FIREPROOF HYDRAULIC LIQUID Russian patent published in 1996 - IPC

FIELD: production of fireproof hydraulic liquid. SUBSTANCE: proposed liquid includes mixture of ester of phosphoric acid having common formula 4-tert (4-трет.C₄H₉C₆H₄O)_x•(C₆H₅O)_3-xP = O where x=1 or 2. Said mixture contains (mass %): (4-tert-butyl phenyl)diphenyl phosphate 70-95, di(4-tert-butyl phenyl)phenyl phosphate 4.5-25.5, triphenyl phosphate 0.5. Composition of proposed liquid (mass %) is as follows: mixture of esters of phosphoric acid 99.7950-99.9495, 2,6-di-tert-butyl-4-methyl phenol 0.05-0.2, polymethyl siloxane 0.0005-0.005. EFFECT: improves quality of desired product. 3 tbl