Flame retardant polymer composition with improved mechanical properties
AssigneeBorealis AG
InventorsBernt-Ake Sultan, Wendy Loyens
Life of this patent
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Abstract
A flame retardant polymer composition comprising (A) an ethylene copolymer comprising polar comonomer units, (B) a silicone-group containing compound, (C) an inorganic filler material, and (D) an ethylene homopolymer or a copolymer of ethylene with one or more other alpha-olefin comonomer units, wherein the polymer composition has a melting enthalpy of at least 78 J/g, an article, in particular a wire or cable, comprising said composition and the use of an ethylene homo- or copolymer in a flame retardant layer of a wire or cable for improving the mechanical properties of the wire or cable.
Claims16
A flame retardant polymer composition comprising
- (A) an ethylene copolymer comprising polar comonomer units,
- (B) a silicone-group containing compound,
- (C) an inorganic filler material, and
- (D) an ethylene homopolymer or a copolymer of ethylene with one or more other alpha-olefin comonomer units,
- wherein the inorganic filler material (C) is present in an amount of 20 to 45 wt % of the total composition, the ethylene homo- or copolymer (D) is present in an amount of 15 wt % or more of the total composition, and has a density of 940 to 960 kg/m3, determined according to ISO 1183, and
- wherein the polymer composition has a melting enthalpy of at least 78 J/g.
Method for producing a flame retardant layer for a wire or cable, comprising compounding:
- (A) an ethylene copolymer comprising polar comonomer units,
- (B) a silicone-group containing compound,
- (C) an inorganic filler material, and
- (D) an ethylene homopolymer or a copolymer of ethylene with one or more other alpha-olefin comonomer units,
- to form a polymer composition,
- wherein the inorganic filler material (C) is present in an amount of 20 to 45 wt % of the total composition, the ethylene homo- or copolymer (D) is present in an amount of 15 wt % or more of the total composition, and has a density of 940 to 960 kg/m3, determined according to ISO 1183, wherein the polymer composition of the flame retardant layer has a melting enthalpy of at least 78 J/g for improving the mechanical properties of the wire and cable.
Dependencies are inferred from the claim text.