Process for the production of aromatic isocyanates containing aromatically bound sulfochloride groups
AssigneeBayer Aktiengesellschaft
InventorsDieter Dieterich, Heinz U. Blank, Erich Wolters, Norbert Langenfeld
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Abstract
The instant invention is directed to a process for the production of an aromatic isocyanate containing aromatically bound sulfochloride groups, comprising: (I) reacting (a) an isocyanate or carbamic acid chloride which contains at least one aromatically bound isocyanate group and/or at least one aromatically bound carbamic acid chloride group, successively or simultaneously at 0.degree. to 170.degree. C. with (b) a sulfonating agent and (c) an organic compound containing at least one aromatically bound trihalo methyl group and (II) removing hydrogen chloride from the reaction mixture at 20.degree. to 170.degree. C.
Claims5
A process for the production of an aromatic isocyanate containing aromatically bound sulfochloride groups, comprising:
- (I) reacting
- (a) an isocyanate or carbamic acid chloride which contains at least one aromatically bound isocyanate group and/or at least one aromatically bound carbamic acid chloride group, successively or simultaneously at 0.degree. to 170.degree. C. with
- (b) a sulfonating agent and
- (c) an organic compound containing at least one aromatically bound trihalo methyl group and
- (II) removing hydrogen chloride from the reaction mixture at 20.degree. to 170.degree. C.
Dependencies are inferred from the claim text.