Flame retardant polymer composition with improved mechanical properties

Abstract

The present invention relates to a flame retardant polymer composition comprising: (A) an ethylene copolymer comprising polar comonomer units, (B) a compound comprising silicone groups , (C) an inorganic filler material, and (D) an ethylene homopolymer or an ethylene copolymer having one or more other α-olefin comonomer units, wherein the polymer composition The enthalpy of fusion is at least 78 J / g; the invention also relates to an article, especially a wire or cable, comprising said composition; Use in fire layers for improving the mechanical properties of said wires or cables.

Description

technical field [0001] The present invention relates to a flame-retardant polymer composition with improved mechanical properties; it also relates to an article, especially a wire or cable, which article comprises said flame-retardant polymer composition; it also relates to a Use of an ethylene homopolymer or copolymer for improving the mechanical properties of the flame retardant composition. Background technique [0002] In order to improve the flame retardancy of polymers, there are several methods known in the art. A first method is known to incorporate halide-containing compounds into polymers. However, these materials have the disadvantage of generating harmful and corrosive gases such as hydrogen halides upon combustion. This is also a disadvantage of PVC-based flame retardant polymer compositions. [0003] In another approach, the flame retardant composition contains a relatively large amount (typically 50-60 wt %) of inorganic fillers, like for example hydrates a...

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Problems solved by technology

[0006] Although this composition has good flame retardant properties, the mechanical properties of the composition can still be improved in order to meet the more stringent mechanical requirements especially for power cables

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