Halogen-free flame-retardant heat-resistant weather-resistant polypropylene nano composite insulating material for automobile wire and preparation method thereof

Abstract

The invention relates to a halogen-free heat-resistant weather-resistant polypropylene nano composite insulating material for an automobile wire and a preparation method thereof. The composite insulating material is prepared from 50-60 parts of polypropylene nano compounds and 50-60 parts of halogen-free flame-retardant master batches. The polypropylene nano compounds are prepared from, by weight, 100 parts of polypropylene, 10-15 parts of polypropylene polar monomer grafts, 4.0-8.0 parts of nano inorganic compounds and the like. The halogen-free flame-retardant master batches are prepared from, by weight, 100 parts of organic hydroxide, 20-30 parts of carrier resin and the like. By the adoption of the binary technology, the polypropylene nano compounds and the halogen-free flame-retardant master batches high in flame-retardant agent content are prepared, the polypropylene nano compounds and the halogen-free flame-retardant master batches are mixed, extruded and granulated through a double-screw extruding machine, and the nano composite insulating material is obtained. The material is low in cost and environmentally friendly, integrates excellent physical and mechanical performance and electric performance and good extruding processability, is suitable for insulating processing of the automobile original wire, and can be used for insulating wrapping of communication cables, logging cables and oil-submerged pump cables.

Description

Technical field [0001] The invention relates to a halogen-free flame-retardant, heat-resistant and weather-resistant polypropylene nano composite insulating material for automobile wires and a preparation process thereof, and belongs to the technical field of halogen-free flame-retardant polypropylene nano composite materials. Background technique [0002] Automobile wires are used in a non-closed environment with high vibration, high temperature and oil pollution. Therefore, their insulating materials are required to be flame-retardant, heat-resistant, weather-resistant and oil-resistant. In the prior art, automobile wires generally use PVC as an insulating material, and most wires that cannot use PVC are generally distributed in a high-temperature environment such as the engine compartment. They generally use thermosetting plastics as the insulating material. The advantage of PVC material is that it is cheap, flame-retardant and easy to process, but it contains harmful substanc...

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Problems solved by technology

For example, the Chinese patent ZL200610038234.0 halogen-free flame-retardant polypropylene high-speed wear-resistant insulating material for automobile primary wire uses a three-component intumescent flame retardant of the phosphorus nitrogen system. The long-term insulation performance is unqualified; Chinese patent CN102295804A is a kind of thermoplastic halogen-free flame-retardant material for automobile wires and its preparation and application. The color cannot be adjusted; Chinese patent CN104530547A is a thermoplastic low-smoke, halogen-free and highly flame-retardant material for automobile wires and its preparation method uses ethylene-vinyl acetate base material, resulting in low working temperature and adding a large amount of inorganic hydroxide Flame retardant, which deteriorates the processing and mechanical properties of the material; Chinese patent CN103172923A, a high-temperature-resistant thermoplastic flame-retardant material for automobile wires and its preparation method is an improvement of the preparation process of thermosetting materials

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