US4297310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing electric conductors coated with crosslinked polyethylene resin
Assignee: Mitsubishi Chemical Corp
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Filing: 1979-11-13
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Granted: 1981-10-27
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Expires: 1999-11-13
Abstract
Abstract A conductor wire is extrusion coated with a polyethylene resin containing a copolymer comprising predominantly ethylene and an unsaturated silane compound having the formula R Si R'nY3-n, wherein: R is an ethylenically unsaturated hydrocarbyl group or hydrocarbyloxy group; R' is an aliphatic saturated hydrocarbyl group; Y is a hydrolyzable organic group; and n is zero, 1, or 2, thereby to fabricate a coated wire which is then caused to contact water in the presence of a silanol condensation catalyst in a crosslinking process step.
Inventors
- 👤 Susumu Akutsu
- 👤 Tsutomu Isaka
- 👤 Mitsugu Ishioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:10
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08L; C08L43/00; C08L43/04; H01B13/00; H01B13/06; H01B13/14; H01B3/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
A process for producing electric conductors coated with a crosslinked polyethylene resin which comprises fabricating a coated electric conductor having an extrusion-coated layer of a polyethylene resin comprising a random copolymer on a conductor, the copolymer comprising predominantly units of ethylene monomer and an unsaturated silane monomer represented by the formula RSiR' n Y 3-n , wherein: R is a member selected from the group consisting of ethylenically unsaturated hydrocarbyl and hydrocarbyloxy groups; R' is an aliphatic saturated hydrocarbyl group; Y is a hydrolyzable organic group; and n is zero, 1, or 2, and subjecting the coated conductor to a crosslinking process step comprising causing the coated conductor to contact water in the presence of a silanol condensation catalyst, said random copolymer having been produced by the polymerization of said monomers in the presence of a radical initiator under elevated pressure.
Claim 2
Dependent Claim
141 words
A process for producing electric conductors coated with a crosslinked polyethylene resin which comprises fabricating a coated electric conductor having an extrusion-coated layer of a polyethylene resin comprising a random copolymer on a conductor, the copolymer comprising predominantly units of ethylene monomer and an unsaturated silane monomer represented by the formula RSiR' n Y 3-n , wherein: R is a member selected from the group consisting of ethylenically unsaturated hydrocarbyl and hydrocarbyloxy groups; R' is an aliphatic saturated hydrocarbyl group; Y is a hydrolyzable organic group; and n is zero, 1, or 2, and subjecting the coated conductor to a crosslinking process step comprising causing the coated conductor to contact water in the presence of a silanol condensation catalyst, said random copolymer having been produced by the polymerization of said monomers in the presence of a radical initiator under elevated pressure.
Claim 3
Dependent Claim
25 words
A process according to claim 1 in which the unsaturated silane compound is a compound selected from the group consisting of vinyltrimethoxysilane, vinyltriethoxysilane, and vinyltriacetoxysilane.
Claim 4
Dependent Claim
34 words
A process according to any one of claims 1 through 2 in which the unsaturated silane compound is used in quantity of 0.01 to 15 percent by weight of the quantity of the copolymer.
Claim 5
Dependent Claim
49 words
A process according to any one of claims 1 or 2 in which the silanol condensation catalyst is added beforehand to the polyethylene resin comprising the copolymer prior to the fabricating of the coated conductor having the extrusion-coated layer of the polyethylene resin comprising the copolymer on the conductor.
Claim 6
Dependent Claim
27 words
A process according to any one of claims 1 or 2 in which the electric conductor is bare prior to the coating thereof with the polyethylene resin.
Claim 7
Dependent Claim
38 words
A process according to any one of claims 1 or 2 in which the electric conductor has been previously coated with at least one layer of a coating material prior to the coating thereof with the polyethylene resin.
Claim 8
Dependent Claim
23 words
A process according to claim 6 in which the previously-coated layer has been crosslinked prior to the fabricating thereof with the polyethylene resin.
Claim 9
Dependent Claim
23 words
A process according to claim 1 in which the copolymer is produced under a pressure of about 500 to 4000 kg/cm. 2 .
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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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |