In the manufacture of adhesives and sealants, lime-based or mineral fillers such as calcium carbonate (CaCO₃) are essential components of modern formulations. They influence viscosity, improve mechanical stability, ensure uniform processing and contribute to cost optimisation.
Coated variants of precipitated calcium carbonate (PCC) are used as rheology modifiers in a variety of sealants, particularly in PVC plastisol formulations used in the automotive industry. Due to their easy dispersibility, high yield point and low viscosity, they greatly simplify the development of new formulations.
The products of the Calmit Group are specially tailored to the requirements of the adhesive and sealant industry – from SMP systems, PU adhesives and silicone sealants to dispersion adhesives.
Areas of application for adhesives and sealants
In dispersion and construction adhesives, calcium carbonate is used as a filler to specifically control viscosity, optimise rheological properties and improve adhesion. Dolomite products are used in particular in SMP and PU systems, where they ensure increased mechanical strength, stable edge quality and improved thermal resistance. For silicone and acrylic sealants, lime products offer advantages in terms of volume stability, process control during processing and reduction of shrinkage. In hot melt and reactive adhesive systems, calcium carbonate contributes to temperature resistance, improved flowability and consistent formulation. In addition, natural fillers enable a reduction in volatile organic compounds (VOCs), thus supporting the development of sustainable formulations with a positive environmental balance.
Product solutions – tailored to adhesives and sealants
Are you developing adhesives or sealants and looking for high-quality, reliable functional fillers? Our sales staff will be happy to advise you on the right products.
- Calcium carbonate and mineral fillers with defined grain structure for dispersion adhesives, construction adhesives and sealants.
- High-purity calcium oxides/hydroxides (fine lime, micronised lime, hydrated lime) for special formulations with specific requirements in terms of reactivity and pH control, and as drying agents in various formulations of adhesives and sealants.
- Precipitated calcium carbonate (Calcprec PR) with precise particle distribution – ideal for PU systems, SMP adhesives and silicone sealants.
