Claims
- 1. A stabilizer system which contains
- (a) 1-[di-(2-ethylhexyl)-aminomethyl[-benztriazole which is substituted by methyl in the 4-position and/or 5-position in the benzene ring, and
- (b) at least one antioxidant selected from the group consisting of pentaerythrityl tetrakis-[3-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionate], isooctyl 3,5-di-tert.-butyl-4-hydroxybenzylmercaptoacetate, o-tert.-butylphenol, 2,6-di-tert.-butyl-4-methylphenol, 4,4'-methylenebis-(2,6-di-tert.-butylphenol), tert.-octylated N-phenyl-1-naphthylamine, and a mixture of monoalkylated and dialkylated tert.-butyldiphenyl-amines/tert.-octyldiphenylamines, where the weight ratio between component (a) and component (b) is 1:2 to 1:10.
- 2. A stabilizer system according to claim 1 which additionally contains
- (c) a compound of formula I ##STR2## in which R.sup.1, R.sup.2 and R.sup.3 are identical or different and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen or C.sub.1 -C.sub.18 -alkyl, C.sub.16 -C.sub.18 -alkenyl methyl, phenyl, naphthyl or C.sub.5 -C.sub.6 -cycloalkyl and R is C.sub.4 -C.sub.12 -alkyl,
- where the weight ratio between component (c) and components (a) plus (b) is 1:0.5 to 1:4.
- 3. A lubricant composition which comprises
- (a) a mineral or snythetic lubricating oil, fluid or grease,
- (b) 0.01 to 5% by weight, based on the total weight of the composition, of an antioxidant according to claim 1 , and
- (c) 0.001 to 5% by weight, based on the total weight of the composition, of the 4-(5-)-methyl-1-[di-(2-ethylhexyl)aminomethyl]-benzotriazole according to claim 1.
- 4. A composition according to claim 3 wherein, based on the total composition, 0.1 to 2% by weight of antioxidant; and 0.01 to 1% by weight of 4-(5-)-methyl-1-[di-((2-ethylhexyl)aminomethyl]-benzotriazole are present.
- 5. A lubricant composition according to claim 3 which additionally contains
- (d) 0.01 to 2% by weight, based on the total composition, of a compound of formula I ##STR3## in which R.sup.1, R.sup.2 and R.sup.3 are identical or different and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen or C.sub.1 -C.sub.18 -alkyl, C.sub.16 -C.sub.18 -alkenyl methyl, phenyl, naphthyl or C.sub.5 -C.sub.6 -cycloalkyl and R is C.sub.4 -C.sub.12 -alkyl.
- 6. A method of stabilising lubricants by adding to them an effective amount of the stabiliser system according to claim 1.
- 7. A method of stabilising lubricants by adding to them an effective amount of the stabiliser system according to claim 2.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6882/83 |
Dec 1983 |
CHX |
|
Parent Case Info
This is a continuation of application Ser. No. 682,630, filed on Dec. 17, 1984, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3697427 |
Byford et al. |
Oct 1972 |
|
3914179 |
Byford et al. |
Oct 1975 |
|
3931022 |
Chesluk et al. |
Jan 1976 |
|
4101431 |
Kuntschik |
Jul 1978 |
|
Non-Patent Literature Citations (1)
Entry |
Smalheer et al.; "Lubricant Additives"; 1967; p. 7. |
Continuations (1)
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Number |
Date |
Country |
Parent |
682630 |
Dec 1984 |
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