Investigation of filled composite materials is connected with polymer adsorption on a solid surface. Studies of adsorption from polymer solutions on solid surfaces are mainly aimed at revealing how the value of adsorption depends on the thermodynamic quality of the solvent, polymer concentration in the solution, molecular mass and molecular-mass distribution of polymer, temperature, nature of adsorbent, and surface charge and charge density, in polyelectrolytes. The adsorption systems containing macromolecules and dispersed particles of the solid phase are rather complex, because they have features of both lyophobic and lyophilic disperse systems.We studied adsorption of polystyrene with molecular mass 5.7 × 10⁵ from a solution in toluene on three samples of commercial-grade carbon: TM-15, TM-50, and TM-75 with specific surface area equal to 15, 50 and 75 m²/g, respectively, under various experimental conditions. The carbon powder was preliminarily dispersed in a particular volume of solvent, and this dispersion was mixed with an equal volume of solution and a double concentration of polymer.Preliminary dispergation of technical carbon in solvent influences on an adsorption process. In this connection the solvent concentration, under which non-separated technical carbon particles are appeared, is decreasing.