Calcium magnesium carbonate, also known as dolomite, is a mineral compound that can be utilized in polymer applications for various purposes. Here are some common uses of calcium magnesium carbonate in polymers:

Filler in Thermoplastics and Thermosets

Like other mineral fillers, calcium magnesium carbonate can be used as a filler material in both thermoplastic and thermosetting polymer matrices. It helps to improve mechanical properties such as stiffness, strength, and dimensional stability of the polymer composite. Additionally, it can reduce material costs by displacing more expensive polymer resins.

Improvement of Impact Resistance

Incorporating calcium magnesium carbonate into polymers can enhance impact resistance, making the resulting composite materials more durable and suitable for applications where mechanical shock or impact is a concern, such as automotive parts, sports equipment, and packaging materials.

Enhancement of Heat Resistance

Calcium magnesium carbonate can improve the thermal stability and heat resistance of polymers. This is particularly beneficial in applications where exposure to high temperatures is expected, such as in automotive components, electronic enclosures, and industrial equipment.

Flame Retardancy

Depending on the specific formulation and treatment, calcium magnesium carbonate fillers can impart flame retardant properties to polymers, thereby enhancing their fire resistance. This is crucial for applications where fire safety standards must be met, such as in building materials, electrical enclosures, and transportation components.

Control of Shrinkage and Warpage

Incorporating calcium magnesium carbonate fillers into polymers can help to minimize shrinkage and warpage during processing and cooling. This improves the dimensional stability of the final molded or extruded parts, leading to better overall performance and aesthetics.