ANTIFREEZE Russian patent published in 1998 - IPC

FIELD: systems for cooling internal combustion engines and heat exchangers. SUBSTANCE: antifreeze comprises (wt %): 1.3-1.4 87% orthophosphoric acid; 1.3-1.5 potassium or sodium hydroxide; 0.03-0.10 alkali metal salts of 2-marcaptobenzthiazole; 0.10-0.15 alkali metal carbonate; 0.08-0.07 disodium salt of ethylenediamino tetraacetic acid dihydrate; 0.02-0.03 foam suppressor; 0.002-0.003 dye; 0.8-1.5 water, and the ethylene glycol balance. EFFECT: improved cooling. 2 tbl