TODI Cas 91-97-4, , isocyanate-type curing agent for polyurethane TODI 91-97-4 curing agent, hardener
TODI Cas 91-97-4, , isocyanate-type curing agent for polyurethane TODI 91-97-4 curing agent, hardener

HARTDUR 118 (TODI)

Trade Name: TODI
Similar Name: 3,3'-Dimethyl-4,4'-biphenylene diisocyanate
Molecular Formula:C16H12N2O2
CASNumber:91-97-4
 

HARTDUR 118 (TODI) is specifically formulated to optimize the mechanical characteristics of polyurethane (PU) products. Utilizing HARTDUR 118 in the synthesis of polyurethane elastomers results in materials that demonstrate exceptional resistance to heat and hydrolysis, coupled with robust mechanical properties. These characteristics render the elastomers ideal for deployment in adverse conditions and stringent environments. Moreover, the molecular structure of HARTDUR 118, characterized by significant steric hindrance, extends TODI lifespan. This feature enhances the stability and manageability of the prepolymers incorporating HARTDUR 118, facilitating their application in diverse industrial contexts.

Package:

50kgs/iron drum.

It can be packaged on demand. Please inquire.      


HARTDUR 118 (TODI) is pure 3,3'-Dimethyl-4,4'-biphenyldiisocyanate (TODI) and is supplied in the form of fine milky white, or occasionally yellowish white, granular solid. Its vapor pressure at room temperature is below 10-4mbar. Permissible in the air at working places according to the Federal Republic of Germany is 0.01 ppm = 0.087 mg/m3. This value is not allowed to exceed even for short periods. Being exceptionally reactive, TODI must be treated as a dangerous material and it must therefore be handled with care. The potential risks of HARTDUR 118 (TODI) depend mainly on the extent to which isocyanate dust, vapors, or aerosols are formed during the processing of this product. The circumstances and operations in which workers may be exposed to HARTDUR 118 (TODI) in any of these forms are as follows: dust may rise from the solid material while it is being weighed or introduced into reaction vessels; vapors and aerosols are formed in the cross linking of hot prepolymer batches containing an excess of TODI and in the production of castings (the aerosols owe their formation to the cooling and condensation of hot isocyanate vapors).


Chemical Name3,3'-Dimethyl-4,4'-biphenylene diisocyanate
CAS No.91-97-4
Molecular weight (g/mol)264.27
AppearanceWhite slice crystal
NCO Content (%)31.8
Melting Point (°C)69~71
Density (g/cm3)1.12
Total Chlorine Content (%)0.1 max.
Hydrolysable Chlorine Content (%)0.01 max.
Purity (%)99 min.
Package50 KGS/iron drum
Self Life6 months since production date.

Storage  Caution:

HARTDUR 118(TODI) is sensitive to moisture. Water reacts with all diisocyanates to form insoluble urea derivatives. HARTDUR 118 (TODI) should be stored in tightly sealed containers in cool and dry conditions. Do NOT put TODI along with food and avoid exposing in an environment above 30℃. After using, the lid must be sealed immediately in case of dysfunction. Under suitable storage conditions, TODI is valid for six months at least with effect from the date on which it’s delivered.

 


  • Seals (oil seals, water seals, piston rings, etc.)
  • Automotive parts (bumpers, shock absorbers, etc.)
  • TPU anti-slip snow chains
  • Other high-performance PU/TPU products
  • Artificial organ products