Dyspergator RP is the powder form of Dyspergator R, i.e. the sodium salt of polycondensate of naphthalene acids with formaldehyde (NSF). The undeniable advantages of this product are the low concentrations 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 also distinguished by low content of calcium and iron ions.
Dyspergator RP is a surface-active compound composed of an organic chain (hydrophobic group) and a sulfone group, which is the hydrophilic part of the molecule. This structure translates into its dispersing properties, i.e. the formation of most often colloidal systems and non-coagulant suspensions of solids in a continuous liquid phase (water). Dyspergator RP particles, adsorbing onto solid particles, form on them a layer of homonymous electrical charges (sulfone groups). Their mutual repulsion causes the disintegration of agglomerates of these particles and their even dispersion in the continuous phase of the system.
Dyspergator RP, which is the equivalent of Dyspergator R, was designed for the needs of the rubber industry and is mainly used in the emulsion polymerization process of styrene and butadiene leading to the production of styrene-butadiene rubber (SBR). Its chemical structure and physicochemical parameters favour the creation of colloidal systems of solids in a continuous liquid phase, creating a time-stable dispersion. The product is compatible with other additives used in the process, e.g. an emulsifier or a redox stabilizer.
Dyspergator RP used in small amounts produces very good dispersion of latex particles formed in the production process in the aqueous phase. This prevents the formation of coagulates during both polymerization and degasification. It also does not adversely affect the physicochemical properties (e.g. Mooney viscosity, polydispersity, vitrification temperature) and mechanical (tensile strength, elongation at break) of the obtained styrene-butadiene rubber, as well as the speed of the polymerization reaction. An additional advantage of using Dyspergator RP is saving time spent on cleaning the production installation (e.g. degassing columns) due to the very low concentration of latex coagulates.
The main application of Dyspergator RP is emulsion polymerization of styrene with butadiene. Nevertheless, it can also be utilized 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.