Carbodiimides and processes therefor
AssigneeE. I. Du Pont de Nemours and Company
InventorMichael W. J. West
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Abstract
Processes are provided for making polycarbodiimides with high carbodiimide contents from isocyanates, and for selectively making mixed aryl-tertiary carbodiimides from isocyanates. Also provided are carbodiimides containing alpha-methylstyryl groups, and polymers made therefrom. All of these polymers and compounds are useful in coatings, and for other applications.
Claims3
An alternating polycarbodiimide in which a first alternating unit is directly connected to two adjacent carbodiimide groups through aromatic carbon atoms, and a second alternating unit is directly connected to two adjacent carbodiimide units through tertiary alkyl carbon atoms.
Dependencies are inferred from the claim text.