DE2737430C2 - Polyolefin insulation with a voltage stabilizer - Google Patents
Polyolefin insulation with a voltage stabilizerInfo
- Publication number
- DE2737430C2 DE2737430C2 DE2737430A DE2737430A DE2737430C2 DE 2737430 C2 DE2737430 C2 DE 2737430C2 DE 2737430 A DE2737430 A DE 2737430A DE 2737430 A DE2737430 A DE 2737430A DE 2737430 C2 DE2737430 C2 DE 2737430C2
- Authority
- DE
- Germany
- Prior art keywords
- insulation
- voltage stabilizer
- polyolefin insulation
- polyolefin
- water
- 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.)
- Expired
Links
- 238000009413 insulation Methods 0.000 title claims description 18
- 229920000098 polyolefin Polymers 0.000 title claims description 13
- 239000003381 stabilizer Substances 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 235000006650 Syzygium cordatum Nutrition 0.000 description 5
- 240000005572 Syzygium cordatum Species 0.000 description 5
- -1 Polyethylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
-
- 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
- H01B3/002—Inhomogeneous material in general
- H01B3/004—Inhomogeneous material in general with conductive additives or conductive layers
-
- 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
-
- 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
- H01B3/46—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 silicones
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Conductive Materials (AREA)
Description
χ =0 bis 4 ist, χ = 0 to 4,
R einen gesättigten aliphatischen, aromatischen oder cycloaliphatischen Kohlenwasserstoffrest darstellt, der gegebenenfalls noch durch Amino-, Epoxigruppen oder andere substituiert sein kann, undR is a saturated aliphatic, aromatic or cycloaliphatic hydrocarbon radical represents, which may optionally be substituted by amino, epoxy groups or others can, and
Ri aus Alkpxigruppen, vorzugsweise Methoxigruppen, bestehen kann.Ri can consist of alkoxy groups, preferably methoxy groups.
2. Polyolefinisolierung nach Anspruch 1, gekennzeichnet durch die Verwendung von vernetzten Polyolefinen, insbesondere vernetzten! Polyäthylen.2. polyolefin insulation according to claim 1, characterized through the use of crosslinked polyolefins, especially crosslinked! Polyethylene.
3. Polyolefinisolierung nach Anspruch 2, dadurch gekennzeichnet, daß die Polyolefine in heißem Wasserdampf vernetzt worden sind.3. polyolefin insulation according to claim 2, characterized in that the polyolefins in hot Water vapor have been crosslinked.
4. Polyolefinisolierung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie als rußenthaltende, leitfähige Schicht ausgebildet ist und die Grenzschicht einer Kabelisolierung bildet.4. Polyolefin insulation according to one of claims 1 to 3, characterized in that it is used as soot-containing, conductive layer is formed and forms the boundary layer of a cable insulation.
Polyolefinisolierungen unterliegen der Gefahr der Ausbildung sogenannter Treeing-Phänomene, d. h. bei Spannungsbeanspruchung zeigen sie mikroskopisch sichtbare, bäumchenartige bzw. büschelartige Zersetzungserscheinungen in der Isolierung. Neben den Bäumchen, in denen elektrische Entladungen stattfinden (electrical treeing), sind auch sogenannte »water trees« beobachtet worden. Sie entstehen vermutlich, wenn an irgendwelchen Fehlstellen höhere Feldstärken auftreten und dort Wasser konzentriert wird.Polyolefin insulation is subject to the risk of Formation of so-called treeing phenomena, d. H. when stressed, they show microscopically visible, tree-like or tuft-like decomposition phenomena in isolation. Next to the little trees in which electrical discharges take place (electrical treeing), so-called »water trees« have also been observed. They probably arise when on any imperfections, higher field strengths occur and water is concentrated there.
Aus der US-PS 39 36 572 ist es bekannt. Polysiloxane als Spannungsstabilisatoren in Polyolefinisolierungen zu verwenden, um die Widerstandsfähigkeit gegen Ionisierung zu verbessern.From US-PS 39 36 572 it is known. Polysiloxanes To be used as voltage stabilizers in polyolefin insulation to increase the resistance to ionization to improve.
Der Erfindung liegt die Aufgabe zugrunde, in einer Polyolefinisolierung, die unter Hochspannungseinwirkung steht, die sogenannten Water-Trees zu verhindern.The invention is based on the object in a polyolefin insulation that is exposed to high voltage stands to prevent the so-called water trees.
Diese Aufgabe wird erfindungsgemäß durch die in Patentanspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.According to the invention, this object is achieved by the features specified in claim 1. Advantageous further developments can be found in the subclaims.
s Die erfindungsgemäßen Stabilisatorzusätze vermögen mit Wasser zu reagieren und das Auftreten der sogenannten Water-Trees offenbar zu verhindern.s The stabilizer additives according to the invention are able to react with water and the occurrence of the apparently to prevent so-called water trees.
Als Stabilisatorzusätze können z.B. Alkoxysilane Anwendung finden, wie Tetramethoxisilan, Äthyltrimethoxisilan, Phenyltrimethoxisilan, /}-{3,4-Epoxi-cyclohexyl)-äthyltrimethoxisilan oder y-Aminopropyl-triäthoxisilan. Als Stabilisatorzusätze haben sich Mengen von 0,1 bis 3%, vorzugsweise von 0,5 bis 2%, als geeignet erwiesen.Alkoxysilanes, for example, can be used as stabilizer additives Find application, such as tetramethoxisilane, ethyltrimethoxisilane, Phenyltrimethoxysilane, /} - {3,4-Epoxi-cyclohexyl) -äthyltrimethoxisilan or γ-aminopropyl-triethoxysilane. As stabilizer additives, amounts of 0.1 to 3%, preferably from 0.5 to 2%, have been found to be suitable.
is Es ist bereits bekannt, als Stabilisatorzusätze anorganische Salze, wie z. B. NaCl oder NaiSO«, zu verwenden (DE-OS 25 37 283). Diese haben jedoch den Nachteil, nur schwierig in dem Dielektrikum homogin verteilt werden zu können und eine geringe Verträglichkeit mit dem Dielektrikum aufzuweisen. Die erfindungsgemäßen Zusätze sind dagegen in Polyolefinisoliermassen leicht einzumischen und zeigen eine gute Verträglichkeit in der Isolierung, zumal sie meistens als Flüssigkeiten vorliegen. Im Falle des Einsatzes in einer Isolierung aus VPE sind sie darüber hinaus mit den in diesen Isolierungen anwesenden Vernetzerspaltprodukten mischbar, womit die Verteilung von Stabilisatoranteilen in der Isolierung noch verbessert werden kann. Außerdem wird bei VPE die chemische Vernetzung durch den Stabilisatorzusatz nicht beeinträchtigtIt is already known that inorganic stabilizers are used Salts such as B. NaCl or NaiSO «to use (DE-OS 25 37 283). However, these have the disadvantage that they are difficult to distribute homogeneously in the dielectric to be able to and have a low compatibility with the dielectric. The invention Additives, on the other hand, are easy to mix into polyolefin insulating compounds and are well tolerated by the insulation, especially since they are mostly in the form of liquids. In the case of use in insulation They are also VPE with the crosslinking cleavage products present in these insulations miscible, which means that the distribution of stabilizer components in the insulation can be improved even further. In addition, the chemical crosslinking of VPE is not impaired by the addition of stabilizers
Wenn die Vernetzung des Polyäthylens unter der Einwirkung von heißem Wasserdampf erfolgt, gelangt ein geringer Anteil des Wasserdampfs in die Isolierung. Davon ausgehend können bei späterer Spannungsbeanspruchung Water-Trees in der Mitte der Isolierung entstehen. Durch die Reaktion des erfindungsgemäßen Zusatzes mit dem Wasser kann die Entstehung von Water-Trees weitgehend eliminiert werden.If the polyethylene is crosslinked under the action of hot water vapor, it gets a small proportion of the water vapor in the insulation. Based on this, later stress loads Water trees emerge in the middle of the insulation. By the reaction of the invention In addition to the water, the formation of water trees can be largely eliminated.
schung als auch den angrenzenden leitfähigen Schichten zugesetzt werden. Im letzten Fall kann so das
Eindiffundieren von Wasser in die Isolierung weitgehend verhindert werden.
Neben Isolierungen aus vernetzten Polyolefinen, insbesondere vernetztem Polyäthylen, können die
Stabilisatorzusätze auch in Isolierungen aus nicht vernetzten Polyolefinen Anwendung finden. Die Reaktivität
der Stabilisatorzusätze kann durch Mitverwendung von Katalysatoren gesteigert werden. Dafür kannSchung as well as the adjacent conductive layers can be added. In the latter case, water can largely be prevented from diffusing into the insulation.
In addition to insulation made from crosslinked polyolefins, in particular crosslinked polyethylene, the stabilizer additives can also be used in insulation made from non-crosslinked polyolefins. The reactivity of the stabilizer additives can be increased by using catalysts. For that can
so z. B. Dibutylzinndilaurat in Frage kommen.so z. B. dibutyltin dilaurate come into question.
Claims (1)
wobeiR x -Si (OR,) * - ,,
whereby
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2737430A DE2737430C2 (en) | 1977-08-19 | 1977-08-19 | Polyolefin insulation with a voltage stabilizer |
| DE2805875A DE2805875C2 (en) | 1977-08-19 | 1978-02-11 | Polyolefin insulation with a voltage stabilizer as the boundary layer of cable insulation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2737430A DE2737430C2 (en) | 1977-08-19 | 1977-08-19 | Polyolefin insulation with a voltage stabilizer |
| DE2805875A DE2805875C2 (en) | 1977-08-19 | 1978-02-11 | Polyolefin insulation with a voltage stabilizer as the boundary layer of cable insulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2737430A1 DE2737430A1 (en) | 1979-02-22 |
| DE2737430C2 true DE2737430C2 (en) | 1983-03-17 |
Family
ID=32714418
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2737430A Expired DE2737430C2 (en) | 1977-08-19 | 1977-08-19 | Polyolefin insulation with a voltage stabilizer |
| DE2805875A Expired DE2805875C2 (en) | 1977-08-19 | 1978-02-11 | Polyolefin insulation with a voltage stabilizer as the boundary layer of cable insulation |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2805875A Expired DE2805875C2 (en) | 1977-08-19 | 1978-02-11 | Polyolefin insulation with a voltage stabilizer as the boundary layer of cable insulation |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE2737430C2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400429A (en) | 1980-12-22 | 1983-08-23 | National Distillers And Chemical Corporation | Tree retardant additive composition for polymeric insulation |
| DE3344759A1 (en) * | 1983-12-10 | 1985-06-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Stabilised polyolefin-based insulation material |
| DE3418792A1 (en) * | 1984-05-19 | 1985-11-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Polyolefin insulation resistant to treeing |
| EP2107951A4 (en) * | 2007-01-12 | 2011-06-08 | Utilx Corp | Composition and method for restoring an electrical cable and inhibiting corrosion in the aluminum conductor core |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4299713A (en) * | 1979-07-19 | 1981-11-10 | National Distillers And Chemical Corp. | Electrical tree and water tree resistant polymer compositions |
| CA1161589A (en) * | 1979-07-19 | 1984-01-31 | Melvin F. Maringer | Electrical tree and water tree resistant polymer compositions |
| AT374298B (en) * | 1979-07-26 | 1984-04-10 | Union Carbide Corp | INSULATION MIXTURE, ESPECIALLY AS ISOLATION OF ELECTRIC WIRE OR CABLE |
| US4263158A (en) * | 1979-07-26 | 1981-04-21 | Union Carbide Corporation | Dielectric compositions stabilized against water treeing with organo silane compounds containing the azomethine group and partial condensation products |
| DE2935224A1 (en) * | 1979-08-31 | 1981-03-19 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | WATERPROOF HIGH VOLTAGE INSULATION FOR ELECTRIC CABLES |
