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Why Organic Thickeners Behave Differently in High-Shear vs. Low-Shear Conditions

2025-12-12

Organic thickeners exhibit shear-dependent behavior that significantly influences a coating’s flow, application properties,
and overall performance. Their response under low-shear conditions differs fundamentally from their behavior at high shear,

and this distinction is critical for formulators seeking predictable viscosity and stable rheology profiles.

At low shear, organic thickeners strengthen the coating’s internal network, increasing viscosity and maintaining stability.

Under high shear, the same network momentarily relaxes, resulting in lower viscosity and better flow. This controlled,

reversible response is what allows organic thickeners to perform consistently across different processing and application

conditions.

For formulators, the key takeaway is that no single viscosity value tells the whole story. Organic thickeners must be evaluated

across low-, mid-, and high-shear ranges to ensure the coating behaves correctly at rest, during application, and after film

formation. Matching the thickener’s shear response to the coating’s requirements is critical for achieving stable, predictable

performance.

In short, recognizing the dual behavior of organic thickeners is key to achieving predictable rheology. When the right thickener is paired with the right shear profile, coatings become easier to formulate, apply, and maintain across real-world conditions.

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Why Organic Thickeners Behave Differently in High-Shear vs. Low-Shear Conditions

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