Does aeration of a vinyl acetate based emulsion containing carbon fibers reduce LDV?

[yamoffathoo]

thread135-433434

At our plant we use a leak sealing agent comprising carbon fibers (.007 x .1) mm dia/length in DUR-O-SET A-802 emulsion for sealing minor leaks from pinholes (2 mm dia) in pipe. My question is: would aeration while diluting in water reduce the LDV (Lowest Deposition Velocity) of the carbon fibers?

 

[yamoffathoo]

I suppose only experimenting with aerating different concentrations of this emulsion can determine whether aeration can create a temporary density less than water. I was hoping someone in industry knows whether this has a chance of working. The literature on slurry operation advises an LDV of approximately 1 m/s for particulate in water but this emulsion really foams up when air is entrained when diluting with a spray of water.

 

[Latexman]

If aeration generates foam/froth, yes, the apparent density will decrease greatly.

Good Luck,
Latexman

 

[yamoffathoo]

Latexman

I heard back from the manufacturer who advised that the product will only foam a minor amount due to the stabilization package keeping the polymer dispersed. However, if 0.5 - 1.0% ammonium lauryl sulfate (ALS) or sodium lauryl sulfate (SLS) type froth aids are added, the foaming will be increased significantly.