Study on Preparation of Insulation and Flame Retardant Building Materials with Inorganic Compound Phenolic Foam

Abstract

In recent years, phenol-formaldehyde foam has been widely used as an ideal heat-insulating structural material in the construction field. However, the traditional phenolic foam itself has the disadvantages of easy powdering and high production cost. For this reason, this paper studied the preparation of flame retardant building materials with inorganic compound phenolic foam.In this paper, 15% phosphoric acid was used to acidify the fly ash and bentonite to prepare the inorganic composite phenolic foam. The effect of acidification treatment and its addition amount on the performance of the composite phenolic foam was studied. The results show:1) The strength of the composite foams after acidification treatment is higher than that of the non-acidified composite foams, especially the acidified fly ash composite foams have better properties. This shows that the acidified fly ash is more suitable as a filler of composite phenolic foam. 2) The limit oxygen index of the inorganic composite foam is lower than that of phenolic foam. This shows that inorganic material added to the resin matrix is bad for flame retardant effect.