Manufacture of isocyanates
AssigneeAmerican Cyanamid Company
InventorsBalwant Singh, William A. Henderson, Jr.
Life of this patent
Estimating the term…
Abstract
A process for production of tertiary benzyl isocyanates by reaction at low temperatures of the corresponding halides with an excess of isocyanic acid.
Claims17
A process for the production of tertiary benzyl isocyanates which comprises reacting a halide of the formula ##STR4## in which X represents a halogen atom, R.sub.1 and R.sub.2 represent alkyl groups of 1 to 3 carbon atoms and R.sub.3 represents an aromatic group such as a phenyl, bisphenyl or naphthyl group or a substituted phenyl, biphenyl or naphthyl group having halogen, methyl, methoxy substituents or substituents of the formula ##STR5## with a stoichiometric excess of isocyanic acid in a solution in a solvent for said halide and isocyanic acid.
Dependencies are inferred from the claim text.