Melamine aminotrimethylene phosphonate and preparation method thereof

Abstract

The invention relates to a melamine aminotrimethylene phosphonate and a preparation method thereof. The preparation method comprises the following synthesis steps: adding measured melamine and an appropriate amount of deionized water in a reaction kettle with a stirring device, raising a temperature and stirring to obtain the completely-dissolved melamine solution, then slowly dripping aminotrimethylene phosphonic acid aqueous solution with a proper concentration, reacting for a period of time with heat, after the reaction is ended, filtering, washing and drying to obtain the target compound. The raw materials in the preparation method disclosed by the invention are melamine and aminotrimethylene phosphonic acid, rich in source and low in price; the preparation process is simple in flow and low in cost. The melamine aminotrimethylene phosphonate obtained by the preparation method disclosed by the invention is good in heat stability and good in compatibility with polymers, simultaneously has the characteristics of nitrogen-containing and phosphorous-containing flame retardants, and has high flame-retardant efficiency, wide application range (applicable to the flame retardance of many plastics, rubbers, fibres and coatings), and a wide market prospect.

Description

technical field [0001] The invention relates to a melamine amino trimethylene phosphonate and a preparation method thereof, in particular to a novel nitrogen-containing organic polyphosphonate flame retardant and a preparation method thereof. Background technique [0002] Polymer materials are widely used in various fields of the national economy due to their excellent performance and other advantages. However, most polymer materials are combustible materials, which are not easy to extinguish when burned, and produce thick smoke and toxic gases, which pose a threat to people's life safety and harm environment. Therefore, it is necessary to synthesize suitable flame retardants for flame retardancy of polymer materials. [0003] Phosphorus-based flame retardants have the characteristics of low smoke and low toxicity, but poor thermal stability. Nitrogen-based flame retardants have the characteristics of low toxicity, low corrosion, and high thermal decomposition temperature, ...

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Problems solved by technology

It may be that inorganic phosphoric acid itself does not contain carbon elements, which has an impact on the char formation effect of flame retardants

Patent CN102344570A, a melamine carboxyethylphenylphosphinic acid condensate and its preparation method, mentions that melamine and carboxyethylphenylphosphinic acid (organic phosphonic acid) are used as raw materials to synthesize P-N composite intumescent flame retardants. The flame retardant has the characteristics of high phosphorus content, and the reaction is carried out in the water medium without pollution, but the experiment proves that the flame retardant is poor in charring, and the flame retardant effect on polyolefin is not ideal. Phosphonic acid has low solubility in water at room temperature, requires a higher temperature to dissolve, and the reaction conditions are harsher

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