Low-gloss polycarbonate styreneresin composite and preparation method thereof

Abstract

The invention relates to a low-gloss polycarbonate styreneresin composite and a preparation method thereof. The composite comprises the following components (by weight percent): 20-85wt% of polycarbonate resin, 5-50wt% of styrene flexibilizer, 5-40wt% of styrene-acrylonitrile resin,1-10wt% of specific matting agent, and 0.1-1.5wt% of processing agent; the materials are premixed for 3-10 minutes in a high speed mixer, then premix compound is subject to melt extrusion at 230-300 DEG C by a double screw extruding machine, and cooling and pelletizing are carried out, thus obtaining the low-gloss polycarbonate (PC) / styreneresin composite. Compared with the prior art, the invention has the advantages that preparation technology is reasonable and the technical problem of degradation of performance of products as matting efficiency of polycarbonate (PC) / styreneresin composite is low is solved.

Description

technical field [0001] The invention relates to a preparation method, in particular to a low-gloss polycarbonate styrene resin composition and a preparation method. Background technique [0002] 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. [0003] The traditional technical means to solv...

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Problems solved by technology

[0004] 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

[0005] 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

[0007] 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.

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