US5384197A
Expired / Lapsed
US
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Superconducting magnet coil and curable resin composition used therein
Assignee: Hitachi Ltd
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Filing: 1993-12-22
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Granted: 1995-01-24
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Expires: 2013-12-22
Abstract
Abstract A superconducting magnet coil contains a coil of superconducting wire and a cured product of a curable resin composition with which the coil has been impregnated, the cured product having a thermal shrinkage factor of 1.5-0.3%, preferably 1.0-0.3%, when cooled from the glass transition temperature to 4.2K, a bend-breaking strain of 2.9-3.9%, preferably 3.2-3.9%, at 4.2K and a modulus of 500-1,000 kg/mm2 at 4.2K, or undergoing a thermal stress of 0-10 kg/mm2 when cooled from the glass transition temperature to 4.2K and resisting to quench during superconducting operation. It is produced by winding a superconducting wire to form a coil; impregnating the coil with a curable resin composition of low viscosity which contains for example at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F and diglycidyl ether of bisphenol AF, all having a number-average molecular weight of 350-1,000, a flexibilizer and a curing catalyst, to obtain a curable-resin composition-impregnated coil; and heating the curable-resin-composition-impregnated coil to cure the composition.
Inventors
- 👤 Toru Koyama
- 👤 Koo Honjo
- 👤 Masao Suzuki
- 👤 Akio Takahashi
- 👤 Akio Mukoh
- 👤 Keiji Fukushi
- 👤 Seiji Numata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:48
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/06; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/704; Y10S505/705; Y10S505/80; Y10S505/812; Y10S505/813; Y10S505/825; Y10S505/884; Y10S505/887; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721; Y10T428/31725
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
154 words
A superconducting magnet coil which comprises a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting said thin superconducting wires; and a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product having a thermal shrinkage factor of 1.5-0.3% when cooled from the glass transition temperature to 4.2K, a bend-breaking strain of 2.9-3.9% at 4.2K and a modulus of 500-1,000 kg/m 2 at 4.2K.
Claim 2
Dependent Claim
154 words
A superconducting magnet coil which comprises a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting said thin superconducting wires; and a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product having a thermal shrinkage factor of 1.5-0.3% when cooled from the glass transition temperature to 4.2K, a bend-breaking strain of 2.9-3.9% at 4.2K and a modulus of 500-1,000 kg/m 2 at 4.2K.
Claim 3
Dependent Claim
155 words
A superconducting magnet coil which comprises a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting said thin superconducting wires; and a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured resin composition having a thermal shrinkage factor of 1.5-0.3% when cooled from the glass transition temperature to 4.2K, a bend-breaking strain of 3.2-3.9% at 4.2K and a modulus of 500-1,000 kg/mm 2 at 4.2K.
Claim 4
Dependent Claim
155 words
A superconducting magnet coil which comprises a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting said thin superconducting wires; and a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured resin composition having a thermal shrinkage factor of 1.5-0.3% when cooled from the glass transition temperature to 4.2K, a bend-breaking strain of 3.2-3.9% at 4.2K and a modulus of 500-1,000 kg/mm 2 at 4.2K.
Claim 5
Dependent Claim
44 words
The superconducting magnet coil of claim 1 or 2, wherein the thin superconducting wires are covered with at least one member selected from the group consisting of a polyvinyl formal, a polyvinyl butyral, a polyester, a polyurethane, a polyamide, a polyamide-imide and a polyimide.
Claim 6
Dependent Claim
43 words
The superconducting magnet coil of claim 1 or 2, wherein the thin superconducting wire are covered with at least one film selected from the group consisting of a polyester film, a polyurethane film, a polyamide film, a polyamide-imide film and a polyimide film.
Claim 7
Dependent Claim
20 words
The superconducting magnet coil of claim 1 or 2, wherein the thin superconducting wire are made of a Nb--Ti alloy.
Claim 8
Dependent Claim
30 words
The superconducting magnet coil of claim 1 or 2, wherein the curable resin composition comprises: (a) said at least one epoxy resin (b) a flexibilizer, and (c) a curing catalyst.
Claim 9
Dependent Claim
146 words
A superconducting magnet coil which comprises a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting said thin superconducting wires; and a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product undergoing a thermal stress of 0-10 kg/mm 2 when cooled from the glass transition temperature to 4.2K and resisting to quench during superconducting operation.
Claim 10
Dependent Claim
146 words
A superconducting magnet coil which comprises a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting said thin superconducting wires; and a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product undergoing a thermal stress of 0-10 kg/mm 2 when cooled from the glass transition temperature to 4.2K and resisting to quench during superconducting operation.
Claim 11
Dependent Claim
156 words
A superconducting magnet coil which comprises: (a) a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting the thin superconducting wires, and (b) a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product having a thermal shrinkage factor of 1.5-0.3% when cooled from the glass transition temperature of 4.2K, a bend-breaking strain of 2.9-4.5% at 4.2K and a modulus of 500-1,000 kg/m 2 at 4.2K.
Claim 12
Dependent Claim
156 words
A superconducting magnet coil which comprises: (a) a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting the thin superconducting wires, and (b) a cured product of a curable resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product having a thermal shrinkage factor of 1.5-0.3% when cooled from the glass transition temperature of 4.2K, a bend-breaking strain of 2.9-4.5% at 4.2K and a modulus of 500-1,000 kg/m 2 at 4.2K.
Claim 13
Dependent Claim
46 words
The superconducting magnet coil of claim 8, wherein the thin superconducting wires each is made of a Nb--Ti alloy and is covered with at least one film selected from the group consisting of a polyester film, a polyurethane film, a polyamide-imide film and a polyimide film.
Claim 14
Dependent Claim
147 words
A superconducting magnet coil which comprises: (a) a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting the thin superconducting wires, and (b) a cured product of a resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product undergoing a thermal stress of 0-10 kg/mm 2 when cooled from the glass transition temperature to 4.2K and resisting the quench during superconducting operation.
Claim 15
Dependent Claim
147 words
A superconducting magnet coil which comprises: (a) a coil of a composite superconductor comprising a plurality of thin superconducting wires made of an alloy or intermetallic compound selected from the group consisting of an Nb--Ti alloy, Nb 3 Sn, Nb 3 Al and V 3 Ga, and a stabilizer selected from the group consisting of copper and aluminum contacting the thin superconducting wires, and (b) a cured product of a resin composition comprising at least one epoxy resin selected from the group consisting of diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F, diglycidyl ether of bisphenol AF and diglycidyl ether of bisphenol AD, all having a number-average molecular weight of 1,000-50,000, with which the coil has been impregnated, the cured product undergoing a thermal stress of 0-10 kg/mm 2 when cooled from the glass transition temperature to 4.2K and resisting the quench during superconducting operation.
References Cited (Backward Citations)
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Cited
EP0076887A1
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US4595898A
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US5177056A
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US5047741A
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US5168259A
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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) | 1998-01-23 | 1998-07-25 | 1999-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-23 | 2002-07-25 | 2003-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-23 | 2006-07-25 | 2007-01-24 | $7700.00 | Window Closed / Lapsed |