Modification of cubic nano-CaCO3 and its application in inks
Calcium carbonate nanoparticles as additives can enhance the gloss of inks,improve the dispersion of fillers and reduce the production cost.The preparation of modified nano-calcium carbonate(SS/PA/CNCC)by use of cubic nano-calcium carbonate(CNCC)as raw material and sodium stearate(SS)and palmitic acid(PA)as modifier was present in this work.The effects of SS/PA compounding ratio,addition amount and reaction temperature on the properties of SS/PA/CNCC were investigated.While the addition of SS/PA in ratio 1∶1 was 3％and the reaction at 70 ℃,the average particle size of SS/PA/CNCC were found to be 60 nm and the oil-absorption value 35 g/100 g respectively and reach the demand of ink use.SEM,FT-IR,and TG were used to analyze and characterize the SS/PA-modified calcium carbonate.The results showed that the inks added with SS/PA/CNCC at 9 parts are of good performance with a fineness of 12.5 μ m,a fluidity of 32 mm,and a gloss of 64.5 GU.
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