METHOD OF PREPARING HYDRAULIC FLUID Russian patent published in 2010 - IPC C09K3/00 

FIELD: chemistry.

SUBSTANCE: method involves preparation of a solution of initial components and addition of extra components to the said solution while stirring. The initial components used are glycerin, polyethylene glycol and distilled water and are stirred for 1 hour at 55°C. During addition of extra components, the following are successively added to the solution of initial components: acetates of aliphatic amines while stirring for 12 hours, benzotriazole while stirring for 12 hours, sodium benzoate while stirring for 5 hours, triethanolamine while stirring for 2 hours and proxanol while stirring for 3 hours. The extra components are added while stirring at 55°C and the following nominal ratio of components is maintained (wt %): glycerin 37.20, distilled water 32.64, polyethylene glycol 23.10, triethanolamine 4.00, sodium benzoate 1.50, benzotriazole 1.30, acetates of aliphatic amines 0.25, proxanol 0.01.

EFFECT: wider field of use, obtaining hydraulic fluid for use as actuating medium in hydraulic systems.

1 cl