Abstract <p>The study of rheokinetic characteristics is one of the most important stages in the development of new formulations of modified polymeric materials. Examining the specifics of the curing process of compositions makes it possible to assess component compatibility and the influence of various additives on a set of technological and performance properties. When developing polymer composite materials modeled after natural layered materials with weak interfaces (wood, shells, certain types of mica, etc.), an important technological task is to preserve, by means of applied modifiers, an original liquid aggregate state with the formation of an independent liquid phase within the composite structure (in this work, these modifiers are referred to as liquid-phase materials; triethylene glycol dimethacrylate and a silicone sealant are used as examples). The role of liquid-phase materials, arranged in the composite structure according to specified reinforcement schemes, is to avoid defect accumulation under deformation and to provide stress relaxation. Therefore, when designing a polymer composite composition with a two-phase reinforcement scheme, one of the key criteria for selecting a liquid-phase material is the absence of chemical interaction with the binder material. In this paper, using rotational viscometry, the influence of triethylene glycol dimethacrylate and a silicone sealant on changes in the rheokinetic characteristics of the ED-20 epoxy binder with the amine hardener PEPA is studied at +40, +60, and +80°C. It is found that adding these materials to the epoxy binder in the amount of 20 parts by mass per 100 parts by mass of the epoxy composition does not lead to a significant change in gelation time, viscosity growth constants, or activation energies, which indicates the absence of chemical interaction between the components.</p>