CA2497032A1 - High-voltage direct current cable insulation and semiconductive shield - Google Patents
High-voltage direct current cable insulation and semiconductive shield Download PDFInfo
- Publication number
- CA2497032A1 CA2497032A1 CA002497032A CA2497032A CA2497032A1 CA 2497032 A1 CA2497032 A1 CA 2497032A1 CA 002497032 A CA002497032 A CA 002497032A CA 2497032 A CA2497032 A CA 2497032A CA 2497032 A1 CA2497032 A1 CA 2497032A1
- Authority
- CA
- Canada
- Prior art keywords
- less
- ethylene
- blend
- ion scavenger
- copolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
Abstract
A high-voltage direct current cable insulation is made from a blend which includes an ethylene copolymer, such as ethylene-alpha olefin copolymer, with low crystallinity to reduce physical space charge trapping sites, a polar polymer modifier in an effective amount to enhance local conductivity to leak space charge quickly when local stress is enhanced, and an ion scavenger to stabilize or neutralize the space charge to provide a composition which is an effective high-voltage DC cable insulation. A high-voltage direct current cable semiconductive shield is made from a blend that includes an ethylene copolymer, a carbon black having a low level of ionic species, a polar polymer modifier, and an ion scavenger.
Claims (10)
1. High-voltage direct current cable insulation comprising:
a blend of or which is made from a blend of (a) at least one ethylene copolymer, having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm, selected from the group consisting of (i) ethylene/alpha olefin copolymers and (ii) nonpolar, low crystalline ethylene copolymers selected from the group consisting of ethylene/propylene copolymer and ethylene/styrene copolymer and mixtures thereof;
(b) at least one polar polymer modifier in an amount effective to provide an insulation made with the blend with an enhanced field conductivity and enhanced space charge leakage at high fields relative to an insulation made with a blend which does not include a polar polymer modifier; and (c) at least one ion scavenger in an amount effective to reduce ionic mobility relative an insulation made with a blend which does not include an ion scavenger, wherein the ethylene copolymer, the polar polymer modifier, and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm.
a blend of or which is made from a blend of (a) at least one ethylene copolymer, having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm, selected from the group consisting of (i) ethylene/alpha olefin copolymers and (ii) nonpolar, low crystalline ethylene copolymers selected from the group consisting of ethylene/propylene copolymer and ethylene/styrene copolymer and mixtures thereof;
(b) at least one polar polymer modifier in an amount effective to provide an insulation made with the blend with an enhanced field conductivity and enhanced space charge leakage at high fields relative to an insulation made with a blend which does not include a polar polymer modifier; and (c) at least one ion scavenger in an amount effective to reduce ionic mobility relative an insulation made with a blend which does not include an ion scavenger, wherein the ethylene copolymer, the polar polymer modifier, and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm.
2. High-voltage direct current cable insulation comprising:
a blend of or which is made from a blend of (a) at least one ethylene/alpha olefin copolymer having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm;
(b) from about 0.1 to about 15 weight percent of at least one polar polymer modifier having at least one polar component; and (c) from about 0.05 to about 0.5 weight percent of at least one ion scavenger having at least one chelating component, wherein the ethylene/alpha olefin copolymer, the polar polymer modifier, and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm applied.
a blend of or which is made from a blend of (a) at least one ethylene/alpha olefin copolymer having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm;
(b) from about 0.1 to about 15 weight percent of at least one polar polymer modifier having at least one polar component; and (c) from about 0.05 to about 0.5 weight percent of at least one ion scavenger having at least one chelating component, wherein the ethylene/alpha olefin copolymer, the polar polymer modifier, and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm applied.
3. The high-voltage direct current insulation of claim 1 or 2, wherein (a) the polar polymer modifier is selected from the group consisting of (i) a polymer having a density of less than 0.900grams/cubic centimeter with at least one side group selected from the group consisting of hydroxyl, carboxyl, styrenic; (ii) a polymer having a density of less than 0.900grams/cubic centimeter and at least one side group which is a residue of maleic anhydride, vinyl acetate or vinyl acrylate; (iii) a polylactone resin and; (iv) mixtures thereof, and (b) the ion scavenger has at least one chelating group.
4. The high-voltage direct current insulation of any of claims 1 - 3, wherein the ethylene copolymer is crosslinked.
5. A high-voltage direct current cable comprising:
(a) an electrical conductor; and (b) cable insulation comprising a blend or which is made from a blend of (i) at least one nonpolar, low crystalline ethylene copolymer selected from the group consisting of ethylene/propylene copolymer and ethylene/styrene copolymer and mixtures thereof, the ethylene copolymer having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm;
(ii) at least one polar polymer modifier having at least one polar component in an amount effective to provide an insulation made with the blend with an enhanced field conductivity and enhanced space charge leakage at high fields relative to an insulation made with a blend which does not include a polar polymer modifier;
and (iii) at least one ion scavenger having at least one chelating component in an amount effective to reduce ion mobility relative to an insulation made with a blend which does not include an ion scavenger, wherein the ethylene copolymer, the polar polymer modifier, and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm applied.
(a) an electrical conductor; and (b) cable insulation comprising a blend or which is made from a blend of (i) at least one nonpolar, low crystalline ethylene copolymer selected from the group consisting of ethylene/propylene copolymer and ethylene/styrene copolymer and mixtures thereof, the ethylene copolymer having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm;
(ii) at least one polar polymer modifier having at least one polar component in an amount effective to provide an insulation made with the blend with an enhanced field conductivity and enhanced space charge leakage at high fields relative to an insulation made with a blend which does not include a polar polymer modifier;
and (iii) at least one ion scavenger having at least one chelating component in an amount effective to reduce ion mobility relative to an insulation made with a blend which does not include an ion scavenger, wherein the ethylene copolymer, the polar polymer modifier, and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm applied.
6. The high-voltage direct current cable as recited in claim 5 wherein the ethylene copolymer is crosslinked.
7. A method for providing a cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm applied, the method comprising:
(a) mixing (i) at least one ethylene/alpha olefin copolymer having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm.
(ii) from about 0.1 to about 15 weight percent of at least one polar polymer modifier having at least one polar component;
(iii) from about 0.05 to about 0.5 weight percent of at least one ion scavenger having at least one chelating component, wherein the ethylene/alpha olefin copolymer, the polar polymer modifier and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm applied.
(a) mixing (i) at least one ethylene/alpha olefin copolymer having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm.
(ii) from about 0.1 to about 15 weight percent of at least one polar polymer modifier having at least one polar component;
(iii) from about 0.05 to about 0.5 weight percent of at least one ion scavenger having at least one chelating component, wherein the ethylene/alpha olefin copolymer, the polar polymer modifier and the ion scavenger being in amounts to provide the cable insulation with a charge density of less than 2 Coulomb/mm3 measured by a pulsed electro acoustic method after 24 hours with either positive or negative 20 kV/mm applied.
8. High-voltage direct current cable semiconductive shield comprising:
a blend of or which is made from a blend of (a) at least one ethylene copolymer, having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm, selected from the group consisting of (i) ethylene/alpha olefin copolymers and (ii) nonpolar, low crystalline ethylene copolymers selected from the group consisting of ethylene/propylene copolymer and ethylene/styrene copolymer and mixtures thereof;
(b) a carbon black having a low level of ionic species;
(c) at least one polar polymer modifier in an amount effective to provide a semiconductive shield made with the blend with an enhanced field conductivity enhanced space charge leakage at high fields relative to a semiconductive shield made with a blend which does not include a polar polymer modifier; and (d) at least one ion scavenger in an amount effective to reduce ionic mobility relative to a semiconductive shield made with a blend, which does not include an ion scavenger.
a blend of or which is made from a blend of (a) at least one ethylene copolymer, having a density of less than about 0.900grams/cubic centimeter, a melt index of from about 0.5 to about 10grams/10 minutes, a crystallinity of less than about 10 percent and a catalyst residue of less than about 1000 ppm, selected from the group consisting of (i) ethylene/alpha olefin copolymers and (ii) nonpolar, low crystalline ethylene copolymers selected from the group consisting of ethylene/propylene copolymer and ethylene/styrene copolymer and mixtures thereof;
(b) a carbon black having a low level of ionic species;
(c) at least one polar polymer modifier in an amount effective to provide a semiconductive shield made with the blend with an enhanced field conductivity enhanced space charge leakage at high fields relative to a semiconductive shield made with a blend which does not include a polar polymer modifier; and (d) at least one ion scavenger in an amount effective to reduce ionic mobility relative to a semiconductive shield made with a blend, which does not include an ion scavenger.
9. The high-voltage direct current semiconductive shield of claim 8, wherein (a) the polar polymer modifier is selected from the group consisting of (i) a polymer having a density of less than 0.900grams/cubic centimeter with at least one side group selected from the group consisting of hydroxyl, carboxyl, styrenic; (ii) a polymer having a density of less than 0.900grams/cubic centimeter and at least one side group which is a residue of maleic anhydride, vinyl acetate or vinyl acrylate; (iii) a polylactone resin and; (iv) mixtures thereof, and (b) the ion scavenger has at least one chelating group.
10. The high-voltage direct current semiconductive shield of claim 8 or 9, wherein the ethylene copolymer is crosslinked.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/263,328 | 2002-10-07 | ||
| US10/263,328 US6670554B1 (en) | 2002-10-07 | 2002-10-07 | High-voltage direct current cable insulation |
| PCT/US2003/029070 WO2004034408A1 (en) | 2002-10-07 | 2003-09-16 | High-voltage direct current cable insulation and semiconductive shield |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2497032A1 true CA2497032A1 (en) | 2004-04-22 |
| CA2497032C CA2497032C (en) | 2012-12-04 |
Family
ID=29735651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2497032A Expired - Fee Related CA2497032C (en) | 2002-10-07 | 2003-09-16 | High-voltage direct current cable insulation and semiconductive shield |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US6670554B1 (en) |
| EP (1) | EP1552535B1 (en) |
| JP (2) | JP2006502552A (en) |
| AT (1) | ATE346362T1 (en) |
| AU (1) | AU2003270691A1 (en) |
| CA (1) | CA2497032C (en) |
| DE (1) | DE60309910T2 (en) |
| WO (1) | WO2004034408A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6670554B1 (en) * | 2002-10-07 | 2003-12-30 | Union Carbide Chemicals & Plastics Technology Corporation | High-voltage direct current cable insulation |
| US20060116456A1 (en) * | 2004-11-30 | 2006-06-01 | Lin Thomas S | Composition with enhanced heat resistance property |
| JP5437250B2 (en) * | 2007-09-25 | 2014-03-12 | ダウ グローバル テクノロジーズ エルエルシー | Styrenic polymer as a blending component to control adhesion between olefinic substrates |
| KR101355572B1 (en) | 2009-02-19 | 2014-01-24 | 엘에스전선 주식회사 | Extra high voltage cable |
| CN105207130B (en) | 2009-09-14 | 2018-11-23 | 阿雷沃国际公司 | underground modular high-voltage direct current electric power transmission system |
| JP5830848B2 (en) * | 2010-10-29 | 2015-12-09 | ダイキン工業株式会社 | Surface treatment agent and composition, processed product |
| RU2500047C1 (en) * | 2012-05-03 | 2013-11-27 | ЗАО "Лидер-Компаунд" | Electroconductive peroxide cross-linkable composition |
| EP3643741B1 (en) | 2013-04-18 | 2023-07-05 | Dow Global Technologies LLC | Coated conductor with voltage-stabilized inner layer |
| CN103613828B (en) * | 2013-11-26 | 2015-12-30 | 无锡市明珠电缆有限公司 | A kind of high voltage direct current cable material and its preparation method and application |
| EP3234954A1 (en) * | 2014-12-19 | 2017-10-25 | Borealis AG | Polymer composition for w&c application with advantageous electrical properties |
| WO2016097254A1 (en) * | 2014-12-19 | 2016-06-23 | Borealis Ag | Power cable polymer composition, power cable and uses with advantageous properties |
| MX2019005665A (en) * | 2016-12-01 | 2019-08-12 | Dow Global Technologies Llc | Peroxide-curable polyolefin composition. |
| FR3079067B1 (en) * | 2018-03-19 | 2020-03-20 | Nexans | ELECTRIC CABLE COMPRISING AN EASILY PEELABLE POLYMERIC LAYER |
| US20210079195A1 (en) | 2018-04-26 | 2021-03-18 | Dow Global Technologies Llc | Polyolefin additive formulations |
| CN109438807B (en) * | 2018-10-29 | 2020-12-01 | 北京科技大学 | Insulating material and preparation method and application thereof |
| CN112858801A (en) * | 2021-01-08 | 2021-05-28 | 青岛科技大学 | Method and system for reducing space charge injection under direct-current high electric field |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59152937A (en) * | 1983-02-18 | 1984-08-31 | Mitsui Petrochem Ind Ltd | Ethylene-alpha-olefin copolymer composition |
