Preparation of isocyanates having a light color

Details Preparation of isocyanates having a light color Preparation of isocyanates having a light color

1998-03-18

1999-02-16

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

C07K11802

Patent

active

058722785

ABSTRACT:
In a process for preparing isocyanates having a light color by reacting the corresponding amines with phosgene, the amines are treated with solid inorganic substances containing Lewis acid and/or Bronsted acid centers prior to the reaction with the phosgene.

REFERENCES:
patent: 4465639 (1984-08-01), Hatfield, Jr.
patent: 5364958 (1994-11-01), Ishida et al.

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