Patent US4456712A successfully refreshed from Google Patents.
US4456712A
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Bismaleimide triazine composition
Assignee: International Business Machines Corp
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Filing: 1983-04-26
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Granted: 1984-06-26
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Expires: 2003-04-26
Abstract
Abstract A composition suitable for making circuit boards containing a bismaleimide triazine polymeric component, a brominated epoxy polymeric component, and a solvent is provided.
Inventors
- 👤 Frederick R. Christie
- 👤 Lawrence R. Daley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:04
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08L; C08L79/00; C08L79/04; H01B3/40; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T442/00; Y10T442/20; Y10T442/2926
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
99 words
A composition consisting essentially of: (a) about 70 to about 80% by weight of bismaleimide triazine polymeric component wherein said bismaleimide triazine polymeric component is from bisphenol-A-dicyanate and the bis-imide of 4,4'-diaminodiphenyl methane and maleic anhydride; (b) about 20 to about 30% by weight of a brominated epoxy polymeric component wherein said brominated epoxy polymeric component is a tetrabrominated diglycidyl ether of bisphenol A and contains at least 45% by weight of bromine; and (c) solvent in an amount of about 10 to 70% by weight based upon the total weight of (a), (b), and (c) in the composition.
Claim 2
Dependent Claim
99 words
A composition consisting essentially of: (a) about 70 to about 80% by weight of bismaleimide triazine polymeric component wherein said bismaleimide triazine polymeric component is from bisphenol-A-dicyanate and the bis-imide of 4,4'-diaminodiphenyl methane and maleic anhydride; (b) about 20 to about 30% by weight of a brominated epoxy polymeric component wherein said brominated epoxy polymeric component is a tetrabrominated diglycidyl ether of bisphenol A and contains at least 45% by weight of bromine; and (c) solvent in an amount of about 10 to 70% by weight based upon the total weight of (a), (b), and (c) in the composition.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein said brominated epoxy polymeric component contains at least about 50% by weight bromine.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein said solvent is a ketone.
Claim 5
Dependent Claim
17 words
The composition of claim 3 wherein said solvent is substantially free from solvents other than said ketone.
Claim 6
Dependent Claim
22 words
The composition of claim 1 wherein said solvent is a ketone selected from the group of acetone, methylethyl ketone, or mixtures thereof.
Claim 7
Dependent Claim
17 words
The composition of claim 5 wherein said solvent is substantially free from solvents other than said ketone.
Claim 8
Dependent Claim
25 words
The composition of claim 1 which is substantially free from polymeric materials other than said bismaleimide triazine polymeric component and said brominated epoxy polymeric component.
Claim 9
Dependent Claim
25 words
The composition of claim 1 wherein the relative amount of triazine to bismaleimide in said triazine bismaleimide polymeric component is about 5.5:1 to about 9:1.
Claim 10
Dependent Claim
19 words
The composition of claim 1 which has a glass transition temperature of at least about 175° C. when cured.
Claim 11
Dependent Claim
33 words
The composition of claim 1 wherein said brominated epoxy polymeric material has a melting point of about 55° C., an epoxy value (eq/100 g) of 0.26, and weight per epoxide of about 385.
Claim 12
Dependent Claim
20 words
A product comprising a fibrous substrate impregnated with the composition of claim 1 and a curing agent of said composition.
Claim 13
Dependent Claim
10 words
The product of claim 11 wherein said substrate is fiberglass.
Claim 14
Dependent Claim
12 words
The product of claim 11 wherein said curing agent is zinc octoate.
Claim 15
Dependent Claim
21 words
The product of claim 11 wherein said composition when cured has a glass transition temperature of at least about 175° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |