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.
Naphthalenesulfonic acid, polymer with formaldehyde, sodium salt (aqueous solution), NSF, SNF, PNS, Sodium salt of polycondensates of naphthalene sulfonic acid with formaldehyde
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.
All the above information related to the product are provided according to the best knowledge of the manufacturer and published in good faith. However, the manufacturer does not guarantee the information and contents of this document are complete and accurate, and shall not be liable for the results of using them. The user is obliged to verify and confirm the information and contents of this documentation on his/her own. The manufacturer reserves the right to change the content of this document at any time without stating reasons of such changes.
ISO 14001 
ISO 50001 
ISO 9001 
ISO 45001 
