Preparation method for low temperature toughness isotatic polypropylene product

Abstract

The invention discloses a preparation method for a low temperature toughness isotatic polypropylene product. The preparation method comprises the following steps of (1) pre-mixing 100 parts of isotatic polypropylene resin and 5 parts of beta nucleating agent to obtain a mixture and then putting the mixture into a twin-screw extruder, and carrying out melt blending and extruding to obtain beta nucleating agent master batch; (2) pre-mixing 100 parts of isotatic polypropylene resin and 30 parts of superfine powder rubber to obtain a mixture and then putting the mixture into the twin-screw extruder, and carrying out melt blending and extruding to obtain superfine powder rubber master batch; (3) pre-mixing 100 parts of isotatic polypropylene resin, 1-5 parts of beta nucleating agent master batch, 1.7-20 parts of superfine powder rubber master batch and 0.1-0.2 part of antioxygen to obtain a mixture and then putting the mixture into the twin-screw extruder, and carrying out melt blending and extruding to obtain isotatic polypropylene modified granules; and (4) carrying out injection moulding on the isotatic polypropylene modified granules, so as to obtain the low temperature toughness isotatic polypropylene product. According to the method, the technical measures of adding both the beta nucleating agent and the superfine powder rubber are adopted, so that the properties, especially the low temperature impact toughness of the product are greatly improved.

Description

technical field

[0001] The invention relates to a method for toughening polypropylene, in particular to a method for preparing a low-temperature tough isotactic polypropylene product, and belongs to the field of polymer materials. Background technique

[0002] Polypropylene is a general-purpose polymer material widely used in automobiles, electrical appliances, and daily necessities. It has many advantages, such as its rich source of raw materials, cheap price, light weight, and good processing performance. In addition, its products have excellent comprehensive properties, such as high strength and modulus, good dielectric properties, and good wear resistance. However, the poor toughness of pure polypropylene, especially the poor low-temperature toughness, greatly limits its application, so the present invention seeks an effective method to improve the low-temperature toughness of polypropylene.

[0003] In recent decades, improving the toughness of polypropylene has been a...

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