MARINE DIESEL CYLINDER LUBRICANT OIL COMPOSITIONS
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United States of America Patent
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Issued Date -
May 12, 2016
app pub date -
Nov 6, 2015
filing date -
Nov 6, 2014
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Disclosed herein are marine diesel cylinder lubricating oil compositions comprising (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a total base number (TBN) greater than 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof, wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of tetrapropenyl phenol (TPP) and its unsulfurized metal salt.
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