67results about How to "Improve flame retardant effect" patented technology

The invention discloses a method for preparing intumescent type flame retardant synergist on the basis of magnesium oxide flue gas desulfurization residue. The method includes the steps of (1) adding water and dried magnesium oxide flue gas desulfurization residue in a reactor to prepare turbid liquid A with mass concentration ranging from 1-30%; (2) adding phosphate into the turbid liquid A, stirring at the room temperature for 0.5-1 hour to obtain turbid liquid B, simultaneously adding zinc salt and ammonia water in the turbid liquid B, and stirring at the room temperature for 1-2 hours to obtain turbid liquid C; (3) adjusting the pH (potential of hydrogen) value of the turbid liquid C to 6.5-7.5, filtering the turbid liquid C to obtain filtrate and solid powder, and drying the solid powder to obtain the intumescent type flame retardant synergist. The intumescent type flame retardant synergist prepared by the method contains elements including phosphorus, nitrogen, magnesium, silicon and the like, is good in cooperation efficiency with intumescent flame retardant, obvious higher in flame retardant efficiency of the fire retardant, and simultaneously has the advantages of high additional value, low raw material cost, environmental friendliness, simplicity in preparation method, wide raw materials sources and applicability to industrial production.