MDI is the standard abbreviation for methylene diphenyl diisocyanate.

“MDI” refers to a mixture of 4,4’-methylenediphenyl diisocyanate and its isomers.

MDI is commonly used to manufacture the following types of polyurethane foams:
• Rigid and semi-rigid
• Flexible
• Integral skin
• Microcellular

MDI is also used to make:
• Elastomers
• Coatings
• Adhesives
• Binders

Toluene Diisocyanate