BK®-388 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:
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Color
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Appearance
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Density
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Moisture
(@105¡æ,2hrs)
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Fineness through 200 mesh
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Loss on Ignition
( @1000¡æ )
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Light Yellow
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Free Flowing Powder
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1.85g/cm3
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≤3.5%
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≥99%
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≤45%
|
3. Typical Applications:
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¡ñAcrylic paint
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¡ñSolvent epoxy paint
|
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¡ñAlkyd paint
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¡ñWooden paint
|
|
¡ñBaking paint
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¡ñZinc-rich paint
|
|
¡ñDecorative paint
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¡ñInks(mineral oil,vegetable oil)
|
|
¡ñIndustrial paint
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¡ñVarnish
|
|
¡ñMarine paint
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¡ñLubricating grease
|
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¡ñNon-solvent epoxy paint
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¡ñCosmetics
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¡ñPolyester paint
|
|
4. Incorporations:
BK®-388 belongs to the unconventional type of organoclays group, being an easy-to-disperse, self-activated organoclay, BK®-388 does not require a chemical (polar) activator to reach the proper level of delamination of the organoclay platelet stacks.
BK®-388 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®-388.
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®-388 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.