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White powder of organobentonite and organoclay rheology modifier BT-381 in a glass dish on a dark background.
Top-down view of colorful paint cans and brushes on a blue background, illustrating the application of organoclay and organic bentonite rheological additives.
Open cans of yellow, green, and red paint with brushes on a color palette, illustrating the use of organoclay and organic bentonite rheological additives in coatings.
A brush applying transparent paint to a wooden surface, illustrating the use of organic bentonite and organoclay rheological additives in wood coatings.
Blue and yellow inks being poured into a container, illustrating the use of organoclay and organic bentonite rheological additives in ink formulations.
Stacked brown paper bags of organic bentonite and organoclay rheological additive BT-186 on a pallet.

Self-activated Organophilic Bentonite Rheology Modifier BT-381

BT-381 is a high-performance, self-activated organophilic bentonite rheological additive. Engineered for superior ease of use, it can be incorporated directly into the paint-making process without the need for pre-gels or polar activators. BT-381 offers excellent dispersibility, achieving a fineness of less than 40μm, and is specifically optimized for mid-to-low polarity solvent systems. It provides exceptional anti-settling and anti-sag control, effectively forming a stable flocculation structure to ensure optimal rheological performance in high-end paints, inks, and sealants.

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SKU: BT-381 Categories: , , , Brand:

Specifications

Appearance: White free-flowing powder
Volatile content (105°C, 2h): ≤3.5%
Particle size (76μm/200 mesh): ≥95%
Fineness of grind (unmilled): ≤60μm
Ignition loss (850-900°C): ≤40%

Features & Applications
Self-activating (no pre-gel/polar activator required)
Easy dispersion (fineness <40μm)
Suitable for medium-low polarity solvents
Provides rheology control, anti-sagging & flocculation
Used in high-end paints, inks, primers, sealants

Packaging & Storage：

Double-layer packaging (outer kraft paper bag + inner polyethylene film bag) or valve paper bag,
net weight 25±0.25kg or as per customer requirements.
Store in dry conditions at 0-30°C with a shelf life of 24 months.

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