Patent US4603182A successfully refreshed from Google Patents.
US4603182A
Expired / Lapsed
US
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Low viscosity epoxy resin compositions
Assignee: General Electric Co
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Filing: 1984-10-05
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Granted: 1986-07-29
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Expires: 2004-10-05
Abstract
Abstract The viscosities of solventless compositions of epoxy resins containing 1, 2 epoxy groups and having at least two epoxide groups per molecule and effective amounts of catalytic hardener and phenolic accelerator are dramatically reduced to make them useful for vacuum-pressure impregnation and also for pre-impregnated insulating material applications by addition of 3-33% of reactive diluent such as styrene.
Inventors
- 👤 Mark Markovitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:18
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C08; C08F; C08F283/00; C08F283/10; C08G; C08G59/00; C08G59/18; C08G59/68; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2911; Y10T428/2913; Y10T428/2933; Y10T428/2936; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31529
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
A thermosetting resin composition having superior thermal stability consisting essentially of between about 50% and about 95% of 1, 2 epoxy resin having at least two epoxide groups per molecule, between about 3% and about 33% of a reactive diluent selected from the group consisting of styrene, alphamethyl styrene, an isomer or mixture of isomers of vinyl toluene, of t-butyl styrene, of divinyl benzene, and of diisopropenyl benzene, and mixtures thereof, and small but effective amount of a phenolic accelerator and a labile hydrogen-free catalytic hardener.
Claim 2
Dependent Claim
86 words
A thermosetting resin composition having superior thermal stability consisting essentially of between about 50% and about 95% of 1, 2 epoxy resin having at least two epoxide groups per molecule, between about 3% and about 33% of a reactive diluent selected from the group consisting of styrene, alphamethyl styrene, an isomer or mixture of isomers of vinyl toluene, of t-butyl styrene, of divinyl benzene, and of diisopropenyl benzene, and mixtures thereof, and small but effective amount of a phenolic accelerator and a labile hydrogen-free catalytic hardener.
Claim 3
Dependent Claim
21 words
The resin composition of claim 1 in which the diluent is ortho-, meta-, para-t-butyl styrene or a mixture of those isomers.
Claim 4
Dependent Claim
21 words
The resin composition of claim 1 in which the diluent is ortho-, meta-, para-vinyl toluene or a mixture of those isomers.
Claim 5
Dependent Claim
18 words
The resin composition of claim 1 in which the diluent is present in amount between 7.5% and 25%.
Claim 6
Dependent Claim
21 words
The resin composition of claim 4 in which the diluent is ortho-, meta-, para-t-butyl styrene or a mixture of those isomers.
Claim 7
Dependent Claim
21 words
The resin composition of claim 4 in which the diluent is ortho-, meta-, para-vinyl toluene or a mixture of those isomers.
Claim 8
Dependent Claim
12 words
The resin composition of claim 4 in which the diluent is styrene.
Claim 9
Dependent Claim
21 words
The resin composition of claim 4 in which the diluent is ortho-, meta-, para-diisopropenyl benzene or a mixture of those isomers.
Claim 10
Dependent Claim
16 words
The resin composition of claim 1 having viscosity less than about 3000 cps at 25° C.
Claim 11
Dependent Claim
50 words
The resin composition of claim 1 in which the phenolic accelerator is in quantity between 0.1% and 15% by weight of the epoxy resin, and in which the catalytic hardener is selected from the group consisting of 0.025% to 5.0% metal acetylacetonate, 0.05% to 10% organic titanate, and mixtures thereof.
Claim 12
Dependent Claim
30 words
The resin composition of claim 1 in which the catalytic hardener is a metal acetylacetonate selected from the group consisting of aluminum acetylacetonate, zirconium acetylacetonate, titanium acetylacetonate, and mixtures thereof.
Claim 13
Dependent Claim
29 words
The resin composition of claim 11 in which the catalytic hardener is an organic titanate selected from the group consisting of tetraoctylene glycol titanate, tetrabutyl titanate, and mixtures thereof.
Claim 14
Dependent Claim
26 words
The resin composition of claim 11 in which the phenolic accelerator is selected from the group consisting of catechol, resorcinol, phenol novolac resin and mixtures thereof.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |