MANUAL TRANSMISSION LUBRICANT BORATE SALT-CONTAINING ADDITIVE WHICH GIVES STABLE AND HIGH SYNCHROMESH DURABILITY AGAINST HYDROLYSIS

PROBLEM TO BE SOLVED: To provide an extreme-pressure additive which improves water resistant stability, oxidation inhibition, high synchromesh durability performance and gear protection by a lubricating oil in a manual transmission gear box. SOLUTION: An extreme-pressure additive comprises (a) 30-70...

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Bibliographic Details
Main Authors TEQUI PIERRE, CAZIN JACQUES, BATELIER DOMINIQUE, LE SAUSSE CHRISTOPHE, VIGNEROT DANIEL
Format Patent
LanguageEnglish
Published 29.02.2000
Edition7
Subjects
CHEMISTRY
FUELS
INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS
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:PROBLEM TO BE SOLVED: To provide an extreme-pressure additive which improves water resistant stability, oxidation inhibition, high synchromesh durability performance and gear protection by a lubricating oil in a manual transmission gear box. SOLUTION: An extreme-pressure additive comprises (a) 30-70% alkali metal borate, preferably 40-66% potassium triborate; (b) 10-30% organic polysulfide, preferably 12-25% di-tert-butyl trisulfide; (c) 1-20% alkylsuccinate ester of a polyol, preferably 5-15% reaction product of pentaerythritol with a polyisobutenyl succinic anhydride; and (d) 0.5-20% perbasic alkyl or alkenyl salicylate sulfide, preferably 5-10% perbasic mixture of an alkyl salicylate sulfide and an alkyl phenolate sulfide. This extreme-pressure additive may further contains a fatty acid ester of a polyol, an alkyl-substituted phenyl phosphate, at least one metal deactivator and an anti-foaming agent.
Bibliography:Application Number: JP19990217629