US4065441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyamide from arylene diamine and mixture of alkylene dicarboxylic acids
Assignee: Dow Chemical Co
•
Filing: 1976-03-08
•
Granted: 1977-12-27
•
Expires: 1996-03-08
Abstract
Abstract Novel copolyamides having the recurring unit ##STR1## are disclosed wherein x, in 50 percent to 85 percent of the recurring units, is an integer from 6 to 10 inclusive, and, in 15 percent to 50 percent of the recurring units is 4, and Ar is an arylene radical. The copolyamides are characterized by ease of melt processing such as in molding, extruding, and injection molding, while at the same time possessing good physical properties, and being further characterized by their ease of conversion from the amorphous to the crystalline state which, in turn, gives rise to a high degree of versatility in their fabrication.
Inventors
- 👤 Philip S. Andrews
- 👤 William J. Farrissey, Jr.
- 👤 Besir K. Onder
- 👤 James N. Tilley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:34
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
A fiber forming injection moldable copolyamide consisting essentially of the recurring unit. ##STR15## wherein x in 50 percent to 85 percent of the recurring units represents an integer from 6 to 10, inclusive, and in 15 percent to 50 percent of the recurring units x is 4, and Ar is 4,4'-methylenediphenylene.
Claim 2
Dependent Claim
51 words
A fiber forming injection moldable copolyamide consisting essentially of the recurring unit. ##STR15## wherein x in 50 percent to 85 percent of the recurring units represents an integer from 6 to 10, inclusive, and in 15 percent to 50 percent of the recurring units x is 4, and Ar is 4,4'-methylenediphenylene.
Claim 3
Dependent Claim
35 words
A copolyamide according to claim 1 wherein x in 50 percent to 85 percent of the recurring units is 7 and in the remaining 15 to 50 percent of the recurring units x is 4.
Claim 4
Dependent Claim
49 words
A fiber forming copolyamide consisting essentially of the recurring unit ##STR16## wherein x in about 70 percent to about 80 percent of the recurring units represents an integer from 6 to 10, inclusive, and in about 20 percent to about 30 percent of the recurring units x is 4.
Claim 5
Dependent Claim
49 words
A fiber forming copolyamide consisting essentially of the recurring unit ##STR16## wherein x in about 70 percent to about 80 percent of the recurring units represents an integer from 6 to 10, inclusive, and in about 20 percent to about 30 percent of the recurring units x is 4.
Claim 6
Dependent Claim
37 words
A copolyamide according to claim 3 wherein x in about 70 percent to about 80 percent of the recurring units is 7 and in the remaining 20 to 30 percent of the recurring units x is 4.
Claim 7
Dependent Claim
33 words
A copolyamide according to claim 3 wherein x in about 75 percent of the recurring units represents an integer from 6 to 10, inclusive, and in the remaining 25 percent x is 4.
Claim 8
Dependent Claim
32 words
A fiber forming copolyamide consisting essentially of the recurring unit ##STR17## wherein x in about 75 percent of the recurring units is 7 and in the remaining 25 percent x is 4.
Claim 9
Dependent Claim
32 words
A fiber forming copolyamide consisting essentially of the recurring unit ##STR17## wherein x in about 75 percent of the recurring units is 7 and in the remaining 25 percent x is 4.
Claim 10
Dependent Claim
12 words
A copolyamide composition according to claim 1 containing a fibrous reinforcing agent.
References Cited (Backward Citations)
US2244192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |