FIELD: chemistry.
SUBSTANCE: in the method, liquid epoxy diane resin (A) is mixed with aromatic polyisocyanate (B) at 80-120°C for 15-55 minutes in ratio A:B ranging from 80:20 to 96:4 and subsequently held for a day for conversion to solid fusible epoxy urethane which contains free epoxy groups. The obtained epoxy urethane is mixed on rollers at temperature 30-70°C for 10-30 minutes with antifriction powder, propylene glycol, latent hardener for epoxy urethane and propylene glycol - 4,4'diphenylmethane diisocyanate blocked by dimethylamine, chopped fibres, after which it is cut into a sheet, rolled into a rod and kept for 3 days in storage conditions.
EFFECT: increased strength of the formed element which is capable of melting on protected surfaces with simultaneous solidification and conversion to stronger epoxy urethane polymer material with high adhesion to metal surfaces, with high wear resistance.
2 tbl, 7 ex
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| METHOD OF ROLLING STOCK BRAKE PADS PRODUCTION | 2010 |
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