Hi everyone,
Can you please tell me what is the difference between the dispersants Darvan C (now Darvan C-N) and Darvan 821-A?
I know that Darvan C-N has a longer chain length than Darvan 821-A, but what is the consequence of this?
I would really appreciate some insights on this matter.
Many Thanks,
Kirpal
Dear Dr. Singh:
Both Darvan belong to class of ammonium polymeric monomers that can disperse in water. This deflocculant can be used in ceramic dispersions giving low viscosity slip and low foam production being proper for long times of mixture or grinding.
Darvan C is an Ammonium polymethacrylate aqueous solution.
Data sheet: http://www.bayvillechemical.net/production-chemicals/darvan-c-n/
Darvan 821-A is an Ammonium polyacrylate.
Some specific application can be found in:
http://digitalfire.com/4sight/material/darvan_260.html
http://www.vanderbiltminerals.com/product_categories/product_listing/category/paint-and-coatings-products-darvanreg-dispersing-agents
The effect of chain is complex depending on the powder and its surface charge, particle size distribution and another parameters. In attach, there is a investigation of effect of chain lenght deflocculant under stability of dispersion, a paper dowlounded from web.
As a whole there is a great number of Darvan's
Kind regards
Marcos Nobre
Dear Dr. Singh:
Both Darvan belong to class of ammonium polymeric monomers that can disperse in water. This deflocculant can be used in ceramic dispersions giving low viscosity slip and low foam production being proper for long times of mixture or grinding.
Darvan C is an Ammonium polymethacrylate aqueous solution.
Data sheet: http://www.bayvillechemical.net/production-chemicals/darvan-c-n/
Darvan 821-A is an Ammonium polyacrylate.
Some specific application can be found in:
http://digitalfire.com/4sight/material/darvan_260.html
http://www.vanderbiltminerals.com/product_categories/product_listing/category/paint-and-coatings-products-darvanreg-dispersing-agents
The effect of chain is complex depending on the powder and its surface charge, particle size distribution and another parameters. In attach, there is a investigation of effect of chain lenght deflocculant under stability of dispersion, a paper dowlounded from web.
As a whole there is a great number of Darvan's
Kind regards
Marcos Nobre
Dear Dr. Marcos,
Thank you so much so the detailed explanation and attachments. I really appreciate it.
Best Regards.
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