Mining PU Cast Raw Material E3490 TDI PTMG Prepolymer
Mining PU Cast Raw Material E3490 TDI PTMG Prepolymer
Our E3490 TDI PTMG prepolymer is a core casting raw material paired with MOCA for producing durable mining PU screen panels, hydrocyclone liners and other wear parts.
This is TDI-terminated PTMG prepolymer of low viscosity, it allows to be processed at reduced temperaturefor the better heat stability. It enjoys a high performance.
It applies to make PU rods, castor wheels, PU pad, PU sheet, rubber roller, sieve plate, etc.
Technical Specifications
| NCO Content (%) | 4.2±0.2 |
| Density at 24℃ (g/cm3) | 1.09 |
| Viscosity at 85℃ (Mpa.s) | 750 |
| Appearance at 25℃ | White solid |
Operation introduction
| Ratio (Prepolymer/Moca) | 100/12.1 |
| Mix temperature/℃ (Prepolymer/Moca) | 85/120 |
| Gel time/min | 10 |
| Postcure (120℃)/h | 10 |
Physical Properties
| Hardness/ shore A | 90±2 |
| Tensile Strength/ Mpa | 33 |
| 100% Modulus/MPa | 7.5 |
| 300% Modulus/MPa | 14.1 |
| Elongation at break/% | 500 |
| Tear strength(without nick) / kN/m | 78 |
| Rebound/% | 54 |
| DIN Abrasion/mm3 | 39 |
Shelf life & Package
The storage time of original packing is 6 months at the above condition from the date of production.
20kg or 200kg per steel drum
Frequently Asked Questions (FAQ)
Q1: What is E3490 prepolymer?
A: E3490 is low-viscosity TDI-terminated PTMG prepolymer, the main A-component paired with MOCA to cast heavy-duty mining polyurethane wear parts.
Q2: Key mechanical advantages for mining use?
A: Shore A90 hardness, 33MPa tensile strength, 78kN/m tear strength, ultra-low DIN abrasion (39mm³), long service life against mineral slurry erosion.
Q3: Compatible with our CPU casting machines?
A: Fully fits 5~15kg/min & 10~30kg/min two-component casting machines for small & oversized mining PU parts.
Q4: Can we add color pigment?
A: Yes, color paste can be added via the machine’s color feeding unit without weakening wear resistance.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.