"Noack" of pour point helpers

[thickvthin]

Do pour point helpers have a high "Noack", flash point, burnoff tendencies etc? How much is required typically to push the pour point down say 10 to 20 degrees for gtl v. pao v. non synthetic oil?

 

[twX]

Pour point depressant is generally not very volatile.

Its concentration in an oil using Group I, II, or III base stocks would typically be around 0.1% to 0.3%. GTL and PAO shouldn't need as much due to their lower pour points.

 

[thickvthin]

Pour point depressant is generally not very volatile.

Its concentration in an oil using Group I, II, or III base stocks would typically be around 0.1% to 0.3%. GTL and PAO shouldn't need as much due to their lower pour points.

how much would .1% being down group iii versus say .3%?

 

[twX]

how much would .1% being down group iii versus say .3%?

I don't understand. Are you asking what the difference in pour point would be between those two concentrations?

 

[thickvthin]

I don't understand. Are you asking what the difference in pour point would be between those two concentrations?

yes. .1% pour point concentration v. .3%

 

[twX]

yes. .1% pour point concentration v. .3%

Here's an example. The difference in pour point between the two doses is not very large, but the oil treated at 0.1% has an MRV 4 times higher (and it fails the test since high yield stress is >35 Pa).

A different type of PPD used in the same study was effective at 0.1%, but not at 0.05% (and it performed just slightly worse at 0.2% vs 0.1%). The required dose is dependent on the specific type of PPD used, and above a certain dose, there's no additional benefit.

 

[thickvthin]

Here's an example. The difference in pour point between the two doses is not very large, but the oil treated at 0.1% has an MRV 4 times higher (and it fails the test since high yield stress is >35 Pa).

A different type of PPD used in the same study was effective at 0.1%, but not at 0.05% (and it performed just slightly worse at 0.2% vs 0.1%). The required dose is dependent on the specific type of PPD used, and above a certain dose, there's no additional benefit.

View attachment 322323

Thank you. If pour point is -30c. then is mrv at -35c on a gel?