Fuel oil compositions with improved cold flow properties

• US 9,605,227 B2
• Filed: 12/20/2013
• Issued: 03/28/2017
• Est. Priority Date: 12/04/2003
• Status: Active Grant

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: Ahlers, Wolfgang, Fechtenkoetter, Andreas, Maehling, Frank-Olaf, Troetsch-Schaller, Irene, Eisenbeis, Ansgar
• Primary Examiner(s): Bernshteyn, Michael M
• Application Number:
  US14/136,401
• Publication Number:
  US 20140107005A1
• Time in Patent Office: 1,194 Days
• Field of Search: 526/329, 526/328.5, 508/472, 443/93
• US Class Current: 1/1
• CPC Class Codes: C08F 210/02 Ethene
• CPC Class Codes: C08F 218/08 Vinyl acetate
• CPC Class Codes: C08F 220/12 of monohydric alcohols or phenols
• CPC Class Codes: C08F 2500/02 Low molecular weight, e.g. <100,000 Da.
• CPC Class Codes: C08F 2500/03 Narrow molecular weight distribution, i.e. Mw/Mn < 3
• CPC Class Codes: C08F 2500/17 Viscosity
• CPC Class Codes: C08F 2800/10 as molar percentages
• CPC Class Codes: C10L 1/1973 mono-carboxylic
• CPC Class Codes: C10L 10/14 for improving low temperature properties
• CPC Class Codes: C10L 10/16 Pour-point depressants
• CPC Class Codes: C10L 2250/04 Additive or component is a polymer
• CPC Class Codes: C10L 2270/026 for diesel engines, e.g. automobiles, stationary, marine
• CPC Class Codes: C10M 145/14 Acrylate; Methacrylate
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10N 2030/08 Resistance to extreme temperature

Abstract

The use is described of polymers which contain, in copolymerized form, an α-olefin, a vinyl ester and an ester of an α,β-unsaturated carboxylic acid as an additive for fuel oils and lubricants and in particular as a cold flow improver in fuel oils. In addition, the fuel oils and lubricants additized with these polymers; and also additive packages comprising such polymers are described.

Claims

1. A polymer, comprising, in copolymerized form:

monomers M1, M2, and M3 of formulae;

2. The polymer according to claim 1, wherein monomers M2 and M3 are copolymerized in random distribution.

3. The polymer according to claim 1,

wherein monomer M1 is ethylene.

4. The polymer according to claim 1,

wherein R², R³, and R⁴ are each H, or two of R², R³, and R⁴ are each H and the other is methyl.

5. The polymer according to claim 1,

wherein R⁵ is n-butyl or 2-ethylhexyl.

6. The polymer according to claim 4,

wherein M2 is n-butyl acrylate or 2-ethylhexyl acrylate.

7. The polymer according to claim 1,

wherein M3 is vinyl acetate.

8. A fuel oil composition, comprising:

a middle distillate fuel having a boiling point of from 120 to 500°

C., and

the polymer of claim 1,

wherein a content of the middle distillate by weight is greater than a content of the polymer by weight.

9. The fuel oil composition according to claim 8, wherein the middle distillate fuel comprises biodiesel from animal or vegetable production.

10. The fuel oil composition according to claim 8, wherein the middle distillate fuel is a diesel fuel, kerosene, or heating oil.

11. The fuel oil composition according to claim 10, wherein the wherein the middle distillate fuel is a diesel fuel obtained by a process comprising refining, coal gasification, or gas liquefaction, or is a mixture of such products and is optionally mixed with renewable fuels.

12. The fuel oil composition according to claim 8, wherein a sulfur content of the fuel oil composition is at most 500 ppm.

13. A lubricant composition, comprising:

a conventional lubricant, and

the polymer of claim 1,

wherein a content of the conventional lubricant by weight is greater than a content of the polymer by weight.

14. An additive package, comprising:

the polymer of claim 1, and

a conventional lubricant or fuel oil additive.