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Polymeric diphenylmethane diisocyanate (PMDI)

Art.No P-038
Conc (% w/w) 2.0% pet
Series I
Molality -
MW 0
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Hapten Information
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Polymethylene polyphenylisocyanates, Polymeric MDI


Diphenylmethane diisocyanate (MDI), see D-023, is the generic name of a product used in industrial settings. Polymeric MDI (PMDI), the primary technical/commercial form of MDI, is actually a mixture that contains 25-80% monomeric 4,4'-MDI as well as oligomers containing 3-6 rings and other minor isomers, such as the 2,2'-isomer. The exact composition of PMDI varies with the manufacturer. PMDI is used to make rigid and flexible foam, foundry resin sand binders, and heat insulating material.

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