Table 1: Physical properties of the used mineral fillers.

Inorganic fillerChemical formulaDensity
(g/cm3)
Mohs
hardness
Particle
shape
Surface area
BET (m2/g)
pH

Mica SGa dX2Y4-6Z8O20(OH,F)42.92.5Platy711
Natural Zeoliteb(Ca,K2,Na2,Mg)4Al8Si40O96 24 H2O)2.32Blocky137
VansilcCaSiO32.94.5Acicular49

aAspanger Bergbau und Mineralwerke.
bIFA, Tulln, Austria.
cVansil, C. H. Erbslöh.
dX is K, Na, Ca, Ba, Rb or Cs; Y is Al, Mg, Fe, Mn Cr, Ti or Li; Z is Si, Al, Fe3+ or Ti.