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公开(公告)号:US4560796A
公开(公告)日:1985-12-24
申请号:US547673
申请日:1983-11-01
申请人: Gerhard Smutek , Hermann Raveling
发明人: Gerhard Smutek , Hermann Raveling
IPC分类号: C07C279/28 , C07C20060101 , C07C129/14
CPC分类号: C07C277/08
摘要: 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.
摘要翻译: 本发明提供了一种改性双氰胺结晶形式的方法,其中双氰胺在0.001至10重量%的聚乙烯醇和/或水溶性纤维素醚衍生物存在下,从水溶液中结晶,称为 双氰胺的用量。 以这种方式获得的结晶双氰胺具有突出的流动和储存性能,并且其机械强度显着提高。