Metal roof coating and preparation method thereof

Abstract

The invention provides a metal roof coating and a preparation method thereof. The preparation method comprises the following steps of sequentially adding deionized water, a pH adjusting agent, a wetting agent, a dispersing agent, a defoaming agent, a coalescing agent, an anti-freezing agent, an anti-corrosion agent, an adhesion accelerator and a wetting accelerator into a dispersing machine and dispersing for 5 minutes at a rotating speed of 500r / min; sequentially adding titanium dioxide powder, calcined kaolin and heavy calcium carbonate and dispersing for 25 minutes at a rotating speed of 1200r / min; adding an emulsion and dispersing for 5 minutes at a rotating speed of 600r / min; adding glass microbeads and dispersing for 20 minutes at a rotating speed of 400r / min; and finally adding an inhibitor and a thickener and dispersing for 10 minutes at a rotating speed of 500r / min to obtain the metal roof coating. The metal roof coating provided by the invention can integrate three functions, namely, rust-inhibiting function, waterproof function and thermal-insulation function into a whole; and during construction, only a coating needs to be purchased to achieve three roof effects and excellent adhesion force is also achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a metal roof coating, and also relates to a preparation method of the metal roof coating. Background technique [0002] Existing metal roof coatings basically require three coatings for construction, and the construction materials for each process are different. The first: anti-rust primer; the second: waterproof middle layer; the third: heat-insulating radiation finish. The three-way construction is relatively complicated, and there are many raw materials, which is not conducive to on-site construction management. Moreover, most of the first primers are water-resistant, lack flexibility, and are prone to cracking at low temperatures. The third topcoat often has poor water resistance and stain resistance, which affects the long-term heat insulation and reflection effect. [0003] The existing three-in-one coatings of waterproof, heat insulation and antirust on the ma...

AI Technical Summary

Problems solved by technology

The three-way construction is more complicated, and there are more raw materials, which is not conducive to on-site construction management

Moreover, most of the first primer is water-resistant, lacks flexibility, and is prone to cracking at low temperatures

The third topcoat often has poor water resistance and stain resistance, which affects the long-term heat insulation and reflection effect

[0003] The existing three-in-one coatings of waterproof, heat insulation and antirust on the market can only use polymers with lower Tg values ​​(glass transition temperature) to produce coatings to ensure the flexibility of the coating film. The adhesion to the metal substrate is weak, which affects the waterproof, antirust and heat insulation effects of the product

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