WASHING NON-ALCOHOL NON-FREEZING LIQUID FOR GLASS AND METHOD FOR PRODUCING Russian patent published in 2008 - IPC C11D3/43 C11D1/66 C11D3/20 

FIELD: chemistry.

SUBSTANCE: invention relates to means of cleaning glass, light devices of automobile machinery, namely, to washing non-alcohol non-freezing liquid of the following composition, in weight %: dimethylsulphoxide from 30 to 50, anion SAS 0.1-0.25, non-ionogenic SAS 0.08-0.15, trilon B 0.0008-0.0015, sodium acetate 0.01-0.1, carbomide 0.03-0.08, blue acid dye 0-0.0001, aromatiser (perfume composition) 0-0.0003, de-ionised water to 100%. Invention also relates to the method for obtaining the said washing liquid. Process includes preparation of highly concentrated solution of dimethylsulphoxide in de-ionised water by mixing 70% of dimethylsulphoxide with 30% of water, with further introduction into the obtained highly concentrated solution of the remaining components of washing liquid with constant mixing, and, fur ther on, of calculated amount of de-ionised water, basing on the temperature necessary for beginning of crystallisation.

EFFECT: production of glass-washing liquid, which has pH level close to neutral (6.5-7.5), possesses good washing and anti-icing properties, does not cause corrosion of metal, rubber and paint coating of automobile; possibility to use the said washing liquid in a wide range of temperatures from -15°C to -50°C.

3 cl, 4 tbl, 2 ex, 1 dwg