一种暂溶型粘胶纤维微胶囊阻燃剂的制备方法

Preparing method of temporary soluble type viscose microcapsule flame retardant

Abstract

The invention relates to a preparing method of a temporary soluble type viscose microcapsule flame retardant and belongs to the technical field of flame retardant preparation. According to the method, at first, 4,4'-diamino benzanilide and deionized water are stirred and mixed, hydrochloric acid is added, the mixture is subjected to a water-bath heating reaction and cooled, a sodium hydroxide solution and sodium carbonate continue to be added, after stirring and mixing are carried out, toluene is added, then heating is carried out, heat is preserved, after cooling is carried out, benzamide is added dropwise, the mixture is stirred and mixed, after a pH value is adjusted to 7.0, the mixture is evaporated in a rotary mode to be dried, and the mixture is collected and crystallized to prepare a temporary soluble product; the temporary soluble product is mixed with substances like dimethyl methyl phosphonic acid ester to prepare a temporary solution, the temporary solution is mixed with cyclohexane, subjected to ultrasonic oscullating, placed into a polyvinyl alcohol solution, stirred, mixed, and filtered in a suction mode, and filter cakes are collected, washed and dried to obtain the flame retardant. The phenomena of rubber block generation and reunion in the spinning process are avoided, and a spinning property of viscose is improved; meanwhile, the flame-retardant effect is good, and flame-retardant efficiency is improved by 8-12%.
本发明涉及一种暂溶型粘胶纤维微胶囊阻燃剂的制备方法,属于阻燃剂制备技术领域。本发明首先将4,4-二氨基苯甲酰苯胺和去离子水搅拌混合,并添加盐酸,进行水浴加热反应后,冷却,并继续添加氢氧化钠溶液和碳酸钠,搅拌混合后,再添加甲苯,随后加热,并保温,待冷却后,对其滴加苯甲酰胺,搅拌混合,调节pH至7.0后,旋转蒸发至干,收集结晶,制备得暂溶物;将其与甲基膦酸二甲酯等物质混合制备得暂溶液,并与环己烷混合,并进行超声振荡后,置于聚乙烯醇溶液中,搅拌混合,抽滤并收集滤饼,经洗涤,干燥即可。本发明避免了纺丝过程产生胶块和出现重聚现象,提高了粘胶纤维的可纺性;同时阻燃效果好,阻燃效率提高8~12%。

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