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The fire retardant coating is both a decorative function but also functional features of fire retardant paint. The flame is a growing threat to people's daily lives, with the wide application of high-rise buildings, clustered and combustible organic synthesis materials, fire-resistant coating is widely used as one of the effective measures of fire prevention. This study of magnesium hydroxide flame retardant coatings flame-retardant effect is good, both economical and environmentally friendly, is an environment-friendly paint. This paper studies the content of the following aspects:. Single factor test method of preparation and utilization of magnesium hydroxide investigated the reaction temperature, stirring intensity, the end point of pH and aging time magnesium recoveries; Based on this, the use of positive cross design test methods to determine the best preparation of nanoscale magnesium hydroxide test conditions: MgSO4, the concentration of the solution is 0.1 mol L-1 NaOH solution concentration of 5 mol L-1, the reaction temperature of 55 ° C, stirring speed to 900r · min-1, the titration end point pH value of 13, the aging time of 90min; amplification test and surface modification on the best conditions, magnesium hydroxide obtained by XRD, TEM and specific surface area analyzer detection size approximately 20-60 nm rod materials, surface modification of magnesium hydroxide from the specific surface area of 74.456 m2 · g-1 to 96.245 m2 · g-1, the agglomeration been significantly improved. The decomposition kinetics of magnesium hydroxide article explores the decomposition kinetics of magnesium hydroxide and its decomposition mechanism: the effects of temperature, conversion rate and particle size on the kinetics of decomposition of magnesium hydroxide, results showed: Apparent activation energy has a relationship with the temperature, the conversion rate, are increased with increasing both, but with the temperature dependence of the relationship between linear, with the conversion rate is nonlinear; dynamics calculation results show that, The magnesium hydroxide apparent activation energy increases as the sample size increases. Preparation of magnesium hydroxide flame retardant coatings Preparation of magnesium hydroxide flame retardant coatings using single factor method, to examine the amount of magnesium hydroxide add coating performance by the combustion method to design analog board Intumescent The flame retardants time were determined by the results of this test and the apparent performance of the coating determine the optimum coating formulation and the proportion of two-component, as follows: Group A points in the epoxy resin 25 points, 9 parts of ammonium dihydrogen phosphate, melamine 9 parts, pentaerythritol, 7 parts, 10 parts of magnesium hydroxide, and others (such as solvents, additives) 40 parts; Group B is divided into the curing agent component, wherein the polyamide resin of 50 parts, butanol, xylene, 25 parts each; The two-component ratio of 8:2. Its detection of fire performance and physical and chemical properties, has reached a national level technical requirements. The test results show that the fire retardant coating is a superior performance of fire-resistant coating. 4. Nano magnesium hydroxide is added to the paint played a good flame.
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