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EX-2995 Polyurethane Prepolymer Based on TDI/Polycaprolactone Polyols Equivalent to ECP95A

Categories TDI Based Polyurethane
Supply Ability: 30000 Kilograms per Month
Appearance at 20°C: Waxy Solid
Model Number: EX-2995
Packaging Details: 200kg net per drum standard
Post Cure: 12-16 hours at 100°C
Chain Extender: MOCA
Demold Time: 30-50 minutes
Delivery Time: 7-15 working days
Product Name: TDI Based Polyurethane Prepolymer
Brand Name: EXCEEDCHEM
Mixing Ratio (PHR): 18.2-18.5
Tensile Strength: 50 MPa
Pot Life: 3-5 minutes
Hardness: 95 ± 2 ShoreA
Place of Origin: China
NCO Content: 6.2 ± 0.3%
R Value (NCO/OH): 1.05-1.1
MOQ: 960 Kilograms
Viscosity at 80°C: 700 ± 300 mPa·s
Certification: ISO 9001:2015
Payment Terms: T/T,L/C
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EX-2995 Polyurethane Prepolymer Based on TDI/Polycaprolactone Polyols Equivalent to ECP95A

EX-2995 Polyurethane Prepolymer Based on TDI/Polycaprolactone Polyols
EX-2995 is a high-quality prepolymer based on TDI/Polycaprolactone Polyols. As a waxy solid at room temperature, this prepolymer is purpose-formulated for casting polyurethane elastomer products with demanding mechanical performance requirements.
Product Overview
The product is characterized by high mechanical strength, excellent wear resistance, long service life, and easy processing characteristics. When cured with MOCA chain extender, EX-2995 delivers finished elastomers suitable for the most abrasive and high-load environments encountered in mining and heavy machinery applications.
Product Specifications
PropertyUnitEX-2995Testing Standard
Appearance (20°C)--Waxy SolidVisual
NCO Content%6.2 ± 0.3HG/T 2409
Viscosity (80°C)mPa*s700 ± 300GB/T 12009.3
Casting Processing Parameters
Process StepUnitHC-2995
Pre-heating Temperature°C70 ± 5
Pre-heating TimeHour4-6
Chain Extender--MOCA
R Value (NCO / Chain Extender)--1.05-1.1
Mix Prepolymer Temp.°C75-80
Mix Chain Extender Temp.°C110-120
Ratio (PHR)Parts per Hundred Resin18.2-18.5
Casting Mold Temp.°C100
Oven Temp.°C100
Pot LifeMinute3-5
Demold TimeMinute30-50
Post Cure (100°C)Hour12-16
Finished Part Properties -- EX-2995 / MOCA
PropertyUnitValueTesting Standard
Appearance (25°C)--Light Yellow ElastomerVisual
HardnessShoreA95 ± 2GB/T 531.1-2008
Densityg/cm³ (25°C)1.19GB/T 533-2008
100% ModulusMPa9.0GB/T 528-2009
300% ModulusMPa25.0GB/T 528-2009
Tensile StrengthMPa50GB/T 528-2009
Elongation at Break%372GB/T 528-2009
Angle Tear StrengthkN/m110GB/T 529-2008
DIN Abrasionmm³45GB/T 9867-2008
Resilience (Impact Rebound)%35GB/T 1681-2009
Test results based on a 100 g sample molded in a rectangular flat plate. Demolding time depends on part size and mold geometry; larger or complex parts require appropriately extended demolding time and post-cure duration.
Key Performance Advantages
  • High Mechanical Strength: 50 MPa tensile strength with 372% elongation delivers outstanding load-bearing capacity for heavy-duty industrial components.
  • Exceptional Wear Resistance: DIN abrasion of only 45 mm³ ensures prolonged service life in high-abrasion mining and machinery environments.
  • Superior Tear Resistance: 110 kN/m angle tear strength prevents crack propagation in dynamic seal, gasket, and roller applications.
  • Efficient Processing: 3-5 minute pot life and 30-50 minute demold time enable rapid production cycles for medium to large cast parts.
Step-by-Step Processing Guide
  1. Prepolymer Preparation: Pre-heat HC-2995 at 70-75°C for 4-6 hours until completely melted. Transfer to a clean, dry container, heat to 85-90°C, and degas under vacuum (-0.1 MPa) until no bubbles are visible on the material surface.
  2. Chain Extender Preparation: Weigh a quantitative amount of MOCA and heat to approximately 120°C until fully melted. Keep ready for use.
  3. Mixing: Control the degassed prepolymer temperature at 75-80°C. Add melted MOCA at a ratio of 18.2-18.5 PHR (per 100 parts prepolymer). Stir evenly within the pot life window. Pigments can be added together with the chain extender.
  4. Second Degassing: Perform a second vacuum degassing step within the pot life window, keeping degassing time under 1 minute until no obvious bubbles remain.
  5. Casting: Pour the mixed material into a preheated mold (100°C) coated with polyurethane-specific release agent. Avoid introducing bubbles. After bubbles float to the surface, remove them with flame treatment. For vulcanizer-molded parts, apply pressure before the surface loses tack but before full hardening.
  6. Demolding: Demold after 30-50 minutes. Larger parts require extended demolding time.
  7. Post-Curing: Place the demolded part in an oven at 100°C for 12-16 hours until full physical properties are achieved.
Storage & Handling Notes
  • Storage Conditions: Store in a cool, dry place away from moisture, high temperature, and direct light. Shelf life of unopened prepolymer is 12 months.
  • After Opening: Use as soon as possible; seal immediately after each use. If available, purge the container with N2 before resealing to prevent moisture contamination.
  • Metal Bonding: Bonding prepolymer to metal or other substrates requires surface treatment and primer coating. Consult the company's technical staff for guidance.
  • Safety: The prepolymer has a slight pungent odor. Ensure adequate ventilation in the working environment. Use appropriate protective equipment to avoid spills, contamination, and inhalation.
  • Disclaimer: All technical data and usage suggestions are based on our experimental conditions and working environment. It is the user's responsibility to test processing methods and finished part properties to verify suitability for their specific process and application.
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