| US5237014A (en) * | 1989-05-08 | 1993-08-17 | Union Carbide Chemicals & Plastics Technology Corporation | Tree resistant compositions |
| JPH0765633A (en) | 1993-08-20 | 1995-03-10 | Fujikura Ltd | Dc cable |
| JPH09231839A (en) | 1996-02-20 | 1997-09-05 | Showa Electric Wire & Cable Co Ltd | Direct current cable |
| AU1085999A (en) | 1997-10-17 | 1999-05-10 | Dow Chemical Company, The | Compositions of interpolymers of alpha-olefin monomers with one or more vinyl orvinylidene aromatic monomers |
| SE512580C2 (en) | 1997-11-03 | 2000-04-03 | Abb Ab | Process for preparing a material, composition and use of the composition |
| SE511215C2 (en) | 1997-12-22 | 1999-08-23 | Asea Brown Boveri | Dielectric gelling composition, use thereof, insulated electric DC cable comprising such composition and process for making it |
| SE514062C2 (en) | 1997-12-22 | 2000-12-18 | Abb Ab | Isolated electric DC cable |
| SE514263C2 (en) | 1997-12-22 | 2001-01-29 | Abb Ab | An electric DC cable with an insulation system comprising an extruded polyethylene composition and a method for manufacturing such a cable |
| SE511214C2 (en) | 1997-12-22 | 1999-08-23 | Asea Brown Boveri | Dielectric gelling composition, method of manufacture thereof and an electric DC cable comprising an insulation system impregnated with such composition |
| SE511942C2 (en) | 1998-02-06 | 1999-12-20 | Abb Ab | A method of manufacturing a cable with an insulation system comprising an extruded, cross-linked conductive polyethylene composition |
| SE9800567L (en) | 1998-02-25 | 1999-08-26 | Abb Ab | An electric DC cable with an insulation system comprising a composition based on extruded, cross-linked polyethylene and a method for making such a cable |
| KR20010043481A (en) * | 1998-05-11 | 2001-05-25 | 조셉 에스. 바이크 | High Solids Conductive Coatings Compositions Suitable for Electrostatic Atomization Application Methods |
| DK1283527T3 (en) * | 2000-03-31 | 2006-07-03 | Sumitomo Electric Industries | Electrical insulating resin composition and electrical wire or cable, both coated therewith |
| JP2001312922A (en) * | 2000-04-28 | 2001-11-09 | Sumitomo Electric Ind Ltd | Plastic insulating composition and electrical wire, cable, cable connecting part using the same |
| US6670554B1 (en) * | 2002-10-07 | 2003-12-30 | Union Carbide Chemicals & Plastics Technology Corporation | High-voltage direct current cable insulation |
-
2002
- 2002-10-07 US US10/263,328 patent/US6670554B1/en not_active Expired - Lifetime
-
2003
- 2003-09-16 US US10/663,525 patent/US6924435B2/en not_active Expired - Lifetime
- 2003-09-16 JP JP2004543302A patent/JP2006502552A/en active Pending
- 2003-09-16 WO PCT/US2003/029070 patent/WO2004034408A1/en active IP Right Grant
- 2003-09-16 AU AU2003270691A patent/AU2003270691A1/en not_active Abandoned
- 2003-09-16 CA CA2497032A patent/CA2497032C/en not_active Expired - Fee Related
- 2003-09-16 EP EP03752399A patent/EP1552535B1/en not_active Expired - Lifetime
- 2003-09-16 DE DE60309910T patent/DE60309910T2/en not_active Expired - Lifetime
- 2003-09-16 AT AT03752399T patent/ATE346362T1/en not_active IP Right Cessation
-
2011
- 2011-06-21 JP JP2011137162A patent/JP5431419B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003270691A1 (en) | 2004-05-04 |
| DE60309910D1 (en) | 2007-01-04 |
| ATE346362T1 (en) | 2006-12-15 |
| JP5431419B2 (en) | 2014-03-05 |
| CA2497032C (en) | 2012-12-04 |
| US6924435B2 (en) | 2005-08-02 |
| US20040112618A1 (en) | 2004-06-17 |
| EP1552535A1 (en) | 2005-07-13 |
| JP2006502552A (en) | 2006-01-19 |
| EP1552535B1 (en) | 2006-11-22 |
| JP2012009436A (en) | 2012-01-12 |
| US6670554B1 (en) | 2003-12-30 |
| DE60309910T2 (en) | 2007-04-12 |
| WO2004034408A1 (en) | 2004-04-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20200916 |