Weather-resistant high-viscosity environmental-friendly fireproof coating and preparation method thereof

Abstract

The invention discloses a weather-resistant high-viscosity environmental-friendly fireproof coating and a preparation method thereof. The coating comprises the following raw materials in parts by weight: 30-50 parts of an organic silicon resin, 25-35 parts of an alkyd resin, 8-10 parts of polyvinyl alcohol, 10-16 parts of a phenolic benzene alkyl epoxy resin, 20-30 parts of an organic solvent, 7-11 parts of a compounded flame retardant, 7-13 parts of hollow glass beads, 4-6 parts of a metal compound, 3-7 parts of a glass fiber, 18-24 parts of thermal-insulating packing powder, 1-2 parts of nano titanium dioxide, 0.5-1 part of sodium pyrophosphate, 5-7 parts of white carbon black, 0.1-0.4 part of methylparaben and 4-6 parts of processing aids. The coating has excellent properties of good fireproof thermal-insulating properties, high bonding strength and good high / low-temperature circulation resistance, and is good in water resistance, acid resistance, salt corrosion resistance, not liable to dropping off, stable in thermal storage stability, non-toxic and environmental-friendly, meanwhile relatively low in preparation cost, easy in raw material obtaining, simple in preparation method, good in coating construction performance, relatively high in practical value and good in application prospect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a weather-resistant high-viscosity environment-friendly fireproof coating and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards in our country, people will choose various paints to decorate the appearance of buildings when constructing buildings. Most of the buildings are based on concrete, and there are brick walls inside the concrete. After a period of time, due to changes in the external climate, the concrete and bricks will expand with heat and contract with cold, which will cause cracks, blisters and even peeling off of the coating on the outer layer to varying degrees. When shrinking, the elastic coating will use its own elasticity to deform according to the temperature to compensate for the cracks caused by thermal expansion and contraction, which can effectively prevent the coating from cracking. [...

AI Technical Summary

Problems solved by technology

[0003] In addition, fire-resistant coatings are applied to the surface of combustible substrates, which can reduce the flammability of the surface of the coated material, retard the rapid spread of fire, or be coated on the surface of structural materials to improve the fire-resistant limit of components; fire-resistant coatings are generally made of Composed of base material, dispersion medium, flame retardant, filler, additives (plasticizer, stabilizer, waterproof agent, moisture-proof agent, etc.), its flame retardant principle is generally divided into two types: intumescent type and non-expandable type. Fire retardant coatings rely on their own high flame retardancy or non-combustibility to achieve the purpose of flame retardant and fire prevention. To achieve a good fire prevention effect, they must be coated very thickly, and a large amount of flame retardants containing halogen, nitrogen, phosphorus, etc. are added to produce a large amount of toxic gases. The intumescent fireproof coating is that the coating film is heated and expands to form a honeycomb carbonized layer, which isolates the heat of the flame and reduces or slows down the transfer to the substrate. A series of physical and chemical reactions that occur during fire prevention absorb a large amount of heat to prevent flames and delay the spread and spread of flames, and provide people with time to extinguish fires. However, intumescent fire retardant coatings contain a large amount of organic resins, which cause a decrease in the amount of smoke. Increase

There are also studies using inorganic resin as the main binder of the fire retardant coating to improve the strength of the coating, but the fire retardant coating prepared by using inorganic resin as the binder is easy to crack at high temperature, and the bonding strength is low