High-weatherability white ASA resin applied to extrusion molding and preparation method thereof

The invention relates to high-weatherability white ASA resin applied to extrusion molding and a preparation method thereof. The ASA resin comprises the following compositions in parts by weight: 100 parts of ASA resin, 10-50 parts of a heat-conduction filling material, 0.5-5 parts of infrared-reflection titanium dioxide, 0.2-1.0 part of a light stabilizer and 0.5-2.0 parts of other auxiliary agents. By employing the infrared-reflection titanium dioxide, the visible-light energy and the infrared energy of sunlight are substantially reduced, and because the synergic contribution of heat release of the heat-conduction filling material, the surface temperature of the white ASA resin product is relatively substantially reduced. The preparation method helps to extremely substantially improving the long-term weatherability of the white ASA resin, and there is an extremely large gap between the improving effect and expected improving effect. The white ASA resin is simple in production method and excellent in long-ter