US4559395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardent epoxy resin composition
Assignee: Shell USA Inc
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Filing: 1985-02-22
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Granted: 1985-12-17
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Expires: 2005-02-22
Abstract
Abstract This invention relates to a flame retardant cured epoxy composition useful for electrical laminates comprising a brominated epoxy resin, aromatic amine and dicyandiamide.
Inventors
- 👤 Roy J. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:18
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021; C08G59/50; C08G59/56; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0326
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
An epoxy resin composition useful for preparing flame retardant laminates, said composition comprising: (a) a brominated epoxy resin comprising the reaction product of tetrabromobisphenol-A and epichlorohydrin having an epoxide equivalent weight of about 350 to about 1500 and a bromine content of about 10 to about 50 percent by weight; (b) an effective amount of an aromatic amine curing agent; and (c) about 2.5 to about 10 parts by weight of dicyandiamide as a curing agent per 100 parts by weight of said brominated epoxy resin.
Claim 2
Dependent Claim
86 words
An epoxy resin composition useful for preparing flame retardant laminates, said composition comprising: (a) a brominated epoxy resin comprising the reaction product of tetrabromobisphenol-A and epichlorohydrin having an epoxide equivalent weight of about 350 to about 1500 and a bromine content of about 10 to about 50 percent by weight; (b) an effective amount of an aromatic amine curing agent; and (c) about 2.5 to about 10 parts by weight of dicyandiamide as a curing agent per 100 parts by weight of said brominated epoxy resin.
Claim 3
Dependent Claim
28 words
The composition of claim 1 wherein said aromatic amine is selected from the group consisting of methylenedianiline, metaphenylenediamine, 2,4-bis[p-aminobenzyl]aniline, diaminodiphenyl sulfone, 2,4-toluenediamine, 1,3-diamino-2,4-diethyl-6-methylbenzene, 4,4'-oxydianiline, methylenebis(ortho-chloroaniline), 2,6-diaminopyridine, 4-bromo-1,3-diaminobenzene, etc.
Claim 4
Dependent Claim
11 words
The composition of claim 2 wherein said aromatic amine is 2,4-bis(p-aminobenzyl)aniline.
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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |