A lubricating oil composition for refrigerating machines contains a base oil and an additive in a form of a naphthalimide compound. A refrigerant used in a refrigerating machine in which the composition is used is unsaturated hydrofluorocarbon (unsaturated HFC) having a GWP of 1000 or less. When the present lubricating oil composition for refrigerating machines is used in refrigerating equipment such as an open-type automobile air-conditioner, an electric automobile air-conditioner, a gas heat pump, other air-conditioning equipment, a refrigerating machine, a vending machine, a showcase, a water-heating system and a refrigerating/heating system, it is possible to detect the leakage of a refrigerant with a long-lasting stability. Therefore, when an unsaturated fron refrigerant with a poor stability is used in the above-listed equipment, the present lubricating oil composition for refrigerating machines is significantly advantageous.

The present invention relates to an engine oil lubricant composition for use in internal combustion engines comprising one or more molybdenum containing compounds that deliver 1-1000 ppm molybdenum to the finished oil, one or more phosphorus containing compounds that deliver 25-650 ppm phosphorus to the finished oil, and one or more poly(meth)acrylate viscosity index improvers (VI improvers) that may or may not be functionalized, for improved fuel economy and turbocharger related deposits. In addition, the composition comprises an antioxidant system which is carefully balanced to provide improved fuel economy, comprising an aminic antioxidant, a phenolic antioxidant and an ashless dithiocarbamate. Additionally, the formulated oil may contain a dispersant poly(meth)acrylate, in addition to the PAMA VI improver, to reduce the amount of traditional succinimide dispersants.

The present invention relates to an engine oil lubricant composition for use in internal combustion engines comprising one or more molybdenum containing compounds that deliver 1-1000 ppm molybdenum to the finished oil, one or more phosphorus containing compounds that deliver 25-650 ppm phosphorus to the finished oil, and one or more poly(meth)acrylate viscosity index improvers (VI improvers) that may or may not be functionalized, for improved fuel economy and turbocharger related deposits. In addition, the composition comprises an antioxidant system which is carefully balanced to provide improved fuel economy, comprising an aminic antioxidant, a phenolic antioxidant and an ashless dithiocarbamate. Additionally, the formulated oil may contain a dispersant poly(meth)acrylate, in addition to the PAMA VI improver, to reduce the amount of traditional succinimide dispersants.

The present invention provides a lubricating oil composition comprising: (a) a major amount of a lubricating oil, (a) a diarylamine antioxidant, and (b) an amidine compound of Formula (I),

##STR00001## wherein R.sub.1 is hydrogen, an alkyl or an aromatic group containing 1-30 carbon atoms; x is from 1 to 5; Y is an optional linking alkyl group; Z is carbon or nitrogen; and R.sub.2 is hydrogen or alkyl groups containing 1-30 carbon atoms.

Also provided is a method for lubricating an engine comprising lubricating the engine with said lubricating oil composition.

A lubricating oil composition for refrigerating machines contains a base oil and an additive in a form of a naphthalimide compound. A refrigerant used in a refrigerating machine in which the composition is used is unsaturated hydrofluorocarbon (unsaturated HFC) having a GWP of 1000 or less. When the present lubricating oil composition for refrigerating machines is used in refrigerating equipment such as an open-type automobile air-conditioner, an electric automobile air-conditioner, a gas heat pump, other air-conditioning equipment, a refrigerating machine, a vending machine, a showcase, a water-heating system and a refrigerating/heating system, it is possible to detect the leakage of a refrigerant with a long-lasting stability. Therefore, when an unsaturated freon refrigerant with a poor stability is used in the above-listed equipment, the present lubricating oil composition for refrigerating machines is significantly advantageous.

A low-phosphorus lubricating composition having less than 600 ppm phosphorus, comprising at least 85 weight % of a lubricating base blend, and an additive comprising the following, as weight % of the total composition: (1) an organomolybdenum component comprising: (a) an organomolybdenum complex, and (b) a molybdenum dithiocarbamate, the organomolybdenum component being present at an amount which provides about 400-800 ppm Mo; (2) (iso-octyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), at about 0.25-1.5%; (3) a dithiocarbamate component comprising (a) methylene-bis-dialkyldithiocarbamate and (b) said molybdenum dithiocarbamate, at a total dithiocarbamate component of about 0.6-1.2%; and (4) an alkylated diphenyl amine, at about 0.5-1.5%.

A low-phosphorus lubricating composition having less than 600 ppm phosphorus, comprising at least 85 weight % of a lubricating base blend, and an additive comprising the following, as weight % of the total composition: (1) an organomolybdenum component comprising: (a) an organomolybdenum complex, and (b) a molybdenum dithiocarbamate, the organomolybdenum component being present at an amount which provides about 400-800 ppm Mo; (2) (iso-octyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), at about 0.25-1.5%; (3) a dithiocarbamate component comprising (a) methylene-bis-dialkyldithiocarbamate and (b) said molybdenum dithiocarbamate, at a total dithiocarbamate component of about 0.6-1.2%; and (4) an alkylated diphenyl amine, at about 0.5-1.5%.

Novel compounds are described, being alkylated diphenylamine derivatives of triazole, wherein the alkyl group on at least one of the phenyl groups is C8 or higher, in an amount ranging from 0.001 to 5.0% by weight of the lubricating composition. In particular, the derivatives may be

1-[di-(4-octylphenyl)aminomethyl]triazole;

1-[di-(4-nonylphenyl)aminomethyl]triazole;

1-[(4-octylphenyl)(4-butylphenyl)aminomethyl]triazole; and

1-[(4-octylphenyl)(phenyl)aminomethyl]triazole.

A lubricating composition comprising the novel derivatives is also disclosed.

An antioxidant composition which comprises: (a) methylenebis(di-n-butyldithiocarbamate); and (b) an alkylated diphenylamine derivative of triazole wherein the alkyl group on at least one of the phenyl groups is C.sub.8 or higher.

Lubricating compositions containing the antioxidant composition are also contemplated.

A fluoropolymer coating composition comprises: fluorinated homopolymer particles dispersed in water, fluorinated copolymer particles dispersed in water, non-fluorinated polymer particles dispersed in water; and at least one aziridine compound comprising at least two aziridine groups. The composition is especially useful in low friction coating for telecommunication cables.