HYDRAULIC LIQUID Russian patent published in 1995 - IPC

FIELD: special technical liquids. SUBSTANCE: hydraulic liquid has, wt. -% : polyhydroxyalkylene thickening agent 10-30; polyatomic alcohol 20-55; benzotriazole 0.1-1.0; salt of monocarboxylic aliphatic acid-C₇-C₁₃ or a mixture of acids and amine taken from the group containing alkyl-(C₄-C₁₀)-amine, , dialkyl-(C₂-C₅)-amine, alkanol-(C₄-C₁₀)-amine, alkylene-(C₄-C₈)-diamine, morpholine, N-alkyl-(C₁-C₂)-morpholine, mixture of amines 2-7; component containing phosphate ion 0.5-1.5; morpholine or N-methylmorpholine 0.2-1.0; froth breaker 0.001-0.1, and water - up to 100. Source of thickening agent: compound with mol. mass 3000-20000 taken from the group containing polyethylene glycol, polyhydroxyethylated glycerol, block-copolymer of ethylene and propylene oxides. Source of polyatomic alcohol: tri- or diatomic alcohol or their oligohydroxyalkylene derivatives with mol. mass = 500, or their mixture. EFFECT: enhanced quality of liquid. 3 cl, 2 tbl