High-impact resistant halogen-free flame-proof polycarbonate and vinyl cyanide-butadiene-styrene resin alloy and method of producing the same

Abstract

The invention relates to a high impact resistant halogen-free flame retardant alloy of polycarbonate and acrylonitrile-butadiene-styrene resin and a method for preparing the same. The special material is prepared from the following components in mass percentage: 60 to 70 percent of PC resin, 20 to 23 percent of ABS resin, 5 to 10 percent of flame retardant, 1 to 3 percent of compatilizer, 0.5 percent of antioxidant, 0.5 percent of light stabilizer, and 0.5 percent of anti-dripping agent. The preparation method comprises the following steps: (1) stirring the PC resin and the flame retardant, the compatilizer, and the anti-dripping agent at a rotational speed of between 300 and 500 revolutions per minute for 5 minutes; (2) adding the ABS resin, the antioxidant, and the light stabilizer to the mixture and stirring the mixture at the rotational speed of between 400 and 500 revolutions per minute for 3 minutes, and then stirring the mixture at a rotational speed of between 700 and 800 revolutions per minute for 5 minutes to obtain a premix; and (3) extruding and granulating the premix in an extruder under vacuum condition to obtain the finished product. The high impact resistant halogen-free flame retardant alloy not only has good flame retardant property, but also has good mechanical property, in particular quite high notched impact performance, thus the alloy can be applied to the fields of electron and electricity, automobile, medical equipment, machinery and the like.

Description

technical field [0001] The invention relates to a high-impact halogen-free flame-retardant polycarbonate and acrylonitrile-butadiene-styrene resin alloy and a preparation method thereof. Background technique [0002] Polycarbonate (PC) has outstanding impact properties, transparency, dimensional stability, excellent mechanical properties and electrical properties, high glass transition temperature, heat distortion temperature, and wide service temperature range, and is widely used in Electronics, construction, packaging, medical equipment, optical instruments and other fields, and rapidly develop into aviation, aerospace, computer and other fields. However, PC resin has disadvantages such as poor processing fluidity, easy stress cracking, and sensitivity to notches, which limit its application in many fields. The blending modification of PC resin and ABS resin can expand the application range of PC. [0003] PC resin itself has good flame retardancy (oxygen index is 21% to...

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Problems solved by technology

Organophosphorus flame retardants have the characteristics of excellent flame retardancy, low toxicity, and good heat resistance, but they will lead to a decrease in the mechanical properties of the matrix material; silicon-containing flame-retardant polymers have low combustion calorific value, less smoke and non-toxicity when burning, The flame propagation speed is slow, and at the same time, it can improve the mechanical properties and heat resistance of the matrix resin, but the cost of using it alone is relatively high

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