A kind of low smoke density ul94-5va grade flame retardant abs material and preparation method thereof

Abstract

The invention discloses a low smoke density UL94-5VA grade flame retardant ABS material, and a preparation method thereof. The low smoke density UL94-5VA grade flame retardant ABS material is composedof, by mass, 55.5 to 76.5% of ABS resin, 8 to 16% of a bromine series fire retardant, 2 to 6% of a synergistic flame retardant, 2 to 10% of magnesium salt whisker, 3 to 10% of water washed montmorillonite, 3 to 8% of a flexibilizer, 0.1 to 0.3% of an anti-oxidant, and 0.2 to 0.5% of a lubricant. The preparation method is simple; technical operation is convenient; and the obtained low smoke density UL94-5VA grade flame retardant ABS material is capable of satisfying requirements of household electrical appliance, vehicles, and the electronic and electric industry on product safety.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a UL94-5VA grade flame-retardant ABS material with low smoke density and a preparation method thereof. Background technique [0002] Acrylonitrile-butadiene-styrene (ABS) resin is a thermoplastic polymer material with high strength, good toughness, and easy processing and molding. It is widely used in electronics, home appliances, automobiles, construction, daily necessities and other fields. ABS is a good insulating material, and its electrical properties do not change greatly with changes in temperature and humidity. [0003] Like most organic polymer materials, ABS resin is a combustible material with a low limiting oxygen index (18.3%-18.8%), which belongs to the HB level according to the UL94 standard. ABS burns fast when it catches fire, and emits a large amount of poisonous gas and black smoke, which will bring great threats to people's life safety a...

AI Technical Summary

Problems solved by technology

Most of the conventional flame-retardant ABS materials can meet the requirements of UL94-V0, but it is difficult to further improve the flame-retardant grade to the UL94-5V level, especially the UL94-5VA level of thin-walled small parts

At the same time, the biggest threat of combustion to people is not the flame, but the smoke. At present, the flame retardant modification of ABS is mainly focused on preventing combustion, and to a certain extent, the problem of reducing the amount of combustion smoke is ignored.

Images