Low Free TDI Colorless Polyurethane Prepolymer Transparent Grade Shore A68-A93 For PU Roller Plate Bar
This TDI-based polyurethane prepolymer system is manufactured by ExceedChem with ISO 9001:2015 certified quality control. Our TDI prepolymers are produced using advanced polymerization technology ensuring consistent batch-to-batch performance and long-term reliability for industrial elastomer applications.
- Low Free TDI Content (<0.5%): Reduced monomeric TDI for safer handling, lower VOC emissions and environmentally conscious manufacturing
- Colorless Transparent Appearance: Crystal clear liquid form enables production of transparent or color-tinted finished products
- Polyether PPG Backbone: Good hydrolysis resistance and low temperature flexibility with stable processing characteristics
- Wide Hardness Range: Available from Shore A68 to A93 covering soft to medium-hard elastomer requirements
- Low Viscosity Processing: Easy handling viscosity at typical processing temperatures for efficient casting operations
Ideal for PU rollers, plates, bars, sealing rings, and any application requiring clarity, colorability, and lower environmental footprint. All products exhibit excellent abrasion resistance, water resistance, and reliable mechanical properties. Color can be adjusted by adding pigment to meet specific customer requirements.
- Preheat the prepolymer to 80-85℃ and maintain for vacuum degassing until all bubbles are removed
- Melt the curing agent (MOCA at 110-120℃ or use liquid E300 DMTDA at room temperature)
- Blend prepolymer with curing agent at the recommended ratio based on NCO content
- Vacuum degas the mixture again for 2-3 minutes
- Cast into preheated molds (100-110℃) and cure at 100℃ for 8-16 hours
- Post-cure at room temperature for 7 days for optimal properties
Available in 20kg/drum or 200kg/drum with nitrogen-sealed packaging. Store in a cool, dry place away from moisture and direct sunlight. If not used completely in one operation, refill with nitrogen gas before resealing. Shelf life is 6 months in original unopened packaging under recommended storage conditions.
| Polyol Type | Polyether Polyol (PPG) |
| Isocyanate | TDI 80/20 (Low Free Grade) |
| Hardness Range | Shore A68 - Shore A93 |
| Free TDI Content | <0.5% |
| NCO Content | 2.80% - 6.40% (±0.2%) |
| Appearance at 25℃ | Colorless transparent liquid |
| Viscosity at 85℃ | 200-500 mPa·s |
| Curing Agent | MOCA or E300 (DMTDA) |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.