Patent ID: 6194359
Filing Date: 2001-02-27
Classification: C10M,C10N

Abstract:
Operational fluid for a lifetime-lubricated engine, characterized in that it comprises as a basic fluid a polyalkylene glycol produced from ethylene oxide and propylene oxide to which is added an additive mixture comprisinga) 0.01-1.0 percent by weight of a reaction product of diphenyl amine and 2,4,4-trimethyl pentene;b) 0.01-1.0 percent by weight of a pentaerythritol partially or completely esterified with an alkyl-substituted p-hydroxy propionic acid;c) 0.01-1.0 percent by weight of a mono- or di-(C.sub.4 -C.sub.8) alkyl phosphoric acid (C.sub.10 -C.sub.15) alkyl amide;d) 0.01-1.0 percent by weight of triphenyl thiophosphate;e) 0.01-0.1 percent by weight of a tolutriazole amino-methylated with a straight-chain or branched alkyl group with 2-10 carbon atoms, and/orf) 0.01-0.1 percent by weight of 1H-benzotriazole.