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DuPont™ CHDI

trans-cyclohexane diisocyanate

DuPont™ CHDI is a specialty isocyanate which offers outstanding dynamic properties and high temperature stability in cast and thermoplastic elastomers. Due to its small size and molecular symmetry, this aliphatic diisocyanate provides a compact hard segment in polyurethane formulations. CHDI-based elastomers show:

  • Superior high temperature dynamic properties
  • Light and color stability
  • Excellent solvent and abrasion resistance
  • Hydrolytic stability

In addition to CHDI, DuPont products also include PPDI specialty isocyanate. Contact DuPont for information on these products.

Sales Specifications

Property   Limit 
Purity, %    99.0 min 
cis-CHDI, %    0.5 max 
Chloromonoisocyanate, ppm    1000 max 
Residual solvent, ppm    300 max 
p-Phenylenediisocyanate    50 max  
Acidity, meq/g     0.0001 max 
Toluene insolubles, %    0.5 max 
Hydrolyzable chlorides, ppm     200 max 

 

 

Typical Physical Properties

Property   Value 
CAS Number    7517-76-2  
Formula     C6H10(NCO)2 
Molecular weight  166.18   
NCO Content, %    50.5  
Isocyanate Equivalent Weight     83.1 
Melting Point, °C (°F)     60 (140) 
Boiling Point, 760 mmHg, °C (°F)   260 (500) 
Vapor Pressure at 20°C, mmHg
                      at 60°C, mmHg
<0.006
0.3  
Specific Gravity at 70°C  1.116  
Flash Point, CCCM, °C (°F)    >99 (>210) 
Appearance white solid   

 

*This table gives typical properties based on historical production performance. DuPont does not make any express or implied warranty that these products will continue to have these typical properties.

Handling

CHDI, like most isocyanates, is toxic. Refer to the MSDS before use.

Packages

DuPont™ CHDI is available in cast solid form in 10 kg (22 lb) and 881.8 kg (400 lb) net drums.