Ultra-low temperature toughened polypropylene composition

Abstract

The invention discloses an ultra-low temperature toughened polypropylene composition. The ultra-low temperature toughened polypropylene composition comprises the following components: 40-80% of polypropylene, 15-30% of a toughening agent and 5-30% of a filling reinforcing agent. According to the invention, elastic bodies with low density, low melt index and low glass transition temperature are selected and used to be in crosslinking with dicumyl peroxide (DCP) to obtain XPOE used as the toughening agent. The prepared polypropylene composition has good low temperature impact toughness, particularly, the multi-shaft low temperature impact strength, and also has good rigidity. An automobile upholstery prepared by using the ultra-low temperature toughened polypropylene composition can meet the automobile industrial safety and appearance use requirements, and can pass an ultra-low temperature (-40 DEG C) multi-shaft impact test.

Description

technical field [0001] The invention relates to a polypropylene composition, in particular to an ultra-low temperature tough polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene PP is a general-purpose plastic with a wide range of uses. It is polymerized from propylene monomer. Its melting point is 165~175°C and it is a semi-crystalline plastic. Polypropylene plastic has the characteristics of light weight and easy processing, and has become the largest and fastest-growing variety of automotive plastics. However, polypropylene material has poor low temperature resistance and low rigidity, which cannot meet the requirements and standards of automotive interior parts. Interior parts include instrument panel, auxiliary instrument panel, A, B and C pillars, glove box, door panel, rear tail box panel, etc. [0003] In order to improve the low-temperature toughness and rigidity of polypropylene, the usual method is to add elast...

AI Technical Summary

Problems solved by technology

[0004] However, the polypropylene composite materials disclosed in the above documents still have the defect that the comprehensive properties of low temperature impact toughness and rigidity are not good enough.

Moreover, these technologies use the notched impact strength of cantilever beam or simply supported beam to evaluate the low temperature impact performance, and do not evaluate the multiaxial low temperature impact strength of the material, although the notched impact strength can evaluate the low temperature impact performance to some extent, However, it cannot meet the evaluation of the safety performance of automobiles.

Images