Patent US3717593A successfully refreshed from Google Patents.
US3717593A
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US
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A composition comprising a 1,2-polyepoxide and piperidine derivitive as curing agent
Assignee: Novartis AG
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Filing: 1971-03-17
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Granted: 1973-02-20
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Expires: 1991-03-17
Abstract
Abstract The new compound 4-amino-3-aminomethylpiperidine is manufactured by hydrogenating 4-amino-3-cyano-1,2,5,6-tetrahydropyridine in a manner which is in itself known. The 4-amino-3-cyano-1,2,5,6tetrahydropyridine used as the starting substance can be obtained by cyclisation of bis-cyanoethylenated ammonia. The new compound 4-amino-3-aminomethylpiperidine represents a valuable curing agent for epoxide resins, and advantageously 0.5 to 1.3 equivalents of nitrogen-bonded active hydrogen atoms of the 4amino-3-aminomethylpiperidine are used per 1 equivalent of epoxide groups of the polyepoxide compound.
Inventors
- 👤 H Zondler
- 👤 W Pfleiderer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:02
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/56; C07D211/58
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
A composition of matter which contains (a) a polyepoxide with an average of more than one 1,2-epoxide group in the molecule and (b) 4-amino-3-aminomethyl-piperidine as the curing agent, said composition containing 0.5 to 1.3 equivalents of nitrogen-bonded active hydrogen atoms of 4-amino-3-aminomethyl-piperidine (b) per 1 equivalent of epoxide groups of the polyepoxide (a).
Claim 2
Dependent Claim
53 words
A composition of matter which contains (a) a polyepoxide with an average of more than one 1,2-epoxide group in the molecule and (b) 4-amino-3-aminomethyl-piperidine as the curing agent, said composition containing 0.5 to 1.3 equivalents of nitrogen-bonded active hydrogen atoms of 4-amino-3-aminomethyl-piperidine (b) per 1 equivalent of epoxide groups of the polyepoxide (a).
Claim 3
Dependent Claim
30 words
A composition as claimed in claim 1, which contains approximately 1.0 equivalent of nitrogen-bonded active hydrogen atoms of 4-amino-3-aminomethyl-piperidine (b) per 1 equivalent of epoxide groups of the polyepoxide (a).
Claim 4
Dependent Claim
20 words
A composition as claimed in claim 1, which contains a polyglycidyl ether of a polyhydric phenol as the polyepoxide (a).
Claim 5
Dependent Claim
18 words
A composition as claimed in claim 3, which contains a polyglycidyl ether of 2,2-bis-(p-hydroxyphenyl)-propane as the polyepoxide (a).
Claim 6
Dependent Claim
20 words
A composition as claimed in claim 1, which contains a polyglycidyl ester of a polycarboxylic acid as the polyepoxide (a).
Claim 7
Dependent Claim
22 words
A composition as claimed in claim 5, which contains the diglycidyl ester of 4-tetrahydrophthalic acid or hexa-hydrophthalic acid as the polyepoxide (1).
Claim 8
Dependent Claim
21 words
A composition as claimed in claim 1, which contains a polyglycidyl ether of a cycloaliphatic polyol as the poly polyepoxide (a).
References Cited (Backward Citations)
US3544590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |