US4918157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting composition comprising cyanate ester, urea compound and epoxy resin
Assignee: BP Corp North America Inc
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Filing: 1988-09-28
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Granted: 1990-04-17
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Expires: 2008-09-28
Abstract
Abstract Urea compounds having a plurality of substituents selected from hydrogen, substituted hydrocarbyl radicals and unsubstituted hydrocarbyl radicals are good latent cure accelerators for thermosetting cyanate resin formulations. The resulting cyanate resin formulations are useful as coatings, adhesives and as impregnating resins, particularly in applications where extended storage at or near room temperature is desired.
Inventors
- 👤 Hugh C. Gardner
- 👤 Richard H. Newman-Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:03
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C08G73/0661; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/68; C08G59/686; C08L; C08L63/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
28 words
A thermosetting composition comprising a cyanate ester; a urea compound selected from the group consisting of alkyl aryl ureas, aryl ureas and mixtures thereof; and an epoxy resin.
Claim 2
Dependent Claim
28 words
A thermosetting composition comprising a cyanate ester; a urea compound selected from the group consisting of alkyl aryl ureas, aryl ureas and mixtures thereof; and an epoxy resin.
Claim 3
Dependent Claim
37 words
The thermosetting composition of claim 1 comprising 100 pbw of said cyanate ester, from about 0.5 to about 12 pbw of said urea compound and from about 4 pbw to about 25 pbw of an epoxy resin.
Claim 4
Dependent Claim
16 words
The thermosetting composition of claim 1 further comprising up to about 12 pbw of a thermoplastic.
Claim 5
Dependent Claim
33 words
The thermosetting composition of claim 1 wherein the urea compound is an alkyl aryl urea selected from the group consisting of 1, 1-dimethyl-3-phenyl urea, 1,1-dimethyl-3-(4-chlorophenyl) urea, 1,1-dimethyl-3-(3,4-dichlorophenyl) urea, 2,4-bis-(N,N-dimethylureido) toluene and mixtures thereof.
Claim 6
Dependent Claim
27 words
The thermosetting composition of claim 1 wherein the urea compound is a diaryl urea selected from the group consisting of 1,3-diphenyl urea, 1-(4-chlorophenyl)-3-(3,4-dichlorophenyl) urea and mixtures thereof.
Claim 7
Dependent Claim
57 words
A thermosetting composition comprising 100 pbw of a cyanate ester; from about 0.5 to about 12 pbw of a urea compound selected from the group consisting of alkyl aryl ureas, aryl ureas and mixtures thereof; from about 4 pbw to about 25 pbw of an epoxy resin, and up to about 12 pbw of a thermoplastic polysulfone.
Claim 8
Dependent Claim
57 words
A thermosetting composition comprising 100 pbw of a cyanate ester; from about 0.5 to about 12 pbw of a urea compound selected from the group consisting of alkyl aryl ureas, aryl ureas and mixtures thereof; from about 4 pbw to about 25 pbw of an epoxy resin, and up to about 12 pbw of a thermoplastic polysulfone.
Claim 9
Dependent Claim
32 words
The thermosetting composition of claim 6 wherein said urea compound is selected from the group consisting of 1,1-dimethyl-3-phenyl urea, 1,1-dimethyl-3-(4-chlorophenyl) urea, 1,1-dimethyl-3-(3,4-dichlorophenyl) urea, 2,4-bis-(N,N-dimethylureido) toluene, 1,3-dipheny urea, 1-(4-chlorophenyl)-3-(3,4-dichlorophenyl) urea and mixtures thereof.
References Cited (Backward Citations)
US4804740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |