SPHERON
All applications Paints and coatings

Aluminosilicate microspheres for paints and coatings

Hollow spherical particles can reduce formulation density and support targeted application properties. Performance depends on particle range, dosage and compatibility with the complete binder and additive system.

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Industrial coating application using SPHERON aluminosilicate microspheres
Paints and coatings

The role of microspheres in the formulation

Fine fractions are usually the starting point for thin layers, where maximum particle size must match the coating thickness and dosing equipment clearance. Broader particle ranges can be considered for thicker compounds and textured coatings.

Comparative trials should use the same volume loading. Evaluate viscosity, flow, surface finish, adhesion, mechanical resistance and particle integrity under the intended mixing and application conditions.

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Recommended starting products

The final grade must be validated in the target formulation and process. These products provide a practical starting point for trials.

SPH-200E — 63–200 µm
Series E
Aluminosilicate microsphere

SPH-200E — 63–200 µm

A controlled 63–200 µm E-series grade with a concentrated fine-to-medium particle-size distribution for coatings and composites.

Why this grade

The controlled 63–200 µm range and 0.35–0.44 g/cm³ bulk density suit coating trials that require fewer very fine particles.

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SPH-150E — 0–150 µm
Series E
Aluminosilicate microsphere

SPH-150E — 0–150 µm

A fine 0–150 µm E-series grade for formulations where a smaller maximum particle size is required.

Why this grade

The fine 0–150 µm range and 0.36–0.44 g/cm³ bulk density suit trials in thin coatings with a grey colour profile.

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SPH-300A — 0–300 µm
Series A
Aluminosilicate microsphere

SPH-300A — 0–300 µm

A versatile 0–300 µm A-series grade with a white to light grey color profile.

Why this grade

The broader 0–300 µm range and 0.36–0.42 g/cm³ bulk density support initial trials in thicker compounds and layers.

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SPH-150A — 0–150 µm
Series A
Aluminosilicate microsphere

SPH-150A — 0–150 µm

A fine 0–150 µm A-series grade for formulations requiring a smaller maximum particle size and lighter color.

Why this grade

The 0–150 µm range, light colour and 0.36–0.44 g/cm³ bulk density provide a starting point for thin, light-coloured formulations.

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