Claims
- 1. A process for improving the compatibility of a lubricating oil composition, comprising at least one dispersant containing basic nitrogen atoms, with fluorocarbon elastomers, said method comprising adding an effective quantity of borated compounds having the following general formula (I): ##STR5## in which X is S or O, and R is a hydrocarbyl group containing at least 3 carbon atoms, wherein said dispersant is a bis-succinimide, and wherein:
- (a) when the bis-succinimide is post-treated with ethylene carbonate, the minimum ratio %Boron/% basic N of the lubricating oil composition is situated around 1.0, and
- (b) when the bis-succinimide is not subjected to a post-treatment step, the minimum ratio %Boron/% basic N of the lubricating oil composition is situated around 3.0.
- 2. A process for improving the compatibility of a lubricating oil composition according to claim 1 wherein R is a hydrocarbyl group containing between 3 and 50 carbon atoms.
- 3. A process for improving the compatibility of a lubricating oil composition according to claim 1 wherein R is a hydrocarbyl group containing between 3 and 17 carbon atoms.
- 4. A process for improving the compatibility of a lubricating oil composition according to claim 1 wherein the compound of general formula (I) is borated glycerol mono-oleate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
97 05512 |
May 1997 |
FRX |
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Parent Case Info
This application is a continuation of U.S. Ser. No. 09/065,002 filed on Apr. 23, 1998, now abandoned which claimed priority under 35 U.S.C. .sctn.119 based upon French Patent Application No. 9705512 filed on May 5, 1997.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
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0 136 185 |
Apr 1985 |
EPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
065002 |
Apr 1998 |
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