The invention discloses a preparation method of a
barium sulfate pre-dispersed master batch and a
barium sulfate filled
polyolefin elastomer material, and the preparation method comprises the following steps: (1) preparing a
barium sulfate surface treatment auxiliary agent which comprises a block
copolymer composed of
methoxypolyethylene glycol and
methyl methacrylate in a
molar ratio of 1: (1-4), and the theoretical molecular weight of the
barium sulfate surface treatment auxiliary agent is 300-600; (2) mixing
barium sulfate powder with the
barium sulfate surface treatment aid, stirring and mixing at a high speed, then putting into a high-temperature environment for binding reaction, and stirring at a high speed to obtain surface-treated barium sulfate
powder; and (3) preparing an SEBS solution, adding the barium sulfate
powder subjected to surface treatment into the SEBS solution, stirring and mixing, pouring the
mixed solution into boiling water to remove the
organic solvent to form a master batch, and
drying to obtain the barium sulfate pre-dispersed master batch. The method provided by the invention can ensure sufficient dispersion of barium sulfate, better maintain the molecular structure of the carrier
polymer, and improve the performance of the barium sulfate filled
polyolefin elastomer material.