Thixotropic agent in electrically conductive colour pastes without affecting the electrical conductivity
When using a thixotropic agent in electrically conductive color pastes, it is essential to ensure that it does not affect the electrical conductivity. The choice of an appropriate thixotropic agent should avoid components that may insulate or encapsulate conductive fillers such as carbon nanotubes, silver powder, or graphene. Here are some suitable thixotropic agents for this application:
Organoclay (Modified Montmorillonite)
Suitable for non-polar and moderately polar systems
Provides excellent thixotropic properties without significantly affecting the dispersion and conductive network of fillers
Polyurea-Based Thixotropic Agents (Polyurea/Polyurethane Rheology Modifiers)
Suitable for solvent-based systems, offering reversible thixotropic structures
Effective for high-solid-content pastes with minimal impact on conductivity
Fumed Silica (Hydrophobic Modified)
Applicable for both solvent-based and water-based systems
Forms a hydrogen-bonded network to enhance thixotropy and improve storage stability
Suitable for solvent-based systems, particularly those with higher polarity
Provides excellent anti-settling properties without significantly reducing electrical conductivity