US4668758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cure rate control in epoxy resin compositions
Assignee: Shell USA Inc
•
Filing: 1985-09-30
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Granted: 1987-05-26
•
Expires: 2005-09-30
Abstract
Abstract An epoxy resin composition containing a cationic curing agent and a cure-retarding amount of a diarylamine. The diarylamine lengthens the pot life of the epoxy-curing agent composition.
Inventors
- 👤 Larry S. Corley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:36
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
56 words
A composition comprising: (a) an epoxy resin; (b) a cationic curing agent for the epoxy resin selected from the group consisting of protonic acids having anions of low nucleophilicity and metal salts of such protonic acids; and (c) a diarylamine present in an amount effective to retard cure of the epoxy resin by the curing agent.
Claim 2
Dependent Claim
56 words
A composition comprising: (a) an epoxy resin; (b) a cationic curing agent for the epoxy resin selected from the group consisting of protonic acids having anions of low nucleophilicity and metal salts of such protonic acids; and (c) a diarylamine present in an amount effective to retard cure of the epoxy resin by the curing agent.
Claim 3
Dependent Claim
51 words
The composition of claim 1 in which the curing agent is selected from the group consisting of HBF 4 , HPF 6 , HSbF 6 , CF 3 SO 3 H, H 2 SO 4 , Sn(BF 4 ) 2 , Al(BF 4 ) 3 and Mg(BF 4 ) 2 .
Claim 4
Dependent Claim
35 words
The composition of claim 1 in which the diarylamine can be represented by the formula ##STR3## wherein each R and R' is selected independently from H, C 1 -C 10 alkyl, halogen, hydroxyl and ArNH--.
Claim 5
Dependent Claim
11 words
The composition of claim 3 in which the diarylamine is diphenylamine.
Claim 6
Dependent Claim
33 words
The composition of claim 3 in which the diarylamine is present in the composition in an amount of about 0.01 to about 20 weight percent, based on the weight of the epoxy resin.
Claim 7
Dependent Claim
34 words
The composition of claim 5 in which the curing agent is present in the composition in an amount of about 0.01 to about 10 weight percent, based on the weight of the epoxy resin.
Claim 8
Dependent Claim
29 words
The composition of claim 6 in which the epoxy resin is a reaction product of epichlorohydrin and bisphenol-A having a molecular weight of from about 340 to about 1500.
Claim 9
Dependent Claim
10 words
The composition of claim 7 which further comprises a surfactant.
Claim 10
Independent Claim
84 words
A method for retarding the cure of an epoxy resin by a cationic curing agent selected from the group consisting of HBF 4 , HPF 6 , HPF 6 , HSbF 6 , CF 3 SO 8 H, H 2 SO 4 , Sn(BF 4 ) 3 and Mg(BF 4 ) 2 comprising incorporating in a mixture of the epoxy resin and the cationic curing agent from about 0.01 to about 20 weight percent, based on the weight ofthe epoxy resin, of a diarylamine.
Claim 11
Independent Claim
84 words
A method for retarding the cure of an epoxy resin by a cationic curing agent selected from the group consisting of HBF 4 , HPF 6 , HPF 6 , HSbF 6 , CF 3 SO 8 H, H 2 SO 4 , Sn(BF 4 ) 3 and Mg(BF 4 ) 2 comprising incorporating in a mixture of the epoxy resin and the cationic curing agent from about 0.01 to about 20 weight percent, based on the weight ofthe epoxy resin, of a diarylamine.
Claim 12
Dependent Claim
31 words
The method of claim 9 is which the epoxy resin is a reaction product of epichlorohydrin and bisphenol-A having a molecular weight in the range of about 340 to about 1500.
Claim 13
Dependent Claim
47 words
The method of claim 9 in which the cationic curing agent is selected from the group consisting of HBF 4 , HPF 6 , HSbF 6 , CF 3 SO 3 H, H 2 SO 4 , Sn(BF 4 ) 3 and Mg(BF 4 ) 2 .
Claim 14
Dependent Claim
22 words
The method of claim 11 in which the mixture of the epoxy resin and the cationic curing agent further comprises a surfactant.
Claim 15
Dependent Claim
36 words
The method of claim 11 in which the diarylamine can be represented by the formula ##STR4## wherein each R and each R' is selected independently from H, C 1 -C 10 alkyl, halogen, hydroxyl and ArNH--.
Claim 16
Dependent Claim
30 words
The method of claim 13 in which the diarylamine is mixed first with the epoxy resin and the resulting epoxy resin-diarylamine composition is then mixed with the cationic curing agent.
Claim 17
Dependent Claim
48 words
The method of claim 13 in which the cationic curing agent is present in an amount of from about 0.5 to about 5 weight percent and the diarylamine is present in an amount of about 1 to about 10 percent, based on the weight of the epoxy resin.
Claim 18
Dependent Claim
19 words
The composition of claim 1 in which the curing agent is HBF4 and the diarylamine is an alkylated diphenylamine.
Claim 19
Dependent Claim
19 words
The method of claim 9 in which the curing agent is HBF4 and the diarylamine is an alkylated diphenylamine.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |