Patent US3868613A successfully refreshed from Google Patents.
US3868613A
Expired / Lapsed
US
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Solventless epoxy resin composition and an electrical member impregnated therewith
Assignee: Westinghouse Electric Corp
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Filing: 1973-05-18
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Granted: 1975-02-25
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Expires: 1993-05-18
Abstract
Abstract A resinous composition, suitable as a solventless impregnating resin for large rotating apparatus insulation, is made from a mixture containing about 85 to 115 parts of a bisphenol A or novolac glycidyl ether epoxy resin, about 100 to 155 parts of an acid anhydride and about 25 to 95 parts of a diglycidyl ether of neopentyl glycol.
Inventors
- 👤 Jr Dow A Rogers
- 👤 James D B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:00
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/226; C08G59/32; C08G59/38; C08G59/40; C08G59/42; H02; H02K; H02K3/00; H02K3/30; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31529; Y10T428/31725; Y10T428/3175
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
133 words
AN INSULATED ELECTRICAL MEMBER FOR USE IN HIGH VOLTAGE EQUIPMENT AND A CURED BODY OF RESINOUS INSULATION APPLIED TO THE MEMBER, THE HIGH VOLTAGE CAPABILITY ISULATION COMPRISING THE CURED RESINOUS REACTION PRODUUCT OF A COMPOSITION CONSISTING ESSENTIALLY OF, BY WEIGHT: A. ABOUT 85 TO 115 PARTS OF A GLYCIDYL ETHER EPOXY RESIN SELECTED FROM THE GROUP CONSISTING OF BISPHENOL A EPOXY RESINS, NOVOLAC EPOXY RESINS AND MIXTURES THEREOF; B. ABOUT 100 TO 155 PARTS OF AN ORGANIC ACID ANHYDRIDE; C. ABOUT 25 TO 95 PARTS OF DIGLYCIDYL ETHER OF NEOPENTYL GYLCOL ACTING AS A REACTIVE DILUENT; AND D. AN EFFECTIVE AMOUNT UP TO ABOUT 0.25 PARTS PER 100 PARTS GLYCIDYL ETHER EPOXY RESIN OF A QUATERNARY ORGANIC PHOSPHONIUM SALT ACTING AS A LATENT CATALYST FOR THE EPOXY RESIN AND HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
133 words
AN INSULATED ELECTRICAL MEMBER FOR USE IN HIGH VOLTAGE EQUIPMENT AND A CURED BODY OF RESINOUS INSULATION APPLIED TO THE MEMBER, THE HIGH VOLTAGE CAPABILITY ISULATION COMPRISING THE CURED RESINOUS REACTION PRODUUCT OF A COMPOSITION CONSISTING ESSENTIALLY OF, BY WEIGHT: A. ABOUT 85 TO 115 PARTS OF A GLYCIDYL ETHER EPOXY RESIN SELECTED FROM THE GROUP CONSISTING OF BISPHENOL A EPOXY RESINS, NOVOLAC EPOXY RESINS AND MIXTURES THEREOF; B. ABOUT 100 TO 155 PARTS OF AN ORGANIC ACID ANHYDRIDE; C. ABOUT 25 TO 95 PARTS OF DIGLYCIDYL ETHER OF NEOPENTYL GYLCOL ACTING AS A REACTIVE DILUENT; AND D. AN EFFECTIVE AMOUNT UP TO ABOUT 0.25 PARTS PER 100 PARTS GLYCIDYL ETHER EPOXY RESIN OF A QUATERNARY ORGANIC PHOSPHONIUM SALT ACTING AS A LATENT CATALYST FOR THE EPOXY RESIN AND HAVING THE STRUCTURAL FORMULA:
Claim 3
Dependent Claim
48 words
The insulated electrical member of claim 1 wherein the bisphenol A epoxy resin component of the insulation has an epoxy equivalent weight of from about 150 to 5,500 and the novolac epoxy resin component of the insulation has an epoxy equivalent weight of from about 100 to 500.
Claim 4
Dependent Claim
28 words
The insulated electrical member of claim 1 wherein the member is a conductor selected from the group consisting of copper and aluminum and the insulation also contains mica.
Claim 5
Dependent Claim
26 words
The insulated electrical member of claim 1 wherein the member is an electrical coil and the insulation comprises a mica tape impregnated with the resinous insulation.
