Antipyrene for polymers
The feasibility of using polymeric materials by builders in the construction of housing has two extremely opposite opinions:
“For” is an inexpensive high -tech structural material of various applications;
“Against” is a potential risk factor for fire and strong smoke.
Both sides are right – opponents are based on facts that cannot be disagreded with. Not everything is so hopeless.
How to lower the combustibility class of polymer composites
When evaluating fire hazard, the characteristics of the materials are taken into account.
The very concept of “combustibility”, t. e. the ability of the material to ignite, maintain the combustion process and spread it further.
Smoke emission in the process of burning and impact of flame.
The most mortal factor in fires is the toxicity of combustion products and pyrolysis.
Fire resistance-the ability to maintain properties under the influence of fire, physical, mechanical and functional.
Inert fillers are introduced into the polymer matrix to improve fire resistant properties. Already these fillers can be clearly divided into 2 groups.
The temperature limit of stability
1000 O C – metals, silicates, inorganic glass, metal powders, etc.
The principle of action of antipyrene is the absorption of excessive heat with a non -combustible filler
400-500 about s
Hydoxides and salts of coal acid alkaline earth metals, ammonium phosphates, etc.
The principle of antipyrene is the absorption of heat with the simultaneous release of gas and/or vapor of water or ammonia.
Antipyrene and filler for polymers
The first class of additives is extremely low efficiency. The small fraction of antipyrene in the composition does not have the desired effect, and with a high content of additives and a sufficient anti -piren effect, the material becomes excessively fragile.
Practice has shown the greatest efficiency of using antipyrene additives of the second class. Classic sample – aluminum hydroxide . At a temperature of 180-200 ° C, with hydroxide decomposes with the release of tied water in the form of steam. The very reaction of the decay of the hydroxilia molecule also goes with the absorption of energy.
On the Russian antipyrene market, powder additives based on aluminum hydroxide supplies the TC “Functional Materials” St. Petersburg. The product line of modifying additives of production TC “FM” displaced import analogues from the domestic market due to affordable prices and transparent logistics.