Abstract Lubricating compositions, particularly useful for manufacturing multigrade oils, hydraulic fluids, oils for industrial gears and cutting oils, comprising 5 - 95 percent by weight of a hydrocarbon oil produced according to a conventional process and 5-95 percent by weight of a compound selected from the group consisting of the esters of polyalkyleneglycol ethers complying with the general formula: WHEREIN R1 is a divalent hydrocarbon radical having from one to 34 carbon atoms, R2 and R''2 are divalent aliphatic radicals having from two to five carbon atoms, R3 and R''3 are monovalent hydrocarbon radicals having from one to twenty-five carbon atoms and n1 and n2 are integers from two to 50, and those complying with the general formula: WHEREIN R4 is a hydrocarbon radical of valency m, having from three to 15 carbon atoms, R5 is a monovalent hydrocarbon radical having from one to 25 carbon atoms, R2 is a divalent aliphatic radical having from two to five carbon atoms, n is an integer from two to 50 and m is an integer from two to four.
A composition according to claim 1, in which compound (B) is an ester of polypropyleneglycol ether.
Claim 2
Dependent Claim
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A composition according to claim 1, further containing from 2 to 20 percent by weight of a third solvent selected from the group consisting of: (a) esters of dicarboxylic acids and aliphatic monoalcohols, and (b) esters of monocarboxylic acids and aliphatic polyols.
Claim 3
Dependent Claim
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A composition as defined by claim 1, wherein compound (B) is selected from the group consisting of the esters resulting from the simultaneous esterification of an ether obtained by condensation of propylene oxide with trimethylol propane with a mixture, in a molar ratio of 4/1, of dodecanoic acid and azelaic acid, and the esters resulting from the simultaneous esterification of an ether obtained by condensation of propylene oxide with trimethylolpropane with a mixture, in a molar ratio of 8/1, of dodecanoic acid and isononadecanedioic acid.
Claim 4
Dependent Claim
17 words
A composition according to claim 1, wherein R4, R2, R5, and R1 are saturated aliphatic hydrocarbyl groups.
Claim 5
Dependent Claim
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A lubricating composition as defined by claim 1, wherein compound (B) is an ester of poly(ethylene-propylene) glycol ether, said glycol having a ratio of ethylene oxide:propylene oxide of not more than 1:1 respectively.