The Application Of Nanometer Aluminum Hydroxide To Fire Retardant Coatings

In recently years,as the Human requirements of building materials is increasing,polymer material and steel are used more widely,that polymer material have flammability and steel have low fire resistance limit cause rising trend of fire. The fire caused casualty and property loss is serious, the fire prevention problem has become the focus of people. waterborne intumescing fire-retardant coatings remit the fire losses. fire retardant coating that cover the flammability and low fire resistance limit surface reduce flammability and improve fire resistance limit.As the fire or high temperature,coating happen expansion carbonized to form honeycomb carbonaceous layer a few times higher than the original and reduce heat transfer,improving materials fire-retardant time.The present experimental study investigates the influence of the components of fire-retardant coating on fireproof performance. Base material select silicone-acrylate emulsion and polyvinyl acetate emulsion to stuy the influence of the compound proportion and the amount on fireproof performance. The experimental results have shown tha the fireproof performance was best when compound proportion and amount were 3:1,27.5% respectively. To select titanium dioxide the fireproof performance was best, titanium dioxide not only improve coating of mechanical properties and can improve fire performance,when the amount was 17.5%, the fireproof performance was best.When the optimum compound proportion was m(dehydrating catalyst):m( charring agent):m(foaming agent)=10:5:6, the fireproof performance was best.The previous studies investigates the influence of the components of fire-retardant coating on heating rate was seldom. the present experimental study investigates the influence of the amount of the components on heating rate, the experimental results show that dosage of components have an effect on fireproof time for middle late, initial fireproof time have no effect on.So, heating process can be divided into two parts. The conclusion can improve fireproof performance,the author considered select low temperature decomposition material in early,reducing heating rate improve fireproof performance. Adding nanometer aluminum hydroxide fireproof performance can be enhanced, this paper studies the influence of the amount of nanometer aluminum hydroxide on fireproof performance and initial heating rate,the fireproof performance and physicochemical properties were better when the amount of nanometer aluminum hydroxide was 12%, the experimental results show that nanometer aluminum hydroxide decomposition can absorb heat which reduce initial heating rate, fireproof performance can be enhanced. Agglomeration was common problems for nano-particles, for the improve the dispersion of the coating, modified nanometer aluminium hydroxide,the result show that modified nanometer aluminium hydroxide improve fireproof performance.