Methylene Diphenyl Diisocyanate is produced by a 4 steps reaction based on benzene as feedstock.
There are 3 isomers of MDI: 2, 2-MDI, 2, 4-MDI, and 4, 4-MDI. The 4, 4 isomer is known as pure or monomeric MDI (mMDI).The Polymeric MDI so called Crude MDI contains monomeric MDI and products with higher MW (pMDI).
Uses
Methylene diphenyl diisocyanate (MDI) is used in the production of polyurethanes for many applications, including the manufacture of rigid polyurethane foams used for home and refrigerator insulation. Insulation made with MDI can help consumers conserve energy.
Some additional uses of MDI in polyurethanes include coatings, adhesives, sealants, and elastomers (CASE) found in items such as paints, glues, and weather resistant materials. It is also used to make many types of footwear, sports and leisure products and to a much lesser extent, some specialty flexible foams. MDI can also be used as a binder for wood and to produce mold cores for the foundry industry.
Chemical name: Methylene Diphenyl Diisocyanate (MDI)
CAS Number: 101-68-8
