US2011059879A1PendingUtilityA1

Industrial and automotive grease and process for its manufacture

48
Individually held — no corporate assignee on recordPriority: Dec 5, 2008Filed: Dec 4, 2009Published: Mar 10, 2011
Est. expiryDec 5, 2028(~2.3 yrs left)· nominal 20-yr term from priority
Inventors:Carol A. BarnesKamilah N. SmithAlan G. BlaheyDouglas C. Maclaren
C10N 2060/02C10M 2203/1006C10N 2010/02C10M 169/06C10M 169/00C10N 2030/08C10M 2215/064C10M 2205/024C10N 2020/073C10N 2070/00C10N 2050/10C10M 2207/1276C10M 2205/04C10N 2030/26C10M 2209/086C10N 2020/02C10M 2207/1285C10N 2040/02C10N 2030/10C10N 2030/02C10M 2205/02C10M 177/00C10M 2205/026C10M 2203/1065C10N 2030/06C10M 2203/1025C10M 2203/1085
48
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Claims

Abstract

A lubricating grease composition is disclosed. In one embodiment, the lubricating grease comprises at least one Group I oil, at least one Group II oil, a hydrophilic copolymer, and a soap thickener. The thickener is dispersed into at least one Group I oil during a cooking phase and the at least one Group II oil is introduced during a finishing phase. A method for making a lubricating grease is also disclosed. The method comprises obtaining at least one Group I oil, obtaining at least one Group II oil, obtaining a hydrophilic copolymer, obtaining a soap thickener, and mixing the at least one Group I oil, the least one Group II oil, the polymer and the soap thickener to form a grease wherein the thickener is dispersed into the at least one Group I oil during a cooking phase and at least one Group II oil is introduced during a finishing phase.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A lubricating grease composition comprising:
 (a) at least one Group I oil;   (b) at least one Group II oil;   (c) a hydrophilic copolymer; and   (d) a soap thickener,   
       wherein the soap thickener is dispersed into the at least one Group I oil during a cooking phase and the at least one Group II oil is introduced during a finishing phase. 
     
     
         2 . The grease in  claim 1  where the one or more Group I oils introduced during the cooking phase includes a bright stock. 
     
     
         3 . The grease in  claim 1  where a Group V oil is introduced during the cooking phase. 
     
     
         4 . The grease in  claim 3  where the Group V oil is a naphthenic oil. 
     
     
         5 . The grease in  claim 2  where the one or more oils introduced during the cooking phase have a viscosity between 200 and 1400 cSt at 40° C. 
     
     
         6 . The grease in  claim 2  where the one or more oils introduced during the finishing phase have a viscosity between 10 and 1400 cSt at 40° C. 
     
     
         7 . The grease in  claim 6  where an ISO 68 Group I oil and an ISO 100 Group II oil are introduced during the finishing phase. 
     
     
         8 . The grease in  claim 7  where the copolymer contains at least one oxygen-containing monomer unit. 
     
     
         9 . The grease in any one of  claim 7  where the copolymer contains an acid. 
     
     
         10 . The grease in  claim 9  where the acid is a carboxylic acid. 
     
     
         11 . The grease in any one of  claim 7  where the copolymer contains an acid anhydride. 
     
     
         12 . The grease in  claim 11  where the acid anhydride is maleic anhydride. 
     
     
         13 . The grease in any one of  claim 7  where the copolymer contains an ester. 
     
     
         14 . The grease in  claim 7  where the copolymer contains a styrene. 
     
     
         15 . The grease in  claim 7  where the copolymer is styrene maleic anhydride ester. 
     
     
         16 . The grease in  claim 7  where the copolymer comprises between 2% and 6% of the overall weight of the grease. 
     
     
         17 . The grease in  claim 16  where the thickener is derived from reacting a mixture of a C 12  to C 24  hydroxy fatty acid and a C 2  to C 12  dicarboxylic acid with a lithium base. 
     
     
         18 . The grease in  claim 17  where the fatty acid is 12-hydroxy stearic acid. 
     
     
         19 . The grease in  claim 17  where the dicarboxylic acid is azelaic acid. 
     
     
         20 . The grease in  claim 17  where the base is lithium hydroxide monohydrate. 
     
     
         21 . The grease in  claim 1  wherein the grease contains an antioxidant. 
     
     
         22 . The grease in  claim 21  where the antioxidant is an amine-based antioxidant. 
     
     
         23 . The grease in  claim 21  where the antioxidant is diphenylamine. 
     
     
         24 . A method for making a lubricating grease, the method comprising:
 (a) obtaining at least one Group I oil;   (b) obtaining at least one Group II oil;   (c) obtaining a hydrophilic copolymer; and   (d) obtaining a soap thickener;   (e) mixing the at least one Group I oil, the least one Group II oil, the polymer and the soap thickener to form a grease wherein the thickener is dispersed into at the least one Group I oil during a cooking phase and the at least one Group II oil is introduced during a finishing phase.   
     
     
         25 . The method in  claim 24  where the one or more Group I oils introduced during the cooking phase includes a bright stock. 
     
     
         26 . The method in  claims 25  where a Group V oil is introduced during the cooking phase. 
     
     
         27 . The method in  claim 26  where the Group V oil is a naphthenic oil. 
     
     
         28 . The method in  claim 27  where the one or more oils introduced during the cooking phase have a viscosity between 200 and 1400 cSt at 40° C. 
     
     
         29 . The method in  claim 28  where the one or more oils introduced during the finishing phase have a viscosity between 10 and 1400 cSt at 40° C. 
     
     
         30 . The method in any one of  claim 29  where an ISO 68 Group I oil and an ISO 100 Group II oil are introduced during the finishing phase. 
     
     
         31 . The method in any one of  claim 30  where the copolymer contains at least one molecule of oxygen. 
     
     
         32 . The method in any one of  claim 30  where the copolymer contains an acid. 
     
     
         33 . The method in  claim 32  where the acid is a carboxylic acid. 
     
     
         34 . The method in any one of  claim 30  where the copolymer contains an acid anhydride. 
     
     
         35 . The method in  claim 34  where the acid anhydride is maleic anhydride. 
     
     
         36 . The method any one of  claim 30  where the copolymer contains an ester. 
     
     
         37 . The method in any one of  claim 36  where the copolymer contains styrene. 
     
     
         38 . The method in any one of  claim 30  where the copolymer is styrene maleic anhydride ester. 
     
     
         39 . The method in any one of  claim 38  where the copolymer comprises between 2% and 6% of the overall weight of the grease. 
     
     
         40 . The method in any one of  claim 39  where the thickener is derived from reacting a mixture of a C 12  to C 24  hydroxy fatty acid and a C 2  to C 12  dicarboxylic acid with a lithium base. 
     
     
         41 . The method in  claim 40  where the fatty acid is 12-hydroxy stearic acid. 
     
     
         42 . The method in  claim 40  where the dicarboxylic acid is azelaic acid. 
     
     
         43 . The method in  claim 40  where the base is lithium hydroxide monohydrate. 
     
     
         44 . The grease obtained from the method in  claim 43 . 
     
     
         45 . The grease in  claim 44  where the grease contains an antioxidant. 
     
     
         46 . The grease in  claim 45  where the antioxidant is an amine-based antioxidant. 
     
     
         47 . The grease in  claim 45  where the antioxidant is diphenylamine.

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