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

LAN-XESS UREPAN 640G Polyurethane Prepolymer

LANXESS UREPAN 640G is a high-reactivity aromatic polyurethane prepolymer from the UREPAN series, featuring low viscosity and excellent compatibility with fillers. Designed for cast elastomers and reaction injection molding (RIM), it delivers superior mechanical strength, abrasion resistance, and thermal stability. Ideal for demanding industrial applications requiring fast demolding and consistent performance.
  • lan xess urepan 640g polyurethane prepolymer_7f7f6eae
  • lan xess urepan 640g polyurethane prepolymer_7f7f6eae

Features Of LAN-XESS UREPAN 640G Polyurethane Prepolymer

  1. Highly reactive aromatic MDI-based prepolymer with controlled NCO content for precise formulation control.

  2. Excellent compatibility with polyester and polyether polyols, enabling broad system design flexibility.

  3. Low viscosity at processing temperatures (e.g., 60–70 °C), supporting easy handling, metering, and homogeneous mixing.

  4. Consistent batch-to-batch reproducibility meeting stringent LANXESS quality assurance standards.

  5. Optimized for fast-cure elastomer and microcellular foam applications without requiring high-temperature post-curing.

Typical Applications Of LAN-XESS UREPAN 640G Polyurethane Prepolymer

  1. High-performance polyurethane elastomers for industrial rollers, seals, and wear-resistant linings.

  2. Microcellular polyurethane foams used in automotive interior components and precision gasketing.

  3. Reaction injection molding (RIM) and structural RIM (SRIM) systems for rigid and semi-rigid parts.

  4. Two-component casting systems for vibration-damping pads and resilient mountings.

  5. Specialty adhesives and coatings requiring rapid green strength development and excellent substrate adhesion.

Specifications Of LAN-XESS UREPAN 640G Polyurethane Prepolymer

Chemical TypeAromatic MDI-based polyurethane prepolymer
Product FormLiquid
AppearanceClear to pale yellow, homogeneous liquid
NCO Content (wt %)Approx. 12.5–13.5%
Viscosity at 25 °C (mPa·s)1,800–2,500
Functionality (avg.)2.2–2.4
Primary ApplicationsElastomers, microcellular foams, RIM, castable systems
Key FeaturesReactivity control, low processing viscosity, high mechanical property potential


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