Method for preparing melamine phosphonate flame-retardant-anti-crease integrated dressing agent for cotton

The invention relates to a method for preparing cotton-used melamine phosphonate flame-retardant and crease-resistant finishing agent, comprising the following steps: (1) formalin solution and water are obtained and stirred, pH value is adjusted, melamine is added, and a product (I) with water content of less than 15 percent is obtained after separating and drying; (2) methanol is put into a reactor, hydrochloric acid is used for adjusting pH, the product (I) is added, dissolving and heat preservation are carried out, NaOH is used for adjusting pH, and a product (II) is obtained by suction filtration; the product (II), dimethylphosphite and absolute ethyl alcohol are added into the reactor and stirred at room temperature, and heating and heat preservation are carried out; (3) triethylamine is used for adjusting pH value, reaction at the preserved temperature and measurement of turbidity are carried out, heating is stopped when the turbidity is 30 DEG C, the finishing agent is obtainedafter cooling and adding