BK®-500B is an organoclay (tetraallkyl ammonium bentonite) for solvent-based systems of low,medium and high polarity.
1. Advantages:
¡î High gelling efficiency over low, medium and high polarity organic liquids.
¡î Produce reproducible thixotropic consistency over a wide temperature range.
¡î High viscosity and excellent thickening property 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.
¡î High purity:high percentage of montmorillonite,free cristobalite <1%.
¡î High efficiency:save 30%dosage compared with ordinary grades.
¡î Good dispersion:self-activated in medium/high polar system.Its fineness can reach 10μ or even less.
2. Typical Properties:
|
Color
|
Appearance
|
Density
|
Moisture
(@105¡æ,2hrs)
|
Fineness through 200 mesh
|
Loss on Ignition
( @1000¡æ )
|
|
Light Yellow
|
Free Flowing Powder
|
1.85g/cm3
|
≤3.5%
|
≥99%
|
≤45%
|
3. Typical Applications:
|
¡ñAcrylic paint
|
¡ñSolvent epoxy paint
|
|
¡ñAlkyd paint
|
¡ñWooden paint
|
|
¡ñBaking paint
|
¡ñZinc-rich paint
|
|
¡ñDecorative paint
|
¡ñInks(mineral oil,vegetable oil)
|
|
¡ñIndustrial paint
|
¡ñVarnish
|
|
¡ñMarine paint
|
¡ñLubricating grease
|
|
¡ñNon-solvent epoxy paint
|
¡ñCosmetics
|
|
¡ñPolyester paint
|
|
4. Incorporations:
BK®-500B belongs to the unconventional type of organoclays group, being an easy-to-disperse, self-activated organoclay, BK®-500B does not require a chemical (polar) activator to reach the proper level of delamination of the organoclay platelet stacks.
BK®-500B can be added at any point in the manufacturing process. If addition is made with polar activator or after grinding,better performance can be expected.
Polar Activator: Dosage of polar activator( such as propylene carbonate, 95%ethanol , acetone or 95% methanol) is 20%-30% by weight of BK®-500B.
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®-500B 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%-0.8% based on the total formulation weight.
6. International Countertypes:
Bentone®SD-1, Bentone®SD-2, Bentone®SD-3, Bentone®1000
Claytone®APA, Claytone®HY, TIXOGEL® MP-100, TIXOGEL® MP-250.