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US 2020/0331849 A1Published application
Method for producing carbodiimides
AssigneeLANXESS Deutschland GmbH
InventorWilhelm LAUFER
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Abstract
The invention relates to a novel method for preparing carbodiimides.
Claims12
A method for preparing monomeric aromatic carbodiimides, the method comprising:
- a) carbodiimidizing monomeric aromatic isocyanates in the presence of a catalyst,
- b) separating the low boilers and catalyst from the reaction product from a) in a thin-film evaporator,
- c) distilling the residue from b) in a further thin-film evaporator.
(canceled)
Dependencies are inferred from the claim text.