Hexamethylene diisocyanate

  • Hexanediisocyanate
  • Diisocyanatohexane
  • 1,6-hexamethylene diisocyanate
  • HDI
  • HMDI

Colorless liquid with a pungent, unpleasant odor

Liquid

1.05 g · cm -3

-67 ° C

255 ° C

1.4 Pa ( 20 ° C)

Decomposition in water

1.4585 (20 ° C)

Risk

0.005 ml · m-3 and 0.035 mg · m-3

746-959 mg · kg -1 ( LD50, rat, oral)

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Hexamethylene diisocyanate ( or, more precisely, hexamethylene -1 ,6 -diisocyanate ) is a chemical compound selected from the group consisting of aliphatic isocyanates. It is a colorless to yellowish liquid with a pungent odor.

Production and representation

Hexamethylene diisocyanate can be obtained by the reaction of hexamethylene diamine with phosgene, followed by purification.

Properties

Physical Properties

The vapors of hexamethylene diisocyanate are 5.81 times heavier than air.

Use

Hexamethylene diisocyanate is an essential raw material for polyurethane coatings. Almost the entire amount of consumption in the FRG to paint raw materials for the automotive and furniture industries, such as HDI biuret and HDI isocyanurate, further processed.

Safety

In case of strong heating (flash point 130 ° C ) of hexamethylene diisocyanate vapors may form an explosive mixture with air.

CAS registry number Vapor pressure Dangerous Substances Directive (67/548/EEC) CRC Handbook of Chemistry and Physics
390551
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