US4196144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic diamines and their use as polycondensation components for the manufacture of polyamide, polyamide-imide and polyimide polymers
Assignee: BASF Corp
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Filing: 1978-11-22
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Granted: 1980-04-01
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Expires: 1998-11-22
Abstract
Abstract New polynuclear aromatic diamines, such as 2,2'-di-(p-aminophenoxy)-biphenyl, a process for their manufacture and their use as polycondensation components for the manufacture of polyamide, polyamide-imide and polyimide polymers are described. The polymers obtained with the aromatic diamines according to the invention are readily soluble and can also be processed from the melt and are distinguished by good thermal, electrical and/or mechanical properties.
Inventors
- 👤 Roland Darms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:22
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/40; C07; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/38; C08G69/02; C08G69/26; C08G69/32; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/105; C08G73/1067; C08G73/1071; C08G73/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
A diamine of the formula ##STR18## in which the two amino groups independently of one another are in the o-, m- or p-position of the benzene ring.
Claim 2
Dependent Claim
27 words
A diamine of the formula ##STR18## in which the two amino groups independently of one another are in the o-, m- or p-position of the benzene ring.
Claim 3
Dependent Claim
27 words
A diamine of the formula (I) according to claim 1, in which the two amino groups are each in the ortho-position or para-position of the benzene ring.
Claim 4
Dependent Claim
9 words
A diamine according to claim 1 which is 2,2'-di-(p-aminophenoxy)biphenyl.
Claim 5
Dependent Claim
9 words
A diamine according to claim 1 which is 2,2'-di-(o-aminophenoxy)-biphenyl.
Claim 6
Dependent Claim
9 words
A diamine according to claim 1 which is 2-(p-aminophenoxy)-2'-(o-aminophenoxy)-biphenyl.
References Cited (Backward Citations)
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GB1030026A
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US3410875A
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US3440215A
Cited
FR1537385A
Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |