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US4012555A
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Self-bonding varnish for magnet wires comprising a combination of a polyalkylenetrimellitate imide and a polyalkylenetrimellitate ester imide
Assignee: BP Corp North America Inc
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Filing: 1976-02-23
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Granted: 1977-03-15
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Expires: 1996-02-23
Abstract
Abstract Mixtures of polyalkylenetrimellitate imides and polyalkylenetrimellitate ester imides suitable for use as self-bonding varnish coatings for magnet wire.
Inventors
- 👤 Robert G. Keske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:01
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1042; C08G73/16; C08L; C08L79/00; C08L79/04; C08L79/08; C09; C09D; C09D179/00; C09D179/04; C09D179/08; Y; Y10; Y10S; Y10S525/00; Y10S525/928; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A composition comprising a polyalkylenetrimellitate imide and a polyalkylenetrimellitate ester imide having a weight ratio of from about 1:19 to 19:1 of the respective polymers wherein said polyalkylenetrimellitate ester imide has the structure ##STR4##wherein each R and each R' is independently an alkylene group of 2-12 carbon atoms and n is a number sufficient to provide a polymer having an I.V. of at least 0.3 dl/g.
Claim 2
Dependent Claim
66 words
A composition comprising a polyalkylenetrimellitate imide and a polyalkylenetrimellitate ester imide having a weight ratio of from about 1:19 to 19:1 of the respective polymers wherein said polyalkylenetrimellitate ester imide has the structure ##STR4##wherein each R and each R' is independently an alkylene group of 2-12 carbon atoms and n is a number sufficient to provide a polymer having an I.V. of at least 0.3 dl/g.
Claim 3
Dependent Claim
18 words
The composition of claim 1, wherein each of said polymers has an I.V. of at least 0.4 dl/g.
Claim 4
Dependent Claim
13 words
The composition of claim 1, wherein R' comprises ethylene and R comprises hexamethylene.
Claim 5
Dependent Claim
21 words
The composition of claim 1, wherein the weight ratio of polyalkylenetrimellitate imide to polyalkylenetrimellitate ester imide is from 1:4 to 4:1.
Claim 6
Dependent Claim
13 words
The composition of claim 1, wherein said polyalkylenetrimellitate imide comprises a polyethylenetrimellitate imide.
Claim 7
Dependent Claim
14 words
The composition of claim 4 and wherein R' comprises ethylene and R comprises hexamethylene.
Claim 8
Dependent Claim
15 words
Magnet wire bearing a continuous self-bonding varnish top coat comprising the composition of claim 1.
Claim 9
Dependent Claim
15 words
Magnet wire bearing a continuous self-bonding varnish top coat comprising the composition of claim 2.
Claim 10
Dependent Claim
15 words
Magnet wire bearing a continuous self-bonding varnish top coat comprising the composition of claim 3.
Claim 11
Dependent Claim
15 words
Magnet wire bearing a continuous self-bonding varnish top coat comprising the composition of claim 4.
Claim 12
Dependent Claim
15 words
Magnet wire bearing a continuous self-bonding varnish top coat comprising the composition of claim 5.
Claim 13
Dependent Claim
15 words
Magnet wire bearing a continuous self-bonding varnish top coat comprising the composition of claim 6.
Claim 14
Dependent Claim
28 words
The article of claim 7 wherein said magnet wire bears at least one enamel subbing layer selected from the group consisting of polyester, polyester imide, polyimide and polyamideimide.
Claim 15
Dependent Claim
23 words
The article of claim 13 wherein a polyamideimide enamel subbing layer is in direct contact with the top coat polymer of claim 1.
References Cited (Backward Citations)
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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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |