DE2737430A1 - STABILIZATION AGAINST ELECTRICAL TENSION IN POLYOLEFIN INSULATIONS - Google Patents

STABILIZATION AGAINST ELECTRICAL TENSION IN POLYOLEFIN INSULATIONS

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Publication number
DE2737430A1
DE2737430A1 DE19772737430 DE2737430A DE2737430A1 DE 2737430 A1 DE2737430 A1 DE 2737430A1 DE 19772737430 DE19772737430 DE 19772737430 DE 2737430 A DE2737430 A DE 2737430A DE 2737430 A1 DE2737430 A1 DE 2737430A1
Authority
DE
Germany
Prior art keywords
additives
insulation
additives according
consist
contained
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.)
Granted
Application number
DE19772737430
Other languages
German (de)
Other versions
DE2737430C2 (en
Inventor
Manfred Dr Phil Saure
Johann Dipl Chem Wartusch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kabel Rheydt AG
Original Assignee
Licentia Patent Verwaltungs GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE2737430A priority Critical patent/DE2737430C2/en
Priority to DE2805875A priority patent/DE2805875C2/en
Publication of DE2737430A1 publication Critical patent/DE2737430A1/en
Application granted granted Critical
Publication of DE2737430C2 publication Critical patent/DE2737430C2/en
Expired legal-status Critical Current

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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

Licentla Patent-Verwaltungs-GmbH. 6000 Frankfurt/M., Theodor-Stern-Kai 1Licentla Patent-Verwaltungs-GmbH. 6000 Frankfurt / M., Theodor-Stern-Kai 1

Ka/schz KS 77/214Ka / schz KS 77/214

17.8.1977August 17, 1977

Stabilisierung gegen elektrische Spannungsbeanspruchung in Polyolefin-Isolierungen Stabilization against electrical voltage stress in polyolefin insulation

Die Erfindung bezieht sich auf Stabilisator-Zusätze in Polyolefin-Isolierungen, die einer Hochspannungseinwirkung ausgesetzt sind. Diese Isolierungen unterliegen der Gefahr der Ausbildung sogenannter treeing-Phänomene, d.h., bei Spannungsbeanspruchung zeigen sie mikroskopisch sichtbare, bäumchenartige bzw. büschelartige Zersetzungserscheinungen in der Isolierung.The invention relates to stabilizer additives in Polyolefin insulation that is exposed to high voltage are exposed. These isolations are subject to the risk of so-called treeing phenomena, i.e. at When exposed to tension, they show microscopically visible, tree-like or tuft-like decomposition phenomena in the Insulation.

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.In addition to the little trees in which electrical discharges take place (electrical treeing), so-called "water trees" have also been observed been. They presumably arise when higher field strengths occur at some flaws and water is concentrated there will.

Der Erfindung liegt die Aufgabe zugrunde, in einer Polyolefinisolierung, die unter Hochspannungseinwirkung steht, die Bildung von sogenannten water trees zu verhindern.The invention is based on the object in a polyolefin insulation, which is under the influence of high voltage to prevent the formation of so-called water trees.

Gelöst wird die Aufgabe dadurch, daß die Polyolefin-Isolierung mit Zusätzen von Alkoxisilanen der allgemeinen Formel versehen werden:The object is achieved in that the polyolefin insulation is provided with additions of alkoxysilanes of the general formula will:

909808/0560909808/0560

- 3 - KS 77/214 - 3 - KS 77/214

Rx-Si CO-V4^ wobel R x -Si CO-V 4 ^ wobel

x»O bis 4 ist undx »is 0 to 4 and

R einen gesättigten aliphatischen, aromatischen oder cyclo-R is a saturated aliphatic, aromatic or cyclo-

aliphatischen Kohlenwasserstoffrest darstellt, der ggfs.represents aliphatic hydrocarbon radical, which may be.

noch durch Amino-, Epoxigruppen oder andere substituiert sein kann. R. kann aus Alkoxigruppen, vorzugsweise Methoxigruppen bestehen.nor substituted by amino, epoxy groups or others can be. R. can be composed of alkoxy groups, preferably methoxy groups exist.

Derartige Stabilisatorzusätze vermögen mit Wasser zu reagieren, und das Auftreten der sogenannten water-trees offenbar zu verhindern. Such stabilizer additives are able to react with water, and apparently to prevent the occurrence of so-called water trees.

Als Stabilisatorzuaätze können z.B. Alkoxisilane Anwendung finden, wie Tetramethoxisilan, Äthyltrimethoxisilan, Phenyltrimethoxisi lan, ß-(3«4 Epoxi-cyclohexyl-)üthyl-trimethoxisilan oder V -Aminopropyl-triätihoxisilan. Alkoxisilanes, for example, can be used as stabilizer additives, such as tetramethoxisilane, ethyltrimethoxisilane, phenyltrimethoxisilane, β- (3-4 epoxy-cyclohexyl-) ethyl-trimethoxisilane or V- aminopropyl-trietihoxisilane.

Als Stabilisatorzusätze haben sich Mengen von 0,1 bis 2 %, vorzugsweise von 0,5 bis 2 % als geeignet erwiesen.Amounts of 0.1 to 2 %, preferably 0.5 to 2 %, have proven to be suitable as stabilizer additives.

Es ist bereits bekannt, als Stabilisatorzusätze anorganische Salze, wie z.B. NaCl oder Na2SO^ zu verwenden (OS 25 37 283). Diese haben jedoch den Nachteil, nur schwierig in dem Dielektrikum homogen verteilt werden zu können und eine geringe Verträglichkeit mit dem Dielektrikum aufzuweisen.It is already known to use inorganic salts such as NaCl or Na 2 SO ^ as stabilizer additives (OS 25 37 283). However, these have the disadvantage that they can only be distributed homogeneously in the dielectric with difficulty and that they are poorly compatible with the dielectric.

Die erfindungsgemäßen Zusätze sind dagegen in Polyolefin!eoliermassen 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 darüberhinaus mit den in diesen Isolierungen anwesenden Vernetzerspaltprodukten mischbar, womit die Verteilung von Stabil!-· satoranteilen in der Isolierung noch verbessert werden kann. Außerdem wird bei VPE die chemische Vernetzung durch den Stab!» lisatorzusatz nicht beeinträchtigt.The additives according to the invention, on the other hand, are in polyolefinic insulating compounds easy to mix in and show good compatibility in the insulation, especially since they are mostly in the form of liquids. In the case of use in an insulation made of XLPE, they are also with the crosslinker cleavage products present in this insulation miscible, which means that the distribution of stabilizer components in the insulation can be further improved. In addition, chemical cross-linking is ensured by the rod with VPE! " additive not impaired.

Wenn die Vernetzung des Polyäthylene unter der Einwirkung von heißem Wasserdampf erfolgt, gelangt ein geringer Anteil des Wasserdampfes in die Isolierung»If the polyethylene is crosslinked under the action of hot steam, a small proportion of the Water vapor in the insulation »

909808/0560 - k -909808/0560 - k -

- 4 - KS 77/21*t - 4 - KS 77/21 * t

2737A302737A30

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 Entsteheng von water trees weitgehend eliminiert werden.Based on this, water trees can arise in the middle of the insulation in the event of later stress. By the reaction of the additive according to the invention with the water can largely eliminate the formation of water trees will.

Die Stabilisatoren können sowohl der Isoliermischung als auch den angrenzenden leitfähigen Schichten zugesetzt werden. Im letzten Fall kann so das Eindiffundieren von Wasser in die Isolierung weitgehend verhindert werden.The stabilizers can be added both to the insulating mixture and to the adjacent conductive layers. in the In the latter case, water can diffuse into the Isolation can be largely prevented.

Neben Isolierungen aus vernetzten Polyolefinen, insbesondere vernetzten 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 kann z.B. Dibutylzinndilaurat in Frage kommen.In addition to insulation made from crosslinked polyolefins, in particular crosslinked polyethylene, the stabilizer additives can also be used in Insulations made of non-crosslinked polyolefins are used. The reactivity of the stabilizer additives can be increased by using them can be increased by catalysts. Dibutyltin dilaurate, for example, can be used for this come into question.

§0380§/0iiO§0380§ / 0iiO

Claims (3)

Licentia Patent-Verwaltungs-GabH. 6000 Frankfurt/M., Theodor-Stern-Kai 1 Ka/schz KS 77/214 17.8.1977 PatentansprücheLicentia Patent-Verwaltungs-GabH. 6000 Frankfurt / M., Theodor-Stern-Kai 1 Ka / schz KS 77/214 August 17, 1977 claims 1) Istabilisator-Zusätze in Polyolefinisolierungen, die einer ^*SHochspannungseinwirkung ausgesetzt sind, dadurch gekennzeichnet, daß sie aus Zusätzen von Alkoxysilanen der allgemeinen Formel bestehen:1) Istabilisator additives in Polyolefinisolierungen which are exposed to high voltage exposure to a ^ * S, characterized in that they consist of additions of alkoxysilanes of the general formula: Rx-Si(0-V4-x, wobei
x»O bis k ist
und R x- Si (0 -V4-x, where
x »O to k
and R einen gesättigten aliphatischen, aromatischen oder cycloaliphatischen Kohlenwasserstoffrest darstellt, der ggfs. noch durch Amino-, Epoxigruppen oder andere substituiert sein kann. R kann aus Alkoxigruppen, vorzugsweise Methoxigruppen bestehen. R is a saturated aliphatic, aromatic or cycloaliphatic Represents a hydrocarbon radical which, if necessary, can also be substituted by amino, epoxy groups or others. R can consist of alkoxy groups, preferably methoxy groups. 2) Zusätze nach Anspruch 1, dadurch gekennzeichnet, daß sie in Isolierungen aus vernetzten Polyolefinen, insbesondere in νernetztem Polyäthylen enthalten sind.2) additives according to claim 1, characterized in that they are in insulation made of crosslinked polyolefins, in particular in νernetztem polyethylene are included. 3) Zusätze nach Anspruch 1 und 2, dadurch gekennzeichnet, daß sie in Polyolefinen enthalten sind, die in heißen Wasserdampf vernetzt worden sind.3) additives according to claim 1 and 2, characterized in that they are contained in polyolefins which are in hot water vapor have been networked. k) Zusätze nach Anspruch 1 bis 3* dadurch gekennzeichnet, daß sie in einer als leitfähige Schicht ausgebildeten, rußhaltigen Grenzschicht einer Kabelisolierung enthalten sind. k) additives according to claim 1 to 3 *, characterized in that they are contained in a soot-containing boundary layer of a cable insulation designed as a conductive layer. 909808/0560909808/0560 ORIGINAL INSPECTEDORIGINAL INSPECTED
DE2737430A 1977-08-19 1977-08-19 Polyolefin insulation with a voltage stabilizer Expired DE2737430C2 (en)

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 true DE2737430A1 (en) 1979-02-22
DE2737430C2 DE2737430C2 (en) 1983-03-17

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DE2805875A Expired DE2805875C2 (en) 1977-08-19 1978-02-11 Polyolefin insulation with a voltage stabilizer as the boundary layer of cable insulation

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0023239A2 (en) * 1979-07-26 1981-02-04 Union Carbide Corporation Dielectric compositions stabilized against water treeing with organo silane compounds and electric wires or cables insulated with these compositions
FR2461734A1 (en) * 1979-07-19 1981-02-06 Nat Distillers Chem Corp POLYMER COMPOSITIONS RESISTANT TO ELECTRICAL AIGRETTES AND WATER AIGRETTES AND APPLICATION TO ISOLATION OF ELECTRIC CABLES
EP0025091A2 (en) * 1979-08-31 1981-03-18 kabelmetal electro GmbH Water-proof high voltage insulation for electric cables and process for its manufacture
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
US4299713A (en) * 1979-07-19 1981-11-10 National Distillers And Chemical Corp. Electrical tree and water tree resistant polymer compositions
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
EP0114495A2 (en) * 1982-12-27 1984-08-01 Dow Corning Corporation Anti-treeing additives
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
DE3643351A1 (en) * 1985-12-20 1987-06-25 Pirelli Cavi Spa ELECTRIC CABLES AND MATERIAL FOR MAKING THE CONDUCTOR
EP0274101A2 (en) * 1986-12-29 1988-07-13 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
US4840983A (en) * 1986-05-23 1989-06-20 Dow Corning Corporation Anti-treeing additives
US8283391B2 (en) 2007-08-06 2012-10-09 General Cable Technologies Corporation Tree resistant insulation compositions

