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deflocculant

1. n. [Drilling Fluids]

A thinning agent used to reduce viscosity or prevent flocculation; incorrectly called a "dispersant." Most deflocculants are low-molecular weight anionic polymers that neutralize positive charges on clay edges. Examples include polyphosphates, lignosulfonates, quebracho and various water-soluble synthetic polymers.

Synonyms: thinner

Antonyms: flocculant

See: acrylamide polymeracrylate polymerBingham plastic modelbland coring fluidcarbonate ionchrome lignosulfonatechrome-freeclay-water interactionconventional muddeflocculated muddirect-indicating viscometerdrill solidsgel strengthgyp mudkill-weight fluidligninlignitelignosulfonatephosphate saltplastic viscositypolar compoundpolymerred mudrheologySAPPsulfonated polystyrene-maleic anhydride copolymertannic acidtanninyield point

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