Halogen-free flame retardant antistatic PC/ABS alloy material and preparation method thereof

Abstract

The invention discloses a halogen-free flame retardant antistatic PC / ABS (Poly Carbonate / Acrylonitrile Butadiene Styrene) alloy material and a preparation method thereof, belonging to the technical field of alloy materials. The halogen-free flame retardant antistatic PC / ABS alloy material provided by the invention comprises the following components in parts by weight: 1-30 parts of ABS resin, 40-90 parts of PC resin, 8-20 parts of fire retardant, 1-10 parts of flexibilizer, 0.02-0.5 part of antistatic agent, 0.1-1 part of photo-thermal stabilizing agent and 0.1-1 part of processing agent. The invention also discloses a preparation method of the halogen-free flame retardant antistatic PC / ABS alloy material, which comprises the following steps of: mixing the 1-30 parts of ABS resin, the 40-90 parts of PC resin, the 8-20 parts of fire retardant, the 1-10 parts of flexibilizer, the 0.02-0.5 part of antistatic agent, the 0.1-1 part of photo-thermal stabilizing agent and the 0.1-1 part of processing agent, and then sending to a dual-screw extruder, mixing, extruding, staying, cooling, sized-dicing and obtaining a finished product of the halogen-free flame retardant antistatic PC / ABS alloy material. The halogen-free flame retardant antistatic PC / ABS alloy material provided by the invention has the advantages of simple process, continuity, high production efficiency and stable quality.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a halogen-free flame-retardant antistatic PC / ABS alloy material and a preparation method thereof. Background technique [0002] PC / ABS (a blend of polycarbonate and acrylonitrile-butadiene-styrene copolymer) resin is an alloy material with excellent performance, with excellent physical and mechanical properties, surface hardness, high strength and flow And it has certain heat resistance, but its disadvantage is poor flame retardancy and high electrical insulation, so at present, various modifiers are added to PC / ABS alloy to improve its performance. Halogenated flame retardants have a good cost-effectiveness balance and are widely applicable. However, due to the large amount of smoke generated, the released gas is highly corrosive, and brominated flame retardants decompose into polybrominated dibenzos under certain conditions. Dioxane and polybrominated diben...

AI Technical Summary

Problems solved by technology

[0002] PC / ABS (a blend of polycarbonate and acrylonitrile-butadiene-styrene copolymer) resin is an alloy material with excellent performance, with excellent physical and mechanical properties, surface hardness, high strength and flow And it has a certain heat resistance, but its disadvantage is that its flame retardancy is poor and it has high electrical insulation, so it is necessary to add various modifiers to the PC / ABS alloy to improve its performance.

Halogenated flame retardants have a good cost-effectiveness balance and are widely applicable. However, due to the large amount of smoke generated, the released gas is highly corrosive, and brominated flame retardants decompose into polybrominated dibenzos under certain conditions. Dioxane and polybrominated dibenzofurans have strong carcinogenic effects. For this reason, traditional halogen-containing flame retardants are facing huge environmental pressure. Non-halogenation has become the main trend of flame retardant development and application. The high insulation of the polymer itself makes it difficult for static electricity to disappear from the charged plastic, which will cause dust to stick to the plastic product, electric shock to the user or operator of the product, abnormal operation of the counter or integrated circuit chip, etc. Therefore, it is necessary to conduct necessary research on preventing plastics from being charged with static electricity. The antistatic materials commonly used in the market are mainly to add some low molecular weight antistatic agents to the materials. The antistatic effect, but its main disadvantage is that the antistatic time is short, it is not washable, and the antistatic effect will be lost in a short time. At the same time, the flame retardancy of the material added with the halogen-free flame retardant may also be affected. Some permanent antistatic agents currently on the market use a large amount of addition (generally around 20% to play a role), which will have a certain impact on the mechanics and heat resistance of the material.