Process for the production of aromatic carbodiimides

Details Process for the production of aromatic carbodiimides Process for the production of aromatic carbodiimides

1993-12-06

1995-07-18

O'Sullivan, Peter

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

Organic compounds

Amino nitrogen containing

C07C23902

Patent

active

054343054

ABSTRACT:
A process for the production of aromatic carbodiimides by carbodiimidization of aromatic monoisocyanates in the presence of distillable organic phosphorus compounds as catalyst at 120.degree. to 220.degree. C. up to a maximum degree of carbodiimidization of 80% and subsequent removal by distillation of the unreacted starting isocyanate together with the catalyst from the reaction mixture, optionally together with subsequent preparation by distillation, together with the carbodiimides obtainable in accordance with this process.

REFERENCES:
patent: 2853473 (1958-09-01), Campbell et al.
patent: 2853518 (1958-09-01), Balon et al.
patent: 3267137 (1966-08-01), Fischer et al.
patent: 3502722 (1970-03-01), Neumann
patent: 3635947 (1972-01-01), Kober et al.
patent: 3644456 (1979-02-01), Ulrich
patent: 4096334 (1978-06-01), Keil
patent: 4260554 (1981-04-01), Ohlinger et al.

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