Name: Aluminum Stearate Anti-Settling AL-ST
Brand: Coatingsink
SKU: aluminum-stearate-antisettling
Availability: InStock

Question 1

How does aluminum stearate build thixotropy in solvent-based coatings?

Accepted Answer

Aluminum stearate forms a weak gel network through coordination bonds with binder hydroxyl groups and physical entanglement of its long-chain fatty acid arms. This network breaks under shear—allowing easy application—and reforms at rest, preventing pigment settling and sagging.

Question 2

Can aluminum stearate be combined with organoclay thickeners?

Accepted Answer

Yes—aluminum stearate is synergistic with organoclays such as hectorite and bentonite. Using both at reduced individual loadings (0.3–0.5% each) typically delivers superior anti-settling and sag resistance compared to using either additive alone at full dose.

Question 3

What activators improve the effectiveness of aluminum stearate?

Accepted Answer

Polar activators such as ethanol or propylene carbonate at 0.1–0.3% on binder significantly accelerate gel network formation. Aromatic and aliphatic hydrocarbon solvents alone give slower activation and may require elevated-temperature dispersion (80–90°C).

Appearance	White fine powder
Ash Content	9.0–11.0%
Melting Point	145–155°C
Free Fatty Acid	≤5%
Particle Size (D50)	≤45 µm

Aluminum Stearate Anti-Settling AL-ST

Specifications

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