Low-shrinkage high-toughness ABS (Acrylonitrile Butadiene Styrene) composite and preparation method thereof

Abstract

The invention relates to a low-shrinkage high-toughness ABS (Acrylonitrile Butadiene Styrene) composite and a preparation method thereof. The composite comprises ingredients in percentage by weight: 20-40% of PC, 40-60% of ABS, 5-15% of a flexibilizer, 10-25% of talcum powder, 0.3-1.0 of an antioxidant, and 0.5-2% of others. The preparation method comprises the steps of: according to the proportion, adding the PC, ABS and other raw materials into a mixer for mixing for 10-20minutes, extruding the premixed materials through an extruder, drawing and performing water cooling through a water tank, blowing to be dry for dragging to a stock cutter so as to complete dicing, thereby obtaining the low-shrinkage high-toughness ABS composite. The composite has small low-temperature shrinkage which is smaller than 0.25 and less than half of the normal shrinkage of the ABS under the condition of - 20 DEG C, and the composite also has good low-temperature impact property, and the impact strength can achieve 25kJ / m<2>; and the preparation technique is simple, and the cost is low, thereby having good application prospects.

Description

technical field [0001] The invention belongs to the field of ABS composite material and its preparation, in particular to a low-shrinkage high-toughness ABS composite material and a preparation method thereof. Background technique [0002] PC is an engineering plastic with excellent performance. It has excellent mechanical properties, dimensional stability, heat resistance and cold resistance. advantage. On the one hand, it can improve the heat resistance, impact resistance and tensile properties of ABS, making ABS used in high-end fields; on the other hand, it can reduce the melt viscosity of PC, improve the flow of PC, and improve its processing performance. Reduce the internal stress of the product, reduce the sensitivity of impact strength to notch and thickness, so that PC can be used in the manufacture of thin-walled long-process products. In recent years, PC / ABS alloys have been widely used in mobile phones, computer casings, electrical connectors and other supplies...

AI Technical Summary

Problems solved by technology

The current PC / ABS alloy has the following disadvantages, first: the compatibility between PC and ABS is not good, resulting in poor overall mechanical properties of the alloy; second: the flame retardancy is not good, and the content of halogen elements is too high , has a certain pollution effect on the environment; third: poor impact strength, especially at low temperature, its impact toughness will be sharply reduced, which will easily lead to material failure; fourth: anti-oxidation ability and anti-ultraviolet radiation ability Poor, the service life of the material is not high

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