High-flow EPDM material and preparation method thereof

Abstract

The invention relates to a high-flow EPDM material and a preparation method thereof. The material is prepared from the following raw materials in percentage by weight: 0 to 30 percent of polypropylene; 40 to 80 percent of EPDM; 1 to 5 percent of compatilizer; 5 to 15 percent of SEBS; 5 to 30 percent of white oil; and 0.1 to 0.5 percent of antioxidant. The preparation method comprises the following steps: weighing the raw materials in percentage by weight; putting the SEBS and the white oil in a high mixing machine for uniformly mixing, then adding other raw materials into the mixture for mixing for 2 to 5 minutes, discharging the obtained product; and putting the raw materials which are uniformly mixed in a screw machine to carry out extrusion granulation. The method and the material are characterized in that: the prepared EPDM material is granules; not only the hardness can be adjusted, but also the fluidness is obviously superior to that of the common EPDM material; and the EPDM material prepared by the method has almost the same appearance and handfeel as the commercial grade EPDM material and can be directly injected into the finished product.

Description

technical field [0001] The invention relates to a high-fluidity EPDM material and a preparation method thereof. The material is a pellet, which can be directly injected into a product, and can be used for functional parts of tools, instruments, meters and the like. Background technique [0002] Due to its poor fluidity, ordinary EPDM will have defects such as insufficient filling and a large number of shrinkage marks when it is directly injected, so it is not suitable for direct injection molding. However, the EPDM oil-extended glue on the market often exists in blocks. When using it, the glue must be cut into small particles to facilitate processing, which wastes a lot of manpower and material resources. Therefore, the preparation of EPDM pellets with good fluidity has great market value. Contents of the invention [0003] The object of the present invention is to provide a high-flow EPDM material and a preparation method thereof in order to overcome the above-mentioned ...

AI Technical Summary

Problems solved by technology

[0002] Due to its poor fluidity, the usual EPDM will have defects such as insufficient filling and a large number of shrinkage marks when it is directly injected, so it is not suitable for direct injection molding

However, the EPDM oil-extended glue on the market often exists in blocks. When using it, the glue must be cut into small particles to facilitate processing, which wastes a lot of manpower and material resources.