Use of copolymers of styrene and maleic anhydride as dispersants and / or treatment of inorganic fillers. Thermoplastic compositions containing

Use of copolymers of styrene and maleic anhydride with an average molecular weight between 1000 and 3000 and particularly between 1500 and 2000 as a dispersing agent and / or treatment of powdery inorganic fillers or basic surfaces having free hydroxyl groups in the resins thermoplastics, homopolymers without aryl group only carbon skeleton or copolymers without aryl group and composed of carbon and oxygen of which the content of oxygen atoms does not exceed 22% by weight or mixtures thereof. thermoplastic compositions strongly charged, stable, and homogeneous fluids containing said agents and application of these compositions in the manufacture of plastic products.