US4140658A
Expired / Lapsed
US
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Cyanamides of secondary amines as epoxy curing agents
Assignee: BASF Corp
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Filing: 1978-01-03
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Granted: 1979-02-20
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Expires: 1998-01-03
Abstract
Abstract Curable compositions are prepared comprising a polyepoxide compound, and as a curing agent, a cyanamide of a secondary amine. The curable compositions may be applied as a one package system and they are useful as laminating, surface coating resins, sintering powders, molding resins and adhesives.
Inventors
- 👤 Raymond Seltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:28
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
A curable composition of matter which consists essentially of (a) a 1,2-polyepoxide compound with an average of more than one epoxide group in the molecule and (b) as a curing agent; a cyanamide of the formula ##STR6## wherein R is an organic radical of valency n which may contain up to 30 carbon atoms; and n represents a number at least equal to 2; R 1 is alkyl of 1 to 6 carbon atoms, aryl of 6 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, alkaryl of 7 to 15 carbon atoms, cycloalkyl of 5 or 6 carbon atoms, or a 5 or 6 membered heterocyclic group containing carbon and heteroatoms of the group consisting of oxygen, sulfur and nitrogen; or wherein R and R 1 together with the nitrogen to which they are attached form a 5- or 6- membered heterocyclic ring containing carbon and heteroatoms of the group consisting of oxygen, sulfur and nitrogen.
Claim 2
Dependent Claim
159 words
A curable composition of matter which consists essentially of (a) a 1,2-polyepoxide compound with an average of more than one epoxide group in the molecule and (b) as a curing agent; a cyanamide of the formula ##STR6## wherein R is an organic radical of valency n which may contain up to 30 carbon atoms; and n represents a number at least equal to 2; R 1 is alkyl of 1 to 6 carbon atoms, aryl of 6 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, alkaryl of 7 to 15 carbon atoms, cycloalkyl of 5 or 6 carbon atoms, or a 5 or 6 membered heterocyclic group containing carbon and heteroatoms of the group consisting of oxygen, sulfur and nitrogen; or wherein R and R 1 together with the nitrogen to which they are attached form a 5- or 6- membered heterocyclic ring containing carbon and heteroatoms of the group consisting of oxygen, sulfur and nitrogen.
Claim 3
Dependent Claim
60 words
The curable composition according to claim 1 wherein R is an aliphatic hydrocarbon radical having 2 to 12 carbon atoms, an aromatic hydrocarbon radical having 6 to 30 carbon atoms or a 5- or 6-membered heterocyclic group containing carbon and heteroatoms of the group consisting of oxygen, sulfur and nitrogen; and n is an integer of from 2 to 6.
Claim 4
Dependent Claim
200 words
A curable composition according to claim 1 which consists essentially of (a) a 1,2-polyepoxide compound with an average of more than one epoxide group in the molecule and (b) as a curing agent, a cyanamide of the formula ##STR7## wherein R 2 is hydrogen, alkyl of 1 to 6 carbon atoms or aryl of 6 to 12 carbon atoms; X is hydrogen, alkyl of 1 to 6 carbon atoms, aryl of 6 to 12 carbon atoms, di-loweralkylamino, diarylamino wherein said aryl group contains 6 to 12 carbon atoms or the group R 1 --N--CN; R 1 is alkyl of 1 to 6 carbon atoms, aryl of 6 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, alkaryl of 7 to 15 carbon atoms, cycloalkyl of 5 or 6 carbon atoms, or a 5 or 6 membered heterocyclic group containing carbon atoms and heteroatoms of the group consisting of oxygen, sulfur and nitrogen; and R 3 is alkylene of 2 to 12 carbon atoms, cycloalkylene of 4 to 6 carbon atoms, arylene of 6 to 30 carbon atoms or a 5- or 6-membered heterocyclic group containing carbon atoms and heteroatoms of the group consisting of oxygen, sulfur and nitrogen.
Claim 5
Dependent Claim
15 words
The curable composition according to claim 1 which contains an effective amount of an accelerator.
Claim 6
Dependent Claim
15 words
The curable composition according to claim 4 wherein said accelerator is an organic tertiary amine.
Claim 7
Dependent Claim
12 words
The curable composition of claim 1 wherein the curing agent is N,N'-dicyanopiperazine.
Claim 8
Dependent Claim
12 words
The curable composition of claim 1 wherein the curing agent is tris-(N-cyanoanilino)-s-triazine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |