US2004224859A1PendingUtilityA1

Urea grease composition

39
Priority: Dec 10, 2002Filed: Dec 4, 2003Published: Nov 11, 2004
Est. expiryDec 10, 2022(expired)· nominal 20-yr term from priority
Inventors:Kouichi NumazawaKazushige OhmuraTakahiro OzakiKeiji Tanaka
C10N 2040/046C10M 2215/1026C10M 2223/045C10M 2215/064C10M 2227/09C10M 2215/222C10M 115/08C10M 169/06C10N 2050/10C10M 2219/068
39
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Claims

Abstract

A urea grease composition is provided containing a lubricating base oil and from 2 to 30 wt. % of a thickening agent, with respect to the total weight of the urea grease composition and wherein said thickening agent is selected from: (1) a mixture of a compound (a) and a compound (b), containing compound (a) at 20 to 80 mol %, relative to the total amount of compound (a) and compound (b); (2) a mixture formed by mixing with a compound (c) with a mixture (1); or (3) a compound (c) alone, wherein the compounds are represented by the general formulae R 1 NHCONHR 2 NHCONHR 1 ;  (a) R 3 NHCONHR 2 NHCONHR 3 ; and  (b) R 1 NHCONHR 2 NHCONHR 3 ,  (c) and wherein R 2 is a diphenylmethane group, R 1 is a C6-10 saturated alkyl group and R 3 is a C14-40 saturated and/or unsaturated alkyl group wherein unsaturated alkyl groups constitute at least 20 mol % of the R 3 alkyl group.

Claims

exact text as granted — not AI-modified
I claim:  
     
         1 . A urea grease composition comprising a lubricating base oil and from 2 to 30 wt. % of a thickening agent, with respect to the total weight of the urea grease composition and wherein said thickening agent is selected from the group consisting of: 
 (1) a mixture of a compound (a) and a compound (b), containing compound (a) at 20 to 80 mol %, relative to the total amount of compound (a) and compound (b);    (2) a mixture formed by mixing with a compound (c) with a mixture (1) or    (3) a compound (c) alone,    wherein the compounds are represented by the general formulae   R 1 NHCONHR 2 NHCONHR 1 ;  (a)R 3 NHCONHR 2 NHCONHR 3 ; and  (b)R 1 NHCONHR 2 NHCONHR 3 ,  (c)   and wherein R 2  is a diphenylmethane group, R 1  is a C6-10 saturated alkyl group and R 3  is a C14-40 saturated and/or unsaturated alkyl group wherein unsaturated alkyl groups constitute at least 20 mol % of the R 3  alkyl group.    
     
     
         2 . The urea grease composition of  claim 1  wherein unsaturated alkyl groups constitute at least 30 mol % of the R 3  alkyl group.  
     
     
         3 . The urea grease composition of  claim 1  wherein an oleyl component constitutes at least 20 mol % of the R 3  alkyl group.  
     
     
         4 . The urea grease composition of  claim 2  wherein an oleyl component constitutes at least 20 mol % of the R 3  alkyl group.  
     
     
         5 . The urea grease composition of  claim 1  wherein said composition further comprises a zinc compound as an additive.  
     
     
         6 . The urea grease composition of  claim 2  wherein said composition further comprises a zinc compound as an additive.  
     
     
         7 . The urea grease composition of  claim 3  wherein said composition further comprises a zinc compound as an additive.  
     
     
         8 . The urea grease composition of  claim 5  wherein said zinc compound is selected from the group consisting of zinc dithiocarbamates and zinc dithiophosphates.  
     
     
         9 . The urea grease composition of  claim 8  wherein unsaturated alkyl groups constitute at least 30 mol % of the R 3  alkyl group.  
     
     
         10 . The urea grease composition of  claim 8  wherein an oleyl component constitutes at least 20 mol % of the R 3  alkyl group.  
     
     
         11 . The urea grease composition of  claim 1  wherein said composition further comprises a molybdenum compound as an additive.  
     
     
         12 . The urea grease composition of  claim 2  wherein said composition further comprises a molybdenum-compound as an additive.  
     
