Process for preparing aliphatic isocyanates from aromatic...

Details Process for preparing aliphatic isocyanates from aromatic... Process for preparing aliphatic isocyanates from aromatic...

C - Chemistry, Metallurgy

07

C

C07C 263/10 (2006.01) C07C 263/04 (2006.01) C07C 265/14 (2006.01) C07C 265/10 (2006.01)

Patent

CA 2449465

The invention relates to a process for preparing aliphatic isocyanates from aromatic isocyanates in essentially 3 steps. In particular, the invention relates to a process for preparing bis[4-isocyanatocyclohexyl]methane (H12MDI) from bis[4-isocyanato- phenyl]methane (MDI). The invention relates particularly to a process for prepaying H~2MD1 having a content of the traps-traps isomer of < 30%, preferably < 20%, particularly preferably from 5 to 15%.

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