US4757119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin compositions containing poly-(hydrocarbylthio)aromatic diamines
Assignee: Albemarle Corp
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Filing: 1987-05-04
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Granted: 1988-07-12
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Expires: 2007-05-04
Abstract
Abstract Novel compositions suitable for use in preparing prepregs comprise an epoxy resin and a poly(hydrocarbylthio)aromatic diamine curing agent, preferably a substituted di(alkylthio)-diaminobenzene wherein the alkylthio groups contain 1-10 carbons.
Inventors
- 👤 Paul L. Wiggins
- 👤 Gordon G. Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:07
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/504
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
12 words
A composition comprising an epoxy resin and a poly(hydrocarbylthio)aromatic diamine curing agent.
Claim 2
Dependent Claim
12 words
A composition comprising an epoxy resin and a poly(hydrocarbylthio)aromatic diamine curing agent.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein the epoxy resin is a tetraglycidylmethylenedianiline epoxy resin.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein the epoxy resin is a diglycidyl ether of bisphenol A.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein the epoxy resin is an epoxy novolac resin.
Claim 6
Dependent Claim
15 words
The composition of claim 1 wherein the epoxy resin is a triglycidyl p-aminophenol epoxy resin.
Claim 7
Dependent Claim
21 words
The composition of claim 1 wherein the curing agent is a poly(alkylthio)aromatic diamine in which the alkylthio groups contain 1-10 carbons.
Claim 8
Dependent Claim
15 words
The composition of claim 6 wherein the curing agent is a substituted or unsubstituted di(alkylthio)diaminobenzene.
Claim 9
Dependent Claim
11 words
The composition of claim 7 wherein the curing agent is 3,5-di(methylthio)-2,4-diaminotoluene.
Claim 10
Dependent Claim
16 words
The composition of claim 7 wherein the curing agent is a mixture of 3,5-di(methylthio)-2,4-diaminotoluene and 3,5-di(methylthio)-2,6-diaminotoluene.
Claim 11
Dependent Claim
14 words
A composition comprising an epoxy resin chain extended with a poly(hydrocarbylthio)aromatic diamine curing agent.
Claim 12
Dependent Claim
14 words
A composition comprising an epoxy resin chain extended with a poly(hydrocarbylthio)aromatic diamine curing agent.
Claim 13
Dependent Claim
14 words
The composition of claim 10 wherein the epoxy resin is a tetraglycidylmethylenedianiline epoxy resin.
Claim 14
Dependent Claim
16 words
The composition of claim 10 wherein the epoxy resin is a diglycidyl ether of bisphenol A.
Claim 15
Dependent Claim
14 words
The composition of claim 10 wherein the epoxy resin is an epoxy novolac resin.
Claim 16
Dependent Claim
15 words
The composition of claim 10 wherein the epoxy resin is a triglycidyl p-aminophenol epoxy resin.
Claim 17
Dependent Claim
21 words
The composition of claim 10 wherein the curing agent is a poly(alkylthio)aromatic diamine in which the alkylthio groups contain 1-10 carbons.
Claim 18
Dependent Claim
15 words
The composition of claim 15 wherein the curing agent is a substituted or unsubstituted di(alkylthio)diaminobenzene.
Claim 19
Dependent Claim
11 words
The composition of claim 16 wherein the curing agent is 3,5-di(methylthio)-2,4-diaminotoluene.
Claim 20
Dependent Claim
16 words
The composition of claim 16 wherein the curing agent is a mixture of 3,5-di(methylthio)-2,4-diaminotoluene and 3,5-di(methylthio)-2,6-diaminotoluene.
Claim 21
Dependent Claim
15 words
A. prepreg comprising a fibrous reinforcement, an epoxy resin, and a poly(hydrocarbylthio)aromatic diamine curing agent.
Claim 22
Dependent Claim
15 words
A. prepreg comprising a fibrous reinforcement, an epoxy resin, and a poly(hydrocarbylthio)aromatic diamine curing agent.
Claim 23
Dependent Claim
16 words
The prepreg of claim 19 wherein the curing agent is a mixture of 3,5-di(methylthio)-2,4-diaminotoluene and 3,5-di(methylthio)-2,6-diaminotoluene.
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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) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |