US4324837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-bonding magnet wire
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1980-06-27
•
Granted: 1982-04-13
•
Expires: 2000-06-27
Abstract
Abstract A self-bonding magnet wire produced by coating an insulated conductor with an enamel composition consisting essentially of a thermoplastic linear polyurethane prepared by reacting a glycolic component comprising polyoxyalkylene glycol or polyoxyalkylene glycol and alkylene glycol with an aromatic diisocyanate and baking the coated conductor.
Inventors
- 👤 Masayoshi Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:06
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/302; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206; H01B3/308; H02; H02K; H02K3/00; H02K3/30; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
131 words
A self-bonding magnet wire, comprising: an insulated conductor; and a coating over said insulated conductor of an enamel composition consisting essentially of a thermoplastic linear polyurethane prepared by reacting a glycolic component comprising (a) polyoxyalkylene glycol, (b) alkylene glycol, and (c) aromatic diisocyanate, and baking the coated insulated conductor, wherein the molar ratio of components (a), (b) and (c) is such that 0.92≦(c)/{(a)+(b)}≦1.01, and 0.1≦(a)/{(a)+(b)}≦1.0, wherein (a) is the number of moles of polyoxyalkylene glycol represented by the formula HO--(CH 2 ) n O m H and (b) is the number of moles of alkylene glycol represented by the formula HO--CH 2 ) l OH, and the values of n, m, and l are such that the value of the equation {(mn+m-1)×(a)+l×(b)}/{(a)+(b)} is in the range of from 4.0 to 8.5.
Claim 2
Dependent Claim
131 words
A self-bonding magnet wire, comprising: an insulated conductor; and a coating over said insulated conductor of an enamel composition consisting essentially of a thermoplastic linear polyurethane prepared by reacting a glycolic component comprising (a) polyoxyalkylene glycol, (b) alkylene glycol, and (c) aromatic diisocyanate, and baking the coated insulated conductor, wherein the molar ratio of components (a), (b) and (c) is such that 0.92≦(c)/{(a)+(b)}≦1.01, and 0.1≦(a)/{(a)+(b)}≦1.0, wherein (a) is the number of moles of polyoxyalkylene glycol represented by the formula HO--(CH 2 ) n O m H and (b) is the number of moles of alkylene glycol represented by the formula HO--CH 2 ) l OH, and the values of n, m, and l are such that the value of the equation {(mn+m-1)×(a)+l×(b)}/{(a)+(b)} is in the range of from 4.0 to 8.5.
Claim 3
Dependent Claim
21 words
A self-bonding magnet wire according to claim 1 wherein the value of {(mn+m-1)×(a)+l×(b)}/{(a)+(b)} in the range of from 4.0 to 7.5.
Claim 4
Dependent Claim
32 words
A self-bonding magnet wire according to claim 1 wherein the polyoxyalkylene glycol is represented by the formula HO(CH.sub.2).sub.n O.sub.m H wherein n is 2 or 3, and m is 2 or 3.
Claim 5
Dependent Claim
15 words
A self-bonding magnet wire according to claim 1 wherein the polyoxyalkylene glycol is diethylene glycol.
Claim 6
Dependent Claim
15 words
A self-bonding magnet wire according to claim 1 wherein the polyoxyalkylene glycol is triethylene glycol.
Claim 7
Dependent Claim
15 words
A self-bonding magnet wire according to claim 1 wherein the polyoxyalkylene glycol is dipropylene glycol.
Claim 8
Dependent Claim
28 words
A self-bonding magnet wire according to claim 1 wherein the alkylene glycol is represented by the formula HO--CH.sub.2).sub.l OH, wherein l is an integer of 2 to 8.
Claim 9
Dependent Claim
14 words
A self-bonding magnet wire according to claim 1 wherein the alkylene glycol is 1,6-hexanediol.
Claim 10
Dependent Claim
14 words
A self-bonding magnet wire according to claim 1 wherein the alkylene glycol is 1,4-butanediol.
Claim 11
Dependent Claim
15 words
A self-bonding magnet wire according to claim 1 wherein the aromatic diisocyanate is 4,4'-diphenylmethane diisocyanate.
Claim 12
Dependent Claim
40 words
A self-bonding magnet wire according to claim 1 wherein the thermoplastic linear polyurethane has a reduced specific viscosity not less than 0.3 dl/g for an amount of 0.5 g of the resin in 100 ml of N,N-dimethylacetamide at 30° C.
Claim 13
Dependent Claim
24 words
A self-bonding magnet wire according to claim 1 wherein the insulator of the insulated conductor is of the type used in a hermetic motor.
Claim 14
Dependent Claim
18 words
A self-bonding magnet wire according to claim 1 wherein the insulator of the insulated conductor is a polyamideimide.
Claim 15
Dependent Claim
21 words
A self-bonding magnet wire according to claim 1 wherein the insulator of the insulated conductor is a polyesterimide overcoated with polyamideimide.
Claim 16
Dependent Claim
33 words
A self-bonding magnet wire according to claim 1 or 4 wherein the polyoxyalkylene glycol is represented by the formula HO(CH.sub.2).sub.n O.sub.m H, wherein n is 2 or 3, and is 2 or 3.
Claim 17
Dependent Claim
17 words
A self-bonding magnet wire according to claim 1 or 4 wherein the polyoxyalkylene glycol is diethylene glycol.
Claim 18
Dependent Claim
17 words
A self-bonding magnet wire according to claim 1 or 4 wherein the polyoxyalkylene glycol is triethylene glycol.
Claim 19
Dependent Claim
17 words
A self-bonding magnet wire according to claim 1 or 4, wherein the polyoxyalkylene glycol is dipropylene glycol.
Claim 20
Dependent Claim
31 words
A self-bonding magnet wire according to claim 1 or 4 wherein the alkylene glycol is represented by the formula HO--CH.sub.2).sub.l OH, wherein l is an integer of from 2 to 8.
Claim 21
Dependent Claim
16 words
A self-bonding magnet wire according to claim 1 or 4, wherein the alkylene glycol is 1,6-hexanediol.
Claim 22
Dependent Claim
16 words
A self-bonding magnet wire according to claim 1 or 4, wherein the alkylene glycol is 1,4-butanediol.
Claim 23
Dependent Claim
40 words
A self-bonding magnet wire according to claim 12 wherein the insulator of the insulated conductor is selected from the group consisting of polyamideimide, poly(vinyl formal), polyesterimide overcoated with polyamideimide, polyamideimide overcoated with polyesterimide, polyimide overcoated with poly(vinyl formal) and polyesteramideimide.
References Cited (Backward Citations)
US2929800A
Cited
US2871226A
Cited
US3207626A
Cited
US3300843A
Cited
US3105775A
Cited
US3361593A
Cited
US3393177A
Cited
GB1195886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |