... belongs to smectite(including calcium,sodium,sodium-calcium,magnesium smectite),made from shelling,dispersing,purifying,grading and special organice composing ... bentonite is as the thickener,suspending agent,thixotropic agent and pipe-freeing agent for the oil well drilling.Daily ... and lates paint etc.,acting as the thixotropic agent,latex stabilizer,thickner,the performance is well.Pharmancy ...