US4487948A
Expired / Lapsed
US
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Polyglycidyl hindered aromatic amines
Assignee: Shell USA Inc
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Filing: 1983-03-23
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Granted: 1984-12-11
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Expires: 2003-03-23
Abstract
Abstract Polyglycidyl amines having room temperature latency when blended with curing agents and high heat distortion temperatures when cured are derived from hindered aromatic diamines and epihalohydrins. Cured products obtained from these polyglycidyl amines and curing agents are useful in structural composites, film adhesives, molding compounds and the like.
Inventors
- 👤 David A. Shimp
- 👤 Richard B. Graver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3227; C07; C07D; C07D303/00; C07D303/02; C07D303/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
Polyglycidyl amines wherein the amine is a sterically hindered aromatic diamine containing two primary amine groups attached directly to carbon atoms in the aromatic nucleus wherein the carbon atoms are not adjacent to each other, wherein the aromatic diamine is mononuclear or dinuclear, wherein the dinuclear diamine contains one primary amine group attached to each aromatic nucleus and wherein the aromatic nuclei are linked through a methylene bridge, wherein each position ortho to each amine group contains an alkyl substituent having one to three carbon atoms and wherein the polyglycidyl amine contains an epoxide functionality between 3 and 4.
Claim 2
Dependent Claim
99 words
Polyglycidyl amines wherein the amine is a sterically hindered aromatic diamine containing two primary amine groups attached directly to carbon atoms in the aromatic nucleus wherein the carbon atoms are not adjacent to each other, wherein the aromatic diamine is mononuclear or dinuclear, wherein the dinuclear diamine contains one primary amine group attached to each aromatic nucleus and wherein the aromatic nuclei are linked through a methylene bridge, wherein each position ortho to each amine group contains an alkyl substituent having one to three carbon atoms and wherein the polyglycidyl amine contains an epoxide functionality between 3 and 4.
Claim 3
Dependent Claim
21 words
The polyglycidyl amine of claim 1 wherein no more than one position ortho to each amine group contains a methyl substituent.
Claim 4
Dependent Claim
26 words
The polyglycidyl amine of claim 1 wherein at least 3 of the positions ortho to the amine groups contain C 2 or C 3 alkyl substituents.
Claim 5
Dependent Claim
12 words
The polyglycidyl amine of claim 1 wherein the amine is diethyltoluene diamine.
Claim 6
Dependent Claim
11 words
The polyglycidyl amine of claim 1 wherein the amine is methylenebis(2,6-diisopropyl-aniline).
Claim 7
Dependent Claim
12 words
Polyglycidyl diethyltoluene diamine having an epoxide equivalent weight of 101 to 135.
Claim 8
Dependent Claim
12 words
Polyglycidyl diethyltoluene diamine having an epoxide equivalent weight of 101 to 135.
Claim 9
Dependent Claim
11 words
Polyglycidyl methylenebis(2,6-diisopropyl-aniline) having an epoxide equivalent weight of 150 to 200.
Claim 10
Dependent Claim
11 words
Polyglycidyl methylenebis(2,6-diisopropyl-aniline) having an epoxide equivalent weight of 150 to 200.
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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |