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Titanium dioxide as the inorganic pigment in the Masterbatch is widely used , the dispersion particle diameter of a micron and sub-micron level , but , during use , the finer the pigment particles due to the effect of surface tension is easy to produce aggregation and formation of large particles , thus affecting the quality of the product , and therefore can not be used directly , and must be subjected to surface treatment . The paper mainly studied the surface treatment of titanium dioxide pigment , the use of a coupling agent , surface active agent and its surface is modified by changing its surface functional groups , and nature , to achieve the purpose of improving pigment dispersibility . Modified titanium dioxide used in masterbatch , surface treatment of the masterbatch various performance impact . The results showed that the titanium dioxide After a surface treatment , the surface properties changed , changed from hydrophilic to oleophilic . Titanium dioxide coated inorganics , coupling agents A and B add 2% and 3 % , respectively , relative to the best coupling agent . By TGA , TEM study of the nature of the modified titanium dioxide . Results show that after modification , the titanium dioxide dispersion is improved , the surface of the structure has been improved . Modified titanium dioxide used in masterbatch modified titanium dioxide various performance before and after the change . The results show that , modified titanium dioxide hiding the whiteness increased significantly . The rheology test after Brabaender modified titanium dioxide maximum torque and balance torque decreases, plastic processing performance is improved .
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