The invention discloses
grease specially used for a heavy-load open-type gear and a preparation method. The
grease of the invention comprises the following raw materials by weight percentage: 1-2% of MDI (
diphenylmethane-4,4'-diisocyanate), 0.2-1% of octadecylamine, 0.5-2% of
cyclohexylamine, 35-50% of
base oil A, 30-45% of
base oil B, 0.5-1.0% of anti-oxidant A, 1.5-3.0% of anti-oxidant B, 0.5% of antirust agent, 0.5-1.5% of extreme pressure
antiwear additive A, 4-8% of extreme pressure
antiwear additive B, 2-5% of oiliness agent A, 0.1-0.3% of oiliness agent B, 10-15% of
adhesive compound and 4-8% of
solid lubricant. Various raw materials are stirred and mixed under certain sequence according to different temperature while preparing, the
grease of the present invention has ultra-strong extreme pressure and antiwear property, and excellent adhesiveness, anticorrosion and antirust performance, good anti-oxidizability and
water resistance performance and spray characteristic, and has good adaptability with routine seal elements. The grease has no heavy
metal lead or a volatile
solvent, and belongs to the energy saving and environment-friendly product.