COOLANT FORMULATION Russian patent published in 2021 - IPC C09K5/20 

FIELD: petrochemistry.

SUBSTANCE: invention relates to the field of petrochemistry, namely to coolants and antifreezes intended for use as heat carriers in heat exchangers and in cooling systems of internal combustion engines. An automotive coolant is proposed, including (the content is indicated in wt.%): ethylene glycol or a mixture of ethylene glycol with di -, triethylene glycol and/or glycerin 45.900-92.800; anti-foaming agent (polydimethysiloxane with a viscosity of 50 to 500 mm²/s) 0.002-0.004 and/or defoamer Laprol PD -1 0.002-0.004; pH indicator from the series of butanedioic, pentanedioic, hexanedioic, heptanedioic, octanedioic, nonanedioic, decanedioic and / or their mixture and/or monobasic organic acid from the series of pentanoic, hexanoic, heptanoic, 2-ethylhexanoic, and/or octane benzoic acid or a mixture of these acids 1.900-4.400; molybdenum-containing salts of alkali metals from the series sodium molybdate, lithium molybdate, potassium molybdate and/or ammonium molybdate or their mixture 0.025-0.050; alkali metal hydroxides from the series sodium hydroxide, lithium hydroxide, potassium hydroxide or a mixture thereof 0.71-1.420; Trilon B (ethylenediaminetetraacetic acid disodium salt) 0.001-0.002; benzotriazole and/or derivatives thereof 0.110-0.280; polycyclic amines from the series of urotropine and its derivatives 0.0-0.002; water 0.0-52.060.

EFFECT: automotive coolant has a lower corrosiveness, a large alkalinity reserve and, as a result, a longer service life.

1 cl, 2 tbl, 19 ex