Amine terminated and hydroxyl terminated polyether dispersants

Patent metadata

Field	Value
Publication number	US-9624452-B2
Application number	US-201514830884-A
Country	US
Kind code	B2
Filing date	Aug 20, 2015
Priority date	Apr 11, 2012
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

The disclosed technology relates to a dispersant composition comprising the reaction product of a polyolefin acylating agent and an amine terminated or hydroxyl terminated polyether. In addition, the technology relates to lubricating compositions containing the dispersant composition and an optional synergistic amount of another dispersant, as well as methods of employing the dispersant composition in an engine and engine oils.

First claim

What is claimed is:

1. A dispersant composition comprising the reaction product of a polyolefin acylating agent, and a hydroxyl terminated polyether, wherein the polyolefin has a number average molecular weight of greater than 5000, and wherein the hydroxyl terminated polyether is selected from a 200 to 350 molecular weight polytetrahydrofuran.

2. The dispersant composition of claim 1 wherein the polyolefin acylating agent is the reaction product of a polyolefin selected from polyisobutylene or an olefin-copolymer with a carboxylic acid selected from monoethylenically unsaturated C 3 -C 28 monocarboxylic acid or ester thereof, or monoethylenically unsaturated C 4 C 28 dicarboxylic acid, anhydride or ester thereof.

3. The dispersant composition of claim 2 wherein the reaction is not free-radically initiated.

4. The dispersant composition of claim 2 wherein the carboxylic acid is maleic acid, itaconic acid, fumaric acid, and anhydrides or esters thereof.

5. The dispersant composition of claim 1 wherein the reaction product further comprises a polyethylene polyamine.

6. A lubricant composition comprised of a dispersant composition according to claim 1 , and an oil of lubricating viscosity.

7. The lubricant composition of claim 6 further comprising a PIB Succinimide.

8. A method of improving deposit performance in an engine comprising applying to the engine the composition of claim 6 .

9. A method of improving nitration and oxidation performance in an engine oil comprising applying to the engine the composition of claim 6 .

10. A method of improving seal performance in an engine comprising applying to the engine a composition as claimed in any of claims 6 .

11. A method of maintaining TBN in an engine oil comprising applying to the engine oil a dispersant composition as claimed in claim 1 .

12. The method of claim 11 further comprising applying to the engine oil a PIB Succinimide.

Assignees

• Lubrizol Corp

Inventors

• Delbridge Ewan E
• Eveland Renee A
• Jones Joanne L
• Pudelski John K
• Proust Nicholas

Classifications

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10M2209/107

  of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106 · CPC title

• C10M2215/06

  having amino groups bound to carbon atoms of six-membered aromatic rings · CPC title

• C10M133/56

  Amides; Imides · CPC title

• C10M161/00 Primary

  Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential · CPC title