Rokpen SU25 is a speciality additive used in the tanning industry. It acts as a regulator of the penetration of anionic acrylic water dispersion (Rokryl SU25) into the surface layer of leather. The product is an aqueous dispersion of a non-ionic surfactant and organic solvent. It has the form of a clear liquid with a colour ranging from colourless to pale yellow. The product is non-flammable.
The product is characterized by high solubility in water at any ratio. It is also soluble in ethanol. Rokpen SU25 is resistant to electrolyte solutions, i.e. ammonia water, formic acid and sodium chloride.
It is miscible with the auxiliary agents used in the tightening preparations for the non-bath leather tightening process, as well as with all the additives used in the finishing process. Rokpen SU25 has a solidification point at -10°C. Below this temperature, it freezes, and after thawing and mixing it returns to its original state without losing its functional properties.
The product ensures reduction of surface tension and quick wetting of the leather surface, which facilitates the penetration of a water-based tightening dispersion. The solvent contained in Rokpen SU25 may cause partial degreasing of the leather surface. In some cases, especially when firm leather requires large amounts of Rokpen SU25, it may cause roughness of the material. This is effectively counteracted by the addition of Roksol STE.
The grain tightening preparation based on Rokryl SU25 and Rokpen SU25, gives a foundation that strengthens the grain without hardening the leather and reducing the adhesion of the subsequent covering layer.
Leather impregnated with this unique set of products is characterized by the following features:
smooth, homogeneous, non-sticky surface, easily sanded and pressed,
Aqueous solution of nonionic surfactant and diacetone alcohol, A mixture of surfactants with diacetone alcohol, graveyard additive, dispersion penetration regulator, leather conditioner with improved grain, Rokryl SU25 penetration depth regulator.
Manufacturer: PCC Exol SA
PCC EXOL SA is one of the most important manufacturers of surfactants and chemical formulations in Central and Eastern Europe. The company offers surfactants, specialist additives and chemical formulations for many branches of industry.
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 
