Anti-Oxidants

[MolaKule]

By now we know that the ZDDP ester has been one of the best anti-oxidant and anti-wear compounds ever developed, which makes it a multi-functional additive component.

But anti-oxidants with zero or very low levels of heavy metal content are more desireable in certain driveline lubricants.

Mercaptobenzthiazoles and beta-thiodialkanols are derived from heterocyclic sulfur- and oxygen-containing compositions.


These anti-oxidants are especially suited what driveline fluid?








Guidelines for the Question of the Day:

1. No Piston Cup Lapel Pin will be awarded to the same person within 14 days of a previous award.

2. Please respond with a complete sentence.

3. Please do not post links. If a question arises as to the need for clarification, then sources and links may be requested.

4. Please, no off topic posts.

 

[Stelth]

I'm going with gear oil.

 

[29662]

ATF. Do I get a cookie?

It took a few minutes of reading...

 

[Brybo86]

I'm going with gear oil used as differential fluid.

 

[abycat]

I think gear oil for differentials and or transfer cases. When using a gear oil obviously not t cases that spec atf.

 

[Quest]

hypoid type of gear oil.

Q.

 

[expat]

Is it used in Limited slip (posi) differential oil?

 

[OneEyeJack]

Is the beta-thiodialkanol you reference a monosulfide?

 

[MolaKule]

Originally Posted By: OneEyeJack
Is the beta-thiodialkanol you reference a monosulfide?



The beta-thiodialkanol referenced contains both a monosulfide and a disulfide, with a majority monosulfide content.

 

[MolaKule]

Quote:
Mercaptobenzthiazoles and beta-thiodialkanols are derived from heterocyclic sulfur- and oxygen-containing compositions.


These anti-oxidants are especially suited what driveline fluid?


These anti-oxidants were developed specifically for ATF fluids.

When the newer, longer life ATFs were being speced on paper, it was apparent that an improved anti-oxidant was needed in order to remain stable for the so-called "lifetime" fills.

So BITOG member 29662 shall be awarded the extinguished Piston Cup Lapel Pin.

 

[29662]

Yay. Does it come usps, Fedex, or UPS? lol...

 

[OneEyeJack]

Originally Posted By: MolaKule
Originally Posted By: OneEyeJack
Is the beta-thiodialkanol you reference a monosulfide?



The beta-thiodialkanol referenced contains both a monosulfide and a disulfide, with a majority monosulfide content.


Are these compounds obtained through a mixture of an aromatic amine such as an alkylated diphenylamine and the resulting product of a monohydric alcohol combined with a beta-thiodialkanol (spelling???). In other words is this stuff good for seals and gaskets?

 

[MolaKule]

All additive compounds are tested for elastomer compatibility and this one was no different.