Introduction: What kind of coating is really fireproof? What is the fire protection mechanism of fireproof coating? Let's take a look at the fire protection mechanism of the most common intumescent fire-retardant coatings and non-intumescent fire-retardant coatings today.

Intumescent fire retardant coating: When the flame retardant coating is exposed to flame, the foaming component in the coating film is thermally decomposed to form a heat-insulating spongy foam layer, which prevents flame propagation. The fire-retardant additives in paints are mainly composed of foaming ingredients, including carbon source, foaming agent and organic nitrogen compounds. They can be used together to make the fireproof effect better.

Non-intumescent fire-retardant coatings: Non-intumescent fire-retardant coatings must contain flame-retardant (fire-retardant) components, such as phosphorus-containing, halogen-containing organics (such as decabromodiphenyl ether), sodium borate, and antimony trioxide. In order to obtain excellent fire-retardant performance, in addition to flame retardants, non-intumescent fire-retardant coatings should also be selected with suitable binders. Since halogens (generally chlorine and bromine) and phosphorus are effective in improving fire resistance, it is best to use binders containing these elements. For example, we can use vinyl chloride or vinylidene chloride copolymer emulsion or chlorinated rubber latex as base material. In addition, we can use tricresyl phosphate and β-trichloroethylene phosphate as flame retardant plasticizers.