Modified yellow pigment as well as preparation method and application thereof

The invention provides a modified yellow pigment and a preparation method and application thereof, and relates to the technical field of reflective thermal insulation paints.The modified yellow pigment provided by the invention is a yellow pigment with the surface coated with silicon dioxide, and the yellow pigment comprises at least one of pigment brown 24 and pigment yellow 53. According to the invention, the technical problem that the sunlight reflectance ratio requirement in the GB/T 25261-2018 standard cannot be met in the lightness interval (L * value is in the range of 70-85) when the common inorganic iron oxide yellow is used for toning in the existing reflective heat-insulating coating is solved, and the purposes of improving the near-infrared reflectance ratio of the reflective heat-insulating coating, improving the brightness of the reflective heat-insulating coating and improving the brightness of the reflective heat-insulating coating are achieved. Meanwhile, the technical effects of excellent ou