Low-inner-stress high-anti-impact fire-proof ABS composition as well as preparation method and application thereof

Abstract

The invention discloses a low-inner-stress high-anti-impact fire-proof ABS composition as well as a preparation method and application thereof. The ABS composition is prepared from the following ingredients in parts by weight: 35 to 75 parts of ABS resin, 15 to 25 parts of fire-proof systems, 10 to 40 parts of elastomers, 5 to 10 parts of modifying agents and 0.1 to 5 parts of coupling agents. Theprepared ABS composition has high toughness, high fire-proof performance and ultralow inner stress, and is very suitable for being popularized and applied to plastic rubber products with metal inserts, fire-proof plastic rubber products with electric plating requirements on the surface and heating welding fire-proof rubber products and in regions with great diurnal temperature variation.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a low internal stress, high impact flame-retardant ABS composition and a preparation method and application thereof. Background technique [0002] ABS resin is a terpolymer composed of styrene, butadiene and acrylonitrile. It combines the high fluidity of styrene, the rubber toughness of butadiene and the chemical resistance of acrylonitrile. It has excellent processing performance, Low temperature resistance, electrical insulation, chemical corrosion resistance, high gloss and excellent electroplating performance, as well as good creep resistance, high dimensional stability, small molding shrinkage, etc., are widely used in military industry, automobiles, electronic appliances, etc. The field of application is very wide. [0003] However, on the one hand, the oxygen index of ABS resin is only 18, which is a flammable material. Therefore, flame retardant modificatio...

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Problems solved by technology

On the other hand, ABS resin is a sea-island structure with styrene-acrylonitrile copolymer as the continuous phase and butadiene rubber as the dispersed phase. Adding about 15-25% of the flame retardant system will partially destroy the sea-island structure of the ABS blend. - Island structure, which in turn leads to a significant decrease in the toughness of the ABS matrix resin

Although the toughness of ABS resin can be effectively regulated by the content, particle size and distribution of butadiene rubber, while regulating the toughness of ABS resin, the internal stress of ABS resin will gradually increase. For example, when the toughness of ABS resin reaches 25 kJ / m 2 When the internal stress exceeds 2000kPa, such a large internal stress will cause flame-retardant plastic products with metal inserts, flame-retardant plastic products whose surface needs to be electroplated, flame-retardant plastic products heated and welded, and places with large temperature differences between day and night. The cracking of the product during the use of the region will lead to the premature failure of the entire product