Method for preparing polybromophenoxy-substituted striazine fire-retardant compound

Abstract

The invention relates to the more monobromo-benzene oxygen radical substitutions even triazine flame retardance compound's preparation method. Its characteristic is: The reactant three will gather the chlorine cyanogens, the multi-bromophenols, shift the catalyst according to 1:2.5-3.1:0.01-0.1 a mole of allocated proportion to take the quantity, with the right amount organic solvent one and joins to a reactor, stir and cool it to 10 degree C below; Take the 5%-30% sodium hydroxide peroxide solution which mole of quantity sodium hydroxide compounds the weight percentage concentration with the multi-bromophenols, add by drops in the reactor stated, and maintain the system temperature not to surpass 10 degree C when adding by drops in the process; After the installment, heat the reaction material to 30-60 degree C ,and respond 1h-5h again; Then distillate to clean the resolve, cool, filtrate, the solid which the filtration obtains after the washing, drying is the system results in the product. This invention uses a method of 'a pot synthesis', the operation is simple, the pollution is reduced, the resolve may recycle repeatedly, the cost is small, and it is suitable for the industrialization production.

Description

technical field [0001] The invention relates to the preparation of a flame retardant compound, in particular to a preparation method of a polybrominated phenoxy substituted s-triazine flame retardant compound. Background technique [0002] Among the many types of flame retardants, brominated flame retardants are famous for their excellent flame retardant performance, wide application range, not too much influence on the physical and mechanical properties and electrical properties of the substrate, and the cost performance is far superior to other flame retardants. It has been widely used and still occupies the main position of flame retardant application in the world. However, the brominated flame retardant will cause the UV stability of the flame retardant base material to decline, and there will be secondary hazards such as smoke and corrosive toxic gases during combustion, which poses a serious threat to the environment and personal safety, especially the use of polybromi...

AI Technical Summary

Problems solved by technology

Jiang Hongquan of Qingdao University of Science and Technology and others added cyanuric chloride in batches to a mixed solvent of dichloromethane and toluene, and reacted with 2,4,6-tribromophenol to obtain tribromophenoxy-substituted s-triazine inhibitors. Combustible compounds, the yield reaches 92%, but this method cannot avoid the problem of cyanuric chloride feeding pollution, the separation operation process is troublesome, and the energy consumption is high

[0006] To sum up, domestic and foreign researches are mostly focused on the use of cyanuric chloride and 2,4,6-tribromophenol to synthesize tribromophenoxy-substituted s-triazine flame retardant compounds, and no cyanuric chloride Reports on the preparation of a series of polybrominated phenoxy-substituted s-triazine flame retardant compounds from cyanide and other polybrominated phenols; the preparation methods used are different, but there are certain deficiencies in both the homogeneous method and the phase transfer catalytic method

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