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Rodys K is an aqueous solution of sodium salts of naphthalene sulfonic acid and formaldehyde polycondensates. It is a low-viscosity, brown-coloured liquid, and among the Rodys product series it is distinguished by the lowest degree of polymerization. The product neither has an environmental classification, nor does it 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 sulfone group. Due to its structure, it has dispersing properties, adsorbing onto solid particles. It forms a layer of unipolar electric charges on them and their mutual repulsion causes agglomerates breakdown.Rodys K was created for the needs of the rubber industry, and is mainly used in the emulsion polymerization process of styrene-butadiene rubber (SBR). Its chemical structure and physicochemical parameters favour the formation of colloidal systems in water, creating a stable dispersion in time. The product is compatible with other additives used in the polymerization process. A small addition of Rodys K causes 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 (e.g. Mooney viscosity, polydispersity, vitrification temperature) and mechanical (tensile strength, elongation at break) properties. In addition, the presence of Rodys K in the reaction system does not adversely affect the polymerization rate.Rodys K is mainly recommended as the dispersant used in the production of styrene-butadiene rubber using the emulsion method. However, it can also be used in emulsion polymerization processes of other types of rubbers, and to disperse particles in various types of aqueous suspensions.

Properties and applications

allows obtaining latex stable dispersions during polymerization;
inhibits the formation of coagulates of latex particles during both polymerization and degasification;
does not slow down the polymerization reaction rate;
does not adversely affect the physicochemical or mechanical properties of the produced rubber;
intended mainly as an aid in the production of styrene-butadiene rubbers by emulsion polymerization;

Manufacturer: PCC Rokita SA

PCC Rokita SA is one of the largest chemical companies in Poland as well as Central and Eastern Europe. Its activity includes the production of chloroalkali, polyether polyols, polyalkylene glycols and phosphorus derivatives.

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PCC Group

Rodys K

Manufacturer: PCC Rokita SA

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