Improved process for the production of carbodiimide modified...

Details Improved process for the production of carbodiimide modified... Improved process for the production of carbodiimide modified...

C - Chemistry, Metallurgy

08

G

C08G 18/02 (2006.01) C07C 267/00 (2006.01)

Patent

CA 2509861

The present invention relates to an improved process for the production of carbodiimide modified organic isocyanate, preferably a polymethylene polyphenylisocyanate, and most preferably diphenylmethane diisocyanate. This process includes (1 ) neutralizing acidic impurities in an organic isocyanate, (2) partially carbodiimidizing isocyanate groups of the neutralized organic isocyanate, and (3) terminating the carbodiimidization reaction.

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