Thermoplastic resin composition and preparation method and application thereof

Abstract

The invention discloses a thermoplastic resin composition which comprises the following components in parts by weight: 30-80 parts of polycarbonate; 5 to 50 parts of polyester; 2-25 parts of an impactmodifier; and 0.5 to 20 parts of boehmite, wherein the average particle size of the boehmite is 0.01-10 microns, and the Fe element does not exceed 100 ppm. On one hand, the Fe element content of theboehmite is controlled; the boehmite is not smooth on each surface of a cube except that the whole boehmite keeps the shape of the cube, and shows rough karst-shaped cliff morphology, and the morphology has a very excellent effect on reduction of glossiness, and on the other hand, the Fe element content is controlled, so that the boehmite is prevented from generating an obvious degradation effecton PC polyester alloy; and the particle size range is controlled, and the extinction performance of the boehmite is enhanced. Therefore, the thermoplastic resin composition provided by the inventionhas a good matte effect.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a thermoplastic resin composition, a preparation method and an application thereof. Background technique [0002] The rapid development of China's auto industry has led to the rapid growth of the automotive lightweight plastic application market. Automobile lightweight and energy saving and emission reduction have also become major issues to be solved in the future of China's auto industry. High innovation requirements. Automotive exterior trim parts featuring high strength, high toughness, excellent weather resistance and impact resistance are one of the main positions for lightweight vehicles. Automotive exterior parts include: front and rear bumpers, hoods, radiator grilles, fenders, exterior door handles, rear deflectors, and body moldings. Polyester (polyethylene terephthalate PET, polybutylene terephthalate PBT, etc.) / polycarbonate (PC) alloys, especially elasto...

AI Technical Summary

Problems solved by technology

Judging from the existing modified matting techniques, inorganic matting agents are relatively less used in alloy materials such as PC / PBT and PC / PET; non-reactive matting agents are often compatible with PC / PBT or PC / PET alloys Poor properties, after adding, a two-phase incompatible structure is formed, and most organic matting agents are also toughening agents. When the addition amount is high, it will greatly affect the mechanical properties and heat resistance of the material

For reactive matting agents, if the ideal matting effect needs to be achieved, more reactive matting agents need to be added, which may cause two-phase phase separation or a significant decrease in mechanical properties

For inorganic matting agents, most patents believe that a large amount of inorganic filler must be added to achieve the ideal matting degree. When the filler is excessive, the interface between the filler and the resin will increase, and the interface bonding strength will be low, which will easily cause the deterioration of the overall mechanical properties.

In summary, the current three modified matting technologies have certain limitations, and more advanced technologies are still needed to further reduce the gloss of polycarbonate / polyester systems

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