Four promising new technology of flame retardant
(1) carbon technology
In the condensed phase produced when a polymer combustion flame retardant carbon can to achieve. In the thickness of the material surface carbon up to 1 mm, can withstand the high temperature of 743 ℃ and not fire. In coatings, pentaerythritol, poly phosphoric acid respectively according to the harmonic and melamine amine can be as a good agent, catalyst and carbide carbide foaming agent. Such as add three according to certain proportion in the paint, can made high performance of fire retardant coatings.
In addition, using easy carbonization of polymer and can't carbonization of polymer blend, also has good flame retardant effect, such as easy of carbon and high impact polystyrene blending polyphenylene ether, will greatly improve the flame retardancy due to produce carbon; Such as adding a small amount of gas fire extinguishing bromine flame retardants. It has the very high flame retardant performance. This knot carbon technology will be widely used.
(2) the smoke elimination technique
Because after adding flame retardant polymer, can increase the amount of smoke, so smoke abatement become an important research topic. Eliminate smoke agent can effectively reduce the amount of smoke and smoke density of additives, eliminate smoke agent application focuses on PVC, smoke abatement resistance was key compounds agent is the most effective suppressing smoke agent. In addition to the three key oxide and eight aluminate, on the basis of newly developed abroad smoke elimination agent key acid zinc is poisoning rate is low and excellent flame retardancy of the smoke agent. Due to aluminum, price, reason often used zinc borate, aluminum hydroxide, zinc, phosphorus and silicon compounds with a small amount of aluminum chloride compound with add after, this is the way of solving the problem of current suppressing smoke a reality.
(3) the microcapsule technology:
Microcapsule can prevent the migration of flame retardant, improve the effect of flame retardant, improve the stability, changing the dosage form, etc.
Microcapsule technology research has become the forefront of flame retardant technology research. In recent years, foreign existing microcapsule products, such as dupont, freon fluorocarbon compounds with polymer the microcapsule, and used for PVC, PP, and PVR (get together ammoniac vinegar), has particularly good effects.
By applying (4) :
Aluminum hydroxide, magnesium hydroxide, antimony oxide, such as flame retardant, require the use of new technology, new equipment make the particles, to improve its liquidity, processability, improve the effect of flame retardant, etc. Aluminum hydroxide, the average particle size requirement to 15 m for antimony oxide insist on finer particle size. With particle size 0. 015 ^ '0. 025 MB Sb2O3 colloid treated for flame retardant fiber, resistance badge effect increased 8 times, other performance has improved.