Zinc, chromium and iron silicates as fillers and inorganic colour pigments

Abstract
Inorganic pigments are characterized by good dispersion and high coating ability. An interesting trend in production of permanent pigment systems may involve a precipitation process followed by roasting of the silica, co-precipitated with metal oxides. The use of zinc silicate may allow elimination of zinc oxide and, partially or even completely, carbon black from rubber mixtures.

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