Add different flame retardants to unsaturated resins to make flame-retardant unsaturated polyester resin by different methods, which can suppress the flame spread, prevent burning and fire Self-extinguishing purpose. Flame-retardant unsaturated polyester resins can be divided into two categories: one is the addition of olefinic barrier resins, that is, adding the addition of flame retardants to the unsaturated resin by physical mixing, which is currently the most widely used A type of resin, a type of reactive flame retardant resin, that is, using a reactive flame retardant as a reaction unit in the polyester polycondensation reaction process into the unsaturated polyester molecular chain, this type of flame retardant resin is often used in the performance On products with higher requirements. http://www.kebhg.com
Sometimes flame retardant materials are of equal importance to drug rescue. Flame retardant materials can avoid or reduce the occurrence of disasters. Due to the use of flame retardants in Europe in the last ten years, the number of fire fatalities has decreased by about 20%. The safety of the flame retardant material itself is also very important. In the industry, it is a slow and difficult process to regulate the type of material used.
At present, my country generally uses chlorine-containing or bromine-containing diols or dibasic acid halogen substitutes as raw materials to prepare reactive flame retardant resins. Halogen flame retardants will produce a lot of smoke when burning, accompanied by the formation of highly irritating hydrogen halide. This dense smoke and poisonous mist produced in the combustion process causes great harm to people. According to statistics, more than 80% of deaths in fire accidents are caused by this. Another disadvantage of using bromine or chlorine as a flame retardant is that when it burns, it will also produce corrosive and environmentally polluting gases, which will cause damage to the original electrical appliances. Using inorganic flame retardants such as hydrated alumina, magnesium, boron, molybdenum compounds and other flame retardant additives, although it has obvious smoke elimination effect, it can produce low smoke and low toxicity flame retardant resin, but if the amount of inorganic flame retardant filler is too large, Not only the viscosity of the resin increases, but it is not conducive to construction. At the same time, when a large amount of added flame retardant is added to the resin, it will affect the mechanical strength and electrical properties of the resin after curing and molding.
Of course, the future research direction of flame retardant resins is low smoke, low toxicity and low cost. The ideal resin is a flame-retardant resin that is smoke-free, low-toxic, low-cost, does not affect the inherent physical properties of the resin, does not need to add additional materials, and can be directly produced in the resin production plant.