| 摘要 |
PURPOSE:To produce a water-insoluble and fine particulate compound having excellent fame retardance, by reacting a methylolated guanidine compound with melamine and urea under neutral - slightly alkaline condition and acidifying the reaction product. CONSTITUTION:A methylolated guanidine compound, e.g. methylolated guanidine phosphate, guanidine sulfamate, etc., is normally in a state of an aqueous solution and reacted with melamine and/or urea, preferably at 1/2-2/3 molar ratio based on methylol groups in a neutral - slightly alkaline aqueous solution and the pH of the above-mentioned reaction solution is subsequently acidified to <=6 with an acid, preferably sulfuric acid, phosphoric acid, acetic acid, etc., to deposit the aimed compound. The resultant compound is useful as a flame retardant additive for polymers such as plastics or cellulosic materials.
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