Patent ID: 7745659

Claim:
A process for the production of organic isocyanates having carbodiimide- and/or uretone imine groups, comprising: (1) partially carbodiimidizing one or more organic isocyanates with a Hazen color index of ≦100 APHA with a phospholine catalyst and (2) adding an alkylation agent to stop the carbodiimidization reaction in which said alkylation agent comprises one or more esters of trifluoromethanesulfonic acid of the structure CF 3 —SO 3 —R 1 , wherein R 1 represents an aliphatic, cycloaliphatic or araliphatic radical, wherein the resultant organic isocyanates containing carbodiimide- and/or uretone imine groups have a Hazen color index of ≦100 APHA.