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WP-210 White Ceramic Microspheres consist of thick-walled, hollow microspherical particles of alkali alumino-silicate ceramic, engineered as a functional microfiller for multiphase formulations including paints/coatings, polymer composites, sealants, and cementitious matrices.
The grade is designed to deliver a controlled balance of optical whiteness, reduced bulk density, high intrinsic hardness, and high-temperature dimensional stability, arising from its ceramic composition and narrow spherical morphology.
From a microstructural and rheological standpoint, the near-spherical geometry provides a low specific surface area and promotes efficient particle packing with reduced interparticle friction. This behavior translates to improved dispersion stability, flow/leveling, and sprayability, while enabling partial substitution of irregular extenders with potential binder-demand reduction at equivalent or higher solids loading. The ceramic phase is chemically inert, non-combustible, and broadly compatible with both aqueous and solvent-based binder systems.
Ceramic Microspheres, Aluminosilicate Microspheres, Ceramic microballoons
93924-19-7
300-212-6
2621.90.0000
Not regulated as Dangerous Goods
Free-flowing powder
1.12-1.15
Ceramic microspheres are high-heat stable upto 1200–1400 °C
WP-210 White Ceramic Microspheres are compatible with:
Architectural interior & exterior paints
Flat, matte & low-sheen coatings
Industrial protective coatings
Anti-corrosion primers & topcoats
Roof coatings & elastomeric paints
Waterproofing compounds
Repair mortars and grouts
Sealants & joint fillers
Lightweight cementitious systems
Thermoset & thermoplastic composites
Synthetic stone & engineered surfaces
Adhesives & caulks
Thermal insulation coatings
Fire-resistant systems
Lightweight fillers for performance materials
| Property | Typical Value |
|---|---|
| Chemical Composition | Alkali Alumino-Silicate Ceramic |
| Particle Structure | Hollow, thick-walled spheres |
| True Density | ~2.4 g/cc |
| Bulk Density | ~1.5 g/cc |
| Median Particle Size (D50) | ~4 microns |
| Maximum Particle Size | ~24 microns |
| Whiteness (Hunter L) | ≥ 95 |
| Mohs Hardness | ~7 |
| Crush Strength | > 60,000 psi |
| pH (slurry) | 9.0 – 12.0 |
| Softening Point | ~1,020 °C |
| Refractive Index | ~1.53 |
| Thermal Conductivity | ~2.3 W/m·K |
| UV Transparency | Transparent down to ~250 nm |
| Form | Free-flowing white powder |
In flat, matte and low-sheen decorative emulsions, WP-210 helps minimize shine patches created by rubbing, cleaning, or furniture contact. Its high ceramic hardness and uniform spherical geometry support a more wear-stable surface, reducing local polishing and maintaining an even appearance over time.
WP-210 can help control gloss by contributing to controlled micro-texture at the film surface without causing major viscosity increase, supporting consistent low-sheen finishes.
Ceramic microspheres are intrinsically hard and resist breakdown under abrasion, improving scrub life versus softer, irregular extenders.
Spherical particles help reduce soil entrapment compared to angular fillers, improving wipe-clean performance and surface uniformity after washing.
“Micro ball-bearing” behavior reduces interparticle friction, improving flow, leveling and sprayability—useful in decorative paints where finish and application are critical.
Low surface-area-to-volume ratio enables efficient packing, helping maintain viscosity at higher filler loading and potentially reducing binder demand.
Hollow spheres reduce paint density and can contribute to improved coverage per kg, supporting cost and logistics benefits.
Supports bright, clean shades and appearance-critical decorative systems.
WP-210 White Ceramic Microspheres are inorganic, chemically inert ceramic materials and are generally regarded as safe for handling in industrial environments.
Non-flammable and non-combustible
Does not decompose or emit hazardous fumes under normal conditions of use
Low chemical reactivity with common binders, solvents, and additives
Avoid generation of excessive dust during handling and transfer
Use appropriate personal protective equipment (PPE) such as safety goggles, gloves, and dust masks/respirators when handling powders
Ensure adequate ventilation in processing areas
Wash hands thoroughly after handling
Refer to the Safety Data Sheet (SDS) for detailed occupational health, exposure limits, and regulatory information.
Under recommended storage conditions, WP-210 maintains its physical and performance characteristics for extended periods.
25 kg BOPP laminated bags
Jumbo / bulk bags