COOLING LIQUID Russian patent published in 2002 - IPC

FIELD: chemical technology; production of cooling liquids for cooling systems of internal combustion engine of automobiles, agricultural machines, special-purpose equipment; various heat exchange apparatus working at low and moderate temperatures. SUBSTANCE: cooling liquid includes ethylene glycol, distilled water, sodium benzoate and sodium nitrite, defoamer, dye-sodium fluorescein and dibasic sodium phosphate at the following content of components, mas.%: ethylene glycol, 50.00-53.00; sodium benzoate, 4.00-6.00; dibasic sodium phosphate, 1.00-1.18; sodium nitrite, 0.10-0.13, defoamer, 0.001-0.010; sodium fluorescein, 0.005-0.010; and distilled water, the balance. EFFECT: improved parameters; enhanced efficiency of luminescence of solution; extended color range of this for comfort of operating personnel working at evening and night time; enhanced anticorrosive properties of cooling liquid. 3 tbl, 3 ex