SUPERCONCENTRATE FOR PREPARING ANTIFREEZES AND HEAT CARRIERS Russian patent published in 2003 - IPC

FIELD: special- destination fluids. SUBSTANCE: superconcentrate, which is applicable for cooling systems of internal combustion engines and as heat carriers in heat- exchange apparatuses, contains, wt.%: 75% orthophosphoric acid, 2.0-20.0; triethanolamine or 2,2',2"-nitrilotriethanolamine, 10.0-60.0; 2- mercaptobenzthiazole sodium or potassium salt (captax), 0.1-1.2; ethylenediaminetetraacetic acid disodium salt dihydrate, 0.5-1.5; caprolactam, 0.1-3.0; 1,4-dihydoxybenzene or "bisalkofon", 0.01-3.0; phosphite P-24 or phenyl-alpha-naphthylamine, 0.001-0.005; antifoaming agent, 0.02-0.03; dye, 0.05- 0.06; n-butanol, 0.2-0.3; and ethylene glycol, propylene glycol, or polyglycol, 10.0-35.0. EFFECT: increased protection power and reduced toxicity. 1 ex