For the installation of the heat of sound insulation of the walls of residential buildings, industrial premises, pipelines, polyurethane foam is applied from a pistol-sprayer with a layer of any thickness; With good adhesion to most materials, the foam is firmly glued with the surface of these elements.
Polyurethane foam, due to high heat resistance, goes well with hot bitumen.
There are examples of the device of coatings of industrial buildings from polyurethane foam and foam glass glued with hot bitumen: layers of polyurethane foam (70 mm) and foam glass (50 mm) are alternately laid on hot bitumen mastic, the first on concrete base, the second according to polyurethane foam.
The widespread use of polyurethane foam in construction is determined by the presence of a large park of portable portable machines. Portable installation weighs about 100 kg and gives up to 0.17 m3 of weights per 1 min; Mobile and self -cleaning mixing heads have been developed and used, which simplifies, accelerates and reduces the cost of work (waste reduced, downtime is eliminated).
The installations of a spraying type weighing about 45 kg, which give up to 0.085 m3 of weights per 1 min, are released and used. Such an installation consists of a dosing device, a pistol-pistol and a regulatory system. The method of spraying is filled with cavities of complex configuration, and insulating coatings of any area without the use of formwork are also quickly applied.
FF foams are hard or elastic porous material of yellowish-brown tones. Depending on the composition of the components and the temperature of operation, the properties of the foam. Process of obtaining phenolic foams
FF foam (phenolo-formaldehyde resin No. 18, deform and hardener) is a hard, somewhat fragile self-adjacent material that withstand temperatures up to 250 ° C. FOO FC-40 (phenolo-formaldehyde resin No. 18, acrylonitrile rubber, dystoport and other additives) Elastic material, well withstands vibration. FC-20-A20 foam with the addition of aluminum powder retains its strength properties even at 350-400 ° C.
FE-1 foam (phenolo-formaldehyde resin of a reserved type of VIAM-B with metal powder and catalyst) relatively light and warm material.
FS-7 foam reinforced with glass fiber, self-adjacent fragile material.
The technological process of obtaining phenolic foams consists of the preparation of the composition, its swelling and curing of the material in the form or design.
At present, installations have been developed for continuous and periodic obtaining phenolic foams.
Using these installations, you can easily and quickly fill the cavities of building structures with a pre -prepared mass. Foaming and curing foam occurs in the design itself due to gases and heat released during the chemical reaction of the components. Special pistols have been created to apply foam to horizontal and vertical surfaces.
Manufacturer: Moscow factory. Kalinina, Vladimir Chemical plant.
Phenol-based foam are the most heat-resistant materials and the most severe heater (200-300 kgm3), with an increased thermal conductivity coefficient (0.05-0.06 kcal-h-grade). As thermal insulation materials, phenolic foams are inferior to polystyrene and polyurethane, but they are much cheaper than their.
In our construction, phenolic foams begin to find use in experimental objects.