Suvarna Garge (Editor)

Hexamethylene diisocyanate

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Formula
  
C8H12N2O2

Molar mass
  
168.2 g/mol

Melting point
  
-67 °C

Density
  
1.05 g/cm³

Boiling point
  
255 °C

Appearance
  
Colourless liquid

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Hexamethylene diisocyanate (HDI) is an organic compound in the class known as isocyanates. More specifically, it is an aliphatic diisocyanate. It is produced in relatively small quantities, accounting for (with isophorone diisocyanate) only 3.4% of the global diisocyanate market in the year 2000. Aliphatic diisocyanates are used in special applications, such as enamel coatings which are resistant to abrasion and degradation from ultraviolet light. These properties are particularly desirable in, for instance, the exterior paint applied to aircraft and vessels.

Contents

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Synthesis

There are two steps to the synthesis of pure HDI:

Hexamethylene diisocyanate HEXAMETHYLENE DIISOCYANATE CAS 822060 05201587 MP Biomedicals

  • Phosgenation: Reaction of hexamethylene diamine with phosgene to form crude HDI
  • Purification: Distillation of crude HDI to extract pure HDI

    • Chemistry

    HDI is a symmetrical molecule and thus has two isocyanate groups of equal reactivity.

    Hexamethylene diisocyanate One Synthetic Approach of Hexamethylene diisocyanate Chempedia

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    Hexamethylene diisocyanate 16hexamethylene diisocyanate Ligand page IUPHARBPS Guide to

    Hexamethylene diisocyanate HEXAMETHYLENE DIISOCYANATE HDI

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    Hexamethylene diisocyanate CAS No6336895616Hexamethylene diisocyanate polymer with

    Hexamethylene diisocyanate Patent EP0295055A2 Biodegradable polymeric materials based on

    References

    Hexamethylene diisocyanate Wikipedia
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