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

Question

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

yamoffathoo (Mechanical)

(OP)

7 Apr 24 15:47

thread135-433434: Vinyl acetate ethylene reactions and solubility

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 (Mechanical) · Answer 1 · 2024-04-13 15:21:24

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 (Chemical) · Answer 2 · 2024-04-13 15:48:44

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

Good Luck,
Latexman

yamoffathoo (Mechanical) · Answer 3 · 2024-04-20 00:13:35

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.

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