High-fluidity environmental protection halogen-free flame-retardant HIPS composite material and its preparation method

Abstract

The invention belongs to the technical field of macromolecular compound combination and relates to a high-fluidity environmental protection halogen-free flame-retardant HIPS composite material, which is composed of the following components of: by weight, 29-50 parts of high impact polystyrene (HIPS), 15-35 parts of polyphenylene oxide (PPO), 3-12 parts of a flexibilizer, 5-20 parts of a phosphorus flame retardant, 1-7 parts of a flame-retardant synergistic agent, 0.2-1.0 part of a heat stabilizer, 0.2-0.8 part of an antioxidant and 0.5-1.2 parts of a processing aid. The invention also discloses a preparation method of the HIPS composite material. The composite material provided by the invention is a halogen-free flame retardation HIPS / PPO alloy with high fluidity and excellent mechanical properties.

Description

technical field [0001] The invention relates to a polymer compound composition containing polystyrene and polyphenylene ether, especially a halogen-free flame-retardant high-impact polystyrene (HIPS) composite material with high fluidity and a preparation method thereof. Background technique [0002] The chemical name of polyphenylene oxide (PPO) is poly-2,6-dimethyl-1,4-phenylene ether, which is an amorphous resin with a glass transition temperature as high as 220°C. It has poor melt fluidity, difficult molding, and high price. Application is limited. In 1967, General Electric Company of the United States successfully developed a modified PPO (nIP1) named Noryl through alloying with polystyrene (PS), especially high-impact polystyrene (HIPS), which has great processing performance. In order to improve, and basically retain the original characteristics of pure PPO. MPPO is modified polyphenylene ether, which has the lowest relative density among general engineering plastic...

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Problems solved by technology

Since the molding temperature of polyphenylene ether is 280-330°C, the molding temperature of modified polyphenylene ether is 260-285°C, and there are disadvantages such as high viscosity, poor melt fluidity, and difficult molding and processing. In order to improve the processing of PPO / HIPS alloy performance, it is necessary to increase the proportion of HIPS, but this will lead to a decline in its flame retardant performance, mechanical mechanics, electrical performance, etc., especially with the improvement of environmental protection standards in various countries, it is required to reduce or eliminate the use of halogenated flame retardants It has become a research hotspot in this industry to select suitable alloying materials and carry out optimal combination to obtain HIPS composite materials with excellent comprehensive properties. Products with large dimensions, thin walls or complex structures require relatively high processing temperatures, so it is difficult to promote them on a large scale. These are difficult problems that have not yet been well resolved.

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