Ashless dispersants

• US 5,296,560 A
• Filed: 08/06/1993
• Issued: 03/22/1994
• Est. Priority Date: 07/03/1990
• Status: Expired due to Fees

• Current Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Original Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Inventors: Gutierrez, Antonio, Kleist, Robert A., Lundberg, Robert D.
• Primary Examiner(s): Lipman, Bernard
• Application Number:
  US08/088,493
• Time in Patent Office: 228 Days
• Field of Search: 525/327.6, 525/329.6, 525/329.9
• US Class Current: 525/327.6
• CPC Class Codes: C08F 110/10 Isobutene
• CPC Class Codes: C08F 8/32 by reaction with amines
• CPC Class Codes: C10L 1/221 compounds of uncertain formula; reaction products where mixtures of compounds are obtained
• CPC Class Codes: C10L 1/238 obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds C10L1/221 takes precedence
• CPC Class Codes: C10M 133/52 having a carbon chain of 30 or more atoms
• CPC Class Codes: C10M 159/12 Reaction products
• CPC Class Codes: C10M 2205/00 Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
• CPC Class Codes: C10M 2207/129 having hydrocarbon chains of thirty or more carbon atoms
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/044 having cycloaliphatic groups
• 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 2215/26 Amines
• 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: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2221/04 : Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C10M 2223/045 : Metal containing thio derivatives
• CPC Class Codes: C10M 2227/00 : Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
• CPC Class Codes: C10M 2227/061 : Esters derived from boron
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2040/00 : Specified use or application for which the lubricating composition is intended
• CPC Class Codes: C10N 2040/02 : Bearings
• CPC Class Codes: C10N 2040/06 : Instruments or other precision apparatus, e.g. damping fluids
• CPC Class Codes: C10N 2040/08 : Hydraulic fluids, e.g. brake-fluids
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines
• CPC Class Codes: C10N 2040/251 : Alcohol-fuelled engines
• CPC Class Codes: C10N 2040/252 : Diesel engines
• CPC Class Codes: C10N 2040/253 : Small diesel engines
• CPC Class Codes: C10N 2040/255 : Gasoline engines
• CPC Class Codes: C10N 2040/28 : Rotary engines
• CPC Class Codes: C10N 2040/30 : Refrigerators lubricants or compressors lubricants
• CPC Class Codes: C10N 2040/32 : Wires, ropes or cables lubricants
• CPC Class Codes: C10N 2040/34 : Lubricating-sealants
• CPC Class Codes: C10N 2040/36 : Release agents or mold release agents
• CPC Class Codes: C10N 2040/38 : Conveyors or chain belts
• CPC Class Codes: C10N 2040/40 : Generators or electric motors in oil or gas winning field
• CPC Class Codes: C10N 2040/42 : Flashing oils or marking oils
• CPC Class Codes: C10N 2040/44 : Super vacuum or supercritical use
• CPC Class Codes: C10N 2040/50 : Medical uses
• CPC Class Codes: C10N 2070/02 : Concentrating of additives

Abstract

According to the present invention, improved dispersants are provided which comprise adducts of (A) polymer-substituted mono- and dicarboxylic acid or anhydrides and (B) bis(para-amino cyclohexyl) methane oligomers, wherein the reactants are contacted in a reaction zone in the substantial absence of polar organic solvents.

Claims

1. Dispersant adduct useful in lubricating oils comprising reaction products of (A) polymer-substituted mono- or dicarboxylic acid or anhydrides derived from the reaction of (i) polyolefin with (ii) monounsaturated carboxylic reactant and (B) bis (para-amino cyclohexyl) methane oligomers;

said reaction being conducted in a manner and under conditions sufficient to formimide, amide or mixtures thereof.

2. The dispersant adduct according to claim 1 wherein the polymer comprises polybutylene.

3. The dispersant adduct according to claim 2 wherein the polymer comprises polyisobutylene.

4. The dispersant adduct according to claim 1 wherein the reactant (A) comprises a polymer-substituted succinic acid or anhydride.

5. The dispersant adduct according to claim 4 wherein reactant (A) is derived by the reaction of maleic anhydride and a polybutylene having a number average molecular weight of from about 1,300 to 3,000.

6. The dispersant adduct according to claim 1 wherein the reactant (B) contains from about 8 to 16 wt. % total N.

7. The dispersant adduct according to claim 1 wherein the dispersant adduct contains at least one primary or secondary amino group per molecule.

8. The dispersant adduct according to claim 7 wherein the dispersant adduct contains from 1 to 15 primary or secondary amine groups per molecule.