Process for the continuous production of polyisocyanate

Details Process for the continuous production of polyisocyanate Process for the continuous production of polyisocyanate

1980-08-14

1981-09-22

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453A, 260453AL, 260453AR, C07C119042, C07C12724

Patent

active

042909694

ABSTRACT:
A process for the continuous production of a polyisocyanate by reacting an organic diisocyanate with an adduct-producing agent that reacts with an isocyanato group to form an intermediate product having a urea bond and a gas is disclosed wherein the initial stage of the reaction is performed in one or two continuous complete mixing type reactors until the amount of gas generated is at least about 80% of the amount of gas to be generated during the entire reaction and the subsequent stage of the reaction is performed in a plug flow reactor.

REFERENCES:
patent: 3124605 (1964-03-01), Wagner
patent: 3350438 (1967-10-01), Hennig
patent: 3358010 (1967-12-01), Britain
patent: 3392183 (1968-07-01), Windemuth et al.
patent: 3903127 (1975-09-01), Wagner et al.
patent: 4176132 (1979-11-01), Ide et al.

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