Process for the preparation of carbodiimides

Details Process for the preparation of carbodiimides Process for the preparation of carbodiimides

1988-09-02

1991-02-05

Wax, Robert A.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

564252, C07C20980

Patent

active

049902326

ABSTRACT:
The photooxidation of N,N'-substituted thioureas with oxygen in the presence of an acid-trapping agent gives N,N'-substituted carbodiimides. The carbodiimides can be converted into cyanoguanidines, which are suitable as latent curing agents for epoxy resins.

REFERENCES:
patent: 2656383 (1953-10-01), Schmidt et al.
Dubey et al., Current Science, vol. 54, No. 7 (1985); pp. 340-342.

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