US3917892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solderable and thermostable insulated wires
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1974-01-02
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Granted: 1975-11-04
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Expires: 1994-01-02
Abstract
Abstract A solderable thermostable insulated wire comprising a conductor having a wire enamel coated and baked thereon, the wire enamel comprising mainly the reaction product of (A) a dicarboxylic acid free of a 5-membered imide ring and/or a derivative thereof, (B) a dicarboxylic acid containing a 5-membered imide ring and/or a derivative thereof, (C) a trihydric or higher aliphatic polyhydric alcohol, and (D) a dihydric alcohol, the equivalent proportions of the the components (A), (B) and (C) being 10 to 40 equivalent % for the component (A), 20 to 50 equivalent % for the component (B), and 40 to 55 equivalent % for the component (C).
Inventors
- 👤 Munetaka Kawaguchi
- 👤 Hirohiko Nakabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:33
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G73/00; C08G73/06; C08G73/10; C08G73/16; H01B7/00; H01B7/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
103 words
A SOLDERABLE THERMOSTABLE INSULATED WIRE COMPRISING A CONDUCTOR HAVING A WIRE ENAMEL COATED AND BAKED THEREON, SAID WIRE ENAMEL COMPRISING THE REACTION PRODUCT OF (A) A DICARBOXYLIC ACID FREE OF A 5-MEMBERED IMIDE RING AND/OR A DERIVATIVE THEREOF, (B) A DICARBOXYLIC ACID CONTAINING A 5MEMBERED IMIDE RING AND/OR A DERIVATIVE THEREOF, (C) A TRIHYDRIC OR HIGHER ALIPHATIC POLYHYDRIC ALCOHOL, AND (D) A DIHYDRIC ALCOHOL, THE EQUIVALENT PROPORTIONS OF THE SAID COMPONENTS (A), (B) AND (C) BEING 10 TO 40 EQUIVALENT % FOR SAID COMPONENT (A), 20 TO 50 EQUIVALENT %FOR SAID COMPONENT (B), AND 40 TO 55 EQUIVALENT % FOR SAID COMPONENT (C).
Claim 2
Dependent Claim
103 words
A SOLDERABLE THERMOSTABLE INSULATED WIRE COMPRISING A CONDUCTOR HAVING A WIRE ENAMEL COATED AND BAKED THEREON, SAID WIRE ENAMEL COMPRISING THE REACTION PRODUCT OF (A) A DICARBOXYLIC ACID FREE OF A 5-MEMBERED IMIDE RING AND/OR A DERIVATIVE THEREOF, (B) A DICARBOXYLIC ACID CONTAINING A 5MEMBERED IMIDE RING AND/OR A DERIVATIVE THEREOF, (C) A TRIHYDRIC OR HIGHER ALIPHATIC POLYHYDRIC ALCOHOL, AND (D) A DIHYDRIC ALCOHOL, THE EQUIVALENT PROPORTIONS OF THE SAID COMPONENTS (A), (B) AND (C) BEING 10 TO 40 EQUIVALENT % FOR SAID COMPONENT (A), 20 TO 50 EQUIVALENT %FOR SAID COMPONENT (B), AND 40 TO 55 EQUIVALENT % FOR SAID COMPONENT (C).
Claim 3
Dependent Claim
21 words
The insulated wire of claim 1, wherein said dicarboxylic acid of component (A) is an aromatic, alicyclic or aliphatic dicarboxylic acid.
Claim 4
Dependent Claim
14 words
The insulated wire of claim 2, wherein said dicarboxylic is an aromatic dicarboxylic acid.
Claim 5
Dependent Claim
53 words
The insulated wire of claim 3, wherein said aromatic dicarboxylic acid is isophthalic acid, terephthalic acid, 1,2-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 1,6-naphthalenedicarboxylic acid, 1,7-naphthalenedicarboxylic acid, 1,8-naphthalenedicarboxylic acid, diphenyl-2,2''-dicarboxylic acid, diphenyl-2,3''-dicarboxylic acid, diphenyl-2,4''-dicarboxylic acid, diphenyl, 3,3''-dicarboxylic acid, diphenyl-4,4''-dicarboxylic acid, diphenylmethane-2,2''-dicarboxylic acid, diphenylmethane-4, 4''-dicarboxylic acid, diphenylethane-4,4''-dicarboxylic acid, diphenylsulfone-4,4''-dicarboxylic acid, benzophenone-4,4''-dicarboxylic acid, or diphenyl-2,2-propane-4,4''-dicarboxylic acid.
Claim 6
Dependent Claim
17 words
The insulated wire of claim 2, wherein said dicarboxylic acid of component (A) has the general formula
Claim 7
Dependent Claim
24 words
The insulated wire of claim 5, wherein said dicarboxylic acid is 3-(4-carboxyphenyl)-5-indanecarboxylic acid, 3-(3-carboxyphenyl)-5-indanecarboxylic acid, 3-(3-carboxyphenyl)-1, 1, 3-triethyl-6-indanecarboxylic acid, 3-(4-carboxyphenyl)-1-methyl-1,3-dipropyl-5-indanecarboxylic acid or 3-(4-carboxyphenyl)-1-methyl-1,3-diethyl-6-indanecarboxylic acid.
Claim 8
Dependent Claim
24 words
The insulated wire of claim 2, wherein said aliphatic acid is adipic acid, succinic acid, maleic acid, sebacic acid, isosebacic acid, or dimeric acid.
Claim 9
Dependent Claim
15 words
The insulated wire of claim 2, wherein said alicyclic dicarboxylic acid has the general formula
Claim 10
Dependent Claim
19 words
The insulated wire of claim 8, wherein said alicyclic dicarboxylic acid is hexahydroisophthalic acid, hexahydroterephthalic acid, or bicyclo(2,2,2)octane-1,4-dicarboxylic acid.
Claim 11
Dependent Claim
80 words
The insulated wire of claim 1, wherein said dicarboxylic acid of component (B) comprises the reaction product of an aromatic carboxylic anhydride containing a 5-membered ring carboxylic anhydride group and at least one other reactive group and a primary amine containing a primary amino group and at least one other reactive group or is the reaction product of an aromatic carboxylic anhydride containing a 5-membered ring carboxylic anhydride group and at least one other reactive group and a polyisocyanate compound.
Claim 12
Dependent Claim
20 words
The insulated wire of claim 10, wherein said aromatic carboxylic anhydride is a tricarboxylic acid anhydride or a tetracarboxylic dianhydride.
Claim 13
Dependent Claim
51 words
The insulated wire of claim 11, wherein said aromatic carboxylic anhydride is trimellitic anhydride, hemi-trimellitic anhydride, 1,2,5-naphthalenetricarboxylic anhydride, 2,3,6-naphthalenetricarboxylic anhydride, 1,8,4-naphthalenetricarboxylic anhydride, 3,4,4''-diphenyltricarboxylic anhydride, 3,4,4''-diphenylmethanetricarboxylic anhydride,3,4,4''-diphenylether tricarboxylic anhydride, 3,4,4''-benzophenonetricarboxylic anhydride, pyromellitic dianhydride, 2, 3,6,7-naphthalenetetracarboxylic dianhydride, 1,8,4,5-naphthalenetetracarboxylic dianhydride, 1,2,5,6-naphthalenetetracarboxylic cianhydride, 3,3'',4,4''-diphenyltetracarboxylic dianhydride, 2,2'', 3,3''-diphenyltetracarboxylic dianhydride, 3,3'',4,4''-diphenylethertetracarboxylic dianhydride, 3,3'',4,4''-diphenylmethanetetracarboxylic dianhydride, or 3,3'',4,4''-benzophenonetetracarboxylic dianhydride.
Claim 14
Dependent Claim
54 words
The insulated wire of claim 10, wherein said compound containing said primary amino group is 4,4''-diaminodiphenyl methane, 4,4''-diaminodiphenyl ether, benzidine, 3,3''-diaminodiphenyl, 1,4-diaminonaphthalene, m-phenylene diamine, p-phenylene diamine, Alpha , omega -nonamethylene diamine, 1,7-dimethylheptamethylene diamine, 4,4''-diaminodiphenyl ketone, bis-(4-aminophenyl)- Alpha , Alpha ''-p-xylene, tolylene diamine, xylylene diamine, hexamethylene diamine, ethylene diamine, 4,4''-dicyclohexylmethane diamine, or diaminodiphenyl sulfone benzoguanamine.
Claim 15
Dependent Claim
50 words
The insulated wire of claim 10, wherein said polyisocyanate compound is m-phenylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, diphenyl ether-4,4''-diisocyanate, diphenylmethane-4,4''-diisocyanate, diphenylmethane-2,4''-diisocyanate, diphenylmethane-2,2''-diisocyanate, diphenylsulfone-4,4''-diisocyanate, diphenylthioether-4,4''-diisocyanate, naphthalenediisocyanate, polymethylenepolyphenylene polyisocyanate, hexamethylene diisocyanate, or xylylene diisocyanate; or a stabilized isocyanate obtained by stabilizing the isocyanate groups of these polyisocyanates with a phenolic hydroxyl group.
Claim 16
Dependent Claim
17 words
The insulated wire of claim 1, wherein said dicarboxylic acid of component (B) has the general formula
Claim 17
Dependent Claim
23 words
The insulated wire of claim 1, wherein said aliphatic polyhydric alcohol is glycerol, pentaerythritol, 1,1,1-trimethylolethane, 1,1,1-trimethylol propane, sorbitol, mannitol, dipentaerythritol, diglycerol, or 1,2,6-hexanetriol.
Claim 18
Dependent Claim
55 words
The insulated wire of claim 1, wherein said dihydric alcohol of said component (D) is ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propanediol, butanediol-1,3 or 1,1,pentanediol-1,5,hexanediol-1,6, butene-2-diol-1,4, 2,2-dimethylpropanediol-1,3-2-ethyl-2-butylpropanediol-1,8, 1,4-dimethylolcyclohexane, butenediol-1,4, a hydrogenated bisphenol,2,2,4,4-tetramethyl-1,3-cyclobutanediol, hydroquinone-di- Beta -hydroxyethyl-ether, 1,4-cyclohexanedimethanol, 1,4-cyclohexane diethanol diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, trimethylene glycol, hexylene glycol, or octylene glycol.
Claim 19
Dependent Claim
17 words
The insulated wire of claim 1, including a polyamide insulation layer on said wire enamel coated layer.
Claim 20
Dependent Claim
13 words
The insulated wire of claim 18, wherein said polyamide is 6-nylon or 6,6-nylon.
Claim 21
Dependent Claim
16 words
A self-bonding magnet wire comprising the insulated wire of claim 1 having a self-bonding layer thereon.
Claim 22
Dependent Claim
26 words
The self-bonding magnetic wire of claim 20, wherein said self-bonding layer comprises a layer of polyvinyl butyral resin, phenoxy resin, polyamide resin, or a polysulfone resin.
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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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |