A method for producing a dispersion of deagglomerated barium sulphate in plastics or plastic precursors

The invention discloses a method for incorporating deagglomerated barium sulphate an average primary particle size of less than 0.5 micrometers, which is coated with a dispersant, in plastics precursors, z. As in polyols. The deagglomerated barium sulphate is dispersed in an organic solvent such Alkohl incorporated in the precursor and the solvent evaporated.