Patent US5492760A successfully refreshed from Google Patents.
US5492760A
Expired / Lapsed
US
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Water tree resistant, moisture curable insulation composition for power cables
Assignee: Montreal Trust Company of Canada
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Filing: 1994-12-05
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Granted: 1996-02-20
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Expires: 2014-12-05
Abstract
Abstract A cross-linkable polymer composition containing a cross-linkable polymer having at least one hydrolysable silane group, a silanol condensation catalyst and a polybutadiene. The composition provides a cross-linked polymer having good water tree resistance properties, for use as insulation in electrical cables.
Inventors
- 👤 Haridoss Sarma
- 👤 Alexander Shaikevitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:21
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08L; C08L43/00; C08L43/04; H01B3/28; C08L9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2962; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
32 words
An improved cross-linkable polymer composition containing a cross-linkable polymer having at least one hydrolysable silane group and at least one silanol condensation catalyst characterized in that said composition further comprises a polybutadiene.
Claim 2
Dependent Claim
32 words
An improved cross-linkable polymer composition containing a cross-linkable polymer having at least one hydrolysable silane group and at least one silanol condensation catalyst characterized in that said composition further comprises a polybutadiene.
Claim 3
Dependent Claim
27 words
A composition as defined in claim 1 wherein said crosslinkable polymer is a silane grafted homopolymer or copolymer, or a copolymer of an olefin and a silane.
Claim 4
Dependent Claim
68 words
A composition as defined in claim 2 wherein said composition comprises a copolymer prepared by radically polymerizing a polymerizable monomeric mixture consisting essentially of ethylene and at least one ethylenically unsaturated silane compound selected from the group consisting of vinyltrimethoxysilane, vinyltriethoxysilane and methacryloxypropyltrimethoxysilane under a pressure ranging from 1000 to 4000 kg/cm 2 , and containing said silane compound in an amount of from 0.5 to 2% w/w.
Claim 5
Dependent Claim
15 words
A composition as defined in claim 3 wherein said ethylenically unsaturated silane compound is vinyltrimethoxysilane.
Claim 6
Dependent Claim
39 words
A composition as defined in claim 1 wherein said crosslinkable polymer is an ethylene vinyl silane copolymer in an amount selected from 85-99% w/w, said polybutadiene is from 1-15% w/w and said silanol condensation catalyst is from 0.001-10% w/w.
Claim 7
Dependent Claim
28 words
A composition as defined of claim 1 wherein said polybutadiene is a low molecular weight, low crystalline syndiotactic 1,2-polybutadiene or a hydroxyl terminated low molecular weight viscous polybutadiene.
Claim 8
Dependent Claim
42 words
A process for producing a cross-linked polymer comprising the steps of: treating a composition comprising a cross-linkable polymer having at least one hydrolyzable silane group, at least one silanol condensation catalyst and a polybutadiene, under cross-linking conditions to produce said cross-linked polymer.
Claim 9
Dependent Claim
42 words
A process for producing a cross-linked polymer comprising the steps of: treating a composition comprising a cross-linkable polymer having at least one hydrolyzable silane group, at least one silanol condensation catalyst and a polybutadiene, under cross-linking conditions to produce said cross-linked polymer.
Claim 10
Dependent Claim
27 words
A process as defined in claim 7 wherein said cross-linking conditions comprise subjecting said composition to an effective amount of heat and/or moisture to effect said cross-linking.
Claim 11
Dependent Claim
24 words
A process as defined in claim 7, further comprising the step of rotomolding, injection molding or extruding the composition prior to said cross-linking step.
Claim 12
Dependent Claim
11 words
A cross-linked polymer as made by a process of claim 7.
Claim 13
Dependent Claim
16 words
A coated substrate comprising a substrate coated with a cross-linked polymer as defined in claim 10.
Claim 14
Dependent Claim
19 words
A coated substrate as defined in claim 11 wherein said substrate is an electrical conducting metal wire or cable.
Claim 15
Dependent Claim
18 words
A coated substrate as defined in claim 11 wherein said substrate is the surface of a metal vessel.
Claim 16
Dependent Claim
17 words
An electrical conductor coated with, or having extruded thereon, a cross-linked polymer as defined in claim 10.
Claim 17
Dependent Claim
24 words
A cable or wire comprising a metal core and at least one layer surrounding the core comprising a composition as defined in claim 10.
Claim 18
Dependent Claim
39 words
A coated substrate having enhanced resistance to water tree formation comprising a substrate which is coated with a composition comprising a cross-linkable polymer having at least one hydrolyzable silane group, at least one silanol condensation catalyst, and a polybutadiene.
Claim 19
Dependent Claim
39 words
A coated substrate having enhanced resistance to water tree formation comprising a substrate which is coated with a composition comprising a cross-linkable polymer having at least one hydrolyzable silane group, at least one silanol condensation catalyst, and a polybutadiene.
Claim 20
Dependent Claim
26 words
The coated substrate according to claim 16, wherein said substrate is an electrical conducting metal wire or cable and said coating has been cured using moisture.
Claim 21
Dependent Claim
22 words
The coated substrate according to claim 16, wherein said substrate is a metal vessel and said coating has been cured using moisture.
Claim 22
Dependent Claim
27 words
The coated substrate according to claim 16, wherein said cross-linkable polymer is a silane grafted homopolymer or copolymer, or a copolymer of an olefin and a silane.
Claim 23
Dependent Claim
28 words
The coated substrate according to claim 16, wherein said polybutadiene is a low molecular weight, low crystalline syndiotactic 1,2-polybutadiene or a hydroxyl terminated low molecular weight viscous polybutadiene.
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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) | 1999-02-19 | 1999-08-21 | 2000-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-19 | 2003-08-21 | 2004-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-19 | 2007-08-21 | 2008-02-20 | $7700.00 | Window Closed / Lapsed |