Regenerated PA6 (polyamide 6)-base flame-retardant electric-insulating heat-conducting composite material, and preparation method and application thereof

Abstract

The invention discloses a regenerated PA6 (polyamide 6)-base flame-retardant electric-insulating heat-conducting composite material, and a preparation method and application thereof. The regenerated PA6-base flame-retardant electric-insulating heat-conducting composite material is composed of the following components in percentage by weight: 18-50% of regenerated PA6 resin, 40-70% of electric-insulating heat-conducting agents, 1-10% of nitrogen flame retardant, 0.1-0.5% of anti-dripping agent, 1-6% of whitener, 0.5-2.0% of surface treatment modifier, 0.1-0.8% of antioxidant and 0.2-1.0% of lubricant. By compounding the regenerated PA6 resin, common electric-insulating heat-conducting agent and high-efficiency electric-insulating heat-conducting agent and adding the nitrogen flame retardant according to the preferable formula, the electric-insulating heat-conducting agents are subjected to a coating-single screw extrusion-double screw extrusion continuous production technique by the high-speed mixer, so that the prepared composite material has the characteristics of favorable flame retardancy, high heat conductivity, favorable electric insulativity, low density, low cost, favorable processibility and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a regenerated PA6-based flame-retardant, insulating and heat-conducting composite material and its preparation method and application. Background technique [0002] PA resin is the most important engineering plastic, and its output ranks first among the five general-purpose engineering plastics. As an engineering plastic, PA has high mechanical strength, high softening point, heat resistance, low friction coefficient, wear resistance, self-lubrication, and shock absorption. It has excellent performance and noise reduction, oil resistance, weak acid resistance, alkali resistance, good electrical insulation, self-extinguishing property, good weather resistance, and the fluidity of PA is very good, which is especially important for highly filled reinforced materials. Therefore, PA resin is widely used in automobiles, electronic appliances, light indus...

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Problems solved by technology

[0004] At present, the flame retardant PA on the market mainly uses bromine-antimony compound flame retardants. Although the addition amount is small and the flame retardant efficiency is high, it will emit toxic and harmful gases when burned, and it does not comply with the European Union's environmental protection "RoHS" directive, so the development is useless. Toxic and harmless halogen-free flame retardant PA resin is necessary

In other patents related to heat conduction, silicon carbide, boron nitride, aluminum nitride, graphite, carbon fiber, etc. are added. Although the thermal conductivity is high, it cannot achieve the purpose of insulation, and the cost is high, so it is not suitable for large-scale promotion in the market.

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