Isocyanatoaryl sulphochlorides, a process for their...

Details Isocyanatoaryl sulphochlorides, a process for their... Isocyanatoaryl sulphochlorides, a process for their...

C - Chemistry, Metallurgy

08

G

402/129, 260/455

C08G 18/77 (2006.01) C07C 143/70 (1980.01)

Patent

CA 1120944

ABSTRACT OF THE DISCLOSURE Isocyanatoaryl sulphochlorides corresponding to the following general formula: Image wherein R represents hydrogen, a sulphochloride group (SO2Cl) or a sulphonic acid group (SO3H), are produced by reacting 2,4-diisocyanatotoluene, optionally as mixtures with up to 35% by weight of 2,6-diisocysnatotoluene,with from 0.2 to 2 mols, per mol of starting diisocyanate, of sulphur trioxide or chlorosulphonic acid and from 0.3 to 20 mols, per mol of starting diisocyanate, of an inorqanic acid chloride, either successively or simultaneously,at a temperature of from 0 to 160°C and hydrogen chloride being removed.

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