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Patent US4478913A successfully refreshed from Google Patents.
US4478913A
Expired / Lapsed
US
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Blended polyesterimide-polyesteramideimide electrical coating compositions
Assignee: Von Roll Isola USA Inc
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Filing: 1982-05-24
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Granted: 1984-10-23
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Expires: 2002-05-24
Abstract
Abstract Electrical coating compositions comprise blended polyesterimides and from 1 to 20 percent by weight of total solids of an ester terminated amide imide. Such compositions provide insulation coatings on electrical conductors which have superior smoothness, even after high speed coating operations.
Inventors
- 👤 Denis R. Pauze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/308; Y; Y10; Y10S; Y10S525/00; Y10S525/928; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
180 words
A soluble coating composition suitable for the insulation of electrical conductors comprising a blend of: A. a polysterimide obtained by heating the following ingredients to a temperature of from about 190° C. to about 250° C., said ingredients comprising: (a) an aromatic diamine; (b) an aromatic carboxylic anhydride containing at least one additional carboxylic group; (c) terephthalic acid or a reactive derivative thereof; (d) a polyhydric alcohol having at least three hydroxyl groups; (e) an alkylene glycol; and B. the polyesteramideimide of this B in a concentration of from about 1 to about 20 percent by weight of the total solids content of the polyesterimide of A above and the polyesteramideimide of this B obtained by heating the following ingredients to a temperature of from about 190° C. to about 250° C., said ingredients comprising (a) a tricarboxylic acid compound; (b) a polyamine; and (c) an aliphatic dicarboxylic acid, (d) and thereafter adding an alkylene clycol to the reaction product of B(a), (b) and (c) when the special product has a carboxyl content is from about 2.5 to about 2.7.
Claim 2
Dependent Claim
180 words
A soluble coating composition suitable for the insulation of electrical conductors comprising a blend of: A. a polysterimide obtained by heating the following ingredients to a temperature of from about 190° C. to about 250° C., said ingredients comprising: (a) an aromatic diamine; (b) an aromatic carboxylic anhydride containing at least one additional carboxylic group; (c) terephthalic acid or a reactive derivative thereof; (d) a polyhydric alcohol having at least three hydroxyl groups; (e) an alkylene glycol; and B. the polyesteramideimide of this B in a concentration of from about 1 to about 20 percent by weight of the total solids content of the polyesterimide of A above and the polyesteramideimide of this B obtained by heating the following ingredients to a temperature of from about 190° C. to about 250° C., said ingredients comprising (a) a tricarboxylic acid compound; (b) a polyamine; and (c) an aliphatic dicarboxylic acid, (d) and thereafter adding an alkylene clycol to the reaction product of B(a), (b) and (c) when the special product has a carboxyl content is from about 2.5 to about 2.7.
Claim 3
Dependent Claim
49 words
A composition as defined in claim 1, wherein the solids content is at least 25 parts by weight per 100 parts by weight of the total composition, and the composition is homogeneously dispersed in a solvent medium comprising predominantly cresylic acid, alone, or in further combination with a hydrocarbon.
Claim 4
Dependent Claim
13 words
A composition as defined in claim 1, which also includes an alkyl titanate.
Claim 5
Dependent Claim
108 words
A coating for electrical wires comprising a blended polyesterimide polyesteramideimide product obtained by separately heating at from about 190° C. to about 250° C. the ingredients of A and B below comprising: A. (a) methylene dianiline; (b) trimellitic anhydride; the molar ratio of (a) and (b) being 2:1; (c) terephthalate acid; (d) tris(2-hydroxyethyl) isocyanurate; and (e) ethylene glycol; and B. (a) trimellitic anhydride; (b) methylene dianiline; (c) azaleic or adipic acid; and, thereafter (d) ethylene glycol until two resins are obtained and blending them together to provide from 1 to 20 percent by weight of B per total weight of the solids of A and B reaction products.
Claim 6
Dependent Claim
108 words
A coating for electrical wires comprising a blended polyesterimide polyesteramideimide product obtained by separately heating at from about 190° C. to about 250° C. the ingredients of A and B below comprising: A. (a) methylene dianiline; (b) trimellitic anhydride; the molar ratio of (a) and (b) being 2:1; (c) terephthalate acid; (d) tris(2-hydroxyethyl) isocyanurate; and (e) ethylene glycol; and B. (a) trimellitic anhydride; (b) methylene dianiline; (c) azaleic or adipic acid; and, thereafter (d) ethylene glycol until two resins are obtained and blending them together to provide from 1 to 20 percent by weight of B per total weight of the solids of A and B reaction products.
Claim 7
Dependent Claim
14 words
An electrical wire enamel as defined in claim 4, which also includes tetraisopropyl titanate.
Claim 8
Dependent Claim
17 words
An electrical conductor provided with a continuous coating of the blended resinous polyesterimide-polyesteramideimide composition of claim 1.
Claim 9
Dependent Claim
16 words
An electrical conductor provided with a continuous coating of the blended resinous polyesterimide-polyesteramideimide of claim 4.
Claim 10
Dependent Claim
36 words
An electrical conductor provided with a continuous coating of the blended resinous polyesterimide-polyesteramideimide composition of claim 1 and a a second continuous coating of a wire enamel of a different type directly covering said polyesterimide-polyesteramideimide coating.
Claim 11
Dependent Claim
34 words
An electrical conductor provided with a continuous coating of the blended resinous polyesterimide-polyesteramideimide of claim 4 and a second continuous coating of a wire enamel of a different type directly covering said polyesterimide-polyesteramideimide coating.
Claim 12
Dependent Claim
38 words
An electrical conductor provided with a continuous coating of a first wire enamel which is free of blended polyesterimide-polyesteramideimide and second coating of high solids content blended polyesterimide-polyesteramideimide composition of claim 1 directly covering said first wire enamel.
Claim 13
Dependent Claim
39 words
An electrical conductor provided with a continuous coating of a first wire enamel which is free of blended polyesterimide-polyesteramideimide and a second coating of the high solids content polyesterimide-polyesteramideimide composition of claim 4 directly covering said first wire enamel.
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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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |