Hollow Glass Microspheres (HL Series)
Número CAS: 65997-17-3
Alkali-lime borosilicate hollow glass microspheres (HL15–HL60S), true density 0.13–0.63 g/cm³, isostatic crush strength 500–18,000 psi, median particle size (d50) 35–80 μm. Widely used in thermal insulation coatings, oil well cementing, lightweight composites, automotive putty, and buoyancy materials.
Especificaciones Técnicas
| color | White to off-white free-flowing powder |
| composition | Alkali-lime borosilicate glass |
| true density | 0.13 – 0.63 g/cm³ |
| crush strength | 500 – 18,000 psi (3.4 – 124 MPa) |
| softening point | ≥ 600 °C |
| moisture content | ≤ 0.3% |
| particle size d50 | 35 – 80 μm |
| thermal conductivity | 0.05 – 0.065 W/m·K |
Aplicaciones
- Thermal insulation coatings
- Oil & gas well cementing and drilling fluids
- SMC/BMC lightweight composites
- Automotive body putty and fillers
- Deep-sea buoyancy modules
- Structural adhesives and sealants
- Emulsion explosives and sensitizers
- Modified engineering plastics
- Syntactic foam for subsea pipelines
- Low-density cementitious grouts
Características Principales
- Ultra-low density reduces part weight by 20–40%
- High isostatic crush strength for demanding environments
- Excellent thermal insulation (λ ≈ 0.05 W/m·K)
- Chemically inert — resistant to acids, alkalis, and solvents
- Spherical morphology improves flowability and reduces viscosity
- Broad grade range (HL15–HL60S) for application-specific tuning