Highly weather-proof environment-friendly high-molecular weight bromine flame-retardant ASA material and preparation method and application thereof

Abstract

The invention discloses a highly weather-proof environment-friendly high-molecular weight bromine flame-retardant ASA 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 high-molecular weight brome flame retardant, 5-20 parts of chlorinated polyethylene and 2-6 parts of novel environment-friendly flame-retardant synergist. A preparation method comprises the following steps of: sequentially adding the components into a high-speed mixer according to the proportion and mixing uniformly; adding the mixture into a twin-screw extruder; and performing mixing, extrusion, drawing, water cooling and granulation to obtain the highly weather-proof environment-friendly high-molecular weight bromine flame-retardant ASA material. According to the highly weather-proof environment-friendly high-molecular weight bromine flame-retardant ASA material disclosed by the invention, the addition amount of the flame retardant is over 1 / 3 less than the dosage of other existing flame-retardant systems; through tests, the flame-retardant grade reaches UL94@1.0-3.0mmV-0, the impact strength is kept over 10kJ / m<2>, the weather-proof property is excellent, and other mechanical properties are balanced; and the preparation method is simple and easy to implement, and the material is easy to process; and therefore, the material and the preparation method of the method are suitable for popularization and application on the market.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a flame-retardant ASA material, in particular to a high-weather-resistant, environment-friendly, high-molecular-weight 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