# US 2008/0188589 A1 · Power or Communications Cable With Flame Retardant Polymer Layer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0188589 A1 - Document ID: US20080188589A1 - Status: Published application - Kind: A1 - Application number: 11/884,504 - Filed: 2006-02-22 - Published: 2008-08-07 - Earliest claimed: 2005-02-23 - Assignees: Borealis Technology Oy - Inventors: Bernt-Ake Sultan; Jonas Jungkvist; Urban Andreason; Lars-Erik Ahlstrand - Web page: https://patentgrep.com/patent/US20080188589A1 ## CPC - H01B 7/295: using material resistant to flame - C08L 21/00: Compositions of unspecified rubbers - C08L 23/04: Homopolymers or copolymers of ethene - C08L 23/0869: with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters - H01B 3/441: {from alkenes} - C08L 83/04: Polysiloxanes - C08L 2203/202: use in electrical wires or wirecoating - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The present invention in a first embodiment relates to a conduit or automotive wire consisting of an inner conductor core surrounded by a flame retardant layer made of a polymer composition in a continuous process which composition comprises (A) an olefin homo- and/or copolymer, (B) a silicone-group containing compound, and (C) an inorganic filler, wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, and the wire has a length of at least 100 m. In a second embodiment, the present invention relates to a power or communications cable or wire comprising a flame retardant layer made of a polymer composition comprising (A) an olefin homo- and/or copolymer, (B) a silicone-group containing compound, and (C) an inorganic filler, wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, the cable or wire further comprising at least one further layer. ## Claims ### Claim 1 A wire consisting of an inner conductor core surrounded by a flame retardant layer made of a polymer composition in a continuous process which composition comprises (A) an olefin homo- and/or copolymer, (B) a silicone-group containing compound, and (C) an inorganic filler, wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, and the wire has a length of at least 100 m. ### Claim 2 (depends on 1) A wire according to claim 1 wherein the flame retardant layer has a thickness of 0.1 to 4 mm. ### Claim 3 (depends on 1) A wire according to claim 1 which further has an outer skin layer with a maximum thickness of 0.4 mm. ### Claim 4 (depends on 1) A wire according to claim 1 wherein the conductor core area is from 0.1 to 400 mm2. ### Claim 5 A power or communications cable or wire comprising a flame retardant layer made of a polymer composition comprising (A) an olefin homo- and/or copolymer, (B) a silicone-group containing compound, and (C) an inorganic filler, wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, the cable or wire further comprising at least one further layer. ### Claim 6 (depends on 5) A power or communications cable or wire according to claim 5 wherein the flame retardant layer is produced in a continuous process and the cable or wire has a length of at least 100 m. ### Claim 7 (depends on 5) A power or communications cable or wire according to claim 5 wherein component (A) is a copolymer or a mixture of copolymers of an olefin with one or more comonomers selected from the group of non-substituted or substituted acrylic acids according to formula (I): H2C═CR—COOH (I) wherein R is H or an organic substituent. ### Claim 8 (depends on 7) A power or communications cable or wire according to claim 7 wherein the type of comonomer of component (A) is selected from acrylic acid and methacrylic acid. ### Claim 9 (depends on 5) A power or communications cable or wire according to claim 5 wherein the polymer composition passes the single wire burning test according to EN 60332-1. ### Claim 10 (depends on 5) A power or communications cable or wire according to claim 5 wherein the polymer composition has a maximum processing temperature of 200° C. or below. ### Claim 11 (depends on 5) A power or communications cable or wire according to claim 5 wherein the flame retardant layer has an abrasion resistance of at least 100. ### Claim 12 (depends on 5) A power or communications cable or wire according to claim 5 wherein the thickness of the flame retardant layer is from 0.1 to 4 mm. ### Claim 13 (depends on 5) A power or communications cable or wire according to claim 5 which has been produced by extruding the flame retardant layer with a line speed of at least 20 m/min. ### Claim 14 (depends on 5) A power or communications cable or wire according to claim 5 which has been produced by extruding the flame retardant layer onto with a pressure of 50 to 500 bar. ### Claim 15 (depends on 5) A power or communications cable or wire according to claim 5 wherein the amount of inorganic filler (C) is from 20 to 60 wt.-% of the total polymer composition. ### Claim 16 (depends on 5) A power or communications cable or wire according to claim 5 wherein inorganic filler (C) is neither a hydroxide nor a hydrated compound. ### Claim 17 (depends on 5) A power or communications cable or wire according to claim 5 wherein component (B) is present in the composition in such an amount that the total amount of silicone groups in the composition is from 1 to 20 wt-%. ### Claim 18 (depends on 5) A power or communications cable or wire according to claim 5 wherein silicone-group containing compounds (B) is a silicone fluid and/or a gum and/or an olefin copolymer comprising a silicone-group containing monomer. ### Claim 19 (depends on 5) A power or communications cable or wire according to claim 5 wherein component (A) is present in the polymer composition in an amount of 30 to 70 wt.-%. ### Claim 20 Process for the production of a power or communications cable or wire comprising the extrusion of a polymer composition which comprises (A) an olefin homo- and/or copolymer, (B) a silicone-group containing compound, and (C) an inorganic filler, wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, as a flame retardant layer of the cable or wire, wherein the extrusion is performed at a line speed of at least of 20 m/min. ### Claim 21 (depends on 20) Process according to claim 20 wherein the extrusion is performed with a pressure of 50 to 500 bar. ### Claim 22 (depends on 20) Process according to claim 20 wherein the cable or wire is a conduit or automotive wire consisting of a conductor core and the flame retardant layer, optionally further comprising a skin layer with a maximum thickness of 0.4 mm. ### Claim 23 Method of producing a polymer composition comprising (A) an olefin homo- and/or copolymer, (B) a silicone-group containing compound, and (C) an inorganic filler, wherein the ratio of the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of component (A) to the MFR2 measured under a load of 2.16 kg and at a temperature of 190° C. of the composition is higher than 3.5, for the production of a flame retardant layer of a power or communication cable or wire by extrusion, wherein the extrusion is performed at a line speed of at least of 20 m/min. ### Claim 24 (depends on 23) A method according to claim 23 wherein the extrusion is performed with a pressure of 50 to 500 bar. ### Claim 25 (depends on 23) A method according to claim 23 wherein the cable or wire is a conduit or automotive wire consisting of an conductor core and the flame retardant layer, optionally further comprising a skin layer with a maximum thickness of 0.4 mm.