1. Composition of flame retardant coatings
Flame retardant paint is a special kind of paint whose composition is different from ordinary paint. Its main ingredients include film-forming agents, pigments, solvents, and flame retardants.
First of all, film-forming agents are one of the main components of flame retardant coatings. It can bind other ingredients in the coating together to form a tough film to protect the surface of the coating. The choice of film-forming agent depends on the type and application of the desired coating, such as acrylic resin, polyurethane resin, epoxy resin, etc.
Secondly, pigment is an indispensable component of flame retardant coatings, which can give the coating various colors and appearance effects. Commonly used pigments include inorganic pigments, organic pigments, and metallic pigments.
In addition, solvent is also one of the important components of flame retardant coatings. It can dissolve and dilute other ingredients in the coating, making it easy to apply and penetrate. Commonly used solvents include alcohols, ketones, esters, etc.
Finally, flame retardant is one of the most critical ingredients in flame retardant coatings. It can inhibit the burning of combustible materials, thereby improving the flame-retardant performance of the coating. Commonly used flame retardants include halogen flame retardants, phosphorus flame retardants, etc.
2. The film-forming agents of flame retardant coatings mainly include the following types:
1. Acrylic resin: It has good weather resistance and heat resistance, and can improve the flame retardant performance of the coating.
2. Polyurethane resin: It has good elasticity and impact resistance, and can enhance the protective effect of coatings.
3. Epoxy resin: It has good corrosion resistance and heat resistance, and can improve the flame retardant performance and protective effect of the coating.
4. Polysiloxane resin: It has good heat resistance and oxygen resistance, and can enhance the flame retardant performance and protective effect of the coating.
5. Polyester resin: It has good weather resistance and heat resistance, and can improve the flame retardant performance and protective effect of the coating.
In addition, there are some mixed film-forming agents, such as acrylic polyurethane resin, epoxy polyurethane resin, etc., which have better comprehensive properties and can meet the needs of different fields.
3. What types of flame retardants are suitable?
Flame retardants suitable for use in flame retardant coatings include halogen flame retardants, phosphorus flame retardants, and nitrogen flame retardants.
Halogen flame retardants mainly include chlorine- and bromine-containing flame retardants and derivatives, such as decabromodiphenyl ether, chlorinated paraffin, brominated polystyrene, tetrabromobisphenol A, tetrabromoether, hexabromocyclic Dodecane, octabromoether, etc. The advantages of this flame retardant are stable performance, low price, and easy processing.
Phosphorus flame retardants mainly include ammonium polyphosphate, phosphate ester flame retardants, organic phosphates, polymer phosphate esters, and other flame retardants. They can produce a relatively stable carbon layer during the combustion process and then block the transfer of heat. Play the role of flame retardant.
Nitrogen-based flame retardants mainly include melamine, melamine urate, melamine salt, and other substances. They are flame retardants with a gas-phase flame retardant mechanism. Flame retardant gases such as NO and NO2 are released during the reaction process, which can dilute the oxygen concentration and achieve retardant properties. burning function.
In addition, silicate flame retardants and phosphorus-nitrogen composite flame retardants are also suitable for use in flame retardant coatings. These flame retardants can form a dense barrier layer in the coating, effectively preventing combustion and heat transfer, thereby improving the flame retardant performance of the coating.
