A kind of high glow wire halogen-free flame-retardant reinforced PPO/PA alloy and preparation method thereof

Abstract

The present invention relates to a high glow wire halogen-free flame retardant reinforced PPO / PA alloy and a preparation method thereof. The alloy comprises by weight: 10-30% of PPO, 10-50% of PA, 3-10% of a compatilizer, 5-15% of a phosphorus-based flame retardant, 2-10% of an intumescent flame retardant, 0.2-3% of a smoke inhibitor, 10-40% of alkali-free glass fiber, 2-10% of a flexibilizer, 0.2-2% of a carbonizing agent, 0.2-0.5% of an antioxidant, and 0.2-1.0% of a lubricant. The present invention also relates to a preparation method of the alloy, comprising: weighing each component as a weight ratio, putting into a high-speed mixer to mix the material for discharging, and extruding for granulation by a twin-screw extruder. The invention has the advantages that: smoke emission of the alloy is small, the alloy can fully meet the product with a thickness above 0.8mm, the temperature of the glow wire GWIT is no less than 850 DEG C, flame retarding is at UL94-V0 grade, the alloy is in accordance with VDE requirements, fully meets the requirements of injection molding process and meets the EU RoHS, IEC non-halogenation and Reach regulatory requirements, is low in cost, good in dimensional stability, and easy to dye, and has good market prospects.

Description

technical field [0001] The invention relates to a PPO / PA alloy material and a preparation method thereof, in particular to a high glow wire halogen-free flame-retardant reinforced PPO / PA alloy and a preparation method thereof. Background technique [0002] Polyphenylene oxide (PPO) has good mechanical properties, chemical stability, dielectric properties, heat resistance and flame retardancy, and is a high-performance thermoplastic engineering plastic. However, the molecular chain of PPO is relatively rigid and is very sensitive to notch impact. At the same time, due to its high melt viscosity, it cannot be injection molded, which greatly limits its application. PPO is rarely used alone, and more than 90% of commercial products are blended with other polymers or chemically modified. Polyamide (PA, nylon), as one of the toughest thermoplastic engineering plastics with excellent performance and widely used, has good processing fluidity and is easy to process and shape; due to...

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Problems solved by technology

Polyamide (PA, nylon), as one of the toughest thermoplastic engineering plastics with excellent performance and widely used, has good processing fluidity and is easy to process and shape; due to the amide bond in its molecular structure, it is easy to form hydrogen bonds, so It has excellent mechanical properties, thermal properties, cold resistance and creep resistance, but it is precisely because of the existence of hydrogen bonds that it has high water absorption and poor dimensional stability

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