vinylversatate emulsion
vinylversatate emulsion
(OP)
we have a problem with the production of the vinyl versatate emulsion ( latex for paint) during the second stage (propagation) too much reflux happens, we loose exothermic reaction, we can't understand the cause of the problem.
i need some helps.
i need some helps.





RE: vinylversatate emulsion
I recommend you study the Posting Guidelines (to the right of "Reply To This Thread"). Concentrate on "Tips on how to write a 'good' question". If English is not your mother tongue, and this is causing a problem being understood, re-double your efforts.
I have dozens of questions rolling around in my mind whose answers would help me figure out the problem, but I'm not going to ask them . . . not yet.
Give it another shot manelchem. This time, include as many details as you can (P&ID, recipe, temps., pressures, flows, etc.) For example, I doubt this is a vinyl versatate homopolymer, right?
Good luck,
Latexman
RE: vinylversatate emulsion
For this I would thank you for your interesting and I will explain more my problematic.
we are producing a latex based on vam/veova/Acrylic acid, we used to do the same recipe in the main rector with out any problem but last two week the production wasn't OK, we had a lot of reflux which decreases temperature of the reaction ( from 82-81 to 76°C), we couldn't control the reflux so the end product was rich of free monomers and with very low viscosity (200cP instead of 1500cP) and a low solid content ( 46% instead of 50%).
We did the same recipe in the pilot plant with exactly the same raw materials, the result was OK , reaction worked well, and we didn't see any reflux.
We have inspected the reactor and have seen any problem so.
RE: vinylversatate emulsion
Good luck,
Latexman
RE: vinylversatate emulsion
Good luck,
Latexman
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