AUTOMOTIVE 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 45,490-91,570; 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 of a number of fluoronic dyes and/or cemactives T 0.0007-0.0013; as anticorrosive additives: dibasic organic acid from the series butanedioic, pentanedioic, hexanedioic, heptanedioic, octanedioic, nonanedioic, decanedioic, and / or a mixture thereof, and/or monobasic organic acid from the series pentanoic, hexanoic, heptanoic, 2-ethylhexanoic, octanoic and/or benzoic acid or a mixture of these acids 2.090-4.480; molybdenum-containing salts of alkali metals from the series sodium molybdate, lithium molybdate, potassium molybdate and/or ammonium molybdate or a mixture of them 0.150-0.315;alkali metal hydroxides from the series sodium hydroxide, lithium hydroxide, potassium hydroxide or a mixture of 0.960-1.930; alkali metal metasilicates from the series sodium metasilicate, potassium metasilicate 0.013-0.035; alkali metal nitrites from the series sodium nitrite, potassium nitrite and/or ammonium nitrite 0.08-0.200; trilon B (disodium salt of ethylenediaminetetraacetic acid) 0.0015-0.005 and/or OEDF 0.0015-0.005; benzotriazole and/or its derivatives 0.250-0.640; water 0.0-51.430.

EFFECT: reduced corrosion activity when using automotive coolant.

1 cl, 2 tbl