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US 4,902,825 AGranted
N,N'-bis(trans-4-isocyanatocyclohexyl)urea, a process for its preparation and its use
AssigneeBayer Aktiengesellschaft
InventorsAndreas Ruckes, Werner Rasshofer, Richard Kopp, Gerhard Grogler
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Abstract
The present invention relates to N,N'-bis-(4-isocyanatocyclohexyl)urea obtained from the reaction with water of cyclohexane-1,4-diisocyanate having a high trans isomer content. This invention further relates to the process for preparing the N,N'-bis(4-isocyanatocyclohexyl)urea and to its use in the synthesis of polyurethanes.
Claims5
A compound of the formula ##STR3## wherein the trans isomer N,N'-bis(trans-4-isocyanatocyclohexyl)urea comprises at least 80% by weight of said compound.
Dependencies are inferred from the claim text.