Oxidative passivation of polyamine-dispersants

• US 4,379,064 A
• Filed: 03/20/1981
• Issued: 04/05/1983
• Est. Priority Date: 03/20/1981
• Status: Expired due to Fees

• Current Assignee: Ethyl Corporation (Newmarket Corporation)
• Original Assignee: Standard Oil Company (BP PLC)
• Inventors: Pappas, Peter G., Cengel, John A., Strukl, Joseph S., Hunt, Mark W.
• Primary Examiner(s): Shaver, Paul F.
• Application Number:
  US06/246,007
• Time in Patent Office: 746 Days
• Field of Search: 252/51.5 A
• US Class Current: 508/232
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C10M 149/06 containing monomers having an unsaturated radical bound to an amido or imido group
• CPC Class Codes: C10M 159/16 obtained by Mannich reactions
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/042 containing hydroxy groups; Alkoxylated derivatives thereof
• CPC Class Codes: C10M 2215/08 Amides
• CPC Class Codes: C10M 2215/082 containing hydroxyl groups; Alkoxylated derivatives
• CPC Class Codes: C10M 2215/086 Imides
• CPC Class Codes: C10M 2215/14 Containing carbon-to-nitrogen double bounds, e.g. guanidines, hydrazones, semicarbazones
• CPC Class Codes: C10M 2215/22 Heterocyclic nitrogen compounds
• CPC Class Codes: C10M 2215/221 Six-membered rings containing nitrogen and carbon only
• CPC Class Codes: C10M 2215/224 Imidazoles
• CPC Class Codes: C10M 2215/225 the rings containing both nitrogen and oxygen
• CPC Class Codes: C10M 2215/226 Morpholines
• CPC Class Codes: C10M 2215/26 Amines
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2215/30 Heterocyclic compounds
• CPC Class Codes: C10M 2217/022 containing monomers having an unsaturated radical bound to an amino group
• CPC Class Codes: C10M 2217/023 the amino group containing an ester bond
• CPC Class Codes: C10M 2217/024 containing monomers having an unsaturated radical bound to an amido or imido group
• CPC Class Codes: C10M 2217/046 : Polyamines, i.e. macromoleculars obtained by condensation of more than eleven amine monomers
• CPC Class Codes: C10M 2217/06 : Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines
• CPC Class Codes: C10N 2040/251 : Alcohol-fuelled engines
• CPC Class Codes: C10N 2040/255 : Gasoline engines
• CPC Class Codes: C10N 2040/28 : Rotary engines

Abstract

Mild oxidation of polyamine crankcase dispersants passivates basically reacting polyamine dispersants to fluorocarbon compositions used in engines.

Claims

1. A process for improving the compatibility of a polyamine dispersant with fluorocarbon compositions which comprises reacting said dispersant with an oxidizing agent which is selected from the group consisting of oxygen, sulfur oxides, nitrogen oxides, peroxides and ozone, wherein the amount of said oxidizing agent is effective to reduce the TBN of said dispersant by about 50% to about 90%.

2. The process as set forth in claim 1 wherein said dispersant comprises the reaction product of a polyolefin substituted succinic anhydride and a polyamine.

3. The process as set forth in claim 1 wherein said dispersant comprises the Mannich reaction product of a polyolefin substituted phenol, formaldehyde and a polyamine.

4. The process as set forth in claim 1 wherein said oxidizing agent comprises oxygen.

5. The process as set forth in claim 7 wherein said oxidizing agent comprises air.

6. The process as set forth in claim 1 wherein the dispersant is contacted with about 0.1 to 10.0 moles of said oxidizing agent per mole of dispersant.

7. The process as set forth in claim 1 wherein said reaction is carried out in the presence of an oxidation catalyst.

10. The product prepared by the process of claim 1, 2, 3, 4, 5, 6, 7, 8 or 9.

11. A lubricant comprising a major portion of a lubricating base oil and an effective dispersancy providing amount of the product of claim 10.

8. A process for improving the compatibility of a polyamine dispersant with fluorocarbon compositions which comprises reacting said dispersant with an oxidizing agent at a temperature from about 60°

to 300°

C., wherein said oxidizing agent comprises oxygen and the amount of said oxidizing agent is effective to reduce the TBN of said dispersant by about 50% to about 90%.

9. The process as set forth in claim 8 wherein said oxidizing agent comprises air.