What is the role of flame retardants in powder coatings

Polyurethane flame retardant manufacturers to introduce to you about flame retardant in powder coating what role
Polyurethane flame retardant manufacturers: Flame retardant in powder coating application
Plastic polymers are generally poor in flame retardant, limited by many fields, flame retardant powder coating with flame retardant, flame retardant, heat insulation function, with the rapid development of industry, the flame-retardant requirements are more and more urgent, play the role of flame retardant substances are mainly in the periodic table of n, halogen elements, Commonly used are compounds composed of n, p, Cl, Br, Mg, Al and other elements, the most economical flame retardant products are magnesium hydroxide and other compounds, such products are called flame retardants.
Although some people misunderstood the definition of flame retardant, but that the powder will burn out after adding flame retardant, however, powder coating can burn like most polymer materials, adding flame retardant is only to delay combustion, delay combustion, combustion after automatic disappearance of the process, powder coating industry standards for such products are few, Generally, the extruder pressing material is directly burned to determine the oxygen index, with reference to GB2406-1993 for evaluation, with reference to GB14907-2002 to determine the fire resistance, oxygen index (OI) refers to the minimum oxygen concentration required for flame combustion of materials in the oxygen-nitrogen mixed airflow under specified conditions, expressed by the oxygen percentage of the volume. A high oxygen index means a material is non-flammable, a low oxygen index means a material is flammable, and an oxygen index of 27 is considered a flame retardant material.
There are also various defects in the application of flame retardants. There are few flame retardant products in the powder coating industry on the market, and the flame retardant mechanism is different. In order to achieve a higher flame retardant effect, the amount of flame retardants added is usually about 5-10%, but at the same time, it will cause certain damage to the coating film, and it will be greatly affected in the process of powder coating, for example, Commercially available bromine compounds and antimony trioxide complex composition of flame retardant additive amount of 5%, flame retardant level can reach V0 level, but the flatness of the film is very poor, in the powder coating product flame retardant test, due to the selection of different materials, its combustion products will produce black smoke and irritating odor, environmental pollution is relatively large, flame retardant product price is high, high production cost, The application in powder coating industry is very limited, and many flame retardant products fail EU toxicity tests.