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Chemical name:

Polyoxyalkylene sorbitol


polyurethanespolyether polyols

Markets and applications:

building & constructioninsulation boardpipe-in-pipe insulationsandwich panelsthermal & acoustic spray systemswire & cable insulationrefrigeration industry and household appliancesboilersindustrial coolersrefrigerators


rigid foamsblock foamscasting foamsspray foams


polyether polyolssorbitol polyols


PCC Rokita SA Polyols Business Unit

CAS No.:



Rokopol® RF551 is a general purpose sorbitol based polyether polyol for production of rigid and semi-rigid polyurethane foam (PUR) in reaction with isocyanate. The product has liquid form, ranging from transparent to yellow colour, containing BHT free antioxidants. It retains low viscosity of ca. 3000-5000 mPas with relatively high functionality f=4.5 and high hydroxyl value of ca. 440mgKOH/g.

The unique structure of Rokopol® RF551 and the physicochemical parameters required in the PUR systems determine its use for a wide range of rigid polyurethane foam applications. Rokopol® RF551 is used in combination with other polyols and additives in order to modify the properties of the PUR system, in particular the following: viscosity, reactivity, gelling, crosslinking level, and the rigid foam end product parameters: i.e. adhesion to various substrates, flame-retardant level, hardness, abrasiveness, closed cell contents (insulating properties). The product can be used in a wide range of construction industry applications.


Most frequent applications of Rokopol® RF551:

  • The product provides long gelling times of PUR foam systems;
  • Very good mechanical parameters and high foam rise values;
  • The product can be easily combined with other polyols in order to modify the PUR system properties;
  • Very good resistance to extreme temperatures – from very high temperatures to ca. -35°C;


Most frequent applications of Rokopol® RF551:

  • closed cell foam for thermal and cooling insulation;
  • foam used for insulation of pipelines, wires and cables;
  • thermal and acoustic spray insulation systems;
  • component of sandwich panels and insulation panels

Product manufactured based on Rokopol® RF551 are of excellent quality. Based on to the optimally developed manufacturing process this polyol is distinguished by very good parameters, and not only for PUR applications.


Properties and applications:

  • Very high quality of the end product based on the physicochemical properties of the polyol;
  • Applied in closed cell foams designed mainly for construction industry insulation systems;
  • Used as a component for production of sandwich panels and insulation panels;
  • Marked by very good mechanical and thermal insulation parameters, the product provides long gelling times of the PUR foam systems PUR;
  • Perfectly suitable both for high temperatures (up to c. 120°C) as well as low temperatures (to -35°C);

Alternative names:

Sorbitol based; sorbitol; sugar based; sugar polyol; glucidol; sorbogem; sorbo; (2S,3R,4R,5R)-Hexane-1,2,3,4,5,6-hexol; sorbitol polyoxypropylene ether; sorbitol propoxylated polyol; sorbitol alkoxylated polyol;