US4429109A
Expired / Lapsed
US
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Polyamides with high glass transition temperatures prepared from N,N'-terephthaloyldi-beta-alanine and a diamine
Assignee: Standard Oil Co
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Filing: 1982-09-15
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Granted: 1984-01-31
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Expires: 2002-09-15
Abstract
Abstract Polyamides containing as much as 50 mole percent nylon-3 units in at least a partially alternating system and exhibiting high glass transition temperatures (Tg) can be prepared from N,N'-terephthaloyldi-beta-alanine and a diamine, such as bis(p-aminocyclohexyl)methane. Properties of such polyamides can be controlled by choice of the diamine and the preparation temperature without loss of the high Tg. The polyamides of this invention exhibit utility in comfort fiber applications.
Inventors
- 👤 Benedict S. Curatolo
- 👤 Gerald P. Coffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:34
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; C08G69/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
51 words
A water insoluble polyamide containing zero to about 50 mole % nylon-3 units in at least a partially alternating structure, exhibiting glass transition temperatures greater than 130° C. and derived by condensation polymerization of a nylon salt of the formula: ##STR12## where R is any aliphatic, aromatic or alicyclic divalent radical.
Claim 2
Dependent Claim
51 words
A water insoluble polyamide containing zero to about 50 mole % nylon-3 units in at least a partially alternating structure, exhibiting glass transition temperatures greater than 130° C. and derived by condensation polymerization of a nylon salt of the formula: ##STR12## where R is any aliphatic, aromatic or alicyclic divalent radical.
Claim 3
Dependent Claim
30 words
The polyamide of claim 1, having the following general formula: ##STR13## where x is the percentage of the first structural unit in the polyamide and x is greater than zero.
Claim 4
Dependent Claim
11 words
The polyamide of claim 2 where X is greater than 50%.
Claim 5
Dependent Claim
24 words
The polyamide of claims 1 or 2 where R is a one or two ring alicyclic divalent radical of 6 to 13 carbon atoms.
Claim 6
Dependent Claim
34 words
The polyamide of claim 4 where R is one of a cyclohexyl radical or a radical of the formula: ##STR14## where X is one of CH 2 , S, O, or SO 2 .
Claim 7
Dependent Claim
12 words
The polyamide of claim 5 where R has the following structure: ##STR15##
Claim 8
Dependent Claim
10 words
An article or fabric comprising the polymer of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |