US2013333654A1PendingUtilityA1

Lubricating composition

42
Assignee: WEDLOCK DAVIDPriority: Dec 17, 2010Filed: Dec 15, 2011Published: Dec 19, 2013
Est. expiryDec 17, 2030(~4.4 yrs left)· nominal 20-yr term from priority
Inventors:David John Wedlock
C10N 2030/43C10N 2020/02C10N 2030/02C10N 2030/04C10N 2040/252C10M 2203/1065C10N 2030/52C10M 105/04C10N 2020/065C10M 111/02
42
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Claims

Abstract

A lubricating composition comprising a base oil blend and one or more additives wherein the base oil blend comprises: a distillate naphthenic base oil having a saturates content as measured by IP368 of greater than 92 wt % and comprising less than 10 ppm of sulphur; and a Fischer-Tropsch derived base oil. The lubricating composition of the present invention exhibits improved detergency and engine cleanliness properties.

Claims

exact text as granted — not AI-modified
1 . A lubricating composition comprising a base oil blend and one or more additives wherein the base oil blend comprises:
 a distillate naphthenic base oil having a saturates content as measured by IP368 of greater than 92wt % and comprising less than 10 ppm of sulphur; and   a Fischer-Tropsch derived base oil.   
     
     
         2 . A lubricating composition according to  claim 1  wherein the weight ratio of the distillate naphthenic base oil to the Fischer-Tropsch derived base oil is in the range of from 10:90 to 50:50. 
     
     
         3 . A lubricating composition according to  claim 1  wherein the weight ratio of the distillate naphthenic base oil to the Fischer-Tropsch derived base oil is in the range of from 10:90 to 40:60. 
     
     
         4 . A lubricating composition according to  claim 1  wherein the weight ratio of the distillate naphthenic base oil to the Fischer-Tropsch derived base oil is in the range of from 10:90 to 30:70. 
     
     
         5 . A lubricating composition according to  claim 1  wherein the base oil blend has a pour point of less than -24° C. (according to ASTM D 5950). 
     
     
         6 . A lubricating composition according to  claim 1  wherein the base oil blend has a Viscosity Index (according to ASTM D 2270) of greater than 95. 
     
     
         7 . A lubricating composition according to  claim 1  wherein the base oil blend has a kinematic viscosity at 100° C. in the range of from 2.5 mm 2 /s to 35 mm 2 /s (according to ASTM D445). 
     
     
         8 . A lubricating composition according to  claim 1  wherein the Fischer-Tropsch derived base oil has a kinematic viscosity at 100° C. in the range of from 2.5 mm 2 /s to 14 mm 2 /s (according to ASTM D445). 
     
     
         9 . A lubricating composition according to  claim 1  wherein the lubricating composition has a value of greater than 7 merits in the Komatsu Hot Tube Test carried out at 280° C. 
     
     
         10 . A lubricating composition according to  claim 1  wherein the lubricating composition is an SAE 15W-XX grade lubricating composition according to SAE J-300 wherein XX is selected from 20, 30, 40 and 50. 
     
     
         11 . A lubricating composition according to  claim 10  wherein the lubricating composition is an SAE 15W-40 grade lubricating composition according to SAE J-300. 
     
     
         12 . A lubricating composition according to  claim 1  wherein the lubricating composition is an SAE 10W-YY grade lubricating composition according to SAE J-300 wherein YY is selected from 30 and 40. 
     
     
         13 . (canceled) 
     
     
         14 . (canceled) 
     
     
         15 . (canceled) 
     
     
         16 . A method comprising lubricating an engine with a lubricating composition that comprises a base oil blend and one or more additives, wherein the base oil blend comprises:
 a distillate naphthenic base oil having a saturates content as measured by IP368 of greater than 92wt % and comprising less than 10 ppm of sulphur; and   a Fischer-Tropsch derived base oil.   
     
     
         17 . A method according to  claim 16  wherein the engine is a heavy duty diesel engine. 
     
     
         18 . A method according to  claim 16  wherein the engine is a passenger car engine. 
     
     
         19 . A method according to  claim 16  wherein the weight ratio of the distillate naphthenic base oil to the Fischer-Tropsch derived base oil is in the range of from 10:90 to 50:50. 
     
     
         20 . A method according to  claim 16  wherein the weight ratio of the distillate naphthenic base oil to the Fischer-Tropsch derived base oil is in the range of from 10:90 to 40:60. 
     
     
         21 . A method according to  claim 16  wherein the weight ratio of the distillate naphthenic base oil to the Fischer-Tropsch derived base oil is in the range of from 10:90 to 30:70. 
     
     
         22 . A method according to  claim 16  wherein the base oil blend has a pour point of less than −24° C. (according to ASTM D 5950). 
     
     
         23 . A method according to  claim 16  wherein the base oil blend has a Viscosity Index (according to ASTM D 2270) of greater than 95.

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