Surface-modified microporous talcs as fillers of polymers and pigments

Abstract

We present four modification methods for previously micronized Korean talcs using surfactants, polyoxyethylene glycols, silane and titanate coupling agents. The modifications provide an increase of activity of the talc towards polymers. After the modifications, the wettability of the talcs in water and benzene were measured by a calorimetric technique. A correlation between the heat of immersion and the coverage of the talc surface has been determined. Attempts were made to apply the modified Korean talcs in rubber mixtures (with butadiene–styrene rubber), in PVC and in highly dispersed pigments.