WO1996027885A1 - Composition de revetement pour un fil conducteur - Google Patents

Composition de revetement pour un fil conducteur Download PDF

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Publication number
WO1996027885A1
WO1996027885A1 PCT/GB1996/000501 GB9600501W WO9627885A1 WO 1996027885 A1 WO1996027885 A1 WO 1996027885A1 GB 9600501 W GB9600501 W GB 9600501W WO 9627885 A1 WO9627885 A1 WO 9627885A1
Authority
WO
WIPO (PCT)
Prior art keywords
php
coating composition
wire coating
coating
phosphorous
Prior art date
Application number
PCT/GB1996/000501
Other languages
English (en)
Inventor
Peter James Richardson
Joseph Preston
Dudley Noel Sawyer
Lai Ping Cheng
Original Assignee
Scapa Group Plc
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 Scapa Group Plc filed Critical Scapa Group Plc
Priority to EP96904945A priority Critical patent/EP0813741A1/fr
Priority to AU48859/96A priority patent/AU4885996A/en
Publication of WO1996027885A1 publication Critical patent/WO1996027885A1/fr

Links

Classifications

    • 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
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/04—Homopolymers or copolymers of ethene
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes

Definitions

  • the present invention relates to a wire coating composition.
  • wire used herein embraces both wires and cables.
  • halogenated polymers such as polyvinyl chloride (PVC).
  • PVC polyvinyl chloride
  • the main problem of PVC and other halogenated polymers is that upon combustion a large volume of toxic, acidic and highly corrosive hydrogen halide smoke is liberated.
  • halogen-free polymer compositions for coating cables or wires have been developed. Examples of such compositions are included in EP 082407A, EP 488381A and US 5032321.
  • These and other prior art halogen-free coating compositions which are based upon thermoplastic polymer/mineral filler mixtures, possess inadequate abrasion resistance, electrical insulation properties and temperature stability.
  • compositions of the type disclosed in EP 082407A, EP 488381A and US 5032321 may only be one fifth of that for PVC.
  • Similar compositions containing intu escent system flame retardants, such as ammonium polyphosphate, have also been shown to exhibit inadequate electrical resistance due to the fact that the flame retardant attracts moisture and therefore increases the electrical conductivity of the material. It is noted that conventional phosphorous-based flame retardant compounds are contained in relatively large amounts, usually up to 40 php for ammonium polyphosphate.
  • a disadvantage with red phosphorous-based system is that the cable coatings have a strong red colouring, which is disadvantageous for electrical cable coatings in general.
  • the aim of the invention is to provide a recyclable and/or reprocessable halogen-free coating composition with improved abrasion resistance, electrical insulation and temperature resistance properties without a deterioration in other physical properties, such as tensile strength or flexibility.
  • a wire coating composition comprising polypropylene polymer or copolymer, polyethylene wax and magnesium hydroxide provided with a hydrophobic coating and wherein the wire coating composition does not contain any halogen and is essentially free of phosphorous and phosphorous compounds and phosphorous salts.
  • composition is free from “phosphorous” or compounds or salts thereof or has a phosphorous content of less than 800 ppm.
  • the wire coating composition of the present invention exhibits the required coating characteristics, but unlike some PVC compounds is readily recyclable.
  • the coating composition of the invention further provides the required electrical insulation, while being flexible, flame resistant, heat stable to greater than 125°C, abrasion resistant, readily extrudable and recyclable.
  • the components of the composition are ideally present in the following ratio: polypropylene 100 php (parts per hundred polypropylene) ; magnesium hydroxide 100 to 200 and ideally
  • the coating compositions are particularly useful for wires in motor vehicle engines, such wires being subjected to high temperatures and contact with water and fluids such as petrol, diesel, oil, salt solution and anti-freeze. It is necessary for wire coating materials under vehicle bonnets to have a temperature rating of greater than 100°C, at which temperature the coating should remain stable and retain electrical insulation properties.
  • the coating compositions according to the invention possess a temperature rating of greater than 125°C.
  • Polyethylene wax is incorporated to improve abrasion resistance.
  • Hard high molecular wax components would provide excellent abrasion resistance, but would also increase the tendency for stress cracking of the coating to occur.
  • Being a relatively low molecular weight material polyethylene wax enhances abrasion resistance of the coating without having an adverse effect on other coating properties.
  • the magnesium hydroxide acts as a filler and flame retardant.
  • the magnesium hydroxide particles are coated with a hydrophobic material such as an alkyl silane, for example a trimethoxysilane or triethoxysilane.
  • the coating enhances adhesion between the filler particles and the polymer matrix, improves the abrasion resistance of the coating and most importantly, due to its hydrophobic nature, increases the resistance of the coating to moisture entrapment thereby maintaining electrical insulation properties.
  • Magnesium hydroxide is also stable at high temperatures, whilst its low surface area gives it a low viscosity. It is therefore easy to process.
  • the preferred amount of 140 php magnesium hydroxide content gives the ideal balance between flame retardance and flexibility.
  • a high filler content gives excellent flame retardance.
  • the coating will become much less flexible such that the coated wire will fail a standard conductance test whereby a wire is tightly coiled (typically around a 1mm diameter mandrel) and stored in hot water (normally 80°C) whilst under high voltage. If the coating is not flexible enough then it will crack at the coil heads.
  • compositions according to the invention are that they can be extruded onto wire or cable using existing extrusion equipment at speeds similar to that of PVC coatings.
  • a cost saving may be made by using the coating compositions of the invention using the high temperature rating of the coatings. Normally a copper wire becomes hot due to the conduction of the electrical current.
  • the high temperature rating of the coating means that thin layers of coating can be used on thin wires, representing a saving of expensive copper.
  • a preferred embodiment of the invention involves the incorporation into the composition of a synergistic blend of an anti-oxidant derived from phenol and anti-oxidant based upon a phosphite.
  • anti-oxidants are present in an amount of only 0.1 to 0.5 php.
  • phosphite contents are sufficiently low (770 ppm) to have a negligible moisture attraction capability.
  • good processability is retained without adversely effecting the other physical properties of the coating. This aids further reprocessing of the coatings and therefore improves the recyclability of the compositions.
  • the polymeric composition of the invention may optionally further comprise additives such as stabilisers, plasticisers, lubricants and further flame retardants.
  • Example 1 Composition: 100 php propylene polymer 1
  • Magnifin H5KV 2 coated with AMEO-T 3 5 php polyethylene wax 4 1 polymer comprises 20 php Appryl 3060 MMS (tradename of Atocheirt for a propylene copolymer) and 80 php Moplen D50-G (tradename of Hi ont for a propylene homopolymer) .
  • Appryl 3060 MMS has a melt flow index of 0.5g per minute at 230°C and 21. 6 kg.
  • Moplen D50-G has a melt flow index of 0.3g per minute at 230°C and 21.6 kg.
  • the trade name of the wax is A-C 9/9A (tradename of A llie d Wax). This has a drop point of 115°C and a density of 0.93 g/cm 3 .
  • composition was extruded onto a standard metal wire used for automotive electrical cable applications, at a rate of a b out 700 per minute, using the normal extrusion equipment for PVC-coated cables, to form a coated cable with a cross-sectional area of 2.5mm 2 .
  • Such cables would commonly b e used as alternator or battery leads in a motor vehicle engine.
  • Abrasion Behaviour measured 500 cycles DIN 72551 > 3000 in terms of the number of hub Point 3.3.3 cycles to retain a mm. thickness of 2.5 mm 2
  • composition 100 php propylene polymer 1
  • polyethylene wax 1 polymer comprises 40 php Appryl 3060 MMS and 60 php Moplen D50-9.
  • Example 2 also passed the relevant tests which were carried out in relation to the composition of Example 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Insulating Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

Une composition de revêtement pour un fil conducteur comprend pour 100 parties de polypropylène ou de copolymère de polypropylène: 1 à 20 parties de cire de polyéthylène et 100 à 200 parties d'hydroxyde de magnésium portant un enrobage hydrophobe. La composition de revêtement ne contient pas d'halogène et elle est sensiblement exempte de phosphore et de sels de phosphore.
PCT/GB1996/000501 1995-03-08 1996-03-06 Composition de revetement pour un fil conducteur WO1996027885A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP96904945A EP0813741A1 (fr) 1995-03-08 1996-03-06 Composition de revetement pour un fil conducteur
AU48859/96A AU4885996A (en) 1995-03-08 1996-03-06 Wire coating composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9504705.6 1995-03-08
GBGB9504705.6A GB9504705D0 (en) 1995-03-08 1995-03-08 Wire coating composition

Publications (1)

Publication Number Publication Date
WO1996027885A1 true WO1996027885A1 (fr) 1996-09-12

Family

ID=10770876

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/000501 WO1996027885A1 (fr) 1995-03-08 1996-03-06 Composition de revetement pour un fil conducteur

Country Status (6)

Country Link
EP (1) EP0813741A1 (fr)
AU (1) AU4885996A (fr)
CA (1) CA2214653A1 (fr)
CZ (1) CZ281697A3 (fr)
GB (1) GB9504705D0 (fr)
WO (1) WO1996027885A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0893801A1 (fr) * 1997-07-23 1999-01-27 PIRELLI CAVI E SISTEMI S.p.A. Câbles revêtus d'une couche recyclable et exempte d'halogène contenant du polypropylène et un copolymère d'éthylène, à grande récupération élastique
WO1999005688A1 (fr) * 1997-07-23 1999-02-04 Pirelli Cavi E Sistemi S.P.A. Cable autoextinguible a faible fumee et composition resistant aux flammes utilisee dans ce cable
WO1999013477A1 (fr) * 1997-09-09 1999-03-18 Nkt Research Center A/S Materiau isolant electriquement, son procede de preparation et objets isoles composes de ce materiau
US6255399B1 (en) 1997-07-23 2001-07-03 Pirelli Cavi E Sistemi S.P.A. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high structural uniformity
US6372344B1 (en) 1997-07-23 2002-04-16 Pirelli Cavi E Sistemi S.P.A. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high elastic recovery
US6410651B1 (en) 1997-07-23 2002-06-25 Pirelli Cavi E Sistemi S.P.A. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high structural uniformity
US6552112B1 (en) 1997-07-23 2003-04-22 Pirelli Cavi E Sistemi S.P.A. Cable with self-extinguishing properties and flame-retardant composition
US6849217B1 (en) 1998-12-24 2005-02-01 Pirelli Cavi E Sistemi S.P.A. Process for producing self-extinguishing cables with low-level production of fumes, and flame-retardant compositions used therein
US8227541B2 (en) * 2003-10-01 2012-07-24 Basf Se Additive mixtures

