High-impact polystyrene blend and preparation thereof

Abstract

The invention relates to a synthetic material, in particular to a halogen-free flame retardant high impact polystyrene blend and a preparation method thereof. The high impact polystyrene blend comprises high impact polystyrene resin with the mass percent of 35-75%, an inorganic flame retardant with the mass percent of 7-45%, an intumescent flame retardant with the mass percent of 5-20%, a flame retardant synergist with the mass percent of 1-5%, a toughening agent with the mass percent of 10-20%, a coupling agent with the mass percent of 0.5-2.0%, a lubricant with the mass percent of 0.5-3.0% and an antioxidant with the mass percent of 0.2-3.0%. The halogen-free flame retardant high impact polystyrene blend is produced by high-speed premixing and extrusion prilling, and has the advantages of environmental protection, flame retardation, low smoke, weather resistance, good thermal stability and mechanical property, easy machine shaping, etc.

Description

technical field [0001] The invention relates to a synthetic material, in particular to a halogen-free flame-retardant high-impact polystyrene blend and a preparation method thereof. Background technique [0002] High-impact polystyrene (HIPS) is generally polystyrene grafted with a small amount of butadiene monomer. It has excellent processing performance, mechanical properties, electrical properties, and stable dimensions, and the appearance of molded products is good. The price is low, so it is widely used in household appliances, office equipment, instruments, auto parts, daily appliances and packaging materials. In recent years, international oil prices have been rising steadily, and the prices of downstream products such as resin raw materials in the petrochemical industry have generally risen, which has caused huge production pressure on household appliances, chemicals, construction and other industries. Most of the products originally produced by acrylonitrile-butadi...

AI Technical Summary

Problems solved by technology

However, HIPS is very flammable, and releases a large amount of black smoke and toxic gases during combustion, which limits its application. In order to broaden its application range, flame retardant modification must be carried out

The most commonly used flame retardants for traditional flame retardant HIPS are brominated compounds. Although such flame retardants have high flame retardant efficiency and reasonable price, they will release toxic gases when burned, polluting the environment, especially polybrominated diphenyl ethers. PBDD (polybrominated benzoxin) and PBDF (polybrominated dibenzofuran) will be released when thermal degradation or burning of these compounds. The European Union's ROHS directive has proposed to ban the use of brominated biphenyls, polybrominated diphenyl ethers, etc. flame retardant