High-impact high-weather-resistance environmental-friendly brominated flame-retardant ASA material and preparation method and application thereof

Abstract

The invention discloses a high-impact high-weather-resistance environmental-friendly brominated flame-retardant ASA (Acrylonitrile-styrene-acrylate) material which comprises the following components in part by weight: 15 to 40 parts of ASA resin, 30 to 60 parts of styrene-acrylonitrile resin, 7 to 12 parts of environmental-friendly brominated flame retardant, 5 to 20 parts of chlorinated polyethylene and 2 to 6 parts of novel environmental-friendly flame-retardant synergist. The preparation method comprises the following steps: sequentially adding the components into a high-speed mixer to uniformly mix according to a certain proportion; and then adding the mixture into a double-screw extruder to carry out mixing, extrusion, bracing, water cooling and sized dicing to obtain the high-impact high-weather-resistance environmental-friendly brominated flame-retardant ASA material. According to the high-impact high-weather-resistance environmental-friendly brominated flame-retardant ASA material disclosed by the invention, the adding amount of the flame retardant is less than the use amounts of current other flame-retardant systems by over one third; and tests show that the flame retardant rating reaches UL94@3.0 to 1.0mmV-0, impact intensity is kept above 15kJ / m<2>, a melt index exceeds 20g / 10min, weather resistance is excellent, other various mechanical performances are balanced, a preparation method is simple and easy to operate, and the high-impact high-weather-resistance environmental-friendly brominated flame-retardant ASA material is easy to process and is suitable to popularize and apply in the fields of outdoor electronics and the like which require high impact and high weather resistance.

Description

technical field [0001] The invention belongs to the field of macromolecule materials, and in particular relates to a flame-retardant ASA material, in particular to a high-impact, high-weather-resistance, 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...

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