Flame-retardant and heat-resistant acrylonitrile-butadiene-styrene (ABS) resin and preparation method thereof

Abstract

The invention relates to a flame-retardant and heat-resistant acrylonitrile-butadiene-styrene (ABS) resin and a preparation method thereof. The resin comprises the following components in part by weight: 60 parts of ABS resin, 5 to 20 parts of maleinimide copolymer, 6 to 40 parts of inorganic phosphorus flame retardant, 2 to 15 parts of polyhydric compound, 0.05 to 2.5 parts of metal compound, 0.1 to 3 parts of crystalline aluminosilicate, 0.1 to 1 part of main antioxidant, 0.1 to 1 part of auxiliary antioxidant and 0 to 1 part of other auxiliary agents. The preparation method comprises the following steps of: uniformly mixing the raw materials in a high-speed stirrer; shearing, blending and melting the mixture in a double-screw extruder; and extruding, staying, cooling and granulating the mixture to obtain the product. Compared with the prior art, flame retardation modification is performed by a halogen-free flame retardant system in which polyphosphoric ester serves as the main component; the heat resistance is improved through the maleinimide copolymer; and the prepared material has the advantages of high heat resistance, high flame retardant property, and small smoke volume, low toxicity and environmental friendliness when combusted.

Description

technical field [0001] The invention relates to an ABS resin and a preparation method thereof, in particular to a flame-retardant and heat-resistant ABS resin and a preparation method thereof. Background technique [0002] ABS resin is a thermoplastic resin with good comprehensive performance and easy processing and molding, so it is widely used in the fields of electromechanical, chemical, military, electronic and electrical appliances. With the development of society and the improvement of people's quality of life, more and more materials are required to be heat-resistant and fire-resistant. However, the heat resistance and flame retardancy of ABS resin itself are not high. The heat deflection temperature of ordinary ABS resin is generally around 75°C, and the heat resistance of halogen-free flame-retardant ABS is even worse, and the heat deflection temperature is generally around 65°C, which makes the product unable to be used at higher temperatures. In addition, the oxy...

AI Technical Summary

Problems solved by technology

The heat distortion temperature of ordinary ABS resin is generally around 75°C, and the heat resistance of halogen-free flame-retardant ABS is even worse, and the heat distortion temperature is generally around 65°C, which makes the product cannot be used at higher temperatures

In addition, the oxygen index of ordinary ABS resin is 18.3-20.0, and the vertical combustion cannot meet the UL94V-2 standard. It will also release a large amount of smoke and harmful gases when burning. The maximum smoke density (Dm) is expressed at 720 This also limits the application of ABS

[0003] At present, the most commonly used method to simultaneously improve the flame retardancy and heat resistance of ABS resins is to use polycarbonate and ABS resins to intermix, and then use ABS or polyolefin grafts (mainly maleic anhydride, etc.) as compatibilizers. , with the addition of halogen-free flame retardants, the heat-resistant and flame-retardant PC / ABS alloy prepared is characterized by flame retardancy and high heat-resistant temperature, but the cost is much higher than that of flame-retardant ABS, and there are defects in processing difficulties, so that Their widespread application is also limited