Antioxidant for ester lubricants - is a complex alkali or rare earth metal organophosphorus cpd

Synthetic ester lubricant which is an ester of a polyol and a 4-22C carboxilic acid contains, as an anti-oxidant, a complex alkali metal or rare earth metal organophosphorous cpd. in which eh atomic ratio of said metla to P is >=0.8:1. The anti-oxidant is a salt of the metal base and a complex or...

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Bibliographic Details
Main Authors R.W. WEISS, S.L. REID, Q.E. THOMPSON
Format Patent
LanguageEnglish
French
Published 25.01.1973
Subjects
CHEMISTRY
FUELS
LUBRICANTS
LUBRICATING COMPOSITIONS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Summary:Synthetic ester lubricant which is an ester of a polyol and a 4-22C carboxilic acid contains, as an anti-oxidant, a complex alkali metal or rare earth metal organophosphorous cpd. in which eh atomic ratio of said metla to P is >=0.8:1. The anti-oxidant is a salt of the metal base and a complex organophosphorus mixed acid ester of (a) a polyol free of beta-H atoms (e.g. pentaerythritol), (b) a 4-22C acylating agent (e.g. octanoic acid) and (c) a polybasic P acid which is H3PO4, h3PO3 or a lower alkyl phosphonic acid or an ester or partial ester of one of these acids or an amide of H3PI3 or of phosphonous acid. The anti-oxidant is effective at elevated temp. without adversely affecting the corrosivity or load-bearing capacity of the lubricant.
Bibliography:Application Number: BED786694