| GB2074170B (en) * | 1980-04-21 | 1984-03-14 | Raychem Corp | Electrically conductive polymer compositions |
| IT1154815B (en) * | 1980-06-30 | 1987-01-21 | Pirelli | PERFECTED AERIAL LINE CONDUCTOR |
| US4376180A (en) | 1981-09-30 | 1983-03-08 | Union Carbide Corporation | Ethylene polymers stabilized against water-treeing by N-phenyl substituted amino silanes; and the use of these compositions as insulation about electrical conductors |
| DE3233324A1 (en) * | 1982-09-08 | 1984-03-08 | kabelmetal electro GmbH, 3000 Hannover | Plastic-insulated electrical medium- or high-voltage cable |
| EP0114495A3 (en) * | 1982-12-27 | 1984-10-17 | Dow Corning Corporation | Anti-treeing additives |
| DE3318988A1 (en) * | 1983-05-25 | 1984-11-29 | Siemens AG, 1000 Berlin und 8000 München | ELECTRICAL INSULATION |
| DE3321268A1 (en) * | 1983-06-13 | 1984-12-13 | Siemens AG, 1000 Berlin und 8000 München | ELECTRICAL INSULATION |
| US4499013A (en) * | 1983-08-17 | 1985-02-12 | National Distillers And Chemical Corporation | Electrical tree and water tree resistant compounds and polymer compositions containing the same |
| US4514536A (en) * | 1984-02-01 | 1985-04-30 | National Distillers And Chemical Corporation | Silanes useful as anti-treeing additives |
| US4548865A (en) * | 1984-02-01 | 1985-10-22 | National Distillers And Chemical Corpooration | Silanes useful as anti-treeing additives |
| IT1186155B (en) * | 1985-12-20 | 1987-11-18 | Pirelli Cavi Spa | ELECTRIC CABLES AND MATERIAL FOR FORMING COATINGS OF ELECTRIC CABLE CONDUCTORS |
| US4840983A (en) * | 1986-05-23 | 1989-06-20 | Dow Corning Corporation | Anti-treeing additives |
| EP0256340B1 (en) * | 1986-08-04 | 1990-06-13 | Siemens Aktiengesellschaft | Electrical insulation |
| DE3628554A1 (en) * | 1986-08-22 | 1988-03-03 | Licentia Gmbh | PLASTIC INSULATION |
| US4766011A (en) * | 1986-12-29 | 1988-08-23 | Dow Corning Corporation | Restoring stranded conductor electrical distribution cable |
| DE3702209A1 (en) * | 1987-01-26 | 1988-08-04 | Licentia Gmbh | PLASTIC INSULATION AND METHOD FOR THEIR PRODUCTION |
| GB9113584D0 (en) * | 1991-06-24 | 1991-08-14 | Bp Chem Int Ltd | Stabilised polymer composition and use |
| EP2183316B1 (en) | 2007-08-06 | 2013-01-09 | General Cable Technologies Corporation | Tree resistant insulation compositions |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1294986A (en) * | 1970-01-05 | 1972-11-01 | ||
| GB1477764A (en) * | 1975-08-20 | 1977-06-29 | Furukawa Electric Co Ltd | Power cable |
-
1977
- 1977-08-19 DE DE2737430A patent/DE2737430C2/en not_active Expired
-
1978
- 1978-02-11 DE DE2805875A patent/DE2805875C2/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400429A (en) | 1980-12-22 | 1983-08-23 | National Distillers And Chemical Corporation | Tree retardant additive composition for polymeric insulation |
| DE3344759A1 (en) * | 1983-12-10 | 1985-06-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Stabilised polyolefin-based insulation material |
| DE3418792A1 (en) * | 1984-05-19 | 1985-11-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Polyolefin insulation resistant to treeing |
| EP2107951A4 (en) * | 2007-01-12 | 2011-06-08 | Utilx Corp | Composition and method for restoring an electrical cable and inhibiting corrosion in the aluminum conductor core |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2805875A1 (en) | 1979-08-16 |
| DE2737430A1 (en) | 1979-02-22 |
| DE2805875C2 (en) | 1983-05-26 |
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Owner name: KABEL RHEYDT AG, 4050 MOENCHENGLADBACH, DE |
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| 8339 | Ceased/non-payment of the annual fee |