Seal compatibility additive to improve fluoropolymer seal compatibility of lubricant compositions

Patent metadata

Field	Value
Publication number	US-10106759-B2
Application number	US-201414258871-A
Country	US
Kind code	B2
Filing date	Apr 22, 2014
Priority date	Apr 22, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

This disclosure is directed to an additive package for a lubricant composition that provides improved compatibility with fluoropolymer seals. The additive package comprises a seal compatibility additive. The disclosure is also directed to a lubricant composition comprising a base oil and a seal compatibility additive. The seal compatibility additive improves the compatibility with fluoropolymer seals of the resultant lubricant composition.

First claim

The invention claimed is:

1. An additive package for a lubricant composition that provides improved compatibility with fluoropolymer seals, said additive package comprising:
a fluoropolymer seal compatibility additive having a boiling point of from 150 to 450° C. at 1 atmosphere, wherein the fluoropolymer seal compatibility additive comprises
an alkyl halide compound having a general formula:
C n H (2n+2−m) X m   (I)

where n ranges from 2 to 15, 1≤m≤(2n+2), X is iodine; and
wherein the alkyl halide compound is a mono-halide, a di-halide, a tri-halide, or a tetra-halide.

2. The additive package of claim 1 wherein said fluoropolymer seal compatibility additive comprises iodododecane.

3. The additive package of claim 1 further comprising an amine compound.

4. The additive package of claim 3 wherein said amine compound comprises a sterically hindered amine compound.

5. The additive package of claim 3 wherein said amine compound comprises a sterically hindered amine compound having a general formula (VI):

wherein each R 3 is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms;
wherein at least two groups designated by R 3 are an alkyl group; and
wherein each R 4 is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms.

6. The additive package of claim 3 wherein said amine compound comprises an amine dispersant.

7. The additive package of claim 1 further comprising anti-wear agent comprising phosphorous.

8. A lubricant composition that provides improved compatibility with fluoropolymer seals, said lubricant composition comprising:
a base oil; and
a fluoropolymer seal compatibility additive having a boiling point of from 150 to 450° C. at 1 atmosphere, wherein the fluoropolymer seal compatibility additive comprises
an alkyl halide compound having a general formula:
C n H (2n+2−m) X m   (I)

where n ranges from 2 to 15, 1≤m≤(2n+2), X is iodine;
wherein the alkyl halide compound is a mono-halide, a di-halide, a tri-halide, or a tetra-halide; and
wherein said fluoropolymer seal compatibility additive is present in an amount ranging from 0.05 to 1 wt. % based on the total weight of said lubricant composition.

9. The lubricant composition of claim 8 wherein said fluoropolymer seal compatibility additive comprises iodododecane.

10. The lubricant composition of claim 8 wherein said fluoropolymer seal compatibility additive is present in an amount ranging from 0.01 to 10 wt. % based on the total weight of said lubricant composition.

11. The lubricant composition of claim 8 further comprising an amine compound.

12. The lubricant composition of claim 11 wherein said amine compound is present in an amount ranging from 0.01 to 10 wt. % based on the total weight of said lubricant composition.

13. The lubricant composition of claim 11 wherein said amine compound comprises a sterically hindered amine compound.

14. The lubricant composition of claim 11 wherein said amine compound comprises a sterically hindered amine compound having a general formula (VI):

wherein each R 3 is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms;
wherein at least two groups designated by R 3 are an alkyl group; and
wherein each R 4 is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms.

15. The lubricant composition of claim 8 further comprising an anti-wear agent comprising phosphorous.

16. The lubricant composition of claim 8 having a fluoropolymer seal compatibility such that a fluoropolymer seal submerged in said lubricant composition exhibits a change in elongation of from −60 to 10% or a change in tensile strength of from −50 to 10%, when tested according to CEC L-39-T96.

17. A method of lubricating a system comprising a fluoropolymer seal, said method comprising:
providing a lubricant composition that comprises a base oil and a fluoropolymer seal compatibility additive having a boiling point of from 150 to 450° C. at 1 atmosphere, wherein the fluoropolymer seal compatibility additive comprises
an alkyl halide compound having a general formula:
C n H (2n+2−m) X m   (I)

where n ranges from 2 to 15, 1≤m≤(2n+2), X is iodine;
wherein the alkyl halide compound is a mono-halide, a di-halide, a tri-halide, or a tetra-halide; and
wherein said fluoropolymer seal compatibility additive is present in an amount ranging from 0.05 to 1 wt. % based on the total weight of said lubricant composition; and
contacting the fluoropolymer seal with the lubricant composition.

Assignees

• Basf Se

Inventors

• Desantis Kevin
• Hoey Michael
• Jung Al
• Rabbat Phil
• Chasan David
• Jones Stephen

Classifications

• C10N2040/135

  Steam engines or turbines · CPC title

• C10M2215/22

  Heterocyclic nitrogen compounds · CPC title

• C10M2223/047

  Thioderivatives not containing metallic elements · CPC title

• C10N2070/02

  Concentrating of additives · CPC title

• C10M2223/041

  Triaryl phosphates · CPC title