Synthesis And Properties Of Phosphate Flame Retardant

In cold region of China, macromolecular syntheses outer wall thin plastering system isadopted on most energy-saving buildings. This system can work better in heat preservation andenergy-saving. Most heat preservation and energy-saving materials on Chinese constructionmarket are mainly polystyrene board(white cystosepiment) and extruded polystyrene board(XPSboard) outer wall thin plastering system. As the requirement for construction energy-savingstandard improves, compound polystyrene heat preservation board with better thermal insulationproperty and compressive strength is gradually replacing the conventional polystyrene board inroofs and walls of buildings, so that resulting better thermal insulation and energy conservation,lowering use-cost of this material efficiently. However, polystyrene is flammable. During theburning process plenty of heat is generated which can easily incur a fire, thus a big hiddendanger to people’s lives and properties. For this China has made relevant compulsory standardson the application of the material and is devoted to development and research of efficient,environmentally-friendly and new type inflaming retarding thermal insulation material.Based on this, we synthetise fifteen phosphate fire retardants of three series and choose thebest retardant in the application for expanded polystyrene, testing its flame retardant property.This article is separated in two parts, the first part is about the composition of phosphate fireretardant and structural testing. After reading a large number of documents both at home andabroad, in this article we synthetised new polyphosphoester fire retardant of liquid state withphosphorus oxychloride, alkyl glycols and alkyl mellow wine.The synthetic route is like this:first, under certain temperature, midbody is generated in the reaction of alkyl glycols andphosphorus oxychloride; second, under certain temperature, end-product was generated in thereaction of midbody and unitary alkyl alcohol or phenol. We studied influencing factors ofsynthetic reaction, set productivity as measurement index. Through orthogonal test and singlefactor method we studied reaction temperature, reactant ratio and response time’s impact onproductivity, thereby determined optimum response condition. Through appearance inspection,viscosity test, phosphorus content test and acid value methods we carried out physical andchemical property test. We adopted infrared analysis(FI-IR) to characterize the structure of fireretardant. Through thermogravimetric analysis(TGA), we studied their thermal degradationbehavior. In the second part,we mainly explored synthesis condition of inflaming retardingexpanded polystyrene, determined optimum synthetise condition and tested its flame retardantproperty. The result shows that composite fire retardant is an excellent one, and the flameretardant property of inflaming retarding polystyrene material is very good. For now there are no reports of like products yet, nor there are reports of like productsapplication in expanded polystyrene material. We have applied related patent, and the technologyis simple, raw materials cheap. We can expect its industrial production.