Low-cost high-flow weather-proof environment-friendly brominated flame retardant ASA material as well as preparation method and application thereof

Abstract

The invention discloses a low-cost high-flow weather-proof environment-friendly brominated flame retardant ASA (acrylonitrile styrene acrylate) material, which comprises the following components in parts by weight: 15-40 parts of ASA resin, 30-60 parts of styrene-acrylonitrile resin, 8-12 parts of environment-friendly brominated flame retardant, 5-20 parts of chlorinated polyethylene and 2-6 parts of novel environment-friendly flame retardant synergist. A preparation method for the ASA material comprises the steps as follows: adding the components into a high-speed mixer in sequence according to the proportion for uniformly mixing, and adding a mixture into a double screw extruder for mixing, extruding, pulling, water-cooling and dicing to obtain the ASA material. According to the ASA material, the addition amount of the flame retardant is lower than that of other conventional flame-retardant system by more than 1 / 3; through the test, the flame retardant level reaches UL94@1.0-3.0 mm V-0, the impact intensity is kept more than 10 kJ / m<2>, the melting index exceeds 42 g / 10 min, the weather-proof performance is excellent, and the other mechanical performance is balanced; the preparation method is simple and easy to implement; and the ASA material is easy to process and is suitable for popularization and application in the fields of outdoor electronic products and the like.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, in particular to a flame-retardant ASA material, in particular to a low-cost, high-flow, weather-resistant, environment-friendly brominated flame-retardant ASA material and its preparation method and application. Background technique [0002] ASA resin is a ternary graft copolymer composed of styrene, acrylate, and acrylonitrile. It is a non-crystalline polymer formed by grafting and copolymerizing acrylonitrile and styrene monomers with polyacrylate as the main chain. ASA was industrialized for the first time in 1962 by Germany's BASF, followed by Japan's Hitachi Chemical. [0003] Because ASA resin uses polyacrylate without double bond structure to replace polybutadiene rubber in ABS, it has become one of the best weather-resistant varieties in plastics, and its weather resistance is more than 10 times higher than that of ABS resin. However, ASA resin itself is also a flammable material...

AI Technical Summary

Problems solved by technology

Since ASA resin itself is mostly used in the field of outdoor electronic appliances due to its excellent weather resistance, the addition of so many brominated flame retardants will seriously deteriorate its weather resistance and lose its excellent weather resistance characteristics

Such as Chinese patent CN101397391 discloses tetrabromobisphenol A and antimony trioxide as flame retardants used for ASA resin flame retardant modification, but the weather resistance and heat resistance stability of tetrabromobisphenol A are all poor, it is added to ASA resin will reduce the weather resistance and thermal stability of ASA resin

Chinese patent CN101765635A discloses the ASA modified resin of brominated epoxy as flame retardant, because the weather resistance and heat resistance stability of brominated epoxy are all better than tetrabromobisphenol A, but the softening point of brominated epoxy resin is only At about 90 degrees, it is easy to agglomerate during the blending and extrusion process, affecting the metering system, and further affecting the flame retardant stability and mechanical properties of the final product

Chinese patent CN102002203A discloses the application of tris(tri-bromophenyl)cyanurate flame retardant in ASA flame retardant modification, the flame retardant better maintains the mechanical strength of ASA resin, weather resistance and thermal stability It is better than the flame-retardant ABS products of the same flame-retardant system, but because the total addition amount of it and antimony-based flame retardants is about 20%, such a large amount of addition leads to a certain degree of deterioration in weather resistance, and the fluidity of the system In general, not the best choice for forming thin-walled and large-scale parts

At the same time, due to the relatively high price of ASA resin itself, the addition of so many bromine-antimony composite flame retardants leads to a further increase in its cost, making it difficult to popularize and apply in the market