Abstract: The algorithm of the synthesis of composite materials is derived on the base of representation of composites as complex systems with modular structure. The adjustment of the PATTERN method for the algorithm is performed during design (which is based on system approach) of the radiation-protective composites. The concept development of materials with special properties based on the study of kinetic processes of structure formation and basic physical and mechanical characteristics of the material is proposed. The conditions of formation of floccula and sedimentation stability in disperse systems (visualization of configuration and dynamics of particle).