Dispersants Derived From Hydroxy Fatty Acid Polyesters And Polyalkylene Glycol Dispersants

• US 20150094245A1
• Filed: 04/08/2013
• Published: 04/02/2015
• Est. Priority Date: 04/11/2012
• Status: Active Grant

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Inventors: Gieselman, Matthew D., Jones, Joanne L., Eveland, Renee A.
• Granted Patent: US 9,644,164 B2
• Time in Patent Office: Days
• US Class Current: 508/308
• CPC Class Codes: C09K 23/16 Amines or polyamines
• CPC Class Codes: C10M 107/34 Polyoxyalkylenes
• CPC Class Codes: C10M 145/24 Polyethers
• CPC Class Codes: C10M 149/14 a condensation reaction being involved
• CPC Class Codes: C10M 149/22 Polyamines
• CPC Class Codes: C10M 2207/026 with tertiary alkyl groups
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2209/102 Polyesters
• CPC Class Codes: C10M 2209/103 Polyethers, i.e. containing di- or higher polyoxyalkylene groups
• CPC Class Codes: C10M 2209/104 of alkylene oxides containing two carbon atoms only
• CPC Class Codes: C10M 2209/105 of alkylene oxides containing three carbon atoms only
• CPC Class Codes: C10M 2215/042 containing hydroxy groups; Alkoxylated derivatives thereof
• CPC Class Codes: C10M 2215/064 Di- and triaryl amines
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2217/041 involving a condensation reaction
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2020/04 Molecular weight; Molecular weight distribution
• CPC Class Codes: C10N 2030/04 Detergent property or dispersant property
• CPC Class Codes: C10N 2040/25 Internal-combustion engines

Abstract

The disclosed invention relates to a dispersant composition comprising at least one block derived from (i) a polyester of a hydroxy substituted carboxylic acid and at least one block derived from (ii) a polyalkylene glycol terminated by a amine group or a hydroxyl group. The invention also provides lubricating compositions containing the described dispersant as well as methods of making and using the described dispersant, including method of making the dispersant, methods of lubricating an engine with a lubricant containing the described dispersant, and methods of reducing sludge formation in an engine.

Claims

1. A dispersant additive wherein the structure of the additive comprises at least one block derived from (i) a polyester of a hydroxy substituted carboxylic acid and at least one block derived from (ii) a polyalkylene glycol terminated by an amine group or a hydroxyl group.

2. The dispersant of claim 1 wherein the polyester of a hydroxy substituted carboxylic acid is derived from one or more carboxylic acids of formula (I):

3. The dispersant of claim 1 wherein the polyester of a hydroxy substituted carboxylic acid comprises one or more compounds represented by formula (II):

4. The dispersant of claim 1 wherein the carboxylic acid polyester is derived from one or more carboxylic acids selected from the group consisting of 12-hydroxystearic acid, ricinoleic acid, 12-hydroxy dodecanoic acid, 5-hydroxy dodecanoic acid, 5-hydroxy decanoic acid, 4-hydroxy decanoic acid, 10-hydroxy undecanoic acid, or combinations thereof.

5. The dispersant of claim 1 wherein the polyalkylene glycol comprises one or more compounds represented by formula (III):

6. The dispersant of claim 1 wherein the polyalkylene glycol is a polyethylene glycol terminated by an amine group or a hydroxyl group.

7. The dispersant of claim 1 wherein the polyalkylene glycol is selected from the group consisting of (i) a polyethylene glycol, (ii) a polypropylene glycol, (iii) a mixture of polyoxyalkylene amines, or (iv) some combination thereof.

8. The dispersant of claim 1 wherein the polyalkylene glycol is selected from the group consisting of (i) triethylene glycol, (ii) diethylene glycol, (iii) a 250 to 350 molecular weight polyethylene glycol, (iv) a 200 to 350 molecular weight polytetrahydrofuran, (v) a mixture of one or more amine terminated glycols containing units derived from ethylene oxides, propylene oxides, butylene oxides or some combination thereof, or (vi) some combination thereof.

9. The dispersant of claim 1 wherein the dispersant comprises the reaction product of a polyester of a hydroxy substituted carboxylic acid derived from 12-hydroxystearic acid and a polyalkylene glycol selected from the group consisting of (i) triethylene glycol, (ii) diethylene glycol, (iii) a 250 to 350 molecular weight polyethylene glycol, (iv) a 200 to 350 molecular weight polytetrahydrofuran, (v) a mixture of one or more amine terminated glycols containing units derived from ethylene oxides, propylene oxides, butylene oxides, or some combination thereof, or (vi) some combination thereof.

10. A lubricating composition comprising an oil of lubricating viscosity and the dispersant of claim 1.

11. A method of making a dispersant additive comprising reacting:

(i) a polyester of a hydroxy substituted carboxylic acid, a hydroxy substituted carboxylic acid, or a combination thereof, with

(ii) a polyalkylene glycol terminated by a amine group or a hydroxyl group, an alkylene oxide, or a combination thereof;

resulting in a dispersant additive whose structure includes at least one segment derived from component (i) and at least one segment derived from component (ii).

12. The method of claim 11 wherein the method comprises the step of:

(A) reacting (i) a polyester of a hydroxy substituted carboxylic acid with (ii) a polyalkylene glycol terminated by a amine group or a hydroxyl group;

or

(B) reacting (i) a hydroxy substituted carboxylic acid with (ii) a polyalkylene glycol terminated by a amine group or a hydroxyl group followed by polymerization of the hydroxyl substituted carboxylic acid;

or

(C) reacting (i) a polyester of a hydroxy substituted carboxylic acid with (ii) an alkylene oxide.

resulting in a dispersant additive whose structure includes at least one segment derived from component (i) and at least one segment derived from component (ii).

13. A method of lubricating an engine comprising the step of supply a lubricating composition to the engine, wherein the lubricating composition comprises an oil of lubricating viscosity and a dispersant additive wherein the structure of the additive comprises at least one block derived from (i) a polyester of a hydroxy substituted carboxylic acid and at least one block derived from (ii) a polyalkylene glycol terminated by a amine group or a hydroxyl group.

14. A method of reducing sludge formation in an engine comprising the step of supply a lubricating composition to the engine, wherein the lubricating composition comprises an oil of lubricating viscosity and a dispersant additive wherein the structure of the additive comprises at least one block derived from (i) a polyester of a hydroxy substituted carboxylic acid and at least one block derived from (ii) a polyalkylene glycol terminated by a amine group or a hydroxyl group.