Process for the modification of the crystal form of dicyandiamid

Details Process for the modification of the crystal form of dicyandiamid Process for the modification of the crystal form of dicyandiamid

1983-11-01

1985-12-24

Warren, Charles F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C12914

Patent

active

045607966

ABSTRACT:
The present invention provides a process for the modification of the crystal form of dicyandiamide, wherein dicyandiamide is crystallized from aqueous solution in the presence of 0.001 to 10% by weight of polyvinyl alcohol and/or of a water-soluble cellulose ether derivative, referred to the amount of dicyandiamide. The crystalline dicyandiamide obtained in this manner has outstanding flow and storage properties and its mechanical strength is substantially improved.

REFERENCES:
patent: 3308022 (1967-03-01), Cummings et al.

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