Patent US3943104A successfully refreshed from Google Patents.
US3943104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of accelerating epoxy curing
Assignee: Texaco Inc
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Filing: 1974-12-12
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Granted: 1976-03-09
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Expires: 1994-12-12
Abstract
Abstract Epoxy resins, of the polyglycidyl ether of a polyhydric phenol type, are cured by incorporating therein a polyoxyalkylenepolyamine and an accelerator combination of piperazine and an alkanolamine, the combination having a combined weight ratio of between about 1:8 to 1:1. The accelerator combination is synergistic for accelerating the curing of a polyglycidyl ether of a polyhydric phenol cured with a polyoxyalkylenepolyamine at ambient or elevated temperatures. The epoxy resin products are useful in protective coatings, adhesives, seamless and terrazzo flooring, castings, laminates, and in grouting, potting, encapsulating, caulking and sealing compositions.
Inventors
- 👤 Harold George Waddill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:46
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; C08L; C08L63/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
In a process for curing a polyglycidyl ether of a polyhydric phenol with a polyoxyalkylenepolyamine by combining a polyglycidyl ether of a polyhydric phenol with stoichiometric quantities of a polyoxyalkylenepolyamine, the improvement which comprises: accelerating said curing by addition of an accelerator combination of piperazine and an alkanolamine, said accelerator combination having a weight ratio of about 1:8 to 1:1 piperazine to alkanolamine.
Claim 2
Dependent Claim
63 words
In a process for curing a polyglycidyl ether of a polyhydric phenol with a polyoxyalkylenepolyamine by combining a polyglycidyl ether of a polyhydric phenol with stoichiometric quantities of a polyoxyalkylenepolyamine, the improvement which comprises: accelerating said curing by addition of an accelerator combination of piperazine and an alkanolamine, said accelerator combination having a weight ratio of about 1:8 to 1:1 piperazine to alkanolamine.
Claim 3
Dependent Claim
37 words
A process according to claim 1 wherein the accelerator combination of piperazine and alkanolamine is added in an amount of between about 1 to 100 parts by combined weight per 100 parts by weight by said polyoxyalkylenepolyamine.
Claim 4
Dependent Claim
12 words
A process according to claim 1 wherein said polyoxyalkylenepolyamine is a polyoxypropylenediamine.
Claim 5
Dependent Claim
15 words
A process according to claim 1 wherein the alkanolamine is a mono-, di-, or triethanolamine.
Claim 6
Dependent Claim
23 words
A process according to claim 1 wherein said polyoxyalkylenepolyamine is a polyoxypropylenediamine having an average molecular weight of about 230 to about 400.
Claim 7
Dependent Claim
38 words
A process according to claim 5 wherein the accelerator combination is piperazine and triethanolamine and is added in an amount of between about 1 to 100 parts by combined weight per 100 parts by weight of said polypropylenediamine.
Claim 8
Dependent Claim
38 words
The process of claim 2 wherein said alkanolamine is triethanolamine, said polyoxyalkylenepolyamine is a polyoxypropylenediamine having an average molecular weight of about 400 and the ratio of piperazine to triethanolamine added is between 1:2 to 1:4 by weight.
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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |