NO844852L - INSULATION MATERIALS - Google Patents

INSULATION MATERIALS

Info

Publication number
NO844852L
NO844852L NO844852A NO844852A NO844852L NO 844852 L NO844852 L NO 844852L NO 844852 A NO844852 A NO 844852A NO 844852 A NO844852 A NO 844852A NO 844852 L NO844852 L NO 844852L
Authority
NO
Norway
Prior art keywords
vinyl acetate
cross
weight
ethylene
ethylene vinyl
Prior art date
Application number
NO844852A
Other languages
Norwegian (no)
Inventor
Thomas Andreas Klett
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of NO844852L publication Critical patent/NO844852L/en

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30Insulators 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
    • H01B3/44Insulators 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

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Insulated Conductors (AREA)
  • Glass Compositions (AREA)
  • Organic Insulating Materials (AREA)

Description

Foreliggende oppfinnelse angår en polymerblanding som er tverrbindbar med silan, og særlig en polymerblanding av denne type egnet for ommantling av elektriske og/eller optiske kabler og tråder, hvilken polymerblanding inneholder kopolymerer av etylenvinylacetat og etylenbutylakrylat med organisk silan podet derpå for tverrbindingsprosessen, en tverrbindingskatalysator samt et f iamiriehemmende f yl Ima ter ia le . Polymerblandinger av den ovennevnte type er kommersielt tilgjengelige for bruk til ommantling av kabler og tråder. Når en katalysator tilsettes, blir de hovedsakelig bearbeidet ved ekstrudering, og under ekstru-deringen vil materialene på grunn av påvirkning av fuktigheten til den omgivende atmosfære og på grunn av den podede silan, gjennomløpe en silantverrbinding eller vulkanisering. Som katalysator benyttes f.eks. dibutyl-tinn, dilaurat i form av en 10% batch basert på etylenvinylacetat (EVA). Silantverrbindingen kan akselleres ved å dykke det ekstruderte produktet ned i varmt vann eller utsette det for vanndamp. Det tverrbundne produktet oppviser en forlengelse ved brudd på ca. 130% og en oksygenindeks på 29%. Med henblikk på enkelte praktiske anvendelser av materialet vil det ikke være tilstrekkelig flammebestandig, noe som indikeres av den relativt lave oksygenindeks. Med dette materialet er det ikke mulig å øke de flammebestandige egenskaper ved å tilsette ytterligere aluminiumshydroksyd. Dessuten vil materialet ved enkelte anvendelser ha for liten fleksibilitet. The present invention relates to a polymer mixture which can be cross-linked with silane, and in particular a polymer mixture of this type suitable for sheathing electrical and/or optical cables and wires, which polymer mixture contains copolymers of ethylene vinyl acetate and ethylene butyl acrylate with organic silane grafted thereon for the cross-linking process, a cross-linking catalyst and a f iamirie-inhibiting f yl Ima ter ia le . Polymer mixtures of the above type are commercially available for use in sheathing cables and wires. When a catalyst is added, they are mainly processed by extrusion, and during the extrusion the materials, due to the influence of the humidity of the surrounding atmosphere and due to the grafted silane, will undergo a silane cross-linking or vulcanization. As a catalyst, e.g. dibutyl tin, dilaurate in the form of a 10% batch based on ethylene vinyl acetate (EVA). The silane cross-linking can be accelerated by immersing the extruded product in hot water or exposing it to steam. The cross-linked product exhibits an elongation at break of approx. 130% and an oxygen index of 29%. With a view to certain practical applications of the material, it will not be sufficiently flame resistant, which is indicated by the relatively low oxygen index. With this material, it is not possible to increase the flame-resistant properties by adding additional aluminum hydroxide. In addition, the material will have too little flexibility in some applications.

Formålet med foreliggende oppfinnelse er å modifisere den ovennevnte polymerblanding på en slik måte at det tverrbundne produkt oppviser en vesentlig bedret flammebestandighet samt større fleksibilitet. Dette oppnås ved å benytte de forholds-regler som er tatt i karakteristikken til krav 1 nedenfor. The purpose of the present invention is to modify the above-mentioned polymer mixture in such a way that the cross-linked product exhibits significantly improved flame resistance as well as greater flexibility. This is achieved by using the precautions taken in the characteristics of claim 1 below.

Andre fordelaktige utførelser er omtalt i underkravene.Other advantageous embodiments are discussed in the subclaims.

Ved å kombinere den ovennevnte polymerblanding med en etylenvinylacetat-kopolymer med et vinylacetatinnhold på 50%, oppnås at blandingen kan oppta en betydelig mengde aluminiumhydroksyd, og derved forbedres flammebestandigheten til sluttproduktet. Samtidig viser det seg at sluttproduktet har en betydelig høyere fleksibilitet enn den ovennevnte polymerblanding. Til tross for denne modifikasjonen kan blandingen tverrbindes på samme måte som de konvensjonelle typer av polymerblandinger som er tverrbindbare med silan. Sluttproduktet viser seg å ha en forlengelse ved brudd på 150%, og etterkommer derfor i større grad kravene til VDE 0207, pkt. 27 enn utgangsblandingen. Oksygenindeksen beløper seg nå til ca. 4 0%, noe som medfører at de flammehemmende egenskaper er blitt betydelig bedret. Derfor blir det også ved tynne kabler mulig å etterkomme kravene til flammebestandighet i henhold til VDE 0472, pkt. 804, metode C. Til tross for den høyere fyllgraden er det modifiserte materiale mer fleksibelt enn det ovennevnte silantverrbundne materialet. By combining the above polymer mixture with an ethylene vinyl acetate copolymer with a vinyl acetate content of 50%, it is achieved that the mixture can absorb a significant amount of aluminum hydroxide, thereby improving the flame resistance of the final product. At the same time, it turns out that the final product has a significantly higher flexibility than the above-mentioned polymer mixture. Despite this modification, the composition can be cross-linked in the same way as the conventional types of polymer compositions cross-linkable with silane. The end product turns out to have an elongation at break of 150%, and therefore complies to a greater extent with the requirements of VDE 0207, point 27 than the starting mixture. The oxygen index now amounts to approx. 4 0%, which means that the flame retardant properties have been significantly improved. Therefore, even with thin cables, it becomes possible to comply with the requirements for flame resistance according to VDE 0472, item 804, method C. Despite the higher degree of filling, the modified material is more flexible than the above-mentioned silane cross-linked material.

Den tverrbindbare polymerblanding i henhold til foreliggende oppfinnelse har en sammensetning innenfor områdene som er spesi-fisert nedenfor, hvor etylenvinylacetat er betegnet som EVA, og hvor vinylacetat er betegnet som VA: The crosslinkable polymer mixture according to the present invention has a composition within the ranges specified below, where ethylene vinyl acetate is denoted as EVA, and where vinyl acetate is denoted as VA:

Den foretrukne blanding består av følgende komponenter: The preferred mixture consists of the following components:

Den tverrbundne isolasjonsmasse har følgende egenskaper: The cross-linked insulating material has the following properties:

Tverrbindingstiden for ekstrudat av ca. 1 mm tykkelse er ca. 3 timer i varmtvannsbad ved 7 0°C ved tilsetting av de vanlige katalysatorer på 3% som batch. The cross-linking time for extrudate of approx. 1 mm thickness is approx. 3 hours in a hot water bath at 70°C by adding the usual catalysts at 3% as a batch.

Claims (3)

1. Polymerblanding som er tverrbindbar med silan, og som egner seg for ommantling av elektriske og/eller optiske kabler og ledninger, hvilken blanding inneholder kopolymerer av etylenvinylacetat og etylenbutylakrylat, en organisk silan podet derpå for å oppnå tverrbinding, en tverrbindingskatalysator samt et flammebestandig fyllstoff, karakterisert ved at blandingen dessuten inneholder 3-15 vektprosent av den totale mengde med etylenvinylacetat med et vinylacetatinnhold på 50% samt 21-32 vektprosent aluminiumhydroksyd i forhold til den totale mengden.1. Polymer mixture which can be cross-linked with silane, and which is suitable for sheathing electrical and/or optical cables and wires, which mixture contains copolymers of ethylene vinyl acetate and ethylene butyl acrylate, an organic silane grafted thereon to achieve cross-linking, a cross-linking catalyst and a flame-resistant filler , characterized in that the mixture also contains 3-15% by weight of the total amount of ethylene vinyl acetate with a vinyl acetate content of 50% and 21-32% by weight of aluminum hydroxide in relation to the total amount. 2. Polymerblanding ifølge krav 1, karakterisert ved at innholdet av organisk silan-podet kopolymerer av etylenvinyl-acetat og etylenbutyl-akrylat og den tverrbindende katalysator beløper seg fra 53 til 75 vektprosent av den totale mengde.2. Polymer mixture according to claim 1, characterized in that the content of organic silane-grafted copolymers of ethylene vinyl acetate and ethylene butyl acrylate and the cross-linking catalyst amounts from 53 to 75 percent by weight of the total amount. 3. Polymerblanding ifølge krav 1 eller 2, karakterisert ved følgende sammensetning: 145 vektdeler flammebestandig podet kopolymer av etylenvinyl-acetat og etylenbutyl-akrylat og katalysator, 40 vektdeler etylenvinyl-acetat kopolymer med 50% vinylacetat og 85 vektdeler aluminiumhydroksyd.3. Polymer mixture according to claim 1 or 2, characterized by the following composition: 145 parts by weight flame-resistant graft copolymer of ethylene vinyl acetate and ethylene butyl acrylate and catalyst, 40 parts by weight ethylene vinyl acetate copolymer with 50% vinyl acetate and 85 parts by weight aluminum hydroxide.
NO844852A 1983-12-09 1984-12-05 INSULATION MATERIALS NO844852L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833344588 DE3344588C2 (en) 1983-12-09 1983-12-09 Polymer mixture for sheathing cables and wires

