Preparation method of vehicle interior decoration polypropylene composition with characteristics of low atomization value, low volatility and low odor

Abstract

The invention discloses a preparation method of a vehicle interior decoration polypropylene composition with characteristics of low atomization value, low volatility and low odor. The vehicle interior decoration polypropylene composition comprises a polypropylene resin, a polyethylene resin, a toughening agent, a reinforcing agent, a heat stabilizer, a light stabilizer and a lubricant. The preparation method comprises high-speed mixing, extrusion granulation and homogenization circulation. According to the present invention, the low-VOC resin is selected and is reasonably compatible with other auxiliary agents, the two-stage water injection rinsing extraction devolatilization is used, the addition of the molecular sieve-based adsorbent is not required, and the prepared vehicle interior decoration material has advantages of low atomization value, low volatility, low odor and good molding appearance; the produced particle material is extracted into the three-component homogenization tank, and the surface of the particles is purged with hot air, so the residual volatile organic compounds in the particles can be completely devolatilized under the heating circulation action; and the preparation method has advantages of controllable process, stable quality, simple and feasible process, mature technology, wide raw material source and low production cost, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a preparation method of a polypropylene composition for automotive interior decoration with low atomization value, low volatility and low odor. Background technique [0002] Along with the development trend of automobile lightweight, environmental protection and easy recycling of materials, modified polypropylene materials are widely used in automotive interior systems due to their easy molding, good heat resistance and high cost performance. With the continuous improvement of consumers' requirements for the air quality inside the car, in 2012, the Ministry of Environmental Protection of the People's Republic of China issued the "Guidelines for the Evaluation of Air Quality in Passenger Cars" for the national environmental protection standard, and revised this recommended standard into a mandatory standard. In 2012 All automobile OEMs have strengthened the s...

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent with the publication number CN103044771A discloses a preparation method of a polypropylene material with low volatile organic matter. By adding a water-soluble surfactant, the water-soluble surfactant generates a large number of micro-bubbles during the twin-screw high-temperature extrusion process. , Adsorb the volatile organic compounds in the polypropylene melt, and discharge the VOC substances in the micro-bubbles under the action of vacuum. This method is simple and easy, but because a large amount of steam will be generated, it is easy to form the defect of returning material at the feeding port. , affecting production capacity; patent 1727389A discloses a low-odor and low-volatility polypropylene composite material, which suppresses VOC in the melt by adding fine-pore silica gel to meet the low-odor requirement; the Chinese patent with publication number CN101691435A discloses a Low-VOC high-performance PP composite material for automotive interior parts and its preparation method. The low-VOC polypropylene composite material is produced by using specific hydrogen-adjusted polypropylene, but there is a risk of volatile matter in the material processing process

Images