Claims
- 1. A composition comprising
- (a) at least one functional fluid subject to oxidative, thermal or actinic degradation, and
- (b) at least one compound of formula I ##STR106## wherein R.sup.1 is alkyl having 1 to 8 carbon atoms, cyclohexyl or phenyl,
- R.sup.2 is hydrogen, alkyl having 1 to 8 carbon atoms, cyclohexyl or phenyl,
- R.sup.3 is hydrogen,
- n is 1, and
- A is --OR.sup.4 where R.sup.4 is hydrogen or alkyl having 9 to 18 carbon atoms.
- 2. A composition according to claim 1, containing at least one compound of formula I wherein R.sup.1 is tert.-butyl, R.sup.2 is --H, --CH.sub.3 or tert.-butyl, and R.sup.3 is --H and n is 1 and A is --OR.sup.4 and R.sup.4 is C.sub.9 -C.sub.18 alkyl.
- 3. A composition according to claim 1 containing a) a lubricant selected from the group consisting of mineral oils, synthetic oils or a mixture thereof and b) at least one compound of formula I according to claim 1.
- 4. Process of improving the anti-oxidant properties of lubricants by incorporation of at least one compound of formula I according to claim 1 into said lubricant.
- 5. A composition according to claim 1 wherein said compound of formula I is octadecyl 2-methyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate.
- 6. A composition according to claim 1, containing at least one compound of the formula ##STR107## wherein R.sup.4 is C.sub.1 -C.sub.18 alkyl.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3959/88 |
Oct 1988 |
CHX |
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Parent Case Info
This is a continuation of application Ser. No. 08/008,060, filed on Jan. 22, 1993, now abandoned, which is a continuation of application Ser. No. 07/827,907, filed on Jan. 30, 1992, now abandoned, which is a continuation of application Ser. No. 07/423,167, filed on Oct. 18, 1989, now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (2)
Number |
Date |
Country |
288254 |
Oct 1988 |
EPX |
2028866 |
Mar 1980 |
GBX |
Non-Patent Literature Citations (3)
Entry |
Chem. Abstract 111:8445e (1989). |
Chem. Abstract 111:155122a (1989). |
C.A. 99:161228q (1983). |
Continuations (3)
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Number |
Date |
Country |
Parent |
8060 |
Jan 1993 |
|
Parent |
827907 |
Jan 1992 |
|
Parent |
423167 |
Oct 1989 |
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