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

Wanhua Chemical HT-75B HDI Curing Agent

Wanhua Chemical HT-75B is a high-performance aliphatic HDI-based polyisocyanate curing agent from the HT series, offering excellent weather resistance, low viscosity, and rapid curing for premium polyurethane coatings and adhesives in automotive and industrial applications.
  • wanhua chemical ht 75b hdi curing agent_91fa5407
  • wanhua chemical ht 75b hdi curing agent_91fa5407

Features Of Wanhua Chemical HT-75B HDI Curing Agent

  1. High reactivity with hydroxyl-functional resins, enabling rapid room-temperature or low-bake curing.

  2. Excellent yellowing resistance and UV stability for long-term color retention in clear and light-colored coatings.

  3. Low viscosity and good compatibility with common polyols and acrylic resins, facilitating easy formulation and processing.

  4. Low monomer content and reduced volatility, contributing to improved workplace safety and lower VOC emissions.

  5. Consistent batch-to-batch performance ensured by stringent quality control and proprietary purification technology.

Typical Applications Of Wanhua Chemical HT-75B HDI Curing Agent

  1. Automotive OEM and refinish clearcoats requiring high gloss, hardness, and weatherability.

  2. Industrial maintenance coatings for metal substrates exposed to harsh environmental conditions.

  3. High-performance wood finishes used in premium furniture and interior architectural applications.

  4. Plastic coatings for automotive interior parts and consumer electronics housings.

  5. Two-component polyurethane systems for durable floor and concrete sealers.

Specifications Of Wanhua Chemical HT-75B HDI Curing Agent

Chemical TypeAliphatic isocyanurate-based HDI trimer
Product FormLiquid
AppearanceColorless to pale yellow transparent liquid
NCO Content (wt%)18.5–19.5%
Viscosity (mPa·s, 25°C)800–1200
Density (g/cm³, 25°C)1.21–1.24
Flash Point (°C, closed cup)135–145
Storage Stability≥12 months at <25°C in sealed container


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