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CALCOFILL HP80 Calcium Carbonate Filler
CALCOFILL HP80 High-Performance Calcium Carbonate Filler
CALCOFILL HP80 is a high-purity, double-coated calcium carbonate filler designed for use with epoxy resins, polyurethane systems and a wide range of polymer and industrial applications.
With high whiteness, low oil absorption and excellent dispersion, CALCOFILL HP80 is ideal for increasing bulk, controlling viscosity and improving the consistency of filled resin systems. Its fine particle distribution allows it to incorporate smoothly into resin while producing a dense, uniform mixture.
The double stearic-acid surface treatment improves compatibility with polymer systems and assists dispersion, making CALCOFILL HP80 particularly suitable for epoxy compounds, potting systems, adhesives, repair compounds, casting systems and general-purpose filled formulations.
Key Features
- High purity calcium carbonate – minimum 99.5% CaCO₃
- High whiteness – L* 97.0
- Double coated for improved compatibility and dispersion
- Stearic acid surface treated
- Low oil absorption
- Fine particle size – d₅₀ approximately 3.5 µm
- d₉₇ approximately 14 µm
- Excellent dispersion into epoxy and polymer systems
- Helps increase body and control viscosity
- Suitable for high filler-loading formulations
- Economical way to increase solids content and bulk
- Fine white powder for consistent formulation and processing
Typical Applications
CALCOFILL HP80 is suitable for use in:
- Epoxy resin formulations
- Electrical potting and encapsulation compounds
- Structural adhesives
- Concrete repair compounds
- Gap-filling and bonding systems
- Casting resins
- Marine compounds
- Industrial coatings
- Polymer compounds
- General industrial filled resin systems
CALCOFILL HP80 can be incorporated into the resin component to produce anything from lightly filled, free-flowing systems through to heavily filled compounds and pastes, depending on the loading level and base resin viscosity.
Typical Properties
| Property | Typical Value |
|---|---|
| Chemical Name | Calcium Carbonate |
| Appearance | Fine White Powder |
| CaCO₃ | 99.5% minimum |
| Whiteness (L*) | 97.0 |
| Median Particle Size (d₅₀) | 3.5 µm |
| d₉₇ | 14 µm |
| Surface Treatment | Stearic Acid |
| Coating | Double Coated |
Mixing with Epoxy Resin
Add CALCOFILL HP80 gradually to the resin while mixing thoroughly to achieve an even dispersion. Increasing the filler loading will progressively increase the body and viscosity of the mixture.
Lower additions can be used where increased solids and moderate viscosity adjustment are required, while higher loadings can produce dense, heavily filled compounds suitable for casting, bonding, potting and repair applications.
For high filler loadings, a suitable high-torque mechanical mixer or disperser is recommended. Avoid excessive mixing speeds that may introduce unnecessary air into the formulation.
CALCOFILL HP80 can also be used alongside other fillers such as fumed silica when additional thixotropy, sag resistance or paste consistency is required.
Available Sizes
5 Litre • 10 Litre • 20 Litre
CALCOFILL HP80 is packed in convenient pails for workshop, trade and industrial use.
Storage: Store in a cool, dry place. Keep the container securely closed when not in use and protect the product from moisture and contamination.
