Patent US4276407A successfully refreshed from Google Patents.
US4276407A
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Acetylene terminated imide oligomers which melt at low temperatures
Assignee: Raytheon Co
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Filing: 1979-08-16
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Granted: 1981-06-30
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Expires: 1999-08-16
Abstract
Abstract Improved diimide and polyimide oligomers containing phenylacetylene terminal groups have been produced which melt at low temperatures and are curable into useful laminating resins, molding compounds and matrix resins. These oligomers are analogous to diimides and polyimides made from conventional dianhydrides, such as benzophenonetetracarboxylic dianhydride or pyromellitic dianhydride.
Inventors
- 👤 Norman Bilow
- 👤 Abraham L. Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:47
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/1003; C08G73/1007; C08G73/101; C08G73/1039; C08G73/1057; C08G73/1064; C08G73/1067; C08G73/1071; C08G73/1075
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
169 words
A phenylacetylene terminated imide oligomer having the structure ##STR15## where X is O, S, CH 2 , SO 2 , CO, or C(CF 3 ) 2 , Ar is a tetravalent organic moiety having the structure ##STR16## R is a divalent organic moiety having the structure ##STR17## wherein X' is O, S, >C(CF 3 ) 2 , CO, or CH 2 , Y is O, S, >C(CF 3 ) 2 , CO, or CH 2 , m is at least 1, Z is S, O, CH 2 , >C(CF 3 ) 2 , >C(CH 3 ) 2 , CO, SO 2 , C 6 H 4 , --C 6 H 4 --Y'--C 6 H 4 --, or --Y'--C 6 H 4 --Y'--C 6 H 4 --Y' wherein Y' is S, O, CH 2 , >C(CF 3 ) 2 , >C(CH 3 ) 2 , SO 2 or mixtures thereof and where n ranges from 0 to 4, n' ranges from 0 to 4, m' ranges from 0 to 2.
Claim 2
Dependent Claim
169 words
A phenylacetylene terminated imide oligomer having the structure ##STR15## where X is O, S, CH 2 , SO 2 , CO, or C(CF 3 ) 2 , Ar is a tetravalent organic moiety having the structure ##STR16## R is a divalent organic moiety having the structure ##STR17## wherein X' is O, S, >C(CF 3 ) 2 , CO, or CH 2 , Y is O, S, >C(CF 3 ) 2 , CO, or CH 2 , m is at least 1, Z is S, O, CH 2 , >C(CF 3 ) 2 , >C(CH 3 ) 2 , CO, SO 2 , C 6 H 4 , --C 6 H 4 --Y'--C 6 H 4 --, or --Y'--C 6 H 4 --Y'--C 6 H 4 --Y' wherein Y' is S, O, CH 2 , >C(CF 3 ) 2 , >C(CH 3 ) 2 , SO 2 or mixtures thereof and where n ranges from 0 to 4, n' ranges from 0 to 4, m' ranges from 0 to 2.
Claim 3
Dependent Claim
9 words
An oligomer of claim 1 wherein n' is 1.
Claim 4
Dependent Claim
11 words
An oligomer of claim 2 wherein n is 0 or 1.
Claim 5
Dependent Claim
13 words
An oligomer of claim 3 wherein m' is 2 and Z is O.
Claim 6
Dependent Claim
13 words
An oligomer of claim 4 wherein X' is O and Y is S.
Claim 7
Dependent Claim
9 words
An oligomer of claim 1 wherein n' is 0.
Claim 8
Dependent Claim
15 words
An oligomer of claim 6 wherein n is 0 or 1 and X is O.
Claim 9
Dependent Claim
16 words
An oligomer of claim 6 wherein n is 1, X is O, and Y is S.
Claim 10
Dependent Claim
75 words
A phenylacetylene terminated imide oligomer having the structure ##STR18## where n ranges from 0 to 4, X is O, S, CH 2 , SO 2 , CO or >C(CF 3 ) 2 and Ar is a telravalent organic moiety having the structure ##STR19## wherein m is at least 1, X' is O, S, >C(CF 3 ) 2 , CO or CH 2 and Y is O, S, >C(CF 3 ) 2 or CH 2 .
Claim 11
Dependent Claim
75 words
A phenylacetylene terminated imide oligomer having the structure ##STR18## where n ranges from 0 to 4, X is O, S, CH 2 , SO 2 , CO or >C(CF 3 ) 2 and Ar is a telravalent organic moiety having the structure ##STR19## wherein m is at least 1, X' is O, S, >C(CF 3 ) 2 , CO or CH 2 and Y is O, S, >C(CF 3 ) 2 or CH 2 .
Claim 12
Dependent Claim
13 words
An oligomer of claim 9 wherein n is 1 and X is O.
Claim 13
Dependent Claim
13 words
An oligomer of claim 10 wherein X' is O and Y is S.
Claim 14
Dependent Claim
17 words
An oligomer of claim 10 wherein X' is O and Y is >C(CF 3 ) 2 .
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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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |