FIELD: fire extinguishing.
SUBSTANCE: group of inventions relates to modern innovative means of preventing and extinguishing fires at various industrial and national economic facilities. The thermoactivated microencapsulated extinguishing agent contains microcapsules with a fire extinguishing agent core located inside a shell made of cured spatially crosslinked polymer material. The microcapsule is equipped with a protective-activating layer-shell with the following ratio of components, wt. %: core of extinguishing agent - 50-90, reinforcing shell made of hardened spatially cross-linked polymer material - 5-35, protective-activating layer-shell - 5-15. Microcapsules are capable of explosive destruction in the temperature range 120-350°C, and the outer diameter of the microcapsule is selected from the range from 50 to 1000 microns. The method for producing the agent is based on the volumetric spraying of a protective-activating layer-shell on the convection flow of reinforced microcapsules. A reinforcing shell is slurried. A heated low-viscosity film former and a hardener under a pressure of 1.8-2.2 atm are simultaneously fed into the mixed manifold in a volume of at least 40-50% of the flow of the low-viscosity film former. Drops of a cooled fire extinguishing agent are pulsed into the resulting suspension of the reinforcing shell under pressure. The choice of the diameter of the microcapsule core is regulated in the range of 50-1000 mcm. Ionized cooled bidiscillate is fed into the collector, upon contact with which a solvent is displaced from the structure of the suspension of the reinforcing shell, forming a film into which, under the action of a coherent pressure of 2.0-2.5 atm, drops of a fire extinguishing agent are imprinted. Free levitation of reinforced microcapsules of a given diameter is formed. Reinforced microcapsules in the flow of ionized bidiscillate spray and create an ascending flow of 10-30 m / s of vapors of the solution of the protective-activating layer and solvent, in which vapors of the solution of the protective-activating layer, upon contact with the suspension of ionized bidiscillate, displace the solvent, and the formed film-forming concentrate drops of size 1 -3 microns are deposited on the surface of the reinforced microcapsules and cover them with a uniform layer. Residual heat from reinforced microcapsules displaces part of the remaining solvent from the film former, forming a microcapsule shell. The formed microcapsules, which have gained the mass of the protective-activating layer due to the force of gravity, are deposited in the receiving tank and immersed in the homogeneous medium of the ionized bidiscillate, displacing the solvent residues from the formed shell, and then finally cured. The resulting microcapsules are filtered and dried for at least 24 hours in a drying chamber at a temperature of 30-50°C. The fire-extinguishing product is made in the form of a plate consisting of a substrate with an adhesive layer, a polymer matrix and a thermally activated microencapsulated extinguishing agent, or in the form of a cord, the braid of which contains a reinforcing cord, a polymer binder and a thermally activated microencapsulated fire extinguishing agent, or in the form of a cape, consisting of a heat-resistant material, elastic polymer matrix and thermoactivated microencapsulated extinguishing agent.
EFFECT: highly effective process of extinguishing fires in various volumes is provided due to a one-time impulse release in the protected volume of an excess amount of a combined fire extinguishing agent consisting of a fire extinguishing agent and aerosol released as a result of thermal decomposition of the shell of microcapsules that activate each other by a thermal pulse.
15 cl, 8 dwg, 5 tbl
