C - Chemistry – Metallurgy – 08 – G
Patent
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.
341161
Aktiengesellschaft Bayer
Sherman
LandOfFree
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