Antioxidant dispersant polymer dendrimer

• US 4,938,885 A
• Filed: 09/28/1989
• Issued: 07/03/1990
• Est. Priority Date: 09/28/1989
• Status: Expired due to Fees

• Current Assignee: Ethyl Additives Corp. (Antwerp Distribution & Product Operations NV)
• Original Assignee: Texaco Incorporated (Chevron Corp.)
• Inventors: Migdal, Cyril A.
• Primary Examiner(s): Howard, Jacqueline V.
• Application Number:
  US07/413,669
• Time in Patent Office: 278 Days
• Field of Search: 252/51.5 A, 252/401
• US Class Current: 508/291
• CPC Class Codes: C08F 110/08 Butenes
• CPC Class Codes: C08F 110/10 Isobutene
• CPC Class Codes: C08F 120/14 Methyl esters , e.g. methyl (meth)acrylate
• CPC Class Codes: C08F 8/30 Introducing nitrogen atoms or nitrogen-containing groups
• CPC Class Codes: C08F 8/32 by reaction with amines
• CPC Class Codes: C08G 83/003 Dendrimers
• CPC Class Codes: C10M 129/32 monocarboxylic
• CPC Class Codes: C10M 133/04 Amines, e.g. polyalkylene polyamines; Quaternary amines polyalkylene polyamines with eleven or more monomer units C10M149/22
• CPC Class Codes: C10M 133/56 Amides; Imides
• CPC Class Codes: C10M 159/12 Reaction products
• CPC Class Codes: C10M 2207/122 monocarboxylic
• CPC Class Codes: C10M 2215/02 Amines, e.g. polyalkylene polyamines; Quaternary amines
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/26 Amines
• CPC Class Codes: C10M 2215/28 Amides; Imides
• 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 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: Y10S 424/16 Dendrimers and dendritic polymers

Abstract

An antioxidant, dispersant lubricating composition comprises the product produced by first reacting an alkyl acrylate with an amine to produce an intermediate product, a first generation polyamine ester dendrimer which is then treated with an amine to produce a first generation polyamidoamine dendrimer which is then reacted with an acrylate to produce a second generation polyamidoamine ester dendrimer which with an amine is converted to a second generation polyamidoamine dendrimer which is then reacted with a polyisobutenyl succinic acid anhydride to produce the reactant product a polyisobutenyl succinimide-polyamidoamine dendrimer polymer.

Claims

1. A lubricating composition comprising a major portion of a lubricating oil and a minor, effective dispersant, amount of a reaction product by a process comprising the following steps which can be repeated any desired number of times, said process comprising:

(a) reacting an amine or polyamine with an alkyl acrylate in the presence of an alkyl alcohol to produce a first generation polyamine ester dendrimer;

(b) reacting said first generation polyamine ester dendrimer with an amine or a polyamine to produce a first generation polyamidoamine dendrimer;

(c) reacting said first generation polyamidoamine dendrimer with an alkyl acrylate to produce a 12-branch second generation polyamidoamine ester dendrimer;

(d) reacting said 12-branch second generation polyamidoamine ester dendrimer with an amine or polyamine to produce a 12-branch second generation polyamidoamine dendrimer; and

(e) reacting said 12-branch second generation polyamidoamine dendrimer with a polyisobutenyl succinimide acid anhydride to produce the product lubricant, a 12-polyisobutenyl succinicimide-12-polyamidoamine dendrimer polymer.

2. The process according to claim 1, wherein said first generation polyamidoamine dendrimer is reacted with a polyisobutenyl succinic acid anhydride to produce a 6-polyisobutenyl succinimide-6-polyamidoamine dendrimer polymer.

3. The process according to claim 1, wherein said alkyl acrylate contains from 1 to 6 carbons.

4. The process of claim 1 wherein said alkyl alcohol contains from 1 to 8 carbons.

5. The process according to claim 2, wherein the polyisobutenyl succinic acid anhydride has a molecular weight (Mn) ranging from about 500 to about 5000.

6. The process of claim 1, wherein said amine is selected from the group consisting of ethylene diamine, NH₃, diethylene-triamine, tetraethylene-triamine, tetraethylene-pentamine, pentalthylenehexamine, ethyleneamine and a polyamine.

7. An antioxidant/dispersant useful in a lubricant, of the formula:

m - polyisobutenyl-succinimide-n-polyamidoamine dendrimer polymer wherein

m=1-1024 and n=4-1024.

8. The antioxidant/dispersant of claim 7, wherein

m=6 and n=6.

9. The antioxidant/dispersant of claim 7, wherein m is 7.2 and n is 8.

10. The antioxidant/dispersant of claim 7, wherein m=12 and n=12.

11. The antioxidant/dispersant of claim 7, wherein m=24 and n=24.

12. The antioxidant/despersant of claim 7, wherein said dendrimer polymer has a molecular weight (Mn) ranging from about 2000 to about 500,000.