Isocyanate-Free Crosslinkers for 2K Coating Systems
Safer, label-free hardeners for durable, fast-curing industrial coatings.
Why Move Beyond Isocyanates?
2K PU coatings are the industry standard for durability, chemical resistance and protection, relying on polyol–isocyanate binder systems. The market now seeks isocyanate-free binders with similar performance, but current sustainable options such as organic cyclic carbonates remain expensive and not available at scale.
- Toxicity – Isocyanates are harmful, causing sensitization and long-term health issues.
- Regulatory Burden – REACH and OSHA restrictions raise system costs..
- Handling Challenges – Reactive, viscous isocyanates demand strict handling and training.
- Regulatory Pressure – Stricter monomer limits demand safer, compliant solutions.
- Limited Innovation – Few raw materials restrict compatibility and sustainable solutions.
Our Solution: XenCure™ A & XenRes™ H
Siloxene hardeners are alternatives to classical isocyanates and expensive NIPU systems. These silane hardeners create durable silicate-organic hybrid polymers through moisture and alcohol condensation, with only minor process changes needed. They offer an easy drop-in replacement that maintains high coating performance without the hazards of isocyanates.
- Fast-reacting and durable
- Label-free, non-toxic product
- Excellent adhesion to mineral/metal substrates
- UV & weathering durability
- Adjustable hardness (soft to very hard)
- Polyol compatibility (acrylic, polyester, fluorinated, alkyd)
Performance Advantages
Non-Hazardous
Isocyanate-free, label-free chemistry improves workplace safety and simplifies compliance.
Fast Cure
Moisture-assisted crosslinking with short tack-free times to boost line productivity.
Durability
Excellent adhesion plus UV/weathering resistance for long service life outdoors.
Typical Applications
- Direct-to-metal (DTM) primers & topcoats
- Coil & can coatings and other high-throughput industrial applications
- Protective coatings for steel, aluminum, concrete or ceramics
- Anti-graffiti or easy-to-clean coatings
- Paints and varnishes for architectural and infrastructure projects
