The invention discloses an anion
coating additive for removing
formaldehyde and purifying air, and a preparation method and application of the anion
coating additive. The anion
coating additive for removing the
formaldehyde and purifying the air is prepared from the following components in percentage by weight: 40-60% of base materials, 0.1-1% of a first dispersing agent, 0.1-1% of a first wettingagent, 20-35% of a first surfactant, 0.05-0.5% of a first defoaming agent, 0.1-1% of an anti-
settling agent, 0.05-0.5% of a first
preservative, 5-15% of a
formaldehyde removing agent, and the balanceof water, wherein the base materials are prepared from the following components in percentage by weight: 20-35% of
monazite powder, 30-45% of a compound containing
rare earth, 0.1-1% of a second dispersing agent, 0.1-1% of a second
wetting agent, 5-15% of a second surfactant, and the balance of water. The anion coating additive is scientific and reasonable in formula, zero VOC and zero formaldehyde are achieved, and heavy
metal such as lead,
cadmium,
chromium and mercury is not contained; the removal rate of finished coating containing the coating additive to the formaldehyde in surrounding air can reach 95% or above, the finished coating has a long-acting removing effect on the formaldehyde, negative
oxygen ions with
high concentration, high
vitality and
small particle size can be released continuously, and the releasing number of anions is up to 9000 / cm<3>.