Process for the preparation of aromatic carbodiimides

Details Process for the preparation of aromatic carbodiimides Process for the preparation of aromatic carbodiimides

1980-04-24

1981-04-21

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453AR, C07C119055

Patent

active

042632218

ABSTRACT:
A process for preparing select symmetrical, aromatic carbodiimides by reacting select symmetrical, aromatic ureas with phosgene in an inert liquid reaction medium. The aromatic carbodiimides produced are useful as components in the preparation of cellular and noncellular polyurethanes, and they can also be used as components in the preparation of isocyanate compositions.

REFERENCES:
patent: 2757184 (1956-07-01), Pelley
patent: 2853473 (1958-09-01), Campbell et a.
patent: 3157662 (1964-11-01), Smeltz
Gavin et al., J. Org. Chem., vol. 32, 2511 (1967).
Nurzer et al., Chemical Reviews, vol. 67, No. 2, pp. 107-152, (1967).

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