SU492536A1 - Lubricant Additive - Google Patents

Description

one

This invention relates to petrochemistry, in particular, to increasing the aquetooxidative stability of lubricating oils with the aid of additives.

It is known that additives are added to lubricating oils to increase antioxidant stability. They are mainly organic compounds of the amine or phenol type. One of the most common anti-acid compositions is a N-phenyl-a-naphthylamine and diphenylamine.

However, these compositions work quickly and the lubricant loses antioxidant stability.

The aim of the invention is to increase the antioxidant stability of lubricating oils.

To do this, in the additive containing a mixture of N-phenyl-a-naphthylamine and diphenylamine, the complex compound of the transition metal of groups I or VI was additionally introduced, following the ratio of the components, by weight. %; a mixture of amines - 75-90, a complex compound of the transition metal-10-25. N-phenyl naphthylamine and diphenylamine can be used in a 1: 1 ratio. The additive is introduced into the oil in an amount of from 0.3 to 3.0%.

The antioxidant properties of oils with additives are assessed by ampoule.

The effectiveness of the antioxidant effect of the additives is determined by the time (, t) for which the complete loss of oxygen occurs (3, ml; in an ampoule (the more tons, the more affective expression).

Example i. Eleven, consisting of 28% of iis - (- tertoutilsalicylaldoxymate) oxygeiyl cobalt (11), 5b% L-phenyl - a - naphthylamine and zo% diphenylamine, are introduced into the synthetic oil, which is pentaerythritol the amount of 1.4 weight. %

Example 2. Additive, consisting of 28% - tert-butylsalicylaldoxymate) nickel (I), Zoo% 1 - phenyl - a - naphthylamine and Zo7o diphenylamine, was introduced into the petaerythritol ester in an amount of 1.4 wt. %

Example 3. Additive, consisting of 28% bns- (6-tert-butylsalicylaldoximet) copper (11), 3% -phenyl-a-naphthylamine and 367o of diphenylamine, was introduced into the penta- erntrite ester in the amount of 1.4 wt. %

An example. Additive, systolic, th of 34% bns- (o - tert-butylsalicylaldoxymate) oxygenyl cobalt (iij, 33% 1 - phenyl - a-naphthylamine and 33% diphenylamine, was introduced into the pentaerythritol ester in 1.4% by weight.

Example 5. Additive, consisting of 16% bis- (3-tert-butylsalicylaldoxymate) oxygenyl cobalt (II), 42% N-phenyl-a-during the absorption of oxygen in the ampoule (), h

0.1 0.3

additive 0.5%; Difennl8, 0

with an additive of 4.5

with an additive of 1.0

with an additive of 1.0

with additive on

with an additive of 2.0

Note. Test temperature 250 ° C.

tilamip and 42% of diphenylamine, are introduced into pentaerythritic zfnr in the amount of 1.4 wt. %

The table shows the comparative data.

antioxidant stability of different

samples.

Claims (2)

1. Lubricant oils based on a mixture of N - phenyl - cc-naphthylamine and diphenylamine, characterized in that, in order to increase the antioxidant stability of oils, the complex compound of a periodic metal of group I or VIII of the periodic system is added to the additive in the following ratio parts weight %: A mixture of N-phenyl-α-captilamine and diphenylamine 75-90 Complex compound of transition metal 10-25 2. The design according to claim 1, that is, that X -feiyl-a-yaptilamy and diphenylamine were introduced in a ratio of 1: 1.