ANTIFREEZE Russian patent published in 2007 - IPC C09K5/00 

FIELD: special-destination fluids.

SUBSTANCE: invention relates to coolants used for cooling automotive internal combustion engines, agricultural machines, special techniques, as well as heat carriers in heat-exchange apparatuses. Antifreeze of invention is composed of, wt %: water 30.0-70.0, borax 0.15-0.38, sodium nitrite 0.03-0.08, polymethylsiloxane 0.008-0.015, boric acid 0.15-0.38, sodium hydroxide 0.05-0.30, sodium metasilicate 0.05-0.10, anhydrous sodium carbonate 0.05-0.20, colorant 0.002-0.004, and ethylene glycol - the balance.

EFFECT: enhanced corrosion protection of structural materials (copper, brass, solder, steel, cast iron, aluminum), stabilized composition, and increased reserve of alkalinity at lower prices of constituents.

4 tbl, 6 ex