Preparation method of aromatic acid salt-MBS composite toughening modifier

The invention discloses a preparation method of an aromatic acid salt-MBS composite toughening modifier. The preparation method comprises the following steps: step one, preparing a solution of solublearomatic acid salts; step two, picking MBS emulsion; step three, adding a solution of soluble target metal salts into a mixed solution of aromatic acid salts and MBS emulsion; step four, carrying outreactions, wherein emulsion breaking reactions of MBS and aromatic acid salt precipitation reactions happen simultaneously; and step five, obtaining a target product. The target product is aromatic acid salt rigid particles, which are wrapped by MBS elastomer and have a core-shell structure, and the average particle size of the rigid particles is less than 10 [mu]m. The preparation method solvesthe problem of agglomeration of aromatic acid salts during the production and storage process, reduces the particle size, improves the compatibility between aromatic acid salts and resin, promotes uniform distribution of MBS in