Name: Sodium Hexametaphosphate Dispersant SHMP
Brand: Coatingsink
SKU: sodium-hexametaphosphate-dispersant-shmp
Availability: InStock

Question 1

At what dosage should SHMP be used for dispersing calcium carbonate extenders?

Accepted Answer

Typical dosage is 0.1–0.3% on the weight of the mineral pigment. For fine-particle CaCO3 (d50 < 2 µm) or high-loading slurries above 70% solids, dosage may be increased to 0.5% to maintain adequate viscosity reduction and prevent re-agglomeration.

Question 2

Is SHMP compatible with latex binders and other additives in waterborne formulations?

Accepted Answer

SHMP is generally compatible with styrene-acrylic and vinyl-acrylic latex binders. However, high concentrations can interfere with divalent cation cross-linkers (e.g. zinc oxide) due to chelation. Add SHMP during the grind stage, before binder let-down, to minimise compatibility issues.

Question 3

How does SHMP compare to polyacrylate dispersants for mineral pigments?

Accepted Answer

SHMP offers a significant cost advantage and performs well with coarse to medium extenders (d50 > 2 µm) in moderate-solids systems. Polyacrylate dispersants are preferred for ultra-fine pigments, high-gloss formulations, or where long-term viscosity stability is critical, as SHMP can hydrolyse over time at elevated temperatures or extreme pH.

Appearance	White powder
Solubility	Fully soluble in water
Active Content	≥68% (as P2O5)
Recommended Dosage	0.1–0.5% on pigment weight
pH (1% solution, 25°C)	6.0–7.0

Sodium Hexametaphosphate Dispersant SHMP

Specifications

FAQ

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