Qingdao Exceed Fine Chemicals Co.,Ltd
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White solid MDI/PTMG Prepolymer Hardness 95
1.Description
This is an MDI-terminated PTMG prepolymer of low viscosity and easy processing. It enjoys a high performance and high abrasion resistance.
2. Application
It applies to make PU rods, castor wheels, PU pad, PU sheet, rubber roller, sieve plate, etc.
3. Product Specification
| NCO Content (%) | 9.0±0.2 |
| Density (25℃)/(g/cm3) | 1.12 |
| Viscosity at 85℃ (Mpa.s) | 750 |
| Appearance at 25℃ | White solid |
4. Operation introduction
| Ratio (Prepolymer/1,4BDO) | 100/7.8 |
| Mix temperature/℃ (Prepolymer/1,4BDO) | 80/40 |
| Gel time/min | 7 |
| Postcure (110℃)/h | 48 |
5. Physical Properties
| Hardness/ shore A | 95±1 |
| Tensile Strength/ Mpa | 45 |
| 100% Modulus/MPa | 12.6 |
| 300% Modulus/MPa | 18.9 |
| Elongation at break/% | 500 |
| Tear strength (without nick) / kN/m | 130 |
| Tear strength (with nick) / kN/m | 51 |
| Rebound/% | 55 |
| DIN Abrasion(mm3) | 44 |
6. Shelf life
The storage time of original packing is 6 months at the above condition from the date of production.
7. Package
20kg or 200kg per steel drum
8. Safety
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses or goggles when handling this product.
If Contact Occurs:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. Seek medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes, contact a physician.
Ingestion: If swallowed, contact a physician immediately. Remove stomach contents by gastric suction or induce vomiting only as directed by medical personnel. Never give anything by mouth to an unconscious person.