High-heat-resistance high-rigidity environmentally-friendly polystyrene resin composition and preparation method thereof

Abstract

The invention discloses a high-heat-resistance high-rigidity environmentally-friendly polystyrene resin composition and a preparation method thereof. The polystyrene resin composition contains the following components in percentage by weight: 59-99 percent of polystyrene resin, 0.5-30 percent of SMA (Styrene-Maleic Anhydride) resin, 0-10 percent of stripping agent master batch and 0.01-1 percent of antioxidant, wherein the stripping agent master batch consists of a matrix and a stripping agent. The preparation method has the advantages of simple production process, reduced production cost and capabilities of effectively improving heat resistance and rigidity of polystyrene resin without reducing mechanical property thereof and meanwhile reducing smell and VOC (Volatile Organic Compound) content of the polystyrene resin; and the prepared polystyrene resin composition can be used in the fields of materials with strict requirements on heat resistance and environmental friendliness in packaging materials, daily articles, household appliances, OA (Office Automation), toys, electronic parts and components and equipment, building materials and automobile materials.

Description

[0001] technical field [0002] The invention relates to a polystyrene resin composition and a preparation method thereof. Background technique [0003] As one of the five general-purpose plastics, polystyrene resin has the advantages of excellent formability, moderate performance, electrical insulation, low moisture absorption, easy dyeing, and low price. It is widely used in packaging, electronics, automobiles, home appliances, instruments, daily necessities, Toys, construction and other industries. However, polystyrene resin has poor heat resistance and rigidity, and its heat distortion temperature (HDT) is around 80°C (ASTM D648, load 1.82MPa), which limits the use of polystyrene resin in high heat-resistant applications, such as microwave Food packaging field, hot drink packaging field and structural components of some electrical products, etc. At the same time, with the increasing size, thinner wall and lightweight development trend of electronic and electrical produ...

AI Technical Summary

Problems solved by technology

Although the stripping agent process can realize industrialized production, a large amount of stripping agent cannot be immersed in the raw material when the stripping agent is directly added to the raw material. On the one hand, it is difficult to add the screw extruder to operate. Screw extruder, due to the high temperature of the extruder, the stripping agent is easy to vaporize and overflow at the feeding port, and the effect of air lift cannot be achieved, so special injection nozzles with adjustable flow and ejection functions are required At the same time, it is necessary to add a pressurized mixing zone to improve the distribution of the stripping agent and limit the overflow of the stripping agent vapor from the target exhaust section, resulting in high cost and difficult operation of the above methods.