| 摘要 |
THE INVENTION DISCLOSES A DISPERSION OF DEAGGLOMERATED BARIUM SULPHATE HAVING AN AVERAGE PRIMARY PARTICLE SIZE OF < 0.5 μM AND COATED WITH A DISPERSANT IN DEFINED ORGANIC SOLVENTS, ESPECIALLY HALOGENATED SOLVENTS SUCH AS DICHLOROMETHANE. THE DISPERSANT PREFERABLY HAS REACTIVE GROUPS WHICH ARE ABLE TO INTERACT WITH THE SURFACE OF THE BARIUM SULPHATE; PARTICULARLY PREFERRED DISPERSANTS ARE THOSE WHICH ARE ABLE TO ENDOW THE BARIUM SULPHATE WITH A HYDROPHILIC SURFACE AND WHICH HAVE REACTIVE GROUPS FOR COUPLING TO OR INTO POLYMERS. THE DISPERSION LENDS ITSELF VERY WELL TO INCORPORATION INTO POLYMERS SUCH AS ACRYLATES, METHACRYLATES, OR PARTICULARLY INTO HYDROPHOBIC POLYMERS SUCH AS POLYCARBONATE, OR PRECURSORS THEREOF.
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