Patent ID: 9045395
Filing Date: 2015-06-02
Classification: C07C

Abstract:
1. A cycloaliphatic isocyanate containing liquid composition obtained from a process comprising: reacting a cycloaliphatic primary amine, or the hydrochloride or carbonate salt thereof, with phosgene in the presence of an inert solvent wherein the initial reaction temperature is between 100 and 130° C. and within 60 minutes of reaching said reaction temperature, subsequently increasing the temperature to 150 to 180° C. during the course of the reaction over a time span of about 10 minutes or less, maintaining the solvent to amine weight ratio from 95:5 to 80:20, maintaining the total reaction pressure between 50 and 350 psig and dispersing the amine in the phosgene; wherein the cycloaliphatic amine is selected from the group consisting of 1,3-bis(aminoethyl)cyclohexane, 1,4-bis(aminomethyl)cyclohexane, bis(aminoethyl)cyclohexane, 1,4-diaminocyclohexane, 2,4,6-tri(aminomethyl)cyclohexane, isophoronediamine, bis(aminocyclohexyl)methane, 2,2-bis(aminomethyl)propane, bis(aminomethy)cyclohexane, bis(aminomethyl)norbornene, and isomeric mixtures thereof; and wherein the cycloaliphatic isocyanate containing liquid composition comprises, following solvent removal and in the absence of any further separation steps, 80 w/w % or greater, but less than 100 w/w % of cycloaliphatic isocyanate, and balance unreacted phosgene and chlorinated byproducts.