Grease containing diamine corrosion inhibitors

• US 5,851,969 A
• Filed: 03/14/1997
• Issued: 12/22/1998
• Est. Priority Date: 03/14/1997
• Status: Expired due to Fees

• Current Assignee: Exxon Research and Engineering Company (Exxon Mobil Corporation)
• Original Assignee: Exxon Research and Engineering Company (Exxon Mobil Corporation)
• Inventors: Andrew, David Leslie, Slack, Brian Leslie
• Primary Examiner(s): McAvoy, Ellen M.
• Application Number:
  US08/815,018
• Time in Patent Office: 648 Days
• Field of Search: 508/556, 508/558
• US Class Current: 508/556
• CPC Class Codes: C10M 107/02 Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
• CPC Class Codes: C10M 107/10 containing aliphatic monomer having more than 4 carbon atoms
• CPC Class Codes: C10M 115/08 containing nitrogen
• CPC Class Codes: C10M 117/04 containing hydroxy groups
• CPC Class Codes: C10M 117/06 having more than one carboxyl group bound to an acyclic carbon atom or cycloaliphatic carbon atom
• CPC Class Codes: C10M 117/08 having only one carboxyl group bound to a carbon atom of a six-membered aromatic ring
• CPC Class Codes: C10M 119/24 containing nitrogen
• CPC Class Codes: C10M 129/10 having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
• CPC Class Codes: C10M 129/14 containing at least 2 hydroxy groups
• CPC Class Codes: C10M 133/06 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 133/12 having amino groups bound to a carbon atom of a six-membered aromatic ring
• CPC Class Codes: C10M 133/42 Triazines
• CPC Class Codes: C10M 135/24 containing hydroxy groups; Derivatives thereof
• CPC Class Codes: C10M 135/28 containing sulfur atoms bound to a carbon atom of a six-membered aromatic ring
• CPC Class Codes: C10M 135/36 the ring containing sulfur and carbon with nitrogen or oxygen
• CPC Class Codes: C10M 169/00 Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
• CPC Class Codes: C10M 2205/02 containing acyclic monomers
• CPC Class Codes: C10M 2205/0206 used as base material
• CPC Class Codes: C10M 2205/028 containing aliphatic monomers having more than four carbon atoms
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2207/023 : having hydroxy groups bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2207/024 : having at least two phenol groups but no condensed ring
• CPC Class Codes: C10M 2207/026 : with tertiary alkyl groups
• CPC Class Codes: C10M 2207/027 : Neutral salts thereof
• CPC Class Codes: C10M 2207/04 : Ethers; Acetals; Ortho-esters; Ortho-carbonates
• CPC Class Codes: C10M 2207/123 : polycarboxylic
• CPC Class Codes: C10M 2207/1245 : used as thickening agent
• CPC Class Codes: C10M 2207/125 : having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
• CPC Class Codes: C10M 2207/1285 : used as thickening agents
• CPC Class Codes: C10M 2207/129 : having hydrocarbon chains of thirty or more carbon atoms
• CPC Class Codes: C10M 2207/1415 : used as thickening agent
• CPC Class Codes: C10M 2207/144 : containing hydroxy groups
• CPC Class Codes: C10M 2207/146 : having carboxyl groups bound to carbon atoms of six-membeered aromatic rings having a hydrocarbon substituent of thirty or more carbon atoms
• CPC Class Codes: C10M 2207/22 : Acids obtained from polymerised unsaturated acids
• CPC Class Codes: C10M 2215/006 : used as thickening agents
• CPC Class Codes: C10M 2215/026 : used as thickening agents
• CPC Class Codes: C10M 2215/04 : having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/06 : having amino groups bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2215/064 : Di- and triaryl amines
• CPC Class Codes: C10M 2215/065 : Phenyl-Naphthyl amines
• CPC Class Codes: C10M 2215/066 : Arylene diamines
• CPC Class Codes: C10M 2215/067 : Polyaryl amine alkanes
• CPC Class Codes: C10M 2215/068 : having amino groups bound to polycyclic aromatic ring systems, i.e. systems with three or more condensed rings
• CPC Class Codes: C10M 2215/0813 : used as thickening agents
• CPC Class Codes: C10M 2215/1013 : used as thickening agents
• CPC Class Codes: C10M 2215/102 : Ureas; Semicarbazides; Allophanates
• CPC Class Codes: C10M 2215/1026 : used as thickening material
• CPC Class Codes: C10M 2215/121 : used as thickening agents
• CPC Class Codes: C10M 2215/2206 : used as thickening agents
• CPC Class Codes: C10M 2215/222 : Triazines
• CPC Class Codes: C10M 2215/2275 : used as thickening agents
• CPC Class Codes: C10M 2215/26 : Amines
• CPC Class Codes: C10M 2217/042 : between the nitrogen-containing monomer and an aldehyde or ketone
• CPC Class Codes: C10M 2217/043 : Mannich bases
• CPC Class Codes: C10M 2219/084 : containing hydroxy groups; Derivatives thereof
• CPC Class Codes: C10M 2219/086 : containing sulfur atoms bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2219/087 : containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
• CPC Class Codes: C10M 2219/089 : Overbased salts
• CPC Class Codes: C10M 2219/10 : Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
• CPC Class Codes: C10M 2219/102 : containing sulfur and carbon only in the ring
• CPC Class Codes: C10M 2219/104 : containing sulfur and carbon with nitrogen or oxygen in the ring
• CPC Class Codes: C10M 2219/106 : Thiadiazoles
• CPC Class Codes: C10M 2219/108 : Phenothiazine
• CPC Class Codes: C10N 2010/02 : Groups 1 or 11
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/06 : Groups 3 or 13
• CPC Class Codes: C10N 2030/12 : Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives

Abstract

The present invention is directed to a grease containing base oil, a thickener and a hydrocarbyl substituted diamine additive exhibiting enhanced resistance to corrosion.

Claims

1. A lubricating grease comprising a major portion of a base oil of lubricating viscosity and a minor portion of additives comprising a thickener and a diamine of the formula ##STR7## wherein R and R'"'"' are the same or different and are C₁ -C₃₀ hydrocarbyl group and the thickener is simple or complex lithium soap, simple or complex calcium soap, mixed lithium and calcium simple or complex soaps, aluminum soaps, urea, di-urea, tri-urea or polyurea.

2. The grease of claim 1 wherein the lease oil of lubricating viscosity is selected from natural or synthetic base oils.

3. The grease of claim 1 wherein the base oil of lubricating viscosity is poly-alpha olefin.

4. The grease of claim 1 wherein the thickener is simple or complex lithium soap, simple or complex calcium soap, mixed lithium and calcium simple soap, or mixed lithium and calcium complex soap.

5. The grease of claim 1 containing from 1 to 30 wt % thickener.

6. The grease of claim 1 containing 0.01 to 10 wt % of the diamine.

7. A method for improving the corrosion resistance of greases thickened using simple or complex lithium soap, simple or complex calcium soap, mixed lithium and calcium simple or complex soaps, aluminum soaps, urea, di-urea, tri-urea or polyurea thickener comprising adding to the grease about 0.01 to 10 wt % of a diamine of the formula ##STR8## wherein R and R'"'"' are the same or different and are C₁ to C₃₀ hydrocarbyl.

8. The method of claim 7 wherein the grease is based on a base oil of lubricating viscosity selected from natural or synthetic base oils.

9. The method of claim 7 wherein the grease contains 1-10 wt % thickener.