PP composite material of low VOC interior trim parts for automobiles and preparation method thereof

Abstract

The invention relates to the field of automobiles, and belongs to a PP composite material special for low VOC (volatile organic compounds) high performance automobile interior trim parts and a preparation method thereof. The special material is prepared from the following compositions by mass portion: 60 to 80 portions of polypropylene (PP), 10 to 25 portions of reinforcing filler, 10 to 15 portions of toughening agent, 0.5 to 2 portions of inorganic photocatalyst, 0.2 to 0.5 portion of antioxidant and 0.1 to 0.5 portion of light stabilizer. The prepared polypropylene composite material has TVOC less than 40 mu gC / g, the notch impact strength of a cantilever beam at 23 DEG C between 10 and 42KJ / m, bending modulus between 1,000 and 2,400 MPa, and the melt index at 230 DEG C and 2.16 Kg between 10 and 30g / 10min. The PP composite material of the low VOC interior trim parts for the automobiles has low cost, good stability and the function of self-purification of VOC, and can be widely applied to production of the automobile interior trim parts.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method for preparing a vehicle interior decoration material. Background technique [0002] With the increasingly stringent requirements for material performance in the automotive industry, environmentally friendly low-VOC materials have become one of the hot spots and directions for the development of automotive interior materials. Automotive interior parts are generally modified PP composite materials, and the main reasons for the generation of VOC are: (1) PP resin. Conventional high-flow PP resin is generally produced by organic peroxide degradation method, and the residual peroxide in the resin will react to generate organic volatiles such as alcohol and aldehyde; (2) processing aids and their compatibility with the matrix PP resin. Processing aids with poor heat resistance and poor compatibility with the matrix resin will produce VOC through precipitation and volatilization; (3...

AI Technical Summary

Problems solved by technology

[0003] At present, there is little research on low-VOC automotive materials in China, and there are only a few reports on low-odor automotive materials, such as the Chinese patent "High-performance and low-odor automotive dashboard special polypropylene and its preparation method", patent application number: 200510024840.2, report The low odor of the material is reduced by adding adsorbents such as porous molecular sieves, but the products produced in this way have problems with adsorption balance; Chinese patent "Special Materials for Low Emission Automotive Interior Parts and Its Preparation Method", patent application number: 200810023327.5 , reported that the low odor of the material can be reduced by adding an organic repellant such as isopropanol / water, but this method has compatibility and persistence problems

[0004] Therefore, how to make the material have comprehensive and durable low VOC emission, self-cleaning property and meet the high performance requirements of automotive special materials will have important practical application value, and the relevant methods have not been reported yet.