Process for the production of polyisocyanates containing uretdio

Details Process for the production of polyisocyanates containing uretdio Process for the production of polyisocyanates containing uretdio

1975-10-17

1976-11-23

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D22900

Patent

active

039936414

ABSTRACT:
The instant invention is directed to a process for the continuous production of aromatic polyisocyanates containing uretdione groups. The process broadly comprising dimerizing an aromatic polyisocyanate in a continuous, coolable screw reactor at a temperature of from -30.degree. to +70.degree. C.

REFERENCES:
patent: 2683144 (1954-07-01), Balon et al.

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