US5075379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber/diamine blends for use in curing epoxy resins
Assignee: University of Southern Mississippi
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Filing: 1990-09-10
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Granted: 1991-12-24
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Expires: 2010-09-10
Abstract
Abstract The use of a blend of diaminoisopropylbenzene (DAIPB) and an amine terminated butadiene nitrile liquid rubber (ATBN) for curing epoxy resins is provided. The DAIPB/ATBN blend produces a rubber toughened epoxy resin having improved tensile properties.
Inventors
- 👤 Robson F. Storey
- 👤 Sudhakar Dantiki
- 👤 J. Patrick Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08L; C08L63/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A method of using a blend of diaminoisopropylbenzene and an amine terminated butadiene nitrile liquid rubber in the production of cured epoxy resins comprising mixing a blend of diaminoisopropylbenzene and an amine terminated butadiene nitrile liquid rubber with an epoxy resin in the absence of a cure accelerator and subjecting said mixture to conditions sufficient to cure said epoxy resin, wherein said diaminoisopropylbenzene is present in an amount of from about 90 to 99.5 weight percent and said amine terminated butadiene nitrile liquid rubber is present in an amount of from about 0.5 to 10 weight percent.
Claim 2
Independent Claim
97 words
A method of using a blend of diaminoisopropylbenzene and an amine terminated butadiene nitrile liquid rubber in the production of cured epoxy resins comprising mixing a blend of diaminoisopropylbenzene and an amine terminated butadiene nitrile liquid rubber with an epoxy resin in the absence of a cure accelerator and subjecting said mixture to conditions sufficient to cure said epoxy resin, wherein said diaminoisopropylbenzene is present in an amount of from about 90 to 99.5 weight percent and said amine terminated butadiene nitrile liquid rubber is present in an amount of from about 0.5 to 10 weight percent.
Claim 3
Dependent Claim
27 words
A method according to claim 1 wherein said amine terminated butadiene nitrile liquid rubber is present in an amount of from about 2 to 5 weight percent.
References Cited (Backward Citations)
US4593056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |