Dyspergator SBRP is the powder form of the Dyspergator Oskar, i.e. the sodium salt of polycondensate of naphthalene acids with formaldehyde (NSF). The advantages of this product are low concentrations of free formaldehyde and free naphthalene. This means that 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 also distinguished by low content of calcium and iron ions.
It is a surface-active compound made of a hydrophobic (organic chain) and hydrophilic (inorganic sulfone group) part. 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 SBRP 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 SBRP 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. The styrene-butadiene rubber obtained in this way has the desired physicochemical properties (e.g. Mooney viscosity, polydispersity, vitrification temperature) and mechanical (tensile strength, elongation at break). In addition, it saves time spent cleaning the production plant (e.g. degassing columns). In addition, the presence of Dyspergator SBRP in the reaction system does not adversely affect the polymerization rate.
The main application of Dyspergator SBRP is emulsion polymerization of styrene with butadiene. It can also be used in emulsion polymerization processes of other types of rubbers. Because it is available in a powder form with low moisture content and low bulk density, its transport and storage are financially advantageous.