Claim 6
Dependent Claim
41 words
The insulated electrical member of claim 1 wherein the insulation also contains mica and is supported by a backing of a sheet material selected from the group consisting of paper, cotton fabric, asbestos paper, glass fibers, nylon, polyethylene and polyethylene terephthalate.
Claim 7
Dependent Claim
27 words
The insulated electrical member of claim 5 wherein the supported insulation is wrapped around the electrical member and the backing is impregnated with the resinous reaction product.
Claim 8
Dependent Claim
45 words
The insulated electrical member of claim 5 wherein the acid anhydride is selected from the group consisting of hexahydrophthalic anhydride, 1-methyl hexahydrophthalic anhydride, tetrahydrophthalic anhydride, phthalic anhydride, NADIC anhydride, NADIC methyl anhydride, 1-methyltetrahydrophthalic anhydride, pyromellitic anhydride, polyazelaic polyanhydride, benzophenone tetracarboxylic acid dianhydride and mixtures thereof.
Claim 9
Dependent Claim
122 words
An insulated electrical member for use in high voltage equipment and a cured body of resinous insulation applied to the member, the high voltage capability insulation comprising the cured resinous reaction product of a composition consisting essentially of, by weight: A. about 85 to 115 parts of a glycidyl ether epoxy resin selected from the group consisting of bisphenol A epoxy resins, novolac epoxy resins and mixtures thereof; B. about 25 to 95 parts of a diglycidyl ether of neopentyl glycol acting as a reactive diluent; C. an effective amount up to about 0.25 parts per 100 parts glycidyl ether epoxy resin of a quaternary organic phosphonium salt acting as a latent catalyst for the epoxy resin and having the structural formula:
Claim 10
Dependent Claim
122 words
An insulated electrical member for use in high voltage equipment and a cured body of resinous insulation applied to the member, the high voltage capability insulation comprising the cured resinous reaction product of a composition consisting essentially of, by weight: A. about 85 to 115 parts of a glycidyl ether epoxy resin selected from the group consisting of bisphenol A epoxy resins, novolac epoxy resins and mixtures thereof; B. about 25 to 95 parts of a diglycidyl ether of neopentyl glycol acting as a reactive diluent; C. an effective amount up to about 0.25 parts per 100 parts glycidyl ether epoxy resin of a quaternary organic phosphonium salt acting as a latent catalyst for the epoxy resin and having the structural formula:
Claim 11
Dependent Claim
48 words
The insulated electrical member of claim 8 wherein the bisphenol A epoxy resin component of the insulation has an epoxy equivalent weight of from about 150 to 5,500 and the novolac epoxy resin component of the insulation has an epoxy equivalent weight of from about 100 to 500.
Claim 12
Dependent Claim
28 words
The insulated electrical member of claim 8 wherein the member is a conductor selected from the group consisting of copper and aluminum and the insulation also contains mica.
Claim 13
Dependent Claim
26 words
The insulated electrical member of claim 8 wherein the member is an electrical coil and the insulation comprises a mica tape impregnated with the resinous insulation.
Claim 14
Dependent Claim
41 words
The insulated electrical member of claim 8 wherein the insulation also contains mica and is supported by a backing of a sheet material selected from the group consisting of paper, cotton fabric, asbestos paper, glass fibers, nylon, polyethylene and polyethylene terephthalate.
Claim 15
Dependent Claim
27 words
The insulated electrical member of claim 12 wherein the supported insulation is wrapped around the electrical member and the backing is impregnated with the resinous reaction product.
Claim 16
Dependent Claim
45 words
The insulated electrical member of claim 12 wherein the acid anhydride is selected from the group consisting of hexahydrophthalic anhydride, 1-methyl hexahydrophthalic anhydride, tetrahydrophthalic anhydride, phthalic anhydride, NADIC anhydride, NADIC methyl anhydride, 1-methyltetrahydrophthalic anhydride, pyromellitic anhydride, polyazelaic polyanhydride, benzophenone tetracarboxylic acid dianhydride and mixtures thereof.
References Cited (Backward Citations)
US2512996A
Cited
US2768153A
Cited
US3556925A
Cited
US3254150A
Cited
US3547885A
Cited
US3794555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |