Hydrous kaolin for water-based adhesives
Water-based adhesive (WBA) formulations tend to utilize two types of hydrous kaolin: Low viscosity adhesives contain coarse primary kaolins. High viscosity adhesives contain secondary fine kaolins. Key benefits of hydrous kaolins are improved rheology, wet tack and binder consumption per square meter.
Calcined kaolin for moisture-cured high modulus polyurethane formulations
Calcined kaolin is an anhydrous aluminum silicate produced by calcining fine hydrous kaolin in controlled conditions to temperatures exceeding 1000 oC. The passivated aluminum-silicate surface makes it a value-added additive for moisture-curing elastic bonding materials particularly for high reinforcement in one- and two-component polyurethane formulas.
- Exceptional dispersion
- Improved drying time, increasing throughput
- Rheology modification - reducing slump
- Improved cohesive strength
- Enhanced tear resistance and impact strength
- Improved flow, penetration and adhesion (especially in starch and synthetic resin systems)
- Good acid resistance
- Improved dimensional stability
- Improved barrier properties
- Hydrite® SB100 and Hydrite SB60 beneficiated high aspect ratio recommended for water-based adhesives and sealants
- Polwhite® medium particle recommended for pressure-sensitive adhesives (PSA)
- Argirec® grades are ideal for water-based adhesives such as polyvinyl alcohol
- Polestar® calcined kaolin recommended for polyurethane systems
- Polarite® surface modified kaolin for moisture sensitive applications
We offer a full range of custom formulation and technical and process support services to help you match the right mineral grade to your application requirement.