US2007129268A1PendingUtilityA1

Lubricating oil composition

46
Individually held — no corporate assignee on recordPriority: Oct 17, 2005Filed: Oct 17, 2006Published: Jun 7, 2007
Est. expiryOct 17, 2025(expired)· nominal 20-yr term from priority
Inventors:Nicholas BellMitsuhiro NagakariPeter W. Smith
C10M 2215/065C10M 2203/1045C10M 2215/064C10N 2040/30C10M 2205/0285C10N 2030/10C10M 2203/065C10M 133/12C10M 2205/173C10M 169/04C10M 2205/223C10N 2030/04
46
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Claims

Abstract

A lubricating oil composition is provided containing one or more hydrocarbyl-substituted aromatic lubricant base oils in combination with (a) one or more phenyl-naphthylamines, and (b) one or more diphenyl amines, where said lubricating oil composition comprises one or more additional lubricant base oils comprising polyalphaolefins and/or Fischer-Tropsch derived base oils. Further, the present invention relates to the use of the lubricating oil composition for lubricating a rotary air compressor.

Claims

exact text as granted — not AI-modified
1 . A lubricating oil composition comprising one or more hydrocarbyl-substituted aromatic lubricant base oils in combination with: 
 (a) one or more phenyl-naphthylamines, and    (b) one or more diphenylamines,    wherein said lubricating oil composition comprises one or more additional lubricant base oils comprising    polyalphaolefins and/or Fischer-Tropsch derived base oils.    
   
   
       2 . The lubricating oil composition of  claim 1  wherein the one or more hydrocarbyl-substituted aromatic lubricant base oils are selected from one or more of alkylated naphthalenes, alkylated benzenes, alkylated diphenyl compounds, alkylated diphenyl methanes and mixtures thereof.  
   
   
       3 . The lubricating oil composition of  claim 1  wherein the one or more hydrocarbyl-substituted aromatic lubricant base oils are one or more alkylated naphthalenes.  
   
   
       4 . The lubricating oil composition of  claim 1  wherein the one or more phenyl-naphthylamines are phenyl-alpha-naphthylamines.  
   
   
       5 . The lubricating oil composition of  claim 2  wherein the one or more phenyl-naphthylamines are phenyl-alpha-naphthylamines.  
   
   
       6 . The lubricating oil composition of  claim 3  wherein the one or more phenyl-naphthylamines are phenyl-alpha-naphthylamines.  
   
   
       7 . The lubricating oil composition of  claim 1  wherein the one or more diphenylamines are hydrocarbyl-substituted diphenylamines.  
   
   
       8 . The lubricating oil composition of  claim 2  wherein the one or more diphenylamines are hydrocarbyl-substituted diphenylamines.  
   
   
       9 . The lubricating oil composition of  claim 4  wherein the one or more diphenylamines are hydrocarbyl-substituted diphenylamines.  
   
   
       10 . The lubricating oil composition of  claim 6  wherein the one or more diphenylamines are hydrocarbyl-substituted diphenylamines.  
   
   
       11 . The lubricating oil composition of  claim 1  wherein said lubricating oil composition further comprises one or more additives selected from one or more extreme pressure additives, one or more anti-wear additives, one or more metal passivators, one or more corrosion inhibitors, one or more foam inhibitors, one or more demulsifiers, and one or more mixtures thereof.  
   
   
       12 . The lubricating oil composition of  claim 1  wherein said lubricating oil composition comprises a total amount in the range of from 0.1 to 5.0% by weight of said one or more phenyl-naphthylamines, based on the total weight of the lubricating oil composition.  
   
   
       13 . The lubricating oil composition of  claim 3  wherein said lubricating oil composition comprises a total amount in the range of from 0.1 to 5.0% by weight of said one or more phenyl-naphthylamines, based on the total weight of the lubricating oil composition.  
   
   
       14 . The lubricating oil composition of  claim 7  wherein said lubricating oil composition comprises a total amount in the range of from 0.1 to 5.0% by weight of said one or more phenyl-naphthylamines, based on the total weight of the lubricating oil composition.  
   
   
       15 . The lubricating oil composition of  claim 1  wherein said lubricating oil composition comprises a total amount in the range of from 0.1 to 5.0% by weight of said one or more diphenylamines, based on the total weight of the lubricating oil composition.  
   
   
       16 . The lubricating oil composition of  claim 3  wherein said lubricating oil composition comprises a total amount in the range of from 0.1 to 5.0% by weight of said one or more diphenylamines, based on the total weight of the lubricating oil composition.  
   
   
       17 . The lubricating oil composition of  claim 7  wherein said lubricating oil composition comprises a total amount in the range of from 0.1 to 5.0% by weight of said one or more diphenylamines, based on the total weight of the lubricating oil composition.  
   
   
       18 . The lubricating oil composition of  claim 12  wherein said lubricating oil composition comprises a total amount in the range of from 0.1 to 5.0% by weight of said one or more diphenylamines, based on the total weight of the lubricating oil composition.  
   
   
       19 . The lubricating oil composition of  claim 1  wherein said lubricating oil composition comprises a total amount in the range of 0.1 to 30% by weight of said one or more hydrocarbyl-substituted aromatic lubricant base oils, based on the total weight of the lubricating oil composition.  
   
   
       20 . The lubricating oil composition of  claim 18  wherein said lubricating oil composition comprises a total amount in the range of 0.1 to 30% by weight of said one or more hydrocarbyl-substituted aromatic lubricant base oils, based on the total weight of the lubricating oil composition.  
   
   
       21 . The lubricating oil composition of  claim 1  wherein the one or more phenyl-naphthylamines (a) and the one or more diphenylamines (b) are present in a weight ratio in the range of from 1:3 to 3:1.  
   
   
       22 . A method of lubricating a rotary air compressor wherein a lubricating oil composition of  claim 1  is applied to at least a portion of said rotary air compressor.

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