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4400429A (en) 1980-12-22 1983-08-23 National Distillers And Chemical Corporation Tree retardant additive composition for polymeric insulation
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
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
DE3763270D1 (en) * 1986-08-04 1990-07-19 Siemens Ag ELECTRICAL INSULATION.
DE3628554A1 (en) * 1986-08-22 1988-03-03 Licentia Gmbh PLASTIC INSULATION
GB9113584D0 (en) * 1991-06-24 1991-08-14 Bp Chem Int Ltd Stabilised polymer composition and use
EP2107951B1 (en) * 2007-01-12 2013-07-10 Utilx Corporation Composition and method for restoring an electrical cable and inhibiting corrosion in the aluminum conductor core

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936572A (en) * 1970-01-05 1976-02-03 General Electric Company Electric cable insulated with a corona resistant polyethylene composition containing a silicon additive
DE2537283A1 (en) * 1975-08-20 1977-03-03 Furukawa Electric Co Ltd POWERFUL CABLE AND METHOD OF ITS MANUFACTURING

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936572A (en) * 1970-01-05 1976-02-03 General Electric Company Electric cable insulated with a corona resistant polyethylene composition containing a silicon additive
DE2537283A1 (en) * 1975-08-20 1977-03-03 Furukawa Electric Co Ltd POWERFUL CABLE AND METHOD OF ITS MANUFACTURING

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461734A1 (en) * 1979-07-19 1981-02-06 Nat Distillers Chem Corp POLYMER COMPOSITIONS RESISTANT TO ELECTRICAL AIGRETTES AND WATER AIGRETTES AND APPLICATION TO ISOLATION OF ELECTRIC CABLES
US4299713A (en) * 1979-07-19 1981-11-10 National Distillers And Chemical Corp. Electrical tree and water tree resistant polymer compositions
EP0023239A2 (en) * 1979-07-26 1981-02-04 Union Carbide Corporation Dielectric compositions stabilized against water treeing with organo silane compounds and electric wires or cables insulated with these compositions
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
EP0023239A3 (en) * 1979-07-26 1981-05-06 Union Carbide Corporation Dielectric compositions stabilized against water treeing with organo silane compounds and electric wires or cables insulated with these compositions
EP0025091A2 (en) * 1979-08-31 1981-03-18 kabelmetal electro GmbH Water-proof high voltage insulation for electric cables and process for its manufacture
DE2935224A1 (en) * 1979-08-31 1981-03-19 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover WATERPROOF HIGH VOLTAGE INSULATION FOR ELECTRIC CABLES
EP0025091A3 (en) * 1979-08-31 1981-09-02 Kabel- Und Metallwerke Gutehoffnungshutte Aktiengesellschaft Water-proof high voltage insulation for electric cables and process for its manufacture
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
EP0114495A2 (en) * 1982-12-27 1984-08-01 Dow Corning Corporation Anti-treeing additives
EP0114495A3 (en) * 1982-12-27 1984-10-17 Dow Corning Corporation Anti-treeing additives
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
DE3643351A1 (en) * 1985-12-20 1987-06-25 Pirelli Cavi Spa ELECTRIC CABLES AND MATERIAL FOR MAKING THE CONDUCTOR
US4840983A (en) * 1986-05-23 1989-06-20 Dow Corning Corporation Anti-treeing additives
EP0274101A2 (en) * 1986-12-29 1988-07-13 Dow Corning Corporation Restoring stranded conductor electrical distribution cable
US4766011A (en) * 1986-12-29 1988-08-23 Dow Corning Corporation Restoring stranded conductor electrical distribution cable
EP0274101A3 (en) * 1986-12-29 1990-05-09 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
EP0279905A3 (en) * 1987-01-26 1988-12-21 KABEL RHEYDT Aktiengesellschaft Plastic insulation material and process for its preparation
US4897312A (en) * 1987-01-26 1990-01-30 Licentia Patent-Verwaltungs-Gmbh Polymer-based electrical insulation and electrical conductor insulated therewith
US8283391B2 (en) 2007-08-06 2012-10-09 General Cable Technologies Corporation Tree resistant insulation compositions
EP2527396A2 (en) 2007-08-06 2012-11-28 General Cable Technologies Corporation Tree resistant insulation compositions

Also Published As

Publication number Publication date
DE2737430C2 (en) 1983-03-17
DE2805875C2 (en) 1983-05-26
DE2805875A1 (en) 1979-08-16

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