US4683276A
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Cyanate functional maleimide thermosetting composition
Assignee: Dow Chemical Co
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Filing: 1985-10-01
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Granted: 1987-07-28
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Expires: 2005-10-01
Abstract
Abstract Thermoset products are prepared by polymerizing (A) at least one thermosettable compound which contains both a maleimide group and a cyanate group such as 3-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenyl cyanate and optionally (B) at least one of (1) at least one aromatic polycyanate such as bisphenol A dicyanate; (2) at least one polymaleimide such as N,N'-(methylenedi-p-phenylene)bismaleimide; (3) at least one material having an average of more than one vicinal epoxide group per molecule such as a diglycidyl ether of bisphenol A; (4) at least one polymerizable ethylenically unsaturated material such as styrene; or (5) a mixture of any two or more of components 1-4 in any combination.
Inventors
- 👤 Robert E. Hefner, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:03
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/36; C08F22/40; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
A composition comprising at least one thermosettable compound which contains simultaneously in the same molecule only one maleimide or substituted maleimide group which groups are represented by the formula ##STR22## wherein each R and R 1 is independently hydrogen or a hydrocarbyl group having from 1 to about 3 carbon atoms; and only one cyanate group.
Claim 2
Dependent Claim
56 words
A composition comprising at least one thermosettable compound which contains simultaneously in the same molecule only one maleimide or substituted maleimide group which groups are represented by the formula ##STR22## wherein each R and R 1 is independently hydrogen or a hydrocarbyl group having from 1 to about 3 carbon atoms; and only one cyanate group.
Claim 3
Dependent Claim
87 words
A composition of claim 1 wherein said compound is represented by the formulas ##STR23## wherein each R and R 1 is independently hydrogen or a hydrocarbyl group having from 1 to about 3 carbon atoms; each R' is independently hydrogen, a hydrocarbyl or hydrocarbyloxy group having from 1 to about 10 carbon atoms or a halogen atom; A is a divalent hydrocarbon group having from 1 to about 10 carbon atoms, ##STR24## n has a value of zero or 1 and x has a value of 4.
Claim 4
Dependent Claim
48 words
A composition of claim 2 wherein each R' is independently hydrogen, a hydrocarbyl or hydrocarbyloxy group having from 1 to about 4 carbon atoms or a halogen atom; and when A is present and is a divalent hydrocarbyl group, it has from 1 to about 4 carbon atoms.
Claim 5
Dependent Claim
25 words
A composition of claim 3 wherein said thermosettable compound which contains both a maleimide group and a cyanate group is 3-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenyl cyanate or 4-(1-(4-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenyl)-1-methylethyl)phenyl cyanate.
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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |