Priplast 3195 Dimer acid-based polyester polyol Uniqema PU - Polyols >> Polyester ADHESIVE >> Hot-melt ADHESIVE >> Solvent based ADHESIVE >> Radiation Curing (UV/EB) ADHESIVE >> Water-based Priplast dimer acid-based polyester polyols Resistance to hydrolytic attack by moisture, alkali or acid Resistance to radical-type attack via heat, oxygen, UV or chlorine Adhesion to low-energy surfaces Excellent flow properties with efficient substrate wetting Flexibility with good impact strength Uniqema’s process knowledge allows tight control of production to give a wide range of Priplast polyester polyols with varying properties and applications (See Table 1). Resistance to hydrolytic attack Hydrolytic stability is a weakness of most well known polyesters used in the polyurethane industry, e.g. adipate esters and polycaprolacton. The use of dimerised fatty acids to build the polyester diols at the heart of the Priplast system gives a very hydrophobic environment with a low level of vulnerable ester bonds. This chemistry leads to excellent hydrolytic stability that brings with it resistance against attack by acids, alkali and alcohol in addition to excellent thermal stability. These superior performance characteristics are demonstrated in Figure 1. The Priplast formulations are clearly more stable than thermoplastic polyurethane samples made with ethylene glycol or butane diol adipate after prolonged exposure to heat, alkali, acid and alcohol. Priplast also gives superior resistance to oxidation, ultraviolet degradation and chlorine compared to polyethers such as PPG and PTMEG. Adhesives Heat & moisture resistance The introduction of new heat and moisture resistance performance standards for adhesives, for example the “Jungle test”, in automotive and footwear applications, fit well with the enhanced properties offered by Priplast formulations described previously. These