Crosslinkable flame-retardant resin composition, and insulated electrical wire and wire harness each obtained with the same

Abstract

The present invention provides a cross-linking type flame-retardant resin composition excellent in flame retardancy, abrasion resistance, flexibility, workability and compatibility with other materials, and insulated electric wires and wire harnesses using the composition. The composition comprises 100 parts by weight of resin component, 30-250 parts by weight of (C) metal hydrate and 1-20 parts by weight of (D) zinc compound, and the resin component contains MFR of 5 g / 10min or lower, (A) polyethylene with a density of 0.90 g / m3 or higher and selected from (B1) α-olefin (co)polymers, (B2) ethylene-vinyl ester copolymers, (B3) ethylene-α, β- (B) at least one polymer of unsaturated alkyl carboxylate copolymer and (B4) styrene thermoplastic elastomer, wherein the content of (A) polyethylene is 30-90 wt%, and the content of (B) polymer is 70-10 wt%, and (B) component is acid-modified and / or further contains 0.3-10 wt% of (E) organic functional coupling agent. The composition is used for insulating electric wires and wire harnesses.

Description

technical field [0001] The present invention relates to a crosslinking type flame retardant resin composition, and insulated wires and wire harnesses using the same; more particularly to a crosslinking type flame retardant resin composition suitable for insulating covering materials such as Insulated electric wires used in parts of automobiles, electric / electronic equipment, etc., and related to insulated electric wires and wire harnesses using the composition. Background technique [0002] Conventionally, in carrying out wiring of parts of vehicles such as automobiles, electric / electronic equipment, etc., as insulating covering materials for their insulated wires, vinyl chloride resins having excellent flame retardancy are generally widely used, according to including Various properties required for mechanical properties such as abrasion resistance, tensile strength and tensile elongation, flexibility and processability, etc., may be mixed with additives such as plasticizer...

AI Technical Summary

Problems solved by technology

[0003] However, there is a problem in that vinyl chloride resin, which is inherently flame retardant, contains halogens in its molecular chain, so that harmful halogen-containing gases are released into the atmosphere when vehicles are caught on fire or burned for incineration disposal of electrical / electronic equipment , causing environmental pollution

[0009] Further, since vinyl chloride resin compositions etc. are usually frequently used as a base material of a wire harness protective material wound around a wire harness, as a result, when non-halogen-containing insulated wires come into contact with the vinyl chloride wire harness protective material etc. in use, create compatibility issues