Dyspergator Oskar is an aqueous solution of the sodium salt of polycondensate of naphthalene acids with formaldehyde. It is a low-viscosity liquid with a brown colour, its great advantages are the low concentration of free formaldehyde and free naphthalene. As a result, it does not have an environmental classification and does not contribute to increasing the concentration of polycyclic aromatic hydrocarbons in the products for which it is used.
It is a surfactant composed of a hydrophobic organic chain and a hydrophilic inorganic sulfone group. Due to its structure, it has dispersing properties, adsorbing onto solid particles. On them, it forms a layer of homonymous electrical charges (sulfone groups) whose mutual repulsion causes the breakdown of agglomerates.
Dyspergator Oskar was created for the needs of the rubber industry and is mainly used in the emulsion synthesis process of styrene-butadiene rubber (SBR). Its chemical structure and physicochemical parameters favour the creation of colloidal systems of solids in a continuous liquid phase (water), creating a time-stable dispersion. The product is compatible with other additives used in the process, e.g. an emulsifier or a redox stabilizer.
A small addition of Dyspergator Oskar produces very good dispersion of latex particles formed in the process in the aqueous phase. This prevents the formation of coagulates during both polymerization and degasification. Thus, styrene-butadiene rubber is obtained with the desired physicochemical properties (e.g. Mooney viscosity, polydispersity, vitrification temperature) and mechanical (tensile strength, elongation at break) and the time spent cleaning the production plant (e.g. degassing columns) is saved. In addition, the presence of Dyspergator Oskar in the reaction system does not adversely affect the polymerization rate.
Dyspergator Oskar is mainly recommended as the dispersant used in the production of styrene-butadiene rubber using the emulsion method. Nevertheless, it can also be utilized in emulsion polymerization processes of other types of rubbers.