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A kind of high glow wire halogen-free flame-retardant reinforced PPO/PA alloy and preparation method thereof
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A high-glow wire and alloy technology, applied in the field of PPO/PA alloy materials and its preparation, can solve the problems of high water absorption and poor dimensional stability, and achieve the effect of low cost, good dimensional stability and optimized processing performance
Inactive Publication Date: 2015-12-09
SHANGHAI SUNNY
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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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Embodiment 1～6
[0030] The high glow wire halogen-free flame retardant reinforced PPO / PA alloy material involved in the following examples, the components and weight percentages of the compositions in each example are shown in Table 1; the preparation method is as follows:
[0031] (1) Put the components into the high mixer according to the weight ratio and mix them, and discharge;
[0032] (2) If a solid phosphorus-based flame retardant is used, it is blended with other raw materials in step (1) in a high-speed mixer, and added from the first section of the twin-screw extruder;
[0033] (3) If liquid phosphorus flame retardant is used, it is added from the fifth barrel of the twin-screw extruder through the feeding pump;
[0034] ⑷The glass fiber is added from the fourth barrel of the twin-screw extruder;
[0035] (5) Twin-screw extruder extrudes and granulates, and alkali-free long fibers are added through the glass fiber inlet of the extruder.
[0036] It should be noted that the specifi...
Embodiment 7
[0050] Embodiment 7, performance test
[0051] Performance tests were performed on the halogen-free flame-retardant reinforced PPO / PA alloy material samples obtained in Examples 1-6. The mechanical properties were tested according to ASTM standards, the glow wire temperature was tested according to the IEC60695 standard, and the flame resistance was tested according to the UL94 standard. The properties of the compositions obtained in Examples 1-6 are shown in Table 2.
[0052] Table 2
[0053]
[0054]
[0055] The invention adopts a suitable compatibilizer, improves the compatibility between polyphenylene ether, nylon and glass fiber, and optimizes the processing performance of the alloy. Compared with the existing technology, the material performance is good, the smoke release is small, and it can fully meet the product thickness of 0.8mm or more, the glow wire temperature GWIT≥850°C, the flame retardant UL94-V0 level, meets the VDE requirements, and fully meets the i...
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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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