A production system for medium-impact polystyrene resin

Abstract

The invention discloses a medium-anti-impact polystyrene resin production system, which comprises a system collosol tank, a mixed feeding tank, a two-stage prepolymerization reactor, a multistage polymerization reactor, a two-stage devolatilization device and a pelleting machine in sequential and series connection, wherein a superfine powder material preparation tank and a superfine powder feedingtank are connected in series and are then connected with an inlet of a first-stage polymerization reactor of the multistage polymerization reactor; a prepolymerization preheater is arranged on a pipeline between the mixed feeding tank and the first-stage polymerization reactor; a devolatilization preheater is arranged on a pipeline between the last-stage polymerization reactor of the multistage polymerization reactor and a first-stage devolatilization device; the upper parts of the end parts of the first-stage and second-stage devolatilization devices are connected in series and are then connected with a cycle condenser through a conveying pipeline; a connecting tank is connected with the bottom of the cycle condenser; a bottom outlet of the collecting tank is connected with an inlet of the prepolymerization preheater. A multistage prepolymerization-multistage polymerization-multistage devolatilization combination system is used; the requirements of users on medium-anti-impact products can be met; the large-scale production is easy.

Description

technical field [0001] The invention belongs to the technical field of resin synthesis. More specifically, it relates to a medium-impact polystyrene resin production system. Background technique [0002] Polystyrene (PS) has the advantages of excellent formability, good transparency, high rigidity, good electrical insulation performance, easy dyeing, low hygroscopicity and low price. It is widely used in packaging, electronics, construction, automobiles, home appliances, instruments, daily necessities and toys. It has been widely used in other industries and has become one of the fastest-growing varieties of general-purpose synthetic resins. Polystyrene can be mainly divided into transparent polystyrene (GPPS, commonly known as transparent benzene) and high impact polystyrene (HIPS, commonly known as modified benzene). Among them, GPPS is polymerized from styrene monomer, and its appearance is colorless or light blue transparent particles. It is used in daily necessities, ...

AI Technical Summary

Problems solved by technology

[0003] Since different plastic products have different requirements for product strength, for example, general toys and stationery products do not need too high high impact strength, and there are no medium impact products on the market at present, so it is usually used in high impact strength. The method of blending transparent polystyrene into polystyrene resin reduces product strength and reduces certain costs, but this method has disadvantages such as increased labor, poor secondary blending effect, and inability to maximize the toughening effect of rubber.

Generally, in the production process of HIPS, the smaller the rubber particles dispersed in polystyrene, the better the transparency, but the poorer the impact strength, however, the larger the rubber particles dispersed in polystyrene, the better the impact strength. The better, but the less transparent

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