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US4189564A
Expired / Lapsed
US
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Non-crystallizing epoxy resin accelerator
Assignee: Huntsman Corp
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Filing: 1978-10-19
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Granted: 1980-02-19
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Expires: 1998-10-19
Abstract
Abstract A novel epoxy resin curing accelerator comprises a mixture of piperazine, N-aminoethylpiperazine (AEP) and triethanolamine (TEA). The resins comprise a vicinal polyepoxide, a curing agent, and an amount of piperazine, AEP and TEA mixture effective for accelerating the cure of the polyepoxide. The accelerator combination is synergistic for accelerating the curing of an epoxy resin cured with an amine 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 G. Waddill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:34
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; C08L; C08L63/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
33 words
As a composition of matter, an accelerator combination for accelerating the curing of a polyglycidyl ether of a polyhydric phenol cured with an amine, said accelerator combination comprising piperazine, N-aminoethylpiperazine and an alkanolamine.
Claim 2
Dependent Claim
33 words
As a composition of matter, an accelerator combination for accelerating the curing of a polyglycidyl ether of a polyhydric phenol cured with an amine, said accelerator combination comprising piperazine, N-aminoethylpiperazine and an alkanolamine.
Claim 3
Dependent Claim
37 words
A composition as in claim 1 wherein the components are present in amounts ranging from about 5 to 30 weight percent piperazine, about 5 to 50 weight percent N-aminoethylpiperazine and about 50 to 85 weight percent alkanolamine.
Claim 4
Dependent Claim
28 words
An accelerator combination of claim 1 wherein said alkanolamine is selected from the group consisting of mono-, di-, or triethanolamine, hydroxy ethoxyethylamine, N-aminoethylethanolamine, N,N-bis(hydroxypropyl), N-hydroxyethylamine, and mixtures thereof.
Claim 5
Dependent Claim
11 words
An accelerator combination of claim 1 wherein the alkanolamine is triethanolamine.
Claim 6
Dependent Claim
50 words
In a process for curing a polyglycidyl ether of a polyhydric phenol with an amine curing agent by combining a polyglycidyl ether of a polyhydric phenol with an amine curing agent, the improvement which comprises: accelerating said curing by addition of an accelerator combination of piperazine, N-aminoethylpiperazine and an alkanolamine.
Claim 7
Dependent Claim
50 words
In a process for curing a polyglycidyl ether of a polyhydric phenol with an amine curing agent by combining a polyglycidyl ether of a polyhydric phenol with an amine curing agent, the improvement which comprises: accelerating said curing by addition of an accelerator combination of piperazine, N-aminoethylpiperazine and an alkanolamine.
Claim 8
Dependent Claim
38 words
A process as in claim 5 wherein the accelerator components are present, in amounts ranging from about 5 to 30 weight percent piperazine, about 5 to 50 weight percent N-aminoethylpiperazine and about 50 to 85 weight percent alkanolamine.
Claim 9
Dependent Claim
35 words
A process according to claim 5 wherein the accelerator combination is added in an amount of between about 1 to 100 parts by combined weight per 100 parts by weight of said amine curing agent.
Claim 10
Dependent Claim
14 words
A process according to claim 5 wherein said amine curing agent is a polyoxypropylenediamine.
Claim 11
Dependent Claim
15 words
A process according to claim 5 wherein the alkanolamine is a mono-, di-, or triethanolamine.
Claim 12
Dependent Claim
20 words
A process according to claim 8 wherein said polyoxyalkylenediamine has an average molecular weight of about 230 to about 400.
Claim 13
Dependent Claim
33 words
A process according to claim 10 wherein the accelerator combination is added in an amount of between about 1 to 100 parts by combined weight per 100 parts by weight of said polypropylenediamine.
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) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |