Process for the production of isocyanates
AssigneeBayer Aktiengesellschaft
InventorsWerner Mormann, Edith Hissmann
Life of this patent
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Abstract
Isocyanates containing ester and/or amide groups are produced by reacting (a) an isocyanatocarboxylic acid chloride with (b) an organic compound containing a silylated alcoholic group and/or silylated phenolic hydroxyl group and/or silylated amino group which compound contains no other group which is reactive with isocyanate and chlorocarbonyl groups under the reaction conditions. The reaction of (a) with (b) is carried out at a temperature of from -20.degree. to 150.degree. C. This process makes it possible to produce the desired isocyanates with a high degree of selectivity.
Claims8
A process for the production of an isocyanate containing ester and/or amide groups in which
- (a) an isocyanatocarboxylic acid chloride is reacted with
- (b) an organic compound containing at least one silylated alcoholic group, silylated phenolic hydroxyl group and/or silylated amino group which compound contains no other group which is reactive with isocyanate and chlorocarbonyl groups under the reaction conditions at a temperature of from -20.degree. to 150.degree. C.
Dependencies are inferred from the claim text.