Preparation of dynamically vulcanized thermoplastic elastomer material

Abstract

The invention relates to a method for preparing a dynamically vulcanized thermoplastic elastomer material, which is characterized in that the dynamically vulcanized thermoplastic elastomer material is made of the following row materials by the percentage in weight: 20 per cent -30 per cent of polypropylenes, 60 per cent -70 per cent of nitrile rubbers, 0.1 per cent -0.5 per cent of curing agents, 0.5 per cent -1 per cent of vulcanization auxiliaries, 0.1 per cent -1 per cent of antioxidants, 0.1 per cent -1 per cent of lubricant and 5 per cent -15 per cent of compatibilizers. The preparation method comprises the following steps: the raw materials are scaled and taken according to a weight proportion; all the materials are put into a high mixing machine to be mixed for 2-5 minutes; the materials are taken out; the mixed materials are put into a screw compressor for extruding granulations. The rotating speed of the screw compressor is 180-600r/m and temperature is 150-180 DEG C. The invention has the advantages that the polypropylene/nitrile rubber dynamically vulcanized thermoplastic elastomer material by adopting the novel compatibilizer cooperated with the advanced formulation design and equipment combination, can be used on the occasion where the oil resistance is required and is used for partially replacing the nitrile rubber.

Description

technical field [0001] The invention relates to a preparation method of a dynamically vulcanized thermoplastic elastomer material, which can be used in oil-resistant occasions to partially replace nitrile rubber, and belongs to the technical field of chemical materials. Background technique [0002] Polypropylene has excellent heat resistance, corrosion resistance, electrical insulation and mechanical properties, as well as outstanding rigidity and folding resistance, so its industrial application is becoming more and more important. However, polypropylene has a large molding shrinkage rate, low-temperature brittleness, insufficient wear resistance, low heat distortion temperature, poor light resistance, and difficult dyeing. Nitrile rubber has excellent oil resistance, heat resistance, aging resistance and wear resistance and excellent electrical conductivity. By blending the two, the resulting blend will not only have the excellent processability and mechanical properties...

AI Technical Summary

Problems solved by technology

However, nitrile rubber is a typical polar rubber, and polypropylene is a typical non-polar plastic. Their compatibility is very poor, and the materials obtained by direct blending have no practical value.