US4461888A
Expired / Lapsed
US
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Substituted birefringent polyhydrazide
Assignee: Polaroid Corp
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Filing: 1983-04-20
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Granted: 1984-07-24
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Expires: 2003-04-20
Abstract
Abstract A class of polyamides comprising recurring units having certain substituted-biphenylene or substituted-stilbene radicals is disclosed. The substituted radicals include substituents so as to confer a non-coplanar molecular configuration and a substantially cylindrical distribution of electron density about the long axis of the recurring units and the chain-extended polymers including such radicals. Molecularly oriented polymers of the invention exhibit optically uniaxial properties. The highly berefringent polymers are suited to applicaiton in optical filter and other devices where a refractive and birefringent material is desired.
Inventors
- 👤 Howard G. Rogers
- 👤 Russell A. Gaudiana
- 👤 Jeannette S. Manello
- 👤 Ronald A. Sahatjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
180 words
A film- or fiber-forming polymer comprising recurring units of the formula ##STR57## wherein R and R 1 are each hydrogen, alkyl, aryl, alkaryl or aralkyl; and A is a divalent radical selected from the group consisting of: ##STR58## where each U is a substituent other than hydrogen, each W is hydrogen or a substituent other than hydrogen, and each p is an integer from 1 to 3, said U and Wp substitution being sufficient to provide the aromatic nuclei of said radical with a noncoplanar molecular configuration with respect to each other, and ##STR59## where each of Y and Z is hydrogen or a substituent other than hydrogen and each t is an integer from 1 to 4, with the proviso that when each said Z is hydrogen, at least one said Y substituent is a substituent other than hydrogen positioned on the corresponding nucleus ortho with respect to the ##STR60## moiety of said radical, said Z and Yt substitution being sufficient to provide the aromatic nuclei of said radical with a non-coplanar molecular configuration with respect to each other.
Claim 2
Dependent Claim
180 words
A film- or fiber-forming polymer comprising recurring units of the formula ##STR57## wherein R and R 1 are each hydrogen, alkyl, aryl, alkaryl or aralkyl; and A is a divalent radical selected from the group consisting of: ##STR58## where each U is a substituent other than hydrogen, each W is hydrogen or a substituent other than hydrogen, and each p is an integer from 1 to 3, said U and Wp substitution being sufficient to provide the aromatic nuclei of said radical with a noncoplanar molecular configuration with respect to each other, and ##STR59## where each of Y and Z is hydrogen or a substituent other than hydrogen and each t is an integer from 1 to 4, with the proviso that when each said Z is hydrogen, at least one said Y substituent is a substituent other than hydrogen positioned on the corresponding nucleus ortho with respect to the ##STR60## moiety of said radical, said Z and Yt substitution being sufficient to provide the aromatic nuclei of said radical with a non-coplanar molecular configuration with respect to each other.
Claim 3
Dependent Claim
74 words
The film- or fiber-forming polymer of claim 1 wherein said divalent radical A is a radical having the formula ##STR61## where each U is a substituent other than hydrogen, each W is hydrogen or a substituent other than hydrogen, and each p is an integer from 1 to 3, said U and W substitution being sufficient to provide the aromatic nuclei of said radical with a noncoplanar molecular configuration with respect to each other.
Claim 4
Dependent Claim
25 words
The film- or fiber-forming polymer of claim 2 wherein each said p is the integer 3 and each of said U and W is halogen.
Claim 5
Dependent Claim
16 words
The film- or fiber-forming polymer of claim 2 wherein each said U and W is fluoro.
Claim 6
Dependent Claim
17 words
The film- or fiber-forming polymer of claim 2 wherein each of R and R 1 is hydrogen.
Claim 7
Dependent Claim
25 words
The film- or fiber-forming polymer of claim 5 wherein said A radical has the formula ##STR62## wherein each U is halo, nitro, alkoxy or substitutedalkyl.
Claim 8
Dependent Claim
13 words
The film- or fiber-forming polymer of claim 6 wherein said substitutedalkyl is trifluoromethyl.
Claim 9
Dependent Claim
26 words
The film- or fiber-forming polymer of claim 2 wherein each said p is the integer 3 and each of said U and W is is fluoro.
Claim 10
Dependent Claim
17 words
The film- or fiber-forming polymer of claim 8 wherein each of R and R 1 is hydrogen.
Claim 11
Dependent Claim
107 words
The film- or fiber-forming polymer of claim 1 wherein said divalent radical A is a radical having the formula ##STR63## where each of Y and Z is hydrogen or a substituent other than hydrogen and each t is an integer from 1 to 4, with the proviso that when each said Z is hydrogen, at least one said Y substituent is a substituent other than hydrogen positioned on the corresponding nucleus ortho with respect to the ##STR64## moiety of said radical, said Z and Y t substitution being sufficient to provide the aromatic nuclei of said radical with a non-coplanar molecular configuration with respect to each other.
Claim 12
Dependent Claim
29 words
The film- or fiber-forming polymer of claim 10 wherein said divalent radical A has the formula ##STR65## wherein at least one of said Y substituents is other than hydrogen.
Claim 13
Dependent Claim
19 words
The film- or fiber-forming polymer of claim 11 wherein at least one said Y substituents is halo or alkoxy.
Claim 14
Dependent Claim
25 words
The film- or fiber-forming polymer of claim 10 wherein said divalent radical A has the formula ##STR66## wherein Z is a substituent other than hydrogen.
Claim 15
Dependent Claim
14 words
The film- or fiber-forming polymer of claim 13 wherein said Z substituent is halo.
Claim 16
Dependent Claim
17 words
The film- or fiber-forming polymer of claim 10 wherein each of R and R 1 is hydrogen.
References Cited (Backward Citations)
US3130182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |