Tungsten acid may be applied for the preparation of nano-ceramic color master so that the color master may has the advantages of high transparency, high heat insulation and low haze value.
The infrared ray blocking rate of this type of nano-ceramic color master is 60~99%. The visible light transmittance is 50~80% and the haze value is less than 1.
The nano-ceramic color master is widely applied in transparent plastic sheet, transparent heat-insulating film, transparent sunshade products and other products that need to shield infrared rays with high transparency. And it can be used with various resin carriers such as PC, PMMA, PET, PVC, PE, PP, ABS and PA, etc.
Preparation Principle of Tungsten Acid
1. Monoclinic ammonium tungstate pentahydrate decomposed to generate part of ammonia, water and ammonium tungstate during the decomposition process. The reaction formula is as follows:
5(NH4)2O•12WO3•5H2O=3(NH4)2O•12WO3•XH2O+4NH3↑+(7-X)H2O
2. Acid decomposition of ammonium metatungstate. The main reaction formula is as follows:
3(NH4)2O•12WO3•3H2O+6H2O+6HCL=12H2WO4+6NH4CL
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