Comparison of Aniline Points

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Found this image on another forum. I wonder what oils, if any, are using OSP's?

One of the key words used in the Valvoline Premium Restore patent was aniline point. You can clearly see based on this image that group V offers formulators solvency options.


1725639781418.jpg
 
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Found this image on another forum. I wonder what oils, if any, are using OSP's?

One of the key words used in the Valvoline Premium Restore patent was aniline point. You can clearly see based on this image that group V offers formulators solvency options.


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@High Performance Lubricants are there any engine oils you offer that use oil soluble PAGs?
 
I know WearCheck can test for Aniline Point on request but they send the sample out to a third party laboratory for additional added cost.
 
Aniline point is key in lubricant formulation, with Group V base oils offering better solvency options. Any engine oils using OSPs out there?
 
From a summary of available literature, since I am too lazy to dig out the textbooks:

Analine itself (C6H5NH2) is also called aminobenzene or phenylamine.

The aniline point is called the "aniline point temperature," which is the lowest temperature at which equal volumes of aniline (C6H5NH2) and the test oil form a single phase and are micible or 'mixable. The aniline point (AP) correlates roughly with the amount and type of aromatic hydrocarbons in an oil sample. A low AP is indicative of higher aromatics, while a high AP is indicative of lower aromatics content.

The aniline point measurement is considered to be a measure of the degree of solvency power or polarity of a base oil. Thus base oils that are rich in ester, ether or aromatic functionalities tend to have lower aniline points than those simply derived from paraffinic or iso-paraffinic feed stocks. So paraffinics or iso-paraffinics have a higher AP.

API Group I base oils have typical AP values of about 100ºC. This increases for modern Group II and III oils since these base oils have much lower levels of aromaticity and polar compounds in their compositions. Polyalphaolefins (PAO) usually have the highest AP values which are typically about 130ºC for commodity lower viscosity PAOs or significantly higher for the heavier viscosity grades. Formulators of modern hydrocarbon lubricants based on Group II-IV oils sometimes find conventional additives are less soluble in base oils with high aniline points and to improve their solubility they often include a more polar base oil such as an ester or an alkylated naphthalene at low treat rates to reduce the AP point.

OSPs, or oil soluble polypolyalkylene glycols, are more hydrolytically stable, may provide greater fluid longevity, have low AP's and better solvencies, to a point. That is, the higher viscosity OSP's have less solvency.

Below is a picture of an ISO-460 OSP in my lab made by Dow Chemical of Midland Mi. The bottle is actually clear glass and the OSP is water clear, thick, and sticky.

It is a Group V base oil, has a viscosity of 52-55 cSt@100C, a viscosity index VII of 180-200, a Pour Point of -33F, and a Flash Point of 560F.

UCON USP-460 OSP.JPG
 
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Buster may have forgotten this one:

 
Buster may have forgotten this one:

So, other than the “risk-adverse (sic)” mentality, and probably initial cost, are there reasons why ICEs could not be run on PAGs/OSPs? Could you touch on a couple of the possible benefits and also limitations if one were to formulate a PAG-based engine oil? Thanks!
 
So, other than the “risk-adverse (sic)” mentality, and probably initial cost, are there reasons why ICEs could not be run on PAGs/OSPs? Could you touch on a couple of the possible benefits and also limitations if one were to formulate a PAG-based engine oil? Thanks!
Good question but not sure what you mean "...could not be run on...?" I assume you are asking about engine oil formulations?

Some PAG types are already being incorporated in engine oils as cleaning chemistry.

Some of the higher viscosity OSP's (such as ISO 460 to 680) are being used in specialty gear lubes where high loads and high temps exist and where longevity is needed.
 
Good question but not sure what you mean "...could not be run on...?" I assume you are asking about engine oil formulations?

Some PAG types are already being incorporated in engine oils as cleaning chemistry.

Some of the higher viscosity OSP's (such as ISO 460 to 680) are being used in specialty gear lubes where high loads and high temps exist and where longevity is needed.
Trying to read between the lines here and also further my knowledge… do OSPs exhibit high oxidation numbers like some esters? Thinking this may be a key tidbit of information in solving a current mystery… thx

And yes, I was only referring to engine oils. I assumed OSPs were being used in some gear lubes already based on the ISO grade you shared from your lab.
 
Here is the article where that image came from. Good article.


I don't believe they show up via oxidation figure but @MolaKule would be better qualified to answer that than I would.
 
Trying to read between the lines here and also further my knowledge… do OSPs exhibit high oxidation numbers like some esters? Thinking this may be a key tidbit of information in solving a current mystery… thx

And yes, I was only referring to engine oils. I assumed OSPs were being used in some gear lubes already based on the ISO grade you shared from your lab.
I don't know what mystery you're trying to solve but OSP's have better hydrolytic stability than esters. The less moisture a lubricant uptakes, the less prone to oxidation it will exhibit.
 
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So if they don’t show up on oxidation, are you following what I’m thinking?
LOL R&P? I'm going to say that's not it simply because Dr. Warholic, who spent 16 years at an additive company said it was found accidently and much to his surprise. He's never seen anything like it.

As far as whether HPL is using them, I don't know I've never seen David mention it. HPL's virgin oxidation values are only the lower end though (23) compared to Amsoil (60) and Red Line (90+). However, we know that doesn't quantify the ester amount.

It would be interesting to know though who is using them.
 
LOL R&P? I'm going to say that's not it simply because Dr. Warholic, who spent 16 years at an additive company said it was found accidently and much to his surprise. He's never seen anything like it.
What additive company did he spend 16 years at and what is his real (full) name?
 
What additive company did he spend 16 years at and what is his real (full) name?

Dr. Michael Warholic - works at Valvoline R&D. Was a research scientist at Infineum and Dow Chemical previously.


"I had never seen anything like it before, and I have eight years at Valvoline and 16 years at a company that makes the additives used in oil formulation.”

 
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