Polar minerals

Piqua Minerals Filler 30, 60, 70, 200, 300, 600, 1800 - dry ground limestone of particle size increasing with grade number Polar Minerals, Mt. Vernon, IN, USA... 

With non-polar minerals such as talc, mica and coal, the particle surfaces can interact with the non-polar portion of the molecules by van der Waals force. In this case, hydrocarbon portions can function as mineralophilic groups. Except in the case of depressants or some flocculants, the non-polar portions of long hydrocarbon chains in flotation agents possess only the framework formed from C-H groups with linking to polar hydrophilic and minerophilic groups [4]. 

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