COMPOSITION FOR FIRE-PROTECTIVE COATING AND METHOD OF PRODUCING SAID COMPOSITION Russian patent published in 2012 - IPC C08L61/10 C09K21/00 C08K13/02 

FIELD: chemistry.

SUBSTANCE: composition contains novolac-type phenol-formaldehyde resin, urotropin, azobisisobutyronitrile gasifier, processed chrysotile asbestos, butadiene-nitrile rubber, calcium stearate or zinc stearate, dust-like ground quartz with particle size of not more than 0.25 mm which is thermally treated at (700-950)°C, antioxidant naphtham-2 or agidol-2. The method of producing the composition involves heating and plasticising the butadiene-nitrile rubber together with the antioxidant and calcium stearate or zinc stearate. The obtained mixture is then mixed with phenol-formaldehyde resin and powdered filler materials are then added to the obtained composition. Further, the obtained mixture is cooled to temperature (30-50)°C and weighed portions of urotropin and azobisisobutyronitrile are then added to said mixture. The obtained composition is deposited on the article by loading a ground portion into the confined volume of a mould, heated step-by-step to temperature 170°C and held at that temperature, resulting in solidification of the composition, thereby turning into a coating.

EFFECT: high oxidation resistance and stabilisation of process and operational properties of the semi-finished product during manufacture, storage and processing.

3 cl, 6 ex, 2 tbl