Patent ID: 6399550
Filing Date: 2002-06-04
Classification: C10M,C10N

Abstract:
A lubricating composition consisting essentially of:(a) 20 to 90 weight percent of a polyalphaolefin; (b) 1 to 70 weight percent of isobutylene oligomer, said isobutylene having a molecular weight of about 700 to 2,500 and a viscosity higher than the polyalphaolefin; (c) 6 to 53 weight percent of lubricant additives effective in reducing the amount of high temperature decomposition of gear lubricants, said additives consisting essentially of the combination of a sulfur/phosphorus extreme pressure additive and at least one C5-18 monocarboxylic acid ester of a polyol having at least 3 alcohol functionalities; and (d) up to 1 weight percent of other lubricant additives, exclusive of viscosity index improvers.