US4769440A
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Cyanate functional maleimide aromatic polycyanate thermosetting composition
Assignee: Dow Chemical Co
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Filing: 1987-03-18
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Granted: 1988-09-06
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Expires: 2007-03-18
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
2026-11-02 23:00
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08F; C08F22/00; C08F22/36; C08F22/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
50 words
A composition which comprises (A) at least one thermosettable compound which simultaneously contains both a maleimide group and a cyanate group and (B) at least one aromatic polycyanate; wherein component (A) comprises from about 1 to about 99 percent by weight of the combined weight of components (A) and (B).
Claim 2
Dependent Claim
50 words
A composition which comprises (A) at least one thermosettable compound which simultaneously contains both a maleimide group and a cyanate group and (B) at least one aromatic polycyanate; wherein component (A) comprises from about 1 to about 99 percent by weight of the combined weight of components (A) and (B).
Claim 3
Dependent Claim
278 words
A composition of claim 1 wherein (i) component (A) is represented by the following formulas (I) and (II) ##STR22## 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, --O--, --CO--, --S--, --S--S--, --SO--,--SO 2 --or --O--CO--O--; n has a value of zero or 1 and x has a value of 4; (ii)component (B) is represeted by the following formulas (XII), XIII), (XIV) or (XV) ##STR23## wherein each A is independently a divalent hydrocarbon group having from 1 to about 10 carbon atoms, --O--, --C--, --S--, --S--S--, --SO--, --SO 2 -- or --O--CO--O--; each A' is independently a divalent hydrocarbon group having from 1 to about 6 carbon atoms or a ##STR24## group; R' is hydrogen, a hydrocarbyl or hydrocarbyloxy group having from 1 to about 10 carbon atoms or a halogen atom; each Z is independently hydrogen, a hydrocarbyl or hydrocarbyloxy group having from 1 to about 4 carbon atoms, chlorine, bromine or a --O--C.tbd.N group; m has a value of from zero to about 100; n has a value of zero or 1; n" has a value of from about 0.001 to about 6; p has a value from zero to about 10; x has a value of 4; and x' has a value of 3; and (iii) component (A) comprises from about 1 to about 75 percent by weight of the combined weight of components (A) and (B).
Claim 4
Dependent Claim
27 words
A composition of claim 2 wherein component (A) comprises from about 5 to about 50 percent by weight of the combined weight of components (A) and (B).
Claim 5
Dependent Claim
91 words
A composition of claim 3 wherein when n has a value of 1 and A is a divalent hydrocarbyl group, it has from 1 to about 4 carbon atoms; A 1 is independently a divalent hydrocarbon group having from 1 to about 4 carbon atoms; when R' is is a hydrocarbyl or hydrocarbyloxy group it has from 1 to about 4 carbon atoms; n' has a value from zero to about 5; n" has a value from 0.01 to about 3; and p has a value from zero to about 3.
Claim 6
Dependent Claim
22 words
A composition of claim 4 wherein component (B) is bisphenol A dicyanate or the polycyanate of a dicyclopentadiene and phenol condensation product.
Claim 7
Dependent Claim
14 words
A composition of claim 5 wherein component (A) 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.
Claim 8
Dependent Claim
10 words
The product resulting from copolymerizing a composition of claim 1.
Claim 9
Dependent Claim
10 words
The product resulting from copolymerizing a composition of claim 2.
Claim 10
Dependent Claim
10 words
The product resulting from copolymerizing a composition of claim 3.
Claim 11
Dependent Claim
10 words
The product resulting from copolymerizing a composition of claim 4.
Claim 12
Dependent Claim
10 words
The product resulting from copolymerizing a composition of claim 5.
Claim 13
Dependent Claim
10 words
The product resulting from copolymerizing a composition of claim 6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |