US5350815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper bonding epoxy resin compositions, resin coated copper articles and method
Assignee: General Electric Co
•
Filing: 1993-05-21
•
Granted: 1994-09-27
•
Expires: 2013-05-21
Abstract
Abstract A bare copper conductor is provided with a tenaciously adhering epoxy resin by heating and curing in situ on the conductor a coating of a solution of cycloaliphatic epoxy resin, a hardener, stannous octoate as a catalyst, and a phenolic accelerator.
Inventors
- 👤 Mark Markovitz
- 👤 William E. Tomak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:39
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08G59/40; C08G59/42; C08G59/4215; C08G59/68; C08G59/681; C08G59/685; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
An article of manufacture comprising a copper wire covered by a tightly-adhering, electrically-insulating, thermosetting composition coating which is hard, glassy and cracks but does not flake when the wire is bent around a 0.50 inch mandrel, the coverd wire being made by coating the wire with a solventless clear solution of a composition consisting essentially of 35 to 65% of 3,4 epoxy cyclohexylmethyl-(3,4 epoxy) cyclohexane carboxylate resin, 65 to 35% of a hardener for the epoxy resin selected from the group consisting of a dimerized unsaturated fatty acid and a trimerized unsaturated fatty acid and mixtures thereof, and a small but effective amount of stannous octoate catalyst and 0-3% of phenolic accelerator, and curing the said composition by heating the copper wire and the coating thereon.
Claim 2
Dependent Claim
126 words
An article of manufacture comprising a copper wire covered by a tightly-adhering, electrically-insulating, thermosetting composition coating which is hard, glassy and cracks but does not flake when the wire is bent around a 0.50 inch mandrel, the coverd wire being made by coating the wire with a solventless clear solution of a composition consisting essentially of 35 to 65% of 3,4 epoxy cyclohexylmethyl-(3,4 epoxy) cyclohexane carboxylate resin, 65 to 35% of a hardener for the epoxy resin selected from the group consisting of a dimerized unsaturated fatty acid and a trimerized unsaturated fatty acid and mixtures thereof, and a small but effective amount of stannous octoate catalyst and 0-3% of phenolic accelerator, and curing the said composition by heating the copper wire and the coating thereon.
Claim 3
Dependent Claim
33 words
The article of claim 1 in which the thermosetting resin composition contains about 45 parts of the epoxy resin and about 50 parts of the hardener, and about 2.0 parts of stannous octoate.
Claim 4
Dependent Claim
14 words
The article of claim 2 in which the hardener is dimerized unsaturated fatty acid.
Claim 5
Dependent Claim
19 words
The article of claim 1 in which the resin composition contains about 1% stannous octoate and about 1/2% catechol.
Claim 6
Independent Claim
132 words
The method of producing an electrically insulated copper wire which comprises the steps of providing a copper body having an oil film-free surface portion, preparing a solventless thermoserring resin composition which is a liquid solution at 25° C. and consists essentially of about 35 to 65% 3,4 epoxy cyclohexylmethyl- (3,4 epoxy) cyclohexane carboxylate resin and about 65 to 35% of a hardener for the epoxy resin selected from the group consisting of a dimerized unsaturated fatty acid and a trimerized unsaturated fatty acid and mixtures thereof and a small but effective amount of stannous octoate catalyst and 0 to 3% of phenolic accelerator, covering the oil film-free surface portion of the copper wire with the liquid resin solution, and finally heating the copper wire and curing the resin covering thereon in situ.
Claim 7
Independent Claim
132 words
The method of producing an electrically insulated copper wire which comprises the steps of providing a copper body having an oil film-free surface portion, preparing a solventless thermoserring resin composition which is a liquid solution at 25° C. and consists essentially of about 35 to 65% 3,4 epoxy cyclohexylmethyl- (3,4 epoxy) cyclohexane carboxylate resin and about 65 to 35% of a hardener for the epoxy resin selected from the group consisting of a dimerized unsaturated fatty acid and a trimerized unsaturated fatty acid and mixtures thereof and a small but effective amount of stannous octoate catalyst and 0 to 3% of phenolic accelerator, covering the oil film-free surface portion of the copper wire with the liquid resin solution, and finally heating the copper wire and curing the resin covering thereon in situ.
Claim 8
Dependent Claim
26 words
The method of claim 5 in which the stannous octoate is in amount of about 2% and the accelerator is catechol in amount of about 1%.
Claim 9
Dependent Claim
51 words
The method of claim 5 in which the resin composition contains about equal amounts of the epoxy resin and the hardener, about 1% stannous octoate and about 1/2% catechol, and in which the resin coated copper body is heated to about 150° C. for about 15 minutes as the curing step.
Claim 10
Independent Claim
150 words
The method of producing an electrically insulated copper wire which comprises the steps of providing an as-received copper wire, preparing a solventless thermosetting resin composition which is a liquid solution at 25° C. and consists essentially of about 35 to 65% 3,4 epoxy cyclohexylmethyl--(3,4 epoxy) cyclohexane carboxylate and about 65 to 35% a hardener for the epoxy resin selected from the group consisting essentially of a dimerized unsaturated fatty and a trimerized unsaturated fatty acid and mixtures thereof and a small but effective amount of stannous octoate catalyst and 0 to 3% of phenolic accelerator, covering the surface of the as-received copper wire with the liquid resin solution, and finally heating the copper wire and curing the resin covering thereon is situ and thereby producing a coating on the wire which is hard, glassy and cracks but does not flake when the wire is bent around a 0.50 inch mandrel.
Claim 11
Independent Claim
150 words
The method of producing an electrically insulated copper wire which comprises the steps of providing an as-received copper wire, preparing a solventless thermosetting resin composition which is a liquid solution at 25° C. and consists essentially of about 35 to 65% 3,4 epoxy cyclohexylmethyl--(3,4 epoxy) cyclohexane carboxylate and about 65 to 35% a hardener for the epoxy resin selected from the group consisting essentially of a dimerized unsaturated fatty and a trimerized unsaturated fatty acid and mixtures thereof and a small but effective amount of stannous octoate catalyst and 0 to 3% of phenolic accelerator, covering the surface of the as-received copper wire with the liquid resin solution, and finally heating the copper wire and curing the resin covering thereon is situ and thereby producing a coating on the wire which is hard, glassy and cracks but does not flake when the wire is bent around a 0.50 inch mandrel.
Claim 12
Dependent Claim
23 words
The method of claim 8 including the preliminary step of wiping the as received copper body and thereby removing any oil film therefrom.
Claim 13
Dependent Claim
70 words
The method of claim 8 in which the resin composition contains about 45 parts by weight of the epoxy resin, about 50 parts by weight of the hardener, one part by weight of stannous octoate and 0.45 part by weight of catechol, and in which the coated wire heating step is conducted for three minutes at 150° C. to cure the resin to hard solid bonded securely to the wire.
References Cited (Backward Citations)
US3219602A
Cited
US3812214A
Cited
US4017432A
Cited
US4486558A
Cited
US4603182A
Cited
US4661562A
Cited
US4792479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-26 | 1998-03-28 | 1998-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-26 | 2002-03-28 | 2002-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-26 | 2006-03-28 | 2006-09-27 | $7700.00 | Window Closed / Lapsed |