US4206261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble polyester imide resin wire coating process
Assignee: SI Group Inc
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Filing: 1979-05-16
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Granted: 1980-06-03
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Expires: 1999-05-16
Abstract
Abstract Water soluble polyester-imide prepolymers are prepared (1) having 5 to 60%, preferably at least 35%, of imide moieties, (2) an excess hydroxyl content in excess of 60% and preferably more than 100%, and (3) a number average molecular weight of 600-1300. To water solubilize the prepolymers formed, there are added amines, preferably tertiary amines. The products are useful as wire enamels. To enhance the thermoplastic flow of the enamel, there are added organic titanates.
Inventors
- 👤 Deno Laganis
- 👤 Paul M. Begley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:00
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31551; Y10T428/31605; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
145 words
A process for the production of an insulating coating on an electrical conductor comprising coating the conductor by an aqueous solution of a water soluble thermosetting second polyester-imide prepolymer prepared by reacting reactants consisting essentially of a tertiary amine and a first polyester-imide prepolymer having a number average molecular weight of 600-1300, an OH:COOH ratio of from 1.8:1 to 2.5:1 and an imide content of 5 to 60% based on the total imide and ester moieties, the alcohol of the ester moiety consisting essentially of 10 to 90% of the total equivalents of dihydric alcohol and the balance of the alcohol containing at least three hydroxyl groups, the acid component of the ester moiety consisting essentially of dicarboxylic acid, the imide moiety consisting essentially of the reaction product of approximately two moles of an aromatic monocarboxylic acid monoanhydride with one mole of an aromatic diamine.
Claim 2
Dependent Claim
145 words
A process for the production of an insulating coating on an electrical conductor comprising coating the conductor by an aqueous solution of a water soluble thermosetting second polyester-imide prepolymer prepared by reacting reactants consisting essentially of a tertiary amine and a first polyester-imide prepolymer having a number average molecular weight of 600-1300, an OH:COOH ratio of from 1.8:1 to 2.5:1 and an imide content of 5 to 60% based on the total imide and ester moieties, the alcohol of the ester moiety consisting essentially of 10 to 90% of the total equivalents of dihydric alcohol and the balance of the alcohol containing at least three hydroxyl groups, the acid component of the ester moiety consisting essentially of dicarboxylic acid, the imide moiety consisting essentially of the reaction product of approximately two moles of an aromatic monocarboxylic acid monoanhydride with one mole of an aromatic diamine.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein the composition includes a minor amount of a water soluble solvent.
Claim 4
Dependent Claim
16 words
A process according to claim 3 wherein the composition includes a water soluble titanate curing agent.
Claim 5
Dependent Claim
15 words
A process according to claim 3 wherein the aromatic monocarboxylic acid monoanhydride is trimellitic anhydride.
Claim 6
Dependent Claim
17 words
A process according to claim 4 wherein the alcohol of the ester moiety comprises tris (hydroxyethyl) isocyanurate.
Claim 7
Dependent Claim
19 words
A process according to claim 5 wherein the acid of the ester moiety comprises terephthalic acid or isophthalic acid.
Claim 8
Dependent Claim
16 words
A process according to claim 6 wherein the acid of the ester moiety comprises terephthalic acid.
Claim 9
Dependent Claim
28 words
A process according to claim 7 wherein the acid of the ester moiety comprises a diimide dicarboxylic acid wherein the imide groups are contained in five-membered imide rings.
Claim 10
Dependent Claim
27 words
A process according to claim 8 wherein the imide moiety is the imide of 2 moles of trimellitic anhydride and 1 mole of oxydianiline or methylene dianiline.
Claim 11
Dependent Claim
22 words
A process according to claim 9 wherein the imide moiety is 35 to 55% of the total of imide and ester moieties.
Claim 12
Dependent Claim
16 words
A process according to claim 10 wherein the ratio of OH:COOH is from 2.20 to 2.50:1.
Claim 13
Dependent Claim
17 words
A process according to claim 11 wherein the aqueous composition includes a titanate curing agent for polyesters.
Claim 14
Dependent Claim
31 words
A process according to claim 12 wherein the alcohol having at least three hydroxyl groups is tris (hydroxyethyl) isocyanurate, glycerine, trimethlol propane, 1,2,6-hexanetriol, pentaerythritol, trimethylol ethane or 3-methyl-1,3,5-hexanetriol or mixtures thereof.
Claim 15
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 1.
Claim 16
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 2.
Claim 17
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 3.
Claim 18
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 4.
Claim 19
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 5.
Claim 20
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 6.
Claim 21
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 7.
Claim 22
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 8.
Claim 23
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 9.
Claim 24
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 10.
Claim 25
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 11.
Claim 26
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 12.
Claim 27
Dependent Claim
11 words
A coated electrical conductor prepared by the process of claim 13.
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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) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |