Low-smoke halogen-free flame-retardant thermoplastic elastomer and preparation method thereof

Abstract

The invention discloses a low-smoke halogen-free flame-retardant thermoplastic elastomer and a preparation method thereof. The low-smoke halogen-free flame-retardant thermoplastic elastomer comprises the following components in percentage by weight: 10-40% of styrene elastomer, 10-30% of polyphenylether resin, 10-30% of polyolefin compound, 10-30% of nitrogen flame retardant, 10-40% of softening oil, 2-5% of mineral soil, 2-5% of organic silicon compound and less than 5% of non-flame-retardant additive. The preparation method comprises the following steps: putting various raw materials which are stirred and mixed evenly into a double screw extruder, carrying out melt kneading and extrusion, and cooling the molten output object extruded from the extruder die head to obtain granules. The low-smoke halogen-free flame-retardant thermoplastic elastomer has equivalent comprehensive properties to the polymer system with nitrogen-phosphorus expansion flame retardant. The invention reduces the smoke quantity, effectively solves the problem of influence on the ecological environment, has the advantage of high recycling rate, has certain economic benefit and social benefit, and can be widely used in the fields of halogen-free flame retardance of automobiles, construction, electronics, electrical wires and the like. The preparation method of the low-smoke halogen-free flame-retardant thermoplastic elastomer is simple and has the advantage of high production efficiency.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic polymer materials, and in particular relates to a low-smoke, halogen-free flame-retardant thermoplastic elastomer and a preparation method thereof. Background technique [0002] Thermoplastic elastomer, also known as artificial rubber or synthetic rubber, is a new type of organic polymer synthetic material with excellent properties such as high elasticity, aging resistance, oil resistance, wear resistance, and environmental protection. It has become the latest material to replace traditional rubber. Flame retardants are special chemical additives used to improve the flame retardancy of thermoplastic elastomers. Thermoplastic elastomers added with flame retardants can effectively prevent, delay or terminate the spread of flames when attacked by external fire sources, thereby To achieve the role of flame retardancy. [0003] Flame retardants are generally divided into halogenated flame retard...

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Problems solved by technology

At present, magnesium hydroxide and aluminum hydroxide are important environmentally friendly halogen-free flame retardants that are widely used in smoke reduction, smoke suppression, and flame retardancy. However, there are also some shortcomings in practical applications: such as a large amount of , poor compatibility with polymers, affecting the mechanical properties and processing properties of polymer matrix resins, etc.

[0005] In addition, a lot of research is currently focused on adding nitrogen-phosphorous intumescent flame retardants to polymer systems, which can significantly reduce the content of flame retardants, but the added phosphorus-based flame retardants will produce different phosphorus compounds after burning, and smoke A large amount will cause adverse effects on the ecological environment

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