Patent ID: 11964931
Assignee: WOORI FINE CHEM CO., LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC B  C  G  Y | IPC B  C  G

Claim 8:
9. The process for preparing a diisocyanate composition of claim 8, wherein the distillation in step (2-2) is carried out by setting the bottom temperature of a distiller at 100° C. to 130° C. under a pressure of 2.0 torr or less for 2 hours to 10 hours,
the process further comprising degassing, before step (2-2), the resultant of the reaction of step (2-1) at 80° C. to 150° C. with the bubbling of nitrogen gas, or
distilling, before step (2-2), the resultant of the reaction of step (2-1) at 40° C. to 60° C. for 2 hours to 8 hours.