Reactive extrusion matte agent, low gloss PC/ABS alloy and its preparation method

Abstract

The invention relates to a reactive extrusion matte agent, a low gloss PC/ABS alloy by using the reactive extrusion matte agent and a preparation method thereof. The low gloss PC/ABS alloy comprises the following components of: by weight, 20-80% of a polycarbonate resin, 5-50% of an ABS resin, 5-40% of a styrene-acrylonitrile resin, 1-10% of the reactive extrusion matte agent and 0.1-1.5% of a processing aid. The preparation method provided by the invention comprises the following steps of: premixing the above materials in a high-speed mixer for 3-10 minutes, allowing the premix to enter intoa double screw extruder for melting extrusion at the temperature of 230-300 DEG C, cooling, followed by granulation to obtain the low gloss PC/ABS alloy. In comparison with the prior art, the preparation method provided by the invention has advantages of reasonable technology, low cost, high efficiency of reducing gloss and stable product performance.

Description

technical field [0001] The invention relates to a PC / ABS alloy and a preparation method thereof, in particular to a reaction extrusion matting agent, [0002] Low gloss PC / ABS alloy and its preparation method. Background technique [0003] Among the various applications of the composition of polycarbonate and styrenic resin, some fields require a low-gloss surface. These application fields are mainly automobiles, decorations, electronic appliances, etc., such as automotive interior parts, and attention should be paid to the design The reflectivity of the instrument panel should not only improve the visibility of the instrument, but also reduce glare through the diffuse reflection method of the cover, and prevent the high points on the instrument panel from forming a reflected image on the inner surface of the windshield, so as not to disturb the driver Therefore, the surface of the instrument panel must be matte or matte to obtain a comfortable and safe driving feeling. ...

AI Technical Summary

Problems solved by technology

[0005] 1. Surface embossing, that is, skin texture treatment can achieve good results, but sometimes it cannot meet the required requirements, and a separate embossing link needs to be added, which increases the cost

At the same time, during subsequent use, the pattern may be removed due to wear and tear, causing the gloss to appear again

[0006] 2. Add fillers, such as titanium dioxide, silicon dioxide, silicate or aluminate and other similar inert minerals. Although it can also achieve the purpose of eliminating the surface gloss of molded products, a large amount of fillers must be added to achieve a certain degree of matteness. , which greatly reduces the physical and mechanical properties of molded products or leads to the deterioration of chemical properties, especially the great loss of material toughness

[0008] 4. Adding high-molecular polymers with reactive functional groups, such as PS-g-GMA, etc., due to poor reactivity when improving the gloss of products, requires a high amount of addition, low efficiency, and has a certain impact on mechanical properties.

[0014] However, these known technical solutions also have some shortcomings: poor gloss stability, large fluctuations in mechanical properties and high cost, which limit the application of materials

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