US4873309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized flame-retardant epoxy resin composition from a brominated epoxy resin and a vinyl monomer diluent
Assignee: Resolution Performance Products LLC
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Filing: 1987-06-08
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Granted: 1989-10-10
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Expires: 2007-06-08
Abstract
Abstract A composition is provided comprising the reaction product of a brominated phenhol and epichlorohydrin having a bromine content of at least about 30 percent and a weight per epoxide within the range of about 450 to about 800, an optional non-brominated epoxy resin, a curing agent for the epoxy resins, and a reactive diluent. The use of the defined brominated epoxy resin enables the preparation of a flame-retardant epoxy laminating system which has improved stability against crystallization with storage.
Inventors
- 👤 Larry S. Corley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:27
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08F; C08F283/00; C08F283/10; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0326
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
A composition comprising: (a) a brominated epoxy resin which is the reaction product of a brominated polyhydric phenol and epichlorohydrin, said brominated epoxy resin having a weight per epoxide within the range of about 450 to about 800 and a bromine content of from about 30 to about 70 percent; (b) an effective amount of a curing agent for the brominated epoxy resin; and (c) from about 5 to 50 weight percent, based on the weight of the composition, of at least one reactive diluent selected from the group consisting essentially of aliphatic and aromatic monomers having at least one site of vinyl unsaturation.
Claim 2
Dependent Claim
104 words
A composition comprising: (a) a brominated epoxy resin which is the reaction product of a brominated polyhydric phenol and epichlorohydrin, said brominated epoxy resin having a weight per epoxide within the range of about 450 to about 800 and a bromine content of from about 30 to about 70 percent; (b) an effective amount of a curing agent for the brominated epoxy resin; and (c) from about 5 to 50 weight percent, based on the weight of the composition, of at least one reactive diluent selected from the group consisting essentially of aliphatic and aromatic monomers having at least one site of vinyl unsaturation.
Claim 3
Dependent Claim
26 words
The composition of claim 1 which further comprises (d) a second epoxy resin, which second epoxy resin is a non-brominated diglycidyl ether of a polyhydric phenol.
Claim 4
Dependent Claim
14 words
The composition of claim 1 in which the curing agent comprises an aromatic amine.
Claim 5
Dependent Claim
45 words
The composition of claim 1 in which the reactive diluent is selected from vinyl aromatic monomers, esters of ethylenically unsaturated carboxylic acids, amides of ethylenically unsaturated carboxylic acids, polyacrylate esters of polyols, polymethacrylate esters of polyols, cyano-containing compounds, vinyl esters, vinyl amides and allyl-containing compounds.
Claim 6
Dependent Claim
25 words
The composition of claim 1 in which the brominated epoxy resin has a weight per epoxide within the range of about 450 to about 650.
Claim 7
Dependent Claim
25 words
The composition of claim 5 in which the brominated epoxy resin is present in an amount of from about 30 to about 60 weight percent.
Claim 8
Dependent Claim
23 words
The composition of claim 1 in which the brominated epoxy resin has a bromine content of from about 40 to about 60 percent.
Claim 9
Dependent Claim
12 words
The composition of claim 1 in which the curing agent comprises methylenedianiline.
Claim 10
Dependent Claim
12 words
The composition of claim 1 in which the reactive diluent comprises styrene.
Claim 11
Dependent Claim
13 words
The composition of claim 1 in which the reactive diluent comprises trimethylolpropane trimethacrylate.
Claim 12
Dependent Claim
14 words
The composition of claim 1 further comprising an effective amount of a cure accelerator.
Claim 13
Dependent Claim
17 words
The composition of claim 11 in which the cure accelerator is selected from imidazoles and sulfonium salts.
Claim 14
Dependent Claim
12 words
The composition of claim 11 in which the cure accelerator is 2-methylimidazole.
Claim 15
Dependent Claim
8 words
A prepreg comprising the composition of claim 1.
Claim 16
Dependent Claim
9 words
An electrical laminate comprising the composition of claim 1.
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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) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |