Anti-ultraviolet polypropylene composite material, and preparation method and application thereof

Abstract

The invention discloses an anti-ultraviolet polypropylene composite material, and a preparation method and an application thereof. The anti-ultraviolet polypropylene composite material comprises, by mass, 50-70% of polypropylene, 10-30% of inorganic powder, 10-30% of a flexibilizer, 0.1-2% of an antioxidant, 0.1-2% of a light stabilizer, 0.5-10% of nucleating agent master batches, 0.1-2% of a lubricant and 0.5-5% of color master batches. The invention also discloses the preparation method of the anti-ultraviolet polypropylene composite material, and an application of the anti-ultraviolet polypropylene composite material in the production of car grills. A reactive ultraviolet absorbent and an energy transfer agent are compounded to form the light stabilizer, the self-made nucleating agent master batches are added, so after the prepared polypropylene composite material is aged for 4000 h, the gray scale of a talcum powder reinforced polypropylene system being 4 grades or more is met, andthe retention rate of the glossiness reaches 80% or more, thereby the anti-ultraviolet polypropylene composite material is far higher than the requirement being 1500-2000 h of a host factory, and canbe well applied to strong light and high temperature environments of the car grills.

Description

technical field [0001] The invention relates to an anti-ultraviolet polypropylene composite material and its preparation method and application. Background technique [0002] Due to its excellent comprehensive performance, low price and environmental protection, polypropylene (PP) is widely used in interior and exterior parts of automobiles, so PP accounts for more than 35% of the plastics used in automobiles. However, because the tertiary carbon atoms in the PP structure are more sensitive to oxidation, oxidative degradation occurs under the action of light, heat, and water, resulting in molecular chain breakage and a decrease in the average molecular weight, forming shorter molecular chains that are more prone to relative motion when heated, but The shorter molecular chains of carbonyl-containing compounds produced by degradation cannot be chemically recrystallized, which prevents them from being discharged into the crystal lattice, destroys the integrity of the new crysta...

AI Technical Summary

Problems solved by technology

Although the commonly used light stabilizers can ensure that the color difference of the talc-reinforced polypropylene system is small, the glossiness changes greatly, which cannot meet the anti-ultraviolet (UV) requirements of some automotive parts.

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