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Shore A78 TDI 80 Polyurethane Prepolymer Sealing O-Rings Raw Material

Categories TDI Based Polyurethane
Brand Name: EXCEEDCHEM
Model Number: TDI-80/Polyether Polyurethane Prepolymer Shore A78-80
Certification: ISO9001:2008
Place of Origin: China
MOQ: 1mt
Price: FOB Qingdao usd3.0/kg
Payment Terms: L/C, T/T
Supply Ability: 3000mt/month
Delivery Time: 5-8 work days
Packaging Details: 20kg/drum; 200kg/drum
NCO%: 2.80-2.95
MOCA%: 8-8.3
Base: TDI-80/Polyether
Hardness: Shore A78-80
Color: colorless liquid
Application: Roller, Plate and bar, Sealing ring
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Shore A78 TDI 80 Polyurethane Prepolymer Sealing O-Rings Raw Material

Shore A78 TDI 80 Polyurethane Prepolymer Sealing O-Rings Raw Material


1. Description


This is a TDI-80 based polyether polyurethane prepolymer.


2. Characteristics

  • Water resistance
  • Low temperature resistance
  • Mold resistance

3. Applications

  • Roller
  • Plate and bar
  • Sealing ring

4. Typical properties

TypeAppearanceViscosity(mPa.s/85℃)NCO%Packing(kg/drum)
Liquid250-2803.5-3.720/200

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


ItemMOCA (%)Gel time(min)Mixing temperature(℃)Post vulcanization(h)
Specification10-10.35-685/12010

7. Finished products properties


ItemHardness(Shore A)Tensile strength(MPa)Tear strength(KN/m)Rebounding(%)
Physical properties78-809-1040-4548

Cast polyurethane elastomers provide advantages such as elasticity, a long service life and excellent wear resistance. Our polyurethane hot cast elastomers based on toluene diisocyanate (TDI) can be formulated with a wide range of mechanical properties including different hardness levels thanks to polyester- or polyether-based prepolymers.
Quality Shore A78 TDI 80 Polyurethane Prepolymer Sealing O-Rings Raw Material for sale
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