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227139A2 (fr) * 1985-11-27 1987-07-01 Shell Internationale Researchmaatschappij B.V. Compositions isolantes à base de polypropylène modifié dégageant peu de fumée, et leur procédé de préparation
EP0546841A1 (fr) * 1991-12-10 1993-06-16 Nippon Petrochemicals Company, Limited Compositions résistantes à l'abrasion et ignifuges
EP0575111A2 (fr) * 1992-06-15 1993-12-22 MITSUI TOATSU CHEMICALS, Inc. Matériau polymère isolant et article formé utilisant ce matériau

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227139A2 (fr) * 1985-11-27 1987-07-01 Shell Internationale Researchmaatschappij B.V. Compositions isolantes à base de polypropylène modifié dégageant peu de fumée, et leur procédé de préparation
EP0546841A1 (fr) * 1991-12-10 1993-06-16 Nippon Petrochemicals Company, Limited Compositions résistantes à l'abrasion et ignifuges
EP0575111A2 (fr) * 1992-06-15 1993-12-22 MITSUI TOATSU CHEMICALS, Inc. Matériau polymère isolant et article formé utilisant ce matériau

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU752111B2 (en) * 1997-07-23 2002-09-05 Prysmian Cavi E Sistemi Energia S.R.L. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high elastic recovery
US6410651B1 (en) 1997-07-23 2002-06-25 Pirelli Cavi E Sistemi S.P.A. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high structural uniformity
US6756447B2 (en) 1997-07-23 2004-06-29 Pierelli Cavi E Sistemi.S.P.A. Flame-retardant polymer composition comprising polypropylene and an ethylene copolymer having high structural uniformity
US6162548A (en) * 1997-07-23 2000-12-19 Pirelli Cavi E Sistemi S.P.A. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high elastic recovery
US6255399B1 (en) 1997-07-23 2001-07-03 Pirelli Cavi E Sistemi S.P.A. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high structural uniformity
AU736015B2 (en) * 1997-07-23 2001-07-26 Prysmian Cavi E Sistemi Energia S.R.L. Low-smoke self-extinguishing cable and flame-retardant composition used therein
WO1999005688A1 (fr) * 1997-07-23 1999-02-04 Pirelli Cavi E Sistemi S.P.A. Cable autoextinguible a faible fumee et composition resistant aux flammes utilisee dans ce cable
US6372344B1 (en) 1997-07-23 2002-04-16 Pirelli Cavi E Sistemi S.P.A. Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high elastic recovery
US6552112B1 (en) 1997-07-23 2003-04-22 Pirelli Cavi E Sistemi S.P.A. Cable with self-extinguishing properties and flame-retardant composition
EP0893801A1 (fr) * 1997-07-23 1999-01-27 PIRELLI CAVI E SISTEMI S.p.A. Câbles revêtus d'une couche recyclable et exempte d'halogène contenant du polypropylène et un copolymère d'éthylène, à grande récupération élastique
US6515231B1 (en) 1997-09-09 2003-02-04 Nkt Research Center A/S Electrically insulating material, method for the preparation thereof, and insulated objects comprising said material
AU740973B2 (en) * 1997-09-09 2001-11-15 Nkt Research Center A/S An electrically insulating material, method for the preparation thereof, and insulated objects comprising said material
WO1999013477A1 (fr) * 1997-09-09 1999-03-18 Nkt Research Center A/S Materiau isolant electriquement, son procede de preparation et objets isoles composes de ce materiau
US6849217B1 (en) 1998-12-24 2005-02-01 Pirelli Cavi E Sistemi S.P.A. Process for producing self-extinguishing cables with low-level production of fumes, and flame-retardant compositions used therein
US8227541B2 (en) * 2003-10-01 2012-07-24 Basf Se Additive mixtures

Also Published As

Publication number Publication date
CZ281697A3 (cs) 1998-01-14
CA2214653A1 (fr) 1996-09-12
EP0813741A1 (fr) 1997-12-29
GB9504705D0 (en) 1995-04-26
AU4885996A (en) 1996-09-23

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