US3622545A
Expired / Lapsed
US
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High molecular weight aromatic-aliphatic ordered copolyamides
Assignee: EIDP Inc
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Filing: 1969-11-14
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Granted: 1971-11-23
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Expires: 1989-11-14
Abstract
Abstract High molecular weight aromatic-aliphatic ordered copolyamides consisting essentially of repeating structural units corresponding to the formula WHEREIN X and Y are individually selected positive integers and the sum of X+Y is an integer within the range of 4 to 24, inclusive, Z is an integer from 2 to 12, inclusive, and each R is individually selected from the group consisting of hydrogen and a monovalent radical replacement for hydrogen on nuclear carbon which is nonreactive in polyamidation reactions, are prepared. These copolyamides are useful in the preparation of shaped articles (e.g., fibers and films).
Inventors
- 👤 Veronika Foldi
- 👤 Joseph C Shivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:13
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; D; D01; D01F; D01F6/00; D01F6/78; D01F6/80
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
31 words
An aromatic-aliphatic ordered copolyamide as recited in claim 1, wherein R is selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, cyano, nitro, alkylthio, alkysulfonyl, alkylsulfamoyl, and carboalkoxy.
Claim 2
Dependent Claim
20 words
An aromatic-aliphatic ordered copolyamide as recited in claim 1, wherein the sum of X+Y is 8 and Z is 4.
Claim 3
Dependent Claim
20 words
An aromatic-aliphatic ordered copolyamide as recited in claim 1, wherein the sum of X+Y is 12 and Z is 4.
Claim 4
Dependent Claim
20 words
An aromatic-aliphatic ordered copolyamide as recited in claim 1, wherein the sum of X+Y is 23 and Z is 4.
Claim 5
Dependent Claim
20 words
An aromatic-aliphatic ordered copolyamide as recited in claim 1, wherein the sum of X+Y is 12 and Z is 5.
Claim 6
Dependent Claim
11 words
A shaped article of the aromatic-aliphatic copolyamide recited in claim 1.
Claim 7
Dependent Claim
9 words
A shaped article of claim 7 in film form.
Claim 8
Dependent Claim
9 words
A shaped article of claim 7 in fiber form.
Claim 9
Dependent Claim
38 words
A fiber of the aromatic-aliphatic copolyamide recited in claim 1, having a tenacity value in excess of about 3 g.p.d., initial modulus value in excess of about 275 g.p.d., and an orientation angle less than about 35* .
Claim 10
Dependent Claim
38 words
A fiber of the aromatic-aliphatic copolyamide recited in claim 1, having a tenacity value in excess of about 4.5 g.p.d., initial modulus value in excess of about 400 g.p.d., and an orientation angle less than about 25* .
Claim 11
Dependent Claim
54 words
A process for improving tensile properties of a fiber of the aromatic-aliphatic copolyamide of claim 1, comprising applying heat in the temperature range of between about 300* to 600* C. to said fiber for between about 0.1 to 10 seconds in an inert atmosphere, while drawing said fiber from about 0 to 50 percent.
Claim 12
Dependent Claim
18 words
A process as recited in claim 12, wherein said temperature range is between about 400* to 550* C.
References Cited (Backward Citations)
US3296213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |