In thermoset systems, Omya Calcium Carbonates benefit in particular unsaturated polyester resins (UP) in bulk or sheet molding compounds (BMC /SMC) where calcium carbonate levels are usually very high.
A high level of Omya Calcium Carbonates in thermoset resins allows substantial cost savings and improves significantly the mechanical properties like shrinkage and dimensional stability. Other thermoset systems such as epoxy or melamine resins also achieve cost and performance benefits from using our products.
Our technical specialists support producers to select the appropriate type of Calcium Carbonate to optimize paste viscosity during processing while taking into consideration the packing density effect at very high loadings. For applications requiring an ultra-smooth surface such as “Class A" in the automotive, there is a broad range of high-quality fine grades.