Efficient flame-retardant plastic alloy and preparation method thereof

Abstract

The invention discloses an efficient flame-retardant plastic alloy and a preparation method thereof. The method comprises the following steps of: drying 45-80 parts by weight of polycarbonate powder and 10-20 parts by weight of acrylonitrile-butadiene-styrene plastic powder respectively for 3-4 hours; (2) pouring the polycarbonate powder, the acrylonitrile-butadiene-styrene plastic powder, 0.1-0.2 part by weight of benzenesulfonyl potassium sulfonate and 2-5 parts by weight of a styrene-maleic anhydride copolymer into a horizontal stirrer, and mixing and stirring for 10-15 minutes; and (3) adding 8-10 parts by weight of phosphoric acid ester, mixing, stirring, pouring into an extruder for heating and melting, drawing, cooling and extruding efficient flame-retardant plastic alloy particles. Due to the adoption of a halogen-free flame retardant, the plastic alloy product is nontoxic and environmental-friendly, and has efficient flame retardancy, excellent mechanical property and excellent heat resistance.

Description

technical field [0001] The invention belongs to the field of polymer plastic alloy materials, and in particular relates to a plastic alloy using a halogen-free flame retardant and a preparation method thereof. Background technique [0002] Polycarbonate / acrylonitrile-butadiene-styrene plastic alloy, that is, PC / ABS plastic alloy is a polycarbonate modified product that has been industrialized earlier, and is an important engineering plastic alloy. PC / ABS plastic alloy combines the advantages of both PC and ABS, has good impact resistance and heat resistance, and has good flow properties. Due to the high melting point of PC and poor processing fluidity, the product is prone to stress cracking, has strong sensitivity to notches, and is expensive. Blending ABS resin with PC resin, on the one hand, improves the heat resistance and mechanical properties of ABS, on the other hand, reduces the cost and melt viscosity of PC, improves fluidity, improves its processability, and reduc...

AI Technical Summary

Problems solved by technology

At present, a large number of halogen-free flame retardants used in PC alloys are basically phosphate-based flame retardants, but it is often necessary to add a large amount of phosphate esters to the alloy to obtain high flame retardancy. However, the addition of these phosphate esters will The mechanical properties and heat resistance of the material are greatly reduced. At the same time, since most of the phosphate esters are small molecules, they are liquids or solids with low melting points at room temperature, and there are problems of precipitation and uneven dispersion. Usually, special liquids need to be added for further processing. material device or peristaltic pump, which will undoubtedly increase the production cost and complicate the process

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