Preparation method of non-halogen flame-retarded makrolan/acrylonitrile-butadiene-styrene copolymer alloy

Abstract

The invention discloses a preparation method of halogen-free flame-retarded makrolan / acrylonitrile-butadiene-styrene copolymer alloy. The following are all showed according to weight portions: the non-halogen flame-retarded makrolan / acrylonitrile-butadiene-styrene copolymer alloy is obtained by drying 20-99 portions of polycarbonate, 80-1 portions of ABS resin, 0.1-1 portion of Teflon, 0.01-4.5 portions of sulphonate series flame retardant, 0.01-5 portions of organic silicon series flame retardant and 0.01-5 portions of nano assistant under the temperature of 85 to 105 DEG C for 4 to 8 hours, then the mixture is uniformly mixed, and added in a double screw extruder, extruding is carried out under the temperature of 230 to 250 DEG C at a rotating speed of 200 to 240 r / min, then cooling, drying and cutting granules are carried out. The preparation method utilizes the complex formulation of the sulphonate series flame retardant, the organic silicon series flame retardant and the nano assistant, thus forming a synergism system co-acted on by a plurality of flame retardants; the alloy obtained is halogen free and the total adding amount of the flame retardants is less; in a vertical burning experiment, the alloy shows effects of self extinguishing, no fused drop and thick and having firm carbon layers and can reach a grade from UL94 V0 to V1. The preparation method has the characteristics that the flame-retarding efficiency is high, the mechanical property is good, and the method is also environmental friendly.

Description

technical field [0001] The invention relates to a preparation method of a polymer alloy, in particular to a preparation method of a halogen-free flame-retardant polycarbonate / acrylonitrile-butadiene-styrene copolymer alloy. Background technique [0002] Bisphenol A polycarbonate (PC) has excellent impact toughness, electrical insulation, wide temperature range and stable product size. As an engineering plastic with good comprehensive performance, it is widely used in the manufacture of parts in the machinery industry and insulating materials in electrical engineering. However, polycarbonate also has defects such as easy stress cracking, sensitivity to notches, poor wear resistance and processing fluidity. In engineering, acrylonitrile-butadiene-styrene copolymer (ABS resin) is often blended with PC to improve the heat distortion temperature and impact strength of the material. PC / ABS is the earliest industrially produced polycarbonate modified product, which has the compre...

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Problems solved by technology

The disadvantage is that its applicable range is narrow, that is, the content of ABS components in PC / ABS alloys cannot exceed 17%; and with the increase of ABS components, the amount of various flame retardants and additives will be further increased. When the flame retardant ABS component is 17% of the PC / ABS alloy, the total amount of flame retardant and other additives reaches more than 17%, which deteriorates the mechanical properties of the PC / ABS alloy more, and the cost also increases with the to improve

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