We are developers and producers of the new fire-retardant distending paint “OF [UNIPOL]”. Adapts due to the extreme conditions (in autumn, in winter, in spring) at a temperature minus of 25°[S] and it is below. They do not require shielding cover layer. They are let out any colors. It is independent anticorrosive protection. It possesses high hydrostability and wear resistance. We color the year round!

Metals possess high sensitivity to high temperatures and to the action of fire. They rapidly are heated and are decreased the strength properties.

The actual limit of the fire resistance of steel constructions depending on the thickness of the elements of section and effective stresses composes from 0,1 to 0,4 h, while the minimum values of the required limits of the fire resistance of the basic structures, including of metallic, they are from 0,25 and to 2,5 h depending on the degree of a fire resistance of buildings and type of constructions.

The task of fire protection of metal constructions consists before the creation beyond the surface of the elements of the constructions of the heat-insulating screens, which maintain high temperatures and direct action of fire. The presence of these screens makes it possible to slow down the heating of metal and to preserve constructions its functions with the fire during the assigned period of time.

Fire protection of metal constructions is achieved both by the traditional methods (concreting, plastering by cement- sandy solutions, the use of brickwork) and the new contemporary methods, based beyond the mechanized putting of the lightened materials and light fillers - asbestos, expanded pearlite and vermiculite, mineral fiber, the possessing high thermal insulation properties or based beyond the use plate and sheet thermal insulation materials (gypsum-pasteboard and plaster-fiber sheets, asbestos cement and [perlitofosfogelevykh] plates and other).

The contemporary methods of fire protection of metal constructions include the use: the thermal insulation plasterings, which consist besides the cement or the gypsum, the pearlitic sand or the vermiculite, the liquid glass; fire-retardant coatings from asbestos or granulated mineral fiber, liquid glass, cement and others; the distending themselves paints, which present the complex systems of organic and inorganic components. The fire-retardant action of these paints is based beyond the distention of the substituted composition at temperatures of 170-200[S]' and the formation of the porous heat-insulating layer, whose thickness composes several centimeters.

Depending on the thickness of the layer of plaster composition, lightened coating, design fire-retardant sheets and plates is ensured the limit of the fire resistance of steel constructions from 0,75 to 2,5 h. the distending themselves paints they are used for fire protection of steel constructions during 0,75-1 h. the guarantee of a limit of the fire resistance of steel constructions 0,5 h it is reached by an increase in their massiveness due to the development of the size of sections.

this article is undertaken www.e-fire.ru