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Brand Name : | EXCEEDCHEM |
Model Number : | TDI-80/Polyether Polyurethane Prepolymer Shore A78-80 |
Certification : | ISO9001:2008 |
Price : | FOB Qingdao usd3.0/kg |
Payment Terms : | L/C, T/T |
Supply Ability : | 3000mt/month |
Delivery Time : | 5-8 work days |
Shore A78 TDI 80 Polyurethane Prepolymer Sealing O-Rings Raw Material
1. Description
This is a TDI-80 based polyether polyurethane prepolymer.
2. Characteristics
3. Applications
4. Typical properties
Type | Appearance | Viscosity(mPa.s/85℃) | NCO% | Packing(kg/drum) |
Liquid | 250-280 | 3.5-3.7 | 20/200 |
5. Operating Procedure
First, the prepolymer should be preheated in 80-85℃. Second, after vacumming, the prepolymer is to be mixed with melting MOCA evenly. Third, with degassing, casting into mould, and vulcanization,and then demould. Lastly, the finished product should be post vulcanized.
6. Reaction parameters
Item | MOCA (%) | Gel time(min) | Mixing temperature(℃) | Post vulcanization(h) |
Specification | 10-10.3 | 5-6 | 85/120 | 10 |
7. Finished products properties
Item | Hardness(Shore A) | Tensile strength(MPa) | Tear strength(KN/m) | Rebounding(%) |
Physical properties | 78-80 | 9-10 | 40-45 | 48 |
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