A kind of halogen-free flame-retardant thermoplastic polyester elastomer material and preparation method thereof

Abstract

The invention discloses a halogen-free flame-retardant thermoplastic polyester elastomer material and a preparation method thereof. The halogen-free flame-retardant thermoplastic polyester elastomer material comprises the following components in percent by mass: 50%-70% of thermoplastic polyester elastomer, 8%-15% of linear phenolic resin, 10%-15% of an ammonium polyphosphate flame retardant, 5%-20% of melamine phosphate, 2%-5% of modified nano montmorillonite and 1%-2% of an assistant. A preparation method of the halogen-free flame-retardant thermoplastic polyester elastomer material comprises the following steps: adding the 50%-70% of thermoplastic polyester elastomer, 8%-15% of linear phenolic resin, 10%-15% of the ammonium polyphosphate flame retardant, 5%-20% of melamine phosphate, 2%-5% of modified nano montmorillonite and 1%-2% of the assistant into a stirrer for stirring uniformly; feeding into a screw rod by a primary feeding system of a twin-screw extruder, blending and pelletizing by an extruder, and carrying out compression molding onto particles by a vulcanizing press. The material disclosed by the invention improves system compatibility while achieving flame retardant efficiency, and reduces loss strength of mechanical performances.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a halogen-free flame-retardant thermoplastic polyester elastomer (TPEE) material and a preparation method thereof. Background technique [0002] Thermoplastic polyester elastomer, referred to as TPEE or COPE, is a type of polyester containing PBT (polybutylene terephthalate) polyester hard segment (crystalline phase) and aliphatic polyester or polyether (amorphous phase) soft segment Linear block copolymers. TPEE is a high-performance engineering-grade elastomer, which has the advantages of high mechanical strength, good elasticity, impact resistance, creep resistance, cold resistance, bending fatigue resistance, oil resistance, chemical corrosion resistance and solvent erosion, etc., and has good processability, and It can be filled, reinforced and alloyed, and has been widely used in auto parts, hydraulic hoses, cables and wires, electronic appliances, in...

AI Technical Summary

Problems solved by technology

For most thermoplastic polyester materials, halogen-containing flame retardants and their synergist antimony trioxide are used, but because recent studies have shown that halogen-containing flame retardants will release carcinogens during combustion, and in 2002, the European Union The WEEE and ROHS directives were promulgated, which limited the application of halogen flame retardants and also determined the direction of future flame retardants

So far, only a few multinational companies have developed halogen-free flame-retardant TPEE with excellent performance and stable products, such as DuPont and DSM. At the same time, the development of halogen-free flame-retardant TPEE materials is also a frontier topic, and there are few relevant literature reports

In addition, the existing research on flame retardant systems often neglects the other. Even if a certain property of the flame retardant material is improved, other properties are not improved or worse.

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