Name: Organically-Modified Bentonite BT-200
Brand: Coatingsink
SKU: bentonite-waterborne-bt200
Availability: InStock

Question 1

How should BT-200 be dispersed in a waterborne coating formulation?

Accepted Answer

BT-200 should be pre-dispersed in water using high-shear mixing (2000–3000 rpm) before addition to the main batch. A pre-gel step using 5–10 parts water per part bentonite at 60–70°C improves swelling efficiency and ensures full thixotropic activation. Avoid adding dry powder directly into a completed formulation.

Question 2

Does BT-200 affect the gloss or clarity of waterborne topcoats?

Accepted Answer

At recommended dosage levels (0.5–1.5%), BT-200 has minimal impact on final film gloss. For high-gloss topcoats, dosage should be kept below 1% and the pre-gel should be fully hydrated prior to let-down to prevent undispersed particles that could cause hazing or seeding.

Question 3

Can BT-200 be used alongside HEUR or HASE thickeners?

Accepted Answer

Yes. BT-200 is compatible with both HEUR and HASE associative thickeners and is often used in combination at lower treat rates to build low-shear viscosity and improve pigment anti-settling without significantly increasing high-shear viscosity or application drag.

Appearance	Off-white to cream powder
Moisture Content	≤5%
Particle Size D50	≤15 µm
Recommended Dosage	0.5–2.0%
pH (5% dispersion, 25°C)	8.5–10.5

Organically-Modified Bentonite BT-200

Specifications

FAQ

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