Halogen-free flame retardant glass fiber reinforced polyphenyl ether/polystyrene composition and preparation method thereof
A technology of polystyrene and polyphenylene ether, applied in the field of polymer alloy materials, can solve the problem of reducing the strength and rigidity of glass fiber reinforced polyphenylene ether and its alloy materials, changes in the melt viscosity of alloy materials, and large amounts of flame retardants added and other problems, to achieve the effect of good molding performance, smooth surface and high fluidity
Active Publication Date: 2014-10-08
广东顺威赛特工程塑料开发有限公司
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Problems solved by technology
However, in order to reach the UL-94-FV0 level, usually a large amount of phosphate or phosphate flame retardants is added, and most phosphate flame retardants have a strong plasticizing effect, which greatly reduces the glass fiber reinforcement. Strength and rigidity of polyphenylene ether and its alloy materials
Moreover, due to the addition of a large amount of flame retardants and glass fibers, the melt viscosity of the alloy material changes sharply, and the melt strength decreases, resulting in the interruption of the extrusion process, making the granulation difficult and difficult to process.
Method used
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Embodiment 1-5
[0029] The preparation method of embodiment 1-5 is as follows:
[0030] a. Add other components except alkali-free glass fiber, silane coupling agent and flame retardant synergist into the high-speed mixer, add silane coupling agent and flame retardant synergist while stirring at low speed, and mix for 3 to 5 minutes;
[0031] b. The mixture obtained in step a is added to the twin-screw extruder from the first barrel feeding section of the twin-screw extruder, and the alkali-free glass fiber is added to the twin-screw extruder from the fourth barrel of the twin-screw extruder, and extruded grain;
[0032] Wherein the screw length-to-diameter ratio of the twin-screw extruder is 32-68, the rotational speed of the twin-screw extruder is 180-500 rpm, and the temperature is 215-255°C.
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Abstract
The invention discloses a halogen-free flame retardant glass fiber reinforced polyphenyl ether/polystyrene composition and a preparation method thereof. According to the composition, microcapsule-wrapped red phosphorus master batch is compounded with a flame retardant synergist to maintain the reinforcement and toughening effects of an alkali-free glass fiber to a polyphenyl ether and polystyrene composition, and the weight ratio of the microcapsule-wrapped red phosphorus master batch to the flame retardant synergist is (4-6) to (6-3). The halogen-free flame retardant glass fiber reinforced polyphenyl ether/polystyrene composition disclosed by the invention is high in strength, good in toughness; a flame retardant is environment-friendly, free of halogen, small in addition amount, high in flowability, smooth in surface, good in forming and processing property, low in cost and relatively good in practical applicability, and the flame retarding grade (2mm) is of Fv-0.
Description
【Technical field】 [0001] The invention relates to a polyphenylene ether / polystyrene combination and a preparation method thereof, in particular to a halogen-free flame-retardant glass fiber reinforced polyphenylene ether / polystyrene composition and a preparation method thereof, belonging to the technical field of polymer alloy materials . 【Background technique】 [0002] Polyphenylene ether resin (PPE or PPO for short) is a high-temperature-resistant thermoplastic general-purpose engineering plastic, and is one of the five major engineering plastics; polystyrene (PS) is a thermoplastic general-purpose plastic with abundant raw materials and low price. Polystyrene has good compatibility and can be mixed in any proportion without reducing the mechanical properties too much. The alloy material prepared by blending polyphenylene ether and polystyrene has excellent comprehensive properties and is currently the largest and most widely used alloy material. One of the most extensive...
Claims
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IPC IPC(8): C08L25/06C08L71/12C08K13/06C08K9/10C08K3/02C08K7/14C08K3/34
Inventor 胡世军汪克风胡天赐刘珍元彭万段为白福青
Owner 广东顺威赛特工程塑料开发有限公司
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