High-fluidity and high-toughness ASA material and preparation method thereof

Abstract

The invention discloses a high-fluidity and high-toughness ASA (acrylonitrile-styrene-acrylate) material, which is prepared from the following materials in parts by mass: 8-26 parts of high-rigidity resin; 32 to 48 parts of high flow resin; 20 to 32 parts of small particle size ASA powder; 8-20 parts of large particle size ASA powder; 0-2 parts of matting powder; 0.1 to 0.2 part of a main antioxidant; 0.2 to 0.3 part of an auxiliary antioxidant; 0.2 to 0.5 part of a light stabilizer; 0.2 to 0.5 part of an ultraviolet light absorber; 0.3 to 0.5 part of a lubricant; according to the scheme, through a mode of compounding two resins, the problem of compatibility is solved, the flowability is improved, the performance reduction amplitude is small, and the purpose of reducing the cost is achieved while the performance is ensured; the two ASA powder with different particle sizes are compounded for use, so that a synergistic effect can be achieved, the toughness of the material can be improved by the whole ASA, a better impact-resistant effect can be achieved under the condition that less ASA powder can be used, and the cost is reduced; the glossiness of the ASA material is improved by adopting the matting powder, so that sunlight reflection is reduced, and visual influence on drivers and passersby is avoided.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to an ASA material with high fluidity and high toughness and a preparation method thereof. Background technique [0002] As we all know, the development direction of automobiles is environmental protection, safety and beauty. Various automobile manufacturers, parts suppliers and material suppliers are constantly introducing new products, materials and processes, thus leading and promoting the development of the industry. With the improvement of weather resistance requirements for automotive exterior parts, ASA materials are gradually replacing PP materials on exterior parts such as ventilation grilles, radiator grilles, and rearview mirror housing bases. The basic structure of the ASA material is similar to that of the ABS material, but in addition to having excellent mechanical and physical properties, it also has good aging resistance, which is suitable for the explos...

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Problems solved by technology

[0003] ASA is similar to ABS in terms of processing performance and mechanical properties, but there are problems of insufficient fluidity and impact resistance; ASA materials have deviations in impact resistance, and their application in automotive exterior parts has been limited. At present, ASA has been improved. The measure of material impact resistance is mainly rubber reinforced SAN method, the mechanism is that through the increase of rubber content, SAN resin undergoes microscopic deformation, and stress concentration is formed at the interface between rubber and SAN resin, thereby absorbing energy; and the flow properties of ASA material It also deviates, and it will also be limited when injecting larger-sized exterior parts; in the prior art, it is usually possible to add a flow modifier to achieve the effect of improving the flow performance. Although the flow performance can be improved, the mechanical properties are reduced. The range is too large

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