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US4774316A
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Copolymer of vinylbenzyl ether of polyhydric halogenated phenolic compound and aromatic polycyanate ester compound
Assignee: Honeywell International Inc
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Filing: 1986-08-15
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Granted: 1988-09-27
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Expires: 2006-08-15
Abstract
Abstract The polyfunctional vinylbenzyl ethers of polyhydric halogenated phenolic compounds are prepared and can be copolymerized with polycyanate ester compounds to provide copolymers having dielectric constants below 3 and a V-O rating in a UL-94 test.
Inventors
- 👤 James P. Godschalx
- 👤 Edmund P. Woo
- 👤 Patricia A. Schrader
- 👤 Peter D. Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:49
CPC Classifications
C; C07; C07C; C07C41/00; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C08; C08F; C08F212/00; C08F212/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
A copolymer composition comprising a reaction product of a polyfunctional vinylbenzyl ether of a polyhydric halogenated phenolic compound and an aromatic polycyanate ester compound of the formula ##STR9## wherein y represents an average value of a real number between about zero and 5, inclusive.
Claim 2
Dependent Claim
44 words
A copolymer composition comprising a reaction product of a polyfunctional vinylbenzyl ether of a polyhydric halogenated phenolic compound and an aromatic polycyanate ester compound of the formula ##STR9## wherein y represents an average value of a real number between about zero and 5, inclusive.
Claim 3
Dependent Claim
41 words
The copolymer composition of claim 1, wherein the polyhydric halogenated phenolic compound is tetrabromobisphenol A, and the aromatic polycyanate ester compound is a dicyclopentadiene bridged polycyanate ester which corresponds to the formula ##STR10## wherein y represents an average value of 0.2.
Claim 4
Dependent Claim
29 words
The copolymer composition of claim 2 wherein the copolymer composition exhibits a dielectric constant of less than 3 at 10 kHz, and a V-O rating in a UL-94 test.
Claim 5
Dependent Claim
22 words
The copolymer composition of claim 1 wherein y represents an average value of a real number between about zero and 2, inclusive.
Claim 6
Dependent Claim
22 words
The copolymer composition of claim 2 wherein y represents an average value of a real number between about zero and 1, inclusive.
References Cited (Backward Citations)
US3058953A
Cited
US4116936A
Cited
US4469859A
Cited
US4477629A
Cited
US4581425A
Cited
US4559399A
Cited
US4665154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |