
Abstract
Abstract Method for functionalizing a thermoplastic aromatic polycarbonate, copoly(ester carbonate), polyarylate, poly(arylene oxide) or polyarylethersulfone by reacting a precursor polymer that contains dicyclopentadiene with maleic anhydride, and the products so formed.
Inventors
- 👤 Christopher M. Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:39
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; C08G63/00; C08G63/64; C08G63/91; C08G64/00; C08G64/42
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
A thermoplastic polymer having recurring aromatic units in the main chain and end groups of the formula ##STR13## wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, phenyl, an alkyl radical having 1 to 6 carbon atoms, an alkyl substituted phenyl radical having 1 to 14 carbon atoms, chlorine, bromine, an alkoxy radical having 1 to 6 carbon atoms, and cyano; and wherein Y and Z are individually selected from the group consisting of hydroxy, alkoxy, phenoxy and arylamine, and when taken together are an oxygen.
Claim 2
Dependent Claim
92 words
A thermoplastic polymer having recurring aromatic units in the main chain and end groups of the formula ##STR13## wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, phenyl, an alkyl radical having 1 to 6 carbon atoms, an alkyl substituted phenyl radical having 1 to 14 carbon atoms, chlorine, bromine, an alkoxy radical having 1 to 6 carbon atoms, and cyano; and wherein Y and Z are individually selected from the group consisting of hydroxy, alkoxy, phenoxy and arylamine, and when taken together are an oxygen.
Claim 3
Dependent Claim
18 words
The termoplastic polymer of claim 1 comprising the polymeric reaction product of 2,2-bis(4-hydroxyphenyl) propane and a carbonate precursor.
Claim 4
Dependent Claim
23 words
The thermoplastic polymer of claim 2 wherein R 1 and R 2 are hydrogen, and Y and Z taken together are an oxygen.
Claim 5
Dependent Claim
10 words
The thermoplastic polymer of claim 1 comprising a copoly(ester carbonate).
Claim 6
Dependent Claim
13 words
The thermoplastic polymer of claim 4 comprising recurring aromatic units of 2,2-bis(4-hydroxyphenyl propane).
Claim 7
Dependent Claim
23 words
The thermoplastic polymer of claim 5 wherein R 1 and R 2 are hydrogen, and Y and Z taken together are an oxygen.
Claim 8
Dependent Claim
10 words
The thermoplastic polymer of claim 1 which is a polyarylate.
Claim 9
Dependent Claim
13 words
The thermoplastic polymer of claim 7 comprising recurring aromatic units of 2,2-bis(4-hydroxyphenyl propane).
Claim 10
Dependent Claim
23 words
The thermoplastic polymer of claim 8 wherein R 1 and R 2 are hydrogen and Y and Z taken together are an oxygen.
Claim 11
Dependent Claim
10 words
The thermoplastic polymer of claim 1 comprising a poly(arylene oxide).
Claim 12
Dependent Claim
22 words
The thermoplastic polymer of claim 10 wherein R 1 and R 2 are hydrogen, and Y and Z taken together are oxygen.
Claim 13
Dependent Claim
9 words
The thermoplastic polymer of claim 1 comprising a polyarylethersulfone.
Claim 14
Dependent Claim
13 words
The thermoplastic polymer of claim 12 comprising recurring aromatic units of 2,2-bis(4-hydroxyphenyl propane).
Claim 15
Dependent Claim
23 words
The thermoplastic polymer of claim 13 wherein R 1 and R 2 are hydrogen, and Y and Z taken together are an oxygen.
References Cited (Backward Citations)
JPS50116541A
Cited
US4317891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |