Todi

A versatile additive for improving mechanical and chemical properties

Urethane elastomers have various advantages when compared with rubber, plastic and metal. This is especially true in regard to the urethane elastomers made using our product Tolidine diisocyanate (TODI). TODI-based elastomers offer excellent heat and hydrolysis resistance, along with superior mechanical properties.

Concerning the manufacturing point of view, due to its longer pot life, TODI-based prepolymer is easier to handle in comparison to NDI-based products.

Technical Information: Physical and Chemical Properties

Name TODI (CAS No: 91-97-4)
4,4’-Diisocyanato-3,3’-dimethyl-1,1’-biphenyl
Synonyms 3,3’-Dimethyl-4,4’-biphenyldiisocyanate
O-Tolidine diisocyanate
Purity Min. 99.5%
Molecular Weight 264.286 g/mol
Package 50 kg Fiber drum with inner plastic bag
Storage Keep cool and dry place
Appearance White pellets
Odor Odorless
Boiling Point 195-197°C (5 mmHg, or 667 Pa)
Melting Point 71.7°C
Specific Gravity 1.197 (80°C)
Solubility Insoluble in water and slowly hydrolyzed by water.
Soluble in acetone, carbon tetrachloride, kerosene, benzene, chlorobenzene, nitrobenzene.
Flash Point 218°C (Cleveland open cup)
NCO Content 31,78 2 x 42 (-NCO)/264.286 x 100

Registered Active Ingredients

  • Sealing (Oil sealing, piston ring, water seal, etc.)
  • Hydrophobic hydrocarbon main chain
  • Automobile parts (Grill, shock absorbers, bumper extensions, CVJ Boot, etc.)
  • Industrial use (Belt, roll, caster, etc.)
  • Electric (Coating agent, etc.)
  • Medical equipment (Artificial organ, etc.)

Chemical Structure