There is a Specialty Minerals Inc. (SMI) nano, ultrafine or fine precipitated calcium carbonate (PCC) which can improve the rheological, application and mechanical properties of your sealants. They are widely used as the thixotrope in a broad spectrum of automotive and construction products, including acrylic and PVC plastisols, polysulfides, polyurethanes, silicones and modified silicones, silyl terminated polyethers, butyl and other elastomerics, as well as in water-bornes.
Precipitated Calcium Carbonate Performance in Sealants
The selector chart below provides general guidelines about which SMI PCC to use in a particular sealant type and application. To help understand why a particular PCC should be used, click on one of the links to read more about them:
- PCC basics: types of PCCs (nano, ultrafine, fine, medium) and the functions they impart to sealants, PCC rheological structure and how it is built, why some PCCs are coated, the effect of dispersion work done on efficiency and stability, and how to adjust extrusion rate with the PCC / GCC (ground calcium carbonate) ratio.
- PCC properties: effects of particle size, degree of hydrophobicity, equilibrium moisture, degree of shear thinning, and adjusting extrusion rate by changing the PCC used.
Which Specialty Minerals Precipitated Calcium Carbonate to use?
As can be seen, there are a number of factors which affect the selection of a PCC to use in a particular formula. Consider the base polymer, how the product is to be applied, whether it is a one or two component sealant, whether moisture cured, whether drying the PCC is a problem or not, and what type of dispersion equipment is available in the factory. The location where SMI manufactures the PCCs may also play a role. These are the SMI products recommended. For more detail, go to the webpage for the sealant or adhesive type of interest.
Click on a polymer name to read about SMI PCCs in that type of sealant. Click on a product’s name to download the technical data sheet for the product.
Learn more:
- SMI precipitated calcium carbonates (PCCs) for adhesives and sealants
- Choosing the right precipitated calcium carbonate (PCC) for a sealant application: PCC property effects.
- SMI minerals used in construction sealants
- SMI minerals used in automotive sealants
- SMI products used in adhesives
- SMI minerals in automotive uses. See the parts of your car that may contain a Specialty Minerals product.
- SMI minerals in housing and construction. See the products used to build your home or in your home that may contain a Specialty Minerals product.
- SMI minerals in acrylic plastisol sealants
- SMI minerals in butyl and other elastomeric sealants
- SMI minerals in polysulfide sealants
- SMI minerals in PVC plastisol sealants
- SMI minerals in silicone sealants
- SMI minerals in silyl terminated polyether (STPE) sealants
- SMI minerals in urethane sealants
- SMI minerals in water-based sealants
- Download a product’s technical data sheet or MSDS
- Request a sample
- What is Precipitated Calcium Carbonate (PCC)? A mineral introductory webpage.
- What is Nano Precipitated Calcium Carbonate (PCC)? A mineral introductory webpage.
- About Specialty Minerals Inc.
- Quality and ISO at Specialty Minerals
