Abstract:
759,284. Hydraulic fluids. NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ. Jan. 4, 1954 [Jan. 5, 1953], No. 186/54. Class 69 (2). [Also in Group III] An hydraulic fluid comprises a major proportion of an oleaginous liquid ester and minor proportions of an epoxy compound and of an aryl amine containing a plurality of amino-aryl linkages. The epoxy compounds may contain one or more epoxy groups, and may be polymers containing epoxy groups. The arylamines may be diamino diarylalkanes, thiodiarylamines, diarylamines or alkylated phenylene diamines. The oleaginous liquid ester may be an ester of an acid of phosphorus, such as phosphates, phosphonates, phosphinates, diphosphorus compounds and ethers of diphosphorus compounds; an ester of silicic acid; or an ester of a carboxylic acid, such as an ester of mono or polyhydric alcohol with a mono or polybasic acid; or an ester of a silicic, phosphorus or dicarboxylic acid with thia-alcohols or thio-alcohols. Many examples of the epoxy compound, amine and ester are listed. Viscosity index improvers, extreme pressure agents, pour point-depressants and anti-wear agents may also be added to the positions. In examples, compositions are referred to which contain (a) the reaction product of bisphenol and epichlorohydrin (M.W. 300), phenyl-α-naphthylamine, and one of tri-(2- ethyl-hexyl) phosphate, triisoctyl phosphate, bis-(2-ethylhexyl) sebacate, tetra-(2-ethylhexyl) silicate, tetra-(7-methyl 4-thiaoctyl) silicate, or dinonyl-iso octene phosphonate; (b) trioctyl phosphate, di-(N,N 1 -sec-butyl) p-phenylenediamine and poly-(allyl-2, 3-epoxypropyl ether) (M.W. 400); (c) ethylene glycol diester of capric acid, pheno-thiazine and poly-(2,3-epoxypropyl crotonate) (M.W. 350); (d) diphenyl cresyl phosphate, N 1 -N 1 -tetramethyl diaminodiphenyl methane and glycidylphenyl ether; and (e) diphenyloctyl phosphate, bis-(2,3-epoxypropyl) ether and dibenzylamine. Specification 671,408 is referred to.