Calcium aluminium silicate, often referred to as calcium aluminosilicate or calcium aluminate silicate, is a compound commonly used as a filler or reinforcement material in polymers. Here’s how it is typically used in polymer applications:


Calcium aluminium silicate can act as a reinforcing filler in polymer matrices such as thermoplastics (e.g., polyethylene, polypropylene) or thermosets (e.g., epoxy resins). It enhances mechanical properties like tensile strength, stiffness, and dimensional stability of the polymer composite.

Improvement of Thermal Properties

Incorporating calcium aluminium silicate into polymers can improve their thermal stability and resistance to high temperatures. This is particularly useful in applications where heat resistance is important, such as automotive parts, electrical insulation, and aerospace components.

Flame Retardancy

Certain types of calcium aluminium silicates possess inherent flame retardant properties. When added to polymers, they can help enhance the fire resistance of the composite material. This is critical in applications where fire safety is a concern, such as building materials and electronics housings.

Electrical Properties

In some cases, calcium aluminium silicate fillers can enhance the electrical properties of polymers, such as dielectric strength and insulation properties. This makes them suitable for electrical and electronic applications.

Chemical Resistance

Depending on the specific formulation and surface treatment, calcium aluminium silicate fillers can enhance the chemical resistance of polymers, making them suitable for applications where exposure to chemicals or harsh environments is a concern.