78632-23-2Relevant articles and documents
Method for Preparing Diureido Compounds
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Paragraph 0037; 0056-0058, (2016/12/22)
The present invention relates to a method for producing diureido by making diamine having 2 to 13 carbon atoms react with urea. The producing method uses alcohol having 3 to 12 carbon atoms as a reaction solvent and uses tetraalkylammonium hydroxide as a catalyst. According to the producing method of the present invention, the diureido can be produced in a high yield and in a short time.COPYRIGHT KIPO 2016
Method for Producing Carbonyl Compund
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Paragraph 0751; 0752; 0753, (2013/07/19)
A method for producing a carbonyl compound of the present invention comprises a step (X) of reacting a specific compound having a urea bond with a carbonic acid derivative having a carbonyl group (—C(═O)—) under heating at a temperature equal to or higher
METHOD FOR PRODUCING ISOCYANATES
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Page/Page column 7, (2010/12/26)
The present invention relates to a multiple-stage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic poly-amines with ureas to form low-molecular monomeric polyureas, and the thermal decomposition thereof.