Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

NPU CORONATE HXR Isocyanate Curing Agent

NPU CORONATE HXR Isocyanate Curing Agent is a high-reactivity aliphatic polyisocyanate from the CORONATE® series by NPU Chemicals. Designed for premium two-component polyurethane coatings, it delivers exceptional weather resistance, gloss retention, and low VOC compliance. Its hexamethylene diisocyanate (HDI) trimer structure ensures rapid cure, excellent flexibility, and superior UV stability—ideal for automotive refinish, industrial maintenance, and aerospace applications requiring durable, non-yellowing finishes.
  • npu coronate hxr isocyanate curing agent_2a218361
  • npu coronate hxr isocyanate curing agent_2a218361

Features Of NPU CORONATE HXR Isocyanate Curing Agent

  1. High-reactivity aliphatic isocyanate offering excellent weather resistance and UV stability.

  2. Low-viscosity liquid formulation enabling easy handling, precise metering, and homogeneous mixing with polyol components.

  3. Non-yellowing performance ideal for topcoats and clear-coat applications requiring long-term gloss and color retention.

  4. Compatible with a broad range of hydroxyl-functional resins including acrylics, polyesters, and polyester-polyols.

  5. Meets stringent VOC regulations with negligible volatile organic compound emissions when formulated appropriately.

Typical Applications Of NPU CORONATE HXR Isocyanate Curing Agent

  1. Automotive OEM and refinish clearcoats and basecoat/clearcoat systems.

  2. Industrial maintenance coatings for metal and plastic substrates.

  3. High-performance architectural coatings for façades and exterior cladding.

  4. Precision coil coatings requiring rapid cure response and durable film formation.

  5. Specialty protective coatings for aerospace and rail transportation components.

Specifications Of NPU CORONATE HXR Isocyanate Curing Agent

Chemical TypeAliphatic polyisocyanate (hexamethylene diisocyanate-based trimer)
Product FormLiquid
AppearanceClear, pale yellow to colorless liquid
NCO Content (wt%)18.5 – 19.5%
Viscosity at 25°C (mPa·s)800 – 1,200
Density at 25°C (g/cm³)1.18 – 1.22
Flash Point (°C, closed cup)145 – 155
Storage StabilityStable for ≥12 months at 15–25°C in original sealed container


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