US4608429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-melting aromatic polyesters with repeating 2,2'-substituted-biphenylene radicals
Assignee: Polaroid Corp
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Filing: 1984-11-23
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Granted: 1986-08-26
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Expires: 2004-11-23
Abstract
Abstract A class of aromatic polyesters exhibiting melt processability is disclosed. A portion of repeating 2,2'-substituted-biphenylene radicals in an aromatic polyester is replaced by certain other aromatic radicals to provide an aromatic polyester which exhibits low-melting properties, melt processability and melt anisotropy. The aromatic polyesters can be melt processed to films and fibers.
Inventors
- 👤 Howard G. Rogers
- 👤 Russell A. Gaudiana
- 👤 Richard A. Minns
- 👤 Roger F. Sinta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:36
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/191; C08G63/66; C08G63/668; C08G63/672; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
129 words
A melt-processable polyester comprising repeating radicals of the formulas ##STR20## wherein X is a substituent other than hydrogen, and k represents the molar amount of the formula (I) radical in the polyester; ##STR21## wherein Y is hydrogen or a substituent other than hydrogen, and m represents the molar amount of the formula (II) radical in the polyester; ##STR22## wherein each of Y' and Y" represents hydrogen or a substituent other than hydrogen, and n represents the molar amount of the formula (III) radical in the polyester; and ##STR23## wherein Y"' is hydrogen or a substituent other than hydrogen, and p represents the mole ratio of the formula (IV) radical in the polyester; the molar proportions of formula (I), (II), (III) and (IV) radicals conforming to the following relationships: ##EQU2##
Claim 2
Dependent Claim
129 words
A melt-processable polyester comprising repeating radicals of the formulas ##STR20## wherein X is a substituent other than hydrogen, and k represents the molar amount of the formula (I) radical in the polyester; ##STR21## wherein Y is hydrogen or a substituent other than hydrogen, and m represents the molar amount of the formula (II) radical in the polyester; ##STR22## wherein each of Y' and Y" represents hydrogen or a substituent other than hydrogen, and n represents the molar amount of the formula (III) radical in the polyester; and ##STR23## wherein Y"' is hydrogen or a substituent other than hydrogen, and p represents the mole ratio of the formula (IV) radical in the polyester; the molar proportions of formula (I), (II), (III) and (IV) radicals conforming to the following relationships: ##EQU2##
Claim 3
Dependent Claim
21 words
The polyester of claim 1 wherein, in said formula (I) radical, each X group is independently halogen, nitro, alkoxy or substituted-alkyl.
Claim 4
Dependent Claim
14 words
The polyester of claim 2 wherein each of said X groups is a substituted-alkyl.
Claim 5
Dependent Claim
13 words
The polyester of claim 3 wherein each of said X groups is trifluoromethyl.
Claim 6
Dependent Claim
17 words
The polyester of claim 1 wherein, in said formula (II) radical, Y is hydrogen or a substituted-alkyl.
Claim 7
Dependent Claim
10 words
The polyester of claim 5 wherein said Y is hydrogen.
Claim 8
Dependent Claim
10 words
The polyester of claim 5 wherein said Y is trifluoromethyl.
Claim 9
Dependent Claim
18 words
The polyester of claim 1 wherein, in said formula (III) radical, each of Y' and Y" is hydrogen.
Claim 10
Dependent Claim
17 words
The polyester of claim 1 wherein, in said formula (IV) radical, Y"' is hydrogen, halogen or alkyl.
Claim 11
Dependent Claim
9 words
The polyester of claim 9 wherein Y"' is chloro.
Claim 12
Dependent Claim
10 words
The polyester of claim 9 wherein said Y"' is methyl.
Claim 13
Dependent Claim
53 words
The polyester of claim 1 wherein said n is zero, the ratio of k to the sum of k and m is in the molar range of from 0.3 to 0.6, and the ratio of m to the sum of k and m is in the molar range of from 0.3 to 0.6.
Claim 14
Dependent Claim
14 words
The polyester of claim 12 wherein each of said molar ratios is about 0.5.
Claim 15
Dependent Claim
16 words
The polyester of claim 12 wherein, in said formula (I) radical, each X group is trifluoromethyl.
Claim 16
Dependent Claim
14 words
The polyester of claim 14 wherein, in said formula (II) radical, Y is trifluoroalkyl.
Claim 17
Dependent Claim
14 words
The polyester of claim 15 wherein, in said formula (IV) radical, Y' is chloro.
Claim 18
Dependent Claim
14 words
The polyester of claim 15 wherein, in said formula (IV) radical, Y"' is hydrogen.
Claim 19
Dependent Claim
14 words
The polyester of claim 15 wherein, in said formula (IV) radical, Y"' is methyl.
Claim 20
Dependent Claim
14 words
The polyester of claim 14 wherein, in said formula (II) radical, Y is hydrogen.
Claim 21
Dependent Claim
13 words
The polyester of claim 19 wherein, in said formula (IV), Y"' is chloro.
Claim 22
Dependent Claim
15 words
The polyester of claim 1 in the form of a molecularly oriented film or fiber.
Claim 23
Dependent Claim
24 words
A melt-processable polyester comprising repeating units of the formula ##STR24## wherein each subscript represents the molar amount of the respective radical in said polyester.
Claim 24
Dependent Claim
24 words
A melt-processable polyester comprising repeating units of the formula ##STR24## wherein each subscript represents the molar amount of the respective radical in said polyester.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
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