| 摘要 |
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 170C 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 |
