Low temperature resistant transparent polypropylene compound for automobiles and preparation method of low temperature resistant transparent polypropylene compound

Abstract

The invention discloses a low temperature resistant transparent polypropylene compound for automobiles and a preparation method of the low temperature resistant transparent polypropylene compound. Thelow temperature resistant transparent polypropylene compound is characterized by comprising the following components in percentages by weight: 55-80% of homo-polypropylene, 10-35% of random copolymerization polypropylene, 3-9% of a toughener, 3-5% of polyethylene, 0.6-1% of a heat resistant agent and 0.5-1% of a nucleating agent. The homo-polypropylene, the random copolymerization polypropylene,the tougher, the polyethylene, the heat resistant agent and the nucleating agent are uniformly mixed in a high-speed mixer, and then melted and mixed by a double-screw extruder to obtain the compoundso as to expect to solve the problems that an existing product prepared from polypropylene has insufficient low temperature resistant toughness or has the risk of high temperature deformation, and furthermore, an expansion kettle belongs to products installed on the periphery of an engine, and is maintained in a high-temperature environment for a long time, and especially in high temperature seasons, the expansion kettle is prone to thermal oxygen aging, deformation and even explosion.

Description

technical field [0001] The invention relates to materials for vehicles, in particular to a low-temperature-resistant transparent polypropylene compound for vehicles and a preparation method thereof. Background technique [0002] Polypropylene is cheap and has a relatively small density. It has good mechanical properties and molding processing properties, high heat resistance, and good chemical stability. Its continuous use temperature can reach 110-120 ° C, but the cold resistance of polypropylene is poor. Low temperature impact resistance; polypropylene products are susceptible to aging under the action of light, heat and oxygen during use, and polypropylene generally has large spherulite volume and light scattering at the interface, resulting in low transparency; existing The preparation method of transparent polypropylene is complex and requires a large investment. The low-temperature toughness of the prepared polypropylene material is 3.2kJ / square meter, which cannot mee...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-temperature-resistant transparent polypropylene compound for automobiles and its preparation method, in order to solve the problem of insufficient low-temperature toughness or high-temperature deformation of existing polypropylene products, and the expansion of the kettle It is a product installed around the engine, which is exposed to a relatively high temperature environment for a long time, especially in high temperature seasons, which is prone to thermal oxygen aging, deformation and even bursting problems

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