Preparation And Application Of Nano-calcium Carbonate

As an inorganic functional material,nano-calcium carbonate has been widely used in many industrials,but different industrials have different performance indicators requirement,meaning that nano-calcium carbonate enterprises must focus on technology research and development to produce various functions and performance products which are suitable for different industrials.This paper firstly prepare nano-calcium carbonate in laboratory through controlling Ca O calcined degree,initial temperature of carbonization process,the second carbonization duration,the kind and amount of surface treating agent,moisture content,and testing the most important performance indicators in PVC plastisol and silicone sealant systems,to find out suitable craft and provide reference in industrial production.Result shows a little un-calcined Ca O,25? of initial temperature,2~5min of second carbonization duration,type A surface treating agent,below 0.5% of moisture content is suitable for PVC plastisol used nano-calcium carbonate,and moderate calcined Ca O,25? of initial temperature,2~5min of second carbonization duration,type B surface treating agent,below 0.5% of moisture content is suitable for silicone sealant used nano-calcium carbonate.Based on results from laboratory and the equipment and technology from annual 15,000 tons of nano-calcium carbonate production line,the author researches on PVC used and silicone sealant used nano-calcium carbonate.Through fixing nano-calcium carbonate,Ca O calcined degree and Ca O calcined degree,and changing the second carbonization duration and surface treating agent additive amount to explore the relationships between variables and nano-calcium carbonate performance.The result shows controlling the second carbonization duration and amount of surface treating agent,we can acquire nano-calcium carbonate with different scale of rotary viscosity and yield value,and different scale of oil-absorbed value and extrusion property.The production enterprises can choose suitable technology solution according to customers' demands.Besides,this paper expatiates the application of nano-calcium carbonate in plastic,rubber,adhesive,coating,ink,papermaking industrials,and provides nano-calcium carbonate technology indicators in this fields.