Polyester TDI Based Polyurethane Prepolymer Oil Resistant High Mechanical Strength For Oil Seal PU Screen

This TDI-based polyurethane prepolymer system is manufactured by ExceedChem with ISO 9001:2015 certified quality control. Our advanced polymerization technology ensures consistent batch-to-batch performance and long-term reliability for industrial elastomer applications.

• Polyester Polyol Backbone: Superior mechanical strength, cut resistance and tear resistance compared to polyether systems
• Excellent Oil Resistance: Outstanding resistance to mineral oils, hydraulic fluids and hydrocarbon solvents
• High Mechanical Performance: Excellent tensile strength, modulus and load-bearing capacity
• Abrasion Resistance: Exceptional wear resistance suitable for demanding industrial environments
• Heat Resistance: Better thermal stability than polyether-based systems at elevated temperatures

• Oil seals and PU screens
• Machine parts and industrial rollers
• Applications requiring prolonged oil or chemical exposure
• Components needing excellent abrasion and water resistance

Color can be adjusted by adding pigment to meet specific customer requirements.

1. Preheat the prepolymer to 80-85℃ and maintain for vacuum degassing until all bubbles are removed
2. Melt the curing agent (MOCA at 110-120℃ or use liquid E300 DMTDA at room temperature)
3. Blend prepolymer with curing agent at the recommended ratio based on NCO content
4. Vacuum degas the mixture again for 2-3 minutes
5. Cast into preheated molds (100-110℃) and cure at 100℃ for 8-16 hours
6. 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.