BK®-888 is an organoclay (tetraallkyl ammonium bentonite) for solvent-based systems of low to medium polarity.
1. Advantages:
ˇî High gelling efficiency over low to medium polarity organic liquids. ˇî Ideal thixotropy property and anti-sediment property. ˇî Good viscosity and thickening property over a wide temperature range. ˇî Imparts particle suspension, preventing hard settling of pigment and fillers. ˇî Exerts strong film reinforce action in organic binder systems.
2. Typical Properties:
Color
Appearance
Density
Moisture (@105ˇć,2hrs)
Fineness through 200 mesh
Loss on Ignition ( @1000ˇć )
Off White
Free Flowing Powder
1.7g/cm3
≤3.5%
≥98%
≤35%
3. Typical Applications:
ˇńAlkyd paint
ˇńIndustrial paint
ˇńAnti-corrosion paint
ˇńPrimer paint
ˇńChlorinated rubber paint
ˇńRoad paint
ˇńContainer paint
ˇńSealant
4. Incorportions:
BK®-888 belongs to the conventional type of organoclay group, which requires mechanical energy, shear forces applied with a goods dispersion equipment, and a chemical (polar) activator to reach the proper level of delamination of the organoclay platelet stacks. Polar Activator: Dosage of polar activator ( such as propylene carbonate, 95%ethanol , acetone or 95% methanol) is 40%-60% by weight of BK®-888. It is always recommended to determine the proper level of addition by experiment. Either defect or excess of chemical activator would result in poorer viscosity development.
5. Recommended Levels:
The amount of BK®-888 rheological additive required depends upon the type of organic system and the degree of thickening or other properties desired. Addition levels are typically between 0.2%-2.0% based on the total formulation weight.
