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

LAN-XESS UREPAN 643G Polyurethane Prepolymer

LANXESS UREPAN 643G is a high-reactivity aromatic polyurethane prepolymer from the UREPAN series, featuring low viscosity and excellent compatibility with polyols. Designed for demanding RIM and casting applications, it delivers superior mechanical strength, thermal stability, and fast demolding. Ideal for automotive parts, industrial rollers, and elastomeric components requiring precision and durability.
  • lan xess urepan 643g polyurethane prepolymer_1a82aabc
  • lan xess urepan 643g polyurethane prepolymer_1a82aabc

Features Of LAN-XESS UREPAN 643G Polyurethane Prepolymer

  1. Highly reactive aromatic isocyanate-terminated prepolymer based on MDI chemistry.

  2. Optimized viscosity for easy processing in casting, coating, and reaction injection molding (RIM) systems.

  3. Excellent mechanical properties retention after aging and exposure to humidity.

  4. Consistent batch-to-batch reproducibility meeting stringent Lanxess quality control standards.

  5. Compatible with common polyol blends and catalysts used in thermoset polyurethane formulations.

Typical Applications Of LAN-XESS UREPAN 643G Polyurethane Prepolymer

  1. Industrial elastomeric rollers and wheels requiring high abrasion resistance.

  2. Automotive suspension bushings and vibration-damping components.

  3. Heavy-duty mining and material handling equipment linings.

  4. Sealants and grouts for infrastructure and civil engineering applications.

  5. High-performance coatings for corrosion protection on metal and concrete substrates.

Specifications Of LAN-XESS UREPAN 643G Polyurethane Prepolymer

Chemical TypeAromatic isocyanate-terminated polyurethane prepolymer
Product FormLiquid
AppearanceClear to pale yellow viscous liquid
NCO Content (wt %)11.8 – 12.2
Viscosity at 25°C (mPa·s)1,200 – 1,800
Functionality~2.0
Primary ApplicationsElastomers, castable systems, RIM, industrial coatings
Key FeaturesHigh reactivity, low moisture sensitivity, excellent green strength


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