Publications (1)

Publication Number Publication Date
NO844852L true NO844852L (en) 1985-06-10

Family

ID=6216513

Family Applications (1)

Application Number Title Priority Date Filing Date
NO844852A NO844852L (en) 1983-12-09 1984-12-05 INSULATION MATERIALS

Country Status (8)

Country Link
EP (1) EP0148416A3 (en)
AU (1) AU578256B2 (en)
BE (1) BE903192A (en)
DE (1) DE3344588C2 (en)
FR (1) FR2556356B1 (en)
GB (1) GB2151236B (en)
NO (1) NO844852L (en)
NZ (1) NZ210343A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8502928D0 (en) * 1985-02-05 1985-03-06 Bicc Plc Cross-linkable compositions
US4732939A (en) * 1986-01-20 1988-03-22 Sumitomo Bakelite Company Limited Flame-retardant olefinic resin compositions
EP0280761B1 (en) * 1987-03-02 1993-03-03 Sumitomo Bakelite Company Limited Flame-retardant olefinic resin composition
DE3921442C2 (en) * 1989-06-30 1995-06-01 Kabelmetal Electro Gmbh Empty cable for fiber optic cables
DE10248174C1 (en) 2002-10-16 2003-11-13 Nabaltec Gmbh Flame-retardant thermoplastic, thermoset or thermosetting and/or elastomeric polymer composition, for producing coated electrical wire or cable by extrusion, contains aluminum hydroxide with specified properties as flame retardant
DE10342728B3 (en) * 2003-09-16 2005-08-18 Raumedic Ag Filling tube, useful for filling medical products, e.g. blood into bags, comprises outer layer of polypropylene and inner layer of silane-crosslinked ethylene copolymer
CN103497411B (en) * 2013-09-27 2016-04-13 杭州师范大学 A kind of flexible high heat conductive insulating polymer composite and preparation method thereof
US11512192B2 (en) 2017-12-15 2022-11-29 Byk-Chemie Gmbh Thermoplastic composition having improved flame retardant properties

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518355A (en) * 1974-07-11 1976-01-23 Showa Electric Wire & Cable Co KAKYOSEISOSEIBUTSU
US4349605A (en) * 1980-09-09 1982-09-14 National Distillers & Chemical Corp. Flame retardant radiation curable polymeric compositions
IE51762B1 (en) * 1980-09-09 1987-03-18 Nat Distillers Chem Corp Flame retardant ethylene-ester copolymer hydrated filler compositions
DE3047269C2 (en) * 1980-12-16 1983-08-04 AEG-Telefunken Kabelwerke AG, Rheydt, 4050 Mönchengladbach "Thermoplastic Polymer Mixture"
JPS58118828A (en) * 1982-01-06 1983-07-15 Showa Electric Wire & Cable Co Ltd Preparation of flame-retardant crosslinked polyolefin molding
CA1221188A (en) * 1982-04-26 1987-04-28 James W. Biggs Flame retardant crosslinked ethylene copolymer electrical insulation
GB2149802B (en) * 1983-11-16 1987-03-18 Standard Telephones Cables Ltd Oil resistant flame retardent ethylene polymer compositions

Also Published As

Publication number Publication date
BE903192A (en) 1986-03-06
GB2151236A (en) 1985-07-17
EP0148416A2 (en) 1985-07-17
AU578256B2 (en) 1988-10-20
EP0148416A3 (en) 1985-08-21
AU3586184A (en) 1985-06-13
NZ210343A (en) 1988-01-08
FR2556356A1 (en) 1985-06-14
GB8429596D0 (en) 1985-01-03
DE3344588C2 (en) 1994-12-15
FR2556356B1 (en) 1986-09-19
DE3344588A1 (en) 1985-06-20
GB2151236B (en) 1987-06-24

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