Preparation And Properties Of Epoxy Fireproof Coating With Stain Resistance

In current years, as the large-scale application of the flammable structural ordecorative materials, the fearful fire emergency happened frequently to lead huge economicaland property loss. Furthermore, dust and suspended particles in the air was found excessivenearly two years. Fog and haze is getting worse which requires a better stain resistant coatingcapability.The expandable ostentatious fireproof coating possesses both decorative function andflame-retardant function. The fireproof coating presents a same appearance with commoncoating at room temperature, and can be used as decorative material. However, at hightemperature caused by burning and fire, the fireproof coating would form the char layer likefoam and sponge, and the volume could be expanded tens or even hundreds of times. Due tothe loose character and lower heat conductivity, the char layer could protect the substratematerials from fire burning, and prevent fire occurrence or overspread, so that more timecould be gotten to put out the fire. However, there are lots of disadvantages in the fireproofcoatings, such as high organic fugitive constituents, higher price, lower flame retardancy, poorwater-proof performance, and instability in storage. So it is necessary to study low-cost andhigh performance fireproof coatings.In this paper, according to the characteristics and shortcomings of coatings we madeimprovements to its formulation and process and developed a new type of epoxy coatingswhich have stain resistance and expansion fire retardant.The thermal decomposition process of the intumescent system of APP, PER, MELwere explored using thermal gravimetric and differential thermal analysis techniques. Theresults show that the decomposition temperature range of three components: APP280℃~800℃; PER200℃~300℃; MEL250℃~340℃. The thermal decomposition temperatureof the three is basically the same, which can play a better synergy to ensure intumescent fireretardant coating effect.In the intumescent system, APP, MEL, PER achieve intumescent three synergisticeffect when used in a proportion Best. Selecting the appropriate filler additives in practicalapplications, it is necessary to be able to play an enhanced role in carbonaceous layer, but also can not expansive carbonaceous layer produced inhibition. In this experiment, we determinedthe impact of the optimum amount of each component intumescent system by studyingadditives and fillers for flame retardant coatings,which the best use of APP-MEL-PER ratio is15~20%,8~10%,7~10%; Adding the right amount of nano SiO2, nano-TiO2, Brucite inintumescent fire retardant coatings can greatly increase the time and intensity of the expansionof refractory carbonaceous layer; nanomaterials when used must be appropriate,whichadding too much or too little is also difficult to achieve the desired effect.Nanomaterials can improve stain resistance coatings by affecting the density of thecoatings, improveing its hydrophilicity, reducing adhesion and inhalation of dust and otherpollutants pollution; Fluorine surfactants can reduce the surface tension of the liquid to asignificant in a very low concentration compared to other surfactants.The effect on the performance of stain resistant epoxy matrixnano-materials andfluorine surfactant was studied,. The optimal dosage were40%~45%（epoxy）,2%~4%(nano-SiO2),4%~6%(nano-TiO2),0.1%.Comprehensive testing show that the antifouling epoxy coatings not only has excellentfire retardant properties and stain resistance properties, but also has excellent water resistance,acid and alkali resistance and other physical and chemical properties of the refrigerationcycle.