US4433132A
Expired / Lapsed
US
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Polyesters containing bis(trifluoromethyl)biphenylene radicals
Assignee: Polaroid Corp
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Filing: 1982-09-02
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Granted: 1984-02-21
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Expires: 2002-09-02
Abstract
Abstract A class of polyesters comprising recurring units having certain bis(trifluoromethyl)biphenylene radicals is disclosed. The polyesters exhibit favorable solubility properties in certain organic solvents so as to facilitate the production of the polyesters via polycondensation methods to film- and fiber-forming molecular weights. Monomeric compounds comprising a bis(trifluoromethyl)biphenylene radical and useful for the production of the polyesters are also disclosed.
Inventors
- 👤 Howard G. Rogers
- 👤 Russell A. Gaudiana
- 👤 Richard A. Minns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:53
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
71 words
A polymer comprising recurring units of the formula ##STR33## wherein each of A and B is a divalent organic radical and c is zero or one; and wherein, when c is one, at least one of said A and B divalent organic radicals is a 2,2'-bis(trifluoromethyl) biphenylene radical having the formula ##STR34## and wherein, when c is zero, said divalent organic radical A is a 2,2-bis(trifluoromethyl)biphenylene radical having the aforesaid formula.
Claim 2
Dependent Claim
71 words
A polymer comprising recurring units of the formula ##STR33## wherein each of A and B is a divalent organic radical and c is zero or one; and wherein, when c is one, at least one of said A and B divalent organic radicals is a 2,2'-bis(trifluoromethyl) biphenylene radical having the formula ##STR34## and wherein, when c is zero, said divalent organic radical A is a 2,2-bis(trifluoromethyl)biphenylene radical having the aforesaid formula.
Claim 3
Dependent Claim
12 words
The polymer of claim 1 wherein said c is the integer one.
Claim 4
Dependent Claim
37 words
The polymer of claim 2 wherein one of said A and B divalent organic radicals is a 2,2'-bis(trifluoromethyl) biphenylene radical having the aforesaid formula and the remaining A or B radical is an aliphatic or aromatic radical.
Claim 5
Dependent Claim
20 words
The polymer of claim 3 wherein said remaining A or B radical is a radical having essentially coaxial chain-extending bonds.
Claim 6
Dependent Claim
19 words
The polymer of claim 2 wherein said divalent organic radical A is a 2,2'-bis(trifluoromethyl)biphenylene radical having the aforesaid formula.
Claim 7
Dependent Claim
27 words
The polymer of claim 2 wherein said divalent organic radical A is a 2,2'-bis(trifluoromethyl)biphenylene radical and said divalent organic radical B is an aliphatic or aromatic radical.
Claim 8
Dependent Claim
13 words
The polymer of claim 2 wherein said recurring units have the formula ##STR35##
Claim 9
Dependent Claim
13 words
The polymer of claim 2 wherein said recurring units have the formula ##STR36##
Claim 10
Dependent Claim
13 words
The polymer of claim 2 wherein said recurring units have the formula ##STR37##
Claim 11
Dependent Claim
13 words
The polymer of claim 1 in the form of a film or fiber.
Claim 12
Dependent Claim
18 words
The polymer of claim 10 wherein the film or fiber is a molecularly oriented stretched film or fiber.
Claim 13
Dependent Claim
13 words
The polymer of claim 2 in the form of a film or fiber.
Claim 14
Dependent Claim
18 words
The polymer of claim 11 wherein the film or fiber is a molecularly oriented stretched film or fiber.
Claim 15
Dependent Claim
13 words
The polymer of claim 1 wherein said recurring units have the formula ##STR38##
References Cited (Backward Citations)
US3786022A
Cited
US4083829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |