US4359568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyaromatic amides containing 1,3-butadiene units
Assignee: United States Department of the Air Force
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Filing: 1981-05-20
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Granted: 1982-11-16
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Expires: 2001-05-20
Abstract
Abstract A process for synthesizing novel polyaromatic amides containing 1,3-butadiene groups along the polymer chain by effecting a reaction between the acid chloride of 1,4-bis-p-carboxyphenyl-1,3-butadiene and an aromatic diamine. These polyamides have been found to be especially useful as laminating resins for a variety of laminating applications.
Inventors
- 👤 Carl S. Marvel
- 👤 Venkatesa Sankaran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:28
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
38 words
A resinous, polyaromatic amide having 1,3-butadiene groups as integral units of the polymer chain and consisting essentially of recurring units having the following structural formula: ##STR13## wherein Ar is a radical selected from the group consisting of ##STR14##
Claim 2
Dependent Claim
38 words
A resinous, polyaromatic amide having 1,3-butadiene groups as integral units of the polymer chain and consisting essentially of recurring units having the following structural formula: ##STR13## wherein Ar is a radical selected from the group consisting of ##STR14##
Claim 3
Dependent Claim
15 words
A resinous, polyaromatic amide in accordance with claim 1 wherein said Ar radical is ##STR15##
Claim 4
Dependent Claim
15 words
A resinous, polyaromatic amide in accordance with claim 1 wherein said Ar radical is ##STR16##
Claim 5
Dependent Claim
15 words
A resinous, polyaromatic amide in accordance with claim 1 wherein said Ar radical is ##STR17##
Claim 6
Dependent Claim
15 words
A resinous, polyaromatic amide in accordance with claim 1 wherein said Ar radical is ##STR18##
Claim 7
Dependent Claim
15 words
A resinous, polyaromatic amide in accordance with claim 1 wherein said Ar radical is ##STR19##
Claim 8
Dependent Claim
87 words
A process for synthesizing a resinous, polyaromatic amide containing 1,3-butadiene groups as integral units of the polymer chain which comprises the steps of (A) forming a reaction mixture between (1) the acid chloride of 1,4-bis-p-carboxyphenyl-1,3-butadiene and (2) an aromatic diamine selected from the group consisting of p-diaminobenzene, m-diaminobenzene, benzidene, bis(4-aminobenzene) sulfone and 4,4-oxydianiline within an atmosphere of nitrogen maintained at a temperature of about 0° C.; (B) allowing said mixture to react for a period of about three hours; and (C) separating the resultant resinous, polyaromatic amide.
Claim 9
Dependent Claim
87 words
A process for synthesizing a resinous, polyaromatic amide containing 1,3-butadiene groups as integral units of the polymer chain which comprises the steps of (A) forming a reaction mixture between (1) the acid chloride of 1,4-bis-p-carboxyphenyl-1,3-butadiene and (2) an aromatic diamine selected from the group consisting of p-diaminobenzene, m-diaminobenzene, benzidene, bis(4-aminobenzene) sulfone and 4,4-oxydianiline within an atmosphere of nitrogen maintained at a temperature of about 0° C.; (B) allowing said mixture to react for a period of about three hours; and (C) separating the resultant resinous, polyaromatic amide.
Claim 10
Dependent Claim
12 words
A process in accordance with claim 7 wherein said diamine is p-diaminobenzene.
Claim 11
Dependent Claim
12 words
A process in accordance with claim 7 wherein said diamine is m-diaminobenzene.
Claim 12
Dependent Claim
12 words
A process in accordance with claim 7 wherein said diamine is benzidene.
Claim 13
Dependent Claim
13 words
A process in accordance with claim 7 wherein said diamine is bis(4-aminobenzene) sulfone.
Claim 14
Dependent Claim
12 words
A process in accordance with claim 7 wherein said diamine is 4,4'-oxydianiline.
References Cited (Backward Citations)
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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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |