The biomedical advantages of a polystyrene surface are combined with a low effective density in a new class of microspheres. Polybead® Hollow Microspheres are spherical styrene / acrylic beads supplied in suspension. A relatively dense shell of a polystyrene based copolymer is formed around a void in the particle. Sphere voids are water-filled in the as-supplied 5% solids aqueous suspension, and the water-filled particle will have an effective density near 1.0 g/cm³. Water is lost from the void upon drying as the particles are slightly porous. This results in a hollow particle with a shell approximately 0.10µm thick. Surfactants on the surface of the spheres help stabilize the particles.

Composition: Styrene / acrylic

Diameter: 0.40µm

Effective Density: ~1.0 g/cm³

MSDS / Technical Data Sheets / Product Literature

• msdsMaterial Safety Datasheet 23567 (PDF)
• dataData Sheet #784
• litPolymer Microspheres

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