Heat-resistant antirust aluminum oxide coating and preparation method thereof

The invention discloses a heat-resistant antirust aluminum oxide coating and a preparation method thereof. The coating is prepared from polyvinyl butyral (PVB), acrylic resin, superfine alpha-aluminum oxide, a defoaming agent, a flatting agent, a dispersing agent, extender pigment, tinting pigment and a solvent. The high-molecular polymer PVB with few endothermic groups and the acrylic resin are used as main film-forming substances, so that the heat-resistant effect is improved, the film-forming hardness and adhesive force of the PVB are improved while the common excellent characteristics of the PVB and the acrylic resin are achieved, and the problem that the uniformity of the acrylic resin is poor is solved; besides, superfine alpha-aluminum oxide with good dispersity and stable properties is added, so the heat resistance, corrosion resistance, strength and other properties of the coating are further improved, and through the synergistic effect of all the components, the coating has excellent heat resistance