BK®-885 is an organoclay (tetraallkyl ammonium bentonite) for
solvent-based systems of medium to high polarity.
1. Advantages:
¡î High gelling efficiency over medium to high polarity organic liquids, especially in xylene, heavy aromatics, butyl acetate, ketone, alcohol and compound of above.
¡î Produce reproducible thixotropic consistency over a wide temperature range.
¡î Imparts particle suspension, preventing hard settling of pigment and fillers.
¡î Exerts strong film reinforce action in organic binder systems.
2. Typical Properties:
|
Color
|
Appearance
|
Density
|
Moisture
(@105¡æ,2hrs)
|
Fineness through 200 mesh
|
Loss on Ignition
( @1000¡æ )
|
|
Light Yellow
|
Free Flowing Powder
|
1.7g/cm3
|
≤3.5%
|
≥98%
|
≤35%
|
3. Typical Applications:
|
¡ñAlkyd paint
|
¡ñRoad paint
|
|
¡ñAnti-corrosion paint
|
¡ñSolvent epoxy paint
|
|
¡ñChlorinated rubber paint
|
¡ñZinc-rich paint
|
|
¡ñIndustrial paint
|
¡ñNitro lacquer
|
|
¡ñPrimer paint
|
¡ñAdhesive
|
|
¡ñPolyester paint
|
|
4. Incorporations:
BK®-885 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 30%-60% by weight of BK®-885.
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®-885 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.
6. International Countertypes: Tixogel® VZ, Bentone®27