High-fluidity low-smoke zero-halogen flame retardant polyolefin composite and preparation method thereof

Abstract

The invention relates to a high-fluidity low-smoke zero-halogen flame retardant polyolefin composite and a preparation method of the high-fluidity low-smoke zero-halogen flame retardant polyolefin composite. The composite comprises the following components by weight: a matrix resin comprising 40-60 parts of high density polyethylene and 5-10 parts of ethylene-vinyl acetate copolymer, a flame retardant comprising 20-30 parts of halogen-free flame retardant, 5-10 parts of zinc borate and 1-5 parts of flaming retardance synergist, 10-15 parts of flow modifier, 1-2 parts of lubricant, 2-5 parts of compatilizer, 0.1-0.5 part of interfacial modifier, 0.3-0.5 part of antioxidant, and 0.3-0.5 part of anti-ultraviolet agent. The preparation method comprises the following steps of preparing and mixing the components, extruding, pelleting, water-cooling, sized-dicing, and drying. Compared with the prior art, the high-fluidity low-smoke zero-halogen flame retardant polyolefin composite has the following characteristics that the material has excellent fluidity (the melt index is up to 9-12 g / 10min) and excellent flame retardant property (the oxygen index is up to 32-34%). The composite further has the advantages of low smoke, zero halogen, excellent dripping resistance, excellent ultraviolet resistance, excellent anti-aging property and good processability.

Description

technical field [0001] The invention relates to a thermoplastic halogen-free flame-retardant composite material, in particular to a high-fluidity low-smoke halogen-free flame-retardant polyolefin composite material and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] At present, the preparation of halogen-free flame-retardant polyolefin materials mostly achieves high flame-retardant performance by adding a large amount of inorganic flame retardants (hydroxides). However, due to the poor compatibility between the matrix resin and the inorganic flame retardant, adding a large amount of inorganic flame retardants will lead to deterioration of its mechanical properties, corrosion resistance, electrical properties, etc., and also make the material lack of flexibility. Flow processing performance is significantly reduced, resulting in processing difficulties. A good flame-retardant polyolefin composite material not onl...

AI Technical Summary

Problems solved by technology

Although the addition of ethylene-vinyl acetate copolymer grafted with maleic anhydride improves the interfacial compatibility of the composite material and improves the overall performance of the material to a certain extent, this method not only adds 90-130 parts of inorganic resist Combustion agent, resulting in a significant decline in the flow processability of the composite material, the melt mass flow rate is low, and the preparation method of the ethylene-vinyl acetate copolymer grafted with maleic anhydride used in this invention is more cumbersome

[0009] It can be seen from the above prior art that in the process of preparing halogen-free flame-retardant polyolefin materials, most of them use hydroxide inorganic flame retardants with a large amount of addition, and use organic flame retardants and inorganic flame retardants as compounds. Research on composite flame retardants is less

Secondly, it can be found from the prior art that there are few reports on improving the final fluidity of composite materials by adding flow modifiers.

Improving the flame retardancy and improving the fluidity of polyolefin composite materials is a mutually restraining solution. If the flame retardancy is improved, the fluidity will decrease. If the fluidity is improved, the flame retardancy will decrease.

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