| 摘要 |
PURPOSE:To prepare a flocculant showing marked flocculation effect and easy in post-treament because of its reduced water content, by bonding a polymer derivative of N-substituted carbamoyl to dibenzalsorbit. CONSTITUTION:Dibenzalsorbit and halo-urea are mised under heating to introduce a carbamoyl group and glyceroyl dihalohydrin is succeedingly mixed under heating to form not only a cyclic derivative but also -NH-. Separately, ethyl urea and urea are mixed under heating to form a biuret derivative having an ethyl side chain and operation, such that epichlorohydrin is mixed with this derivative under heating to introduce an ethyl group into the chain terminal, is repeated and, further, the reaction product is reacted with hydroxylamines to obtain a straight chanin poly-N-methylcarbamoyl derivative having a hydroxyl group and a carbamoyl group at the terminal thereof and the abovementioned cyclic derivative of debenzalsorbit is reacted with the obtained derivative to be bonded thereto. |
