ANTIFREEZE Russian patent published in 1995 - IPC

FIELD: chemical technology. SUBSTANCE: antifreeze has, wt.-% alkanolamine phosphate 9.5-10.5; sodium tetraborate decahydrate 1.25-1.35; 2-mercaptobenzothiazole alkaline metal salt 0.02-0.03; ethylenediaminetetraacetic acid disodium salt 0.07-0.08; monoalkylphosphoric acid salt of the formula R(OCH₂-CH₂)_N-OP-(O)(OM), where R hydrogen or C₁₆-C₁₈-alkyl; M sodium, potassium, triethanolamine; n 9-115) 0.0005-0.033; water 0.83-0.93; foamsupressor 0.02-0.03; dye 0.0015-0.0035, and ethylene glycol the rest. The source of alkanolamine phosphate in antifreeze: triethanolamine phosphate and/or β,β′-dihydroxy-N-methylethanolamine phosphate at triethanolamine phosphate content in the mixture 5.4-10.35 wt.-% EFFECT: enhanced quality of antifreeze. 2 cl, 4 tbl