Key Benefits of GCC in Adhesives & Sealants

Particle size distribution: The particle size distribution of GCC is a critical factor influencing its performance in adhesives and sealants. Fine particles (typically less than 1 micron) are preferred for applications requiring smooth surface finish and high opacity. Coarser particles (up to 10 microns) are used in applications where cost reduction and improved mechanical properties are prioritized. The optimal particle size distribution ensures uniform dispersion within the adhesive or sealant matrix, enhancing the overall properties of the product.

Surface treatment types: Surface treatment of GCC is essential to improve its compatibility with adhesive and sealant resins. Common treatments include stearic acid coating, which enhances the hydrophobicity of GCC, improving its dispersion in non-polar systems. Silane coupling agents are also used to enhance the bonding between GCC and the adhesive or sealant matrix, resulting in improved mechanical properties and durability. Proper surface treatment ensures better adhesion, reduced moisture absorption, and enhanced processing stability.

• Enhanced Bonding Strength: Improves adhesion to various substrates.

• Workability & Spreadability: Ensures even application and long-term durability.

• In construction adhesives, GCC improves rheology, making the adhesive easier to apply and spread, ensuring uniform adhesion. It also enhances mechanical strength and durability, which is crucial for structural applications.

• Best GCC grades: 2 μm, 3 μm, 5 μm for structural adhesives and tile bonding.

• Viscosity optimization: Helps maintain stability in high-performance adhesives.

• Filler efficiency: Reduces production costs while maintaining performance.

• Best GCC grades: 3 μm, 5 μm, 10 μm for better processability in large-scale production.

• Improved flexibility & crack resistance: Ensures long-term protection.

• Moisture resistance: Prevents water penetration in sealing applications.

• In silicone sealants, GCC controls viscosity and increases density, resulting in improved sealing performance and longer shelf life. The high whiteness of GCC also contributes to the aesthetic quality of the sealant, making it suitable for visible joints and seams.

• Best GCC grades: 1 μm, 2 μm, acid-coated for enhanced waterproofing properties.

• Better adhesion & strength: Enhances wood bonding capabilities.

• Increased workability: Ensures smooth application and leveling.

• Best GCC grades: 2 μm, 3 μm, acid-coated for improved dispersion in wood adhesives.