ASA (acrylonitrile-styrene-acrylate) resin with favorable appearance performance and preparation method thereof

The invention discloses an ASA (acrylonitrile-styrene-acrylate) resin with favorable appearance performance and a preparation method thereof. The ASA resin comprises the following components in parts by weight: 10-50 parts of SAN (styrene-acrylonitrile), 50-90 parts of ASA crosslinking-modified graft copolymer, 0.2-0.6 part of light stabilizer, 0.2-1 part of antioxidant and 0.2-2 parts of lubricant. The preparation method comprises the following steps: stirring and mixing the raw materials, and sending the mixture into a double screw extruder; and under the actions of delivering, shearing andmixing of the screws, melting and compounding the material, extruding, drawing, cooling, and granulating to obtain the ASA resin with favorable appearance performance. The invention solves the problems of uneven luster, high tendency to irisation and white spotting, and low coloring power in the existing injection-molding ASA resin, thus has excellent appearance performance, and greatly widens the application range of the ASA resin in the fields of building materials, automobiles, electronic and electrical engineering, outdoor supplies, sports equipment and the like.