3M™ Glass Bubbles K20 have a density of 0.2 g/cc and an isostatic crush strength of 500 psi. The general purpose K Series glass bubbles are the most economical 3M glass bubbles.
Application Guide
Listed below are key applications for K20 glass bubbles. Documents specific to the application are listed to the right.
Density Reducing Agents for Buoyancy
3M Glass Bubbles K20 are used extensively in shallow water buoyancy applications. Their low density (0.20 g/cc) provides reliable buoyancy, and their high isostatic strength makes them an ideal choice when processing or buoy depth requires more strength. And, like all 3M glass bubbles, K20 bubbles are compatible with polyurethane, polypropylene and epoxy, and are virtually insoluble in water.
Industrial Explosives
The most versatile glass bubble, K20 bubbles are ideal for use in bulk emulsion, packaged emulsion, water gel and slurry explosives. Their high-strength provides protection against dead pressing while their low density provides high velocity of detonation (VOD).
True density: 0.20 g/cc
Target crush strength (90% survival): 500 psi
High fragmentation
Inert, non-coalescing particles provide consistent performance over time
Paints and Coatings
3M glass bubbles offer a variety of benefits to light weight, high-build elastomeric roof coatings, anti-condensation coatings, etc. Here are some of the benefits:
Lower viscosity, improved flow
Increased filler loading, reduced cost
VOC reduction
Chemical stability and inertness
Reduced dielectric constant
Thermal conductivity reduction
Temperature resistance
Additional Information
3M glass bubbles K20 are used extensively in shallow water buoyancy applications. Their low density (0.20 g/cc) provides reliable buoyancy, and their high isostatic strength makes them an ideal choice when processing or buoy depth requires more strength. And, like all 3M glass bubbles, K20 bubbles are compatible with thermoset resins like polyurethane and epoxy, and are virtually insoluble
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