     
         13 . The urea grease composition of  claim 3  wherein said composition further comprises a molybdenum compound as an additive.  
     
     
         14 . The urea grease composition of  claim 11  wherein said molybdenum compound is selected from molybdenum dithiocarbamates, molybdenum dithiophosphates and molybdenum complexes that are reaction products of a fatty oil, diethanolamine and a molybdenum source.  
     
     
         15 . The urea grease composition of  claim 14  wherein unsaturated alkyl groups constitute at least 30 mol % of the R 3  alkyl group.  
     
     
         16 . The urea grease composition of  claim 14  wherein an oleyl component constitutes at least 20 mol % of the R 3  alkyl group.  
     
     
         17 . The urea grease composition of  claim 1  wherein the thickening agent is present in an amount of from 5 to 20 wt. %, with respect to the total weight of the urea grease composition.  
     
     
         18 . The urea grease composition of  claim 17  wherein unsaturated alkyl groups constitute at least 30 mol % of the R 3  alkyl group.  
     
     
         19 . The urea grease composition of  claim 17  wherein said composition further comprises a zinc compound as an additive.  
     
     
         20 . The urea grease composition of  claim 17  wherein said composition further comprises a molybdenum compound as an additive.  
     
     
         21 . A method of lubricating a bearing, comprising packing the bearing with the urea grease composition of  claim 1 .  
     
     
         22 . A method of lubricating a bearing, comprising packing the bearing with the urea grease composition of  claim 2 .  
     
     
         23 . A method of lubricating a bearing, comprising packing the bearing with the urea grease composition of  claim 3 .  
     
     
         24 . A method of lubricating a bearing, comprising packing the bearing with the urea grease composition of  claim 5 .  
     
     
         25 . A method of lubricating a bearing, comprising packing the bearing with the urea grease composition of  claim 8 .  
     
     
         26 . A method of lubricating a bearing, comprising packing the bearing with the urea grease composition of  claim 11 .  
     
     
         27 . A method of lubricating a bearing, comprising packing the bearing with the urea grease composition of  claim 14 .  
     
     
         28 . A method of lubricating a sliding surface of a machine in a relative motion, comprising lubricating said sliding surface with the urea grease composition of  claim 1 .  
     
     
         29 . A method of lubricating a sliding surface of a machine in a relative motion, comprising lubricating said sliding surface with the urea grease composition of  claim 2 .  
     
     
         30 . A method of lubricating a sliding surface of a machine in a relative motion, comprising lubricating said sliding surface with the urea grease composition of  claim 3 .  
     
     
         31 . A method of lubricating a sliding surface of a machine in a relative motion, comprising lubricating said sliding surface with the urea grease composition of  claim 5 .  
     
     
         32 . A method of lubricating a sliding surface of a machine in a relative motion, comprising lubricating said sliding surface with the urea grease composition of  claim 8 .  
     
     
         33 . A method of lubricating a sliding surface of a machine in a relative motion, comprising lubricating said sliding surface with the urea grease composition of  claim 11 .  
     
     
         34 . A method of lubricating a sliding surface of a machine in a relative motion, comprising lubricating said sliding surface with the urea grease composition of  claim 14 .  
     
     
         35 . A urea grease composition comprising a lubricating base oil and from 2 to 30 wt. % of a thickening agent, with respect to the total weight of the urea grease composition and wherein said thickening agent is selected from the group consisting of: 
 (1) a mixture comprising compound (a) and compound (b), containing compound (a) at 20 to 80 mol %, relative to the total amount of compound (a) and compound (b);    (2) a mixture formed by mixing a compound (c) with a mixture (1); or    (3) a compound (c) alone,    wherein the compounds are represented by the general formulae   R 1 NHCONHR 2 NHCONHR 1 ;  (a)R 3 NHCONHR 2 NHCONHR 3 ; and  (b)R 1 NHCONHR 2 NHCONHR 3 ,  (c)   and wherein R 2  is a diphenylmethane group, R 1  is a C8 saturated alkyl group, R 3  is a C14-20 saturated and/or unsaturated alkyl group, with the alkyl groups being such that this constituent includes at least 20 mol % of an oleyl constituent.

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