Scratch-resistance French white filled polypropylene composition and its preparing method

Abstract

This invention refers to a kind of component of nick resistant talcum-powder-filling polypropylene, is characterized with strengthened toughness through latex and is composed of the following materials in amounts of weight: between 50 and 80 of polypropylene, between 5 and 35 of filler, between 5 and 25 of latex, between 0.5 and 5 of high molecular silicone elastomer, between 0.05 and 0.5 of nucleater, between 0.1 and 1.0 of stabilizer, between 0.2 and 1.5 of talcum powder surface passiation agent, between 0.05 and 1.0 of processing agent and between 0.3 and 2.0 of toner. The manufacturing method is to weigh the materials in amounts of weight, to mix polypropylene, filler, latex, high molecular silicone elastomer, nucleater, stabilizer, talcum powder surface passiation agent, processing agent and toner in homo mixer, then put them into double-screwed extruder for melting and extruding. After cooling, drying and pelleting, we can get the turnoff. The invention improves the nick resistance of polypropylene, ultraviolet radiation endurance and thermal endurance and the toughness and rigidity of the material reach good balance. It can meet the requirements of the material of automobile limbs. It can demold at a relatively high temperature, improves the moulding efficiency greatly and reduces the processing cost.

Description

technical field [0001] The invention relates to a scratch-resistant talc powder-filled polypropylene composition and a preparation method, which can be used in the fields of automobiles and home appliances, such as instrument panels, door panels, sub-dashboards, glove boxes, etc. of cars, and belong to the technical field of polypropylene. Background technique [0002] Instrument panels, door panels, etc. are relatively important components in car interiors, and their shape and surface condition are the key to the appearance of a car. In the past, the method of attaching fabric to the frame of the instrument panel was mainly used to increase the aesthetic feeling. Due to the relatively complicated processing technology and high price, it has been gradually replaced by the method of not covering the skin in recent years, but it puts forward higher requirements for the surface of the instrument panel. Among them, the more important thing is the scratch resistance performance, ...

AI Technical Summary

Problems solved by technology

[0004] The foreign patent WO02051934 mentions that a silicone graft modified polyethylene is blended with polypropylene and talcum powder. With the increase of the amount of grafted PE, the scratch resistance of the modified polypropylene has been significantly improved. It is suitable for The dosage is 5-10 parts; WO02051933 relates to a method to improve the scratch resistance of the material by substituting mica for part of the talcum powder to improve the hardness of the modified material; Japanese Patent Laid-Open No. 6-220270 is reported in Toughened Polypropylene , by adding a nucleating agent to increase the surface hardness of the material to achieve the purpose of improving the scratch resistance performance, and found that the increase in the amount of rubber is also beneficial to improve the scratch resistance performance of the material; US2002 / 0077396 proposes that the isotacticity of polypropylene is improved so that Improve the crystallinity of the material to solve the scratch resistance; U52002 / 0082328 proposed a method of dynamic crosslinking of the material to improve the scratch resistance of the material; US5585420 and US5731376 proposed a method of adding polymer siloxane to improve Scratch resistance properties of talc-filled polypropylene, but no mention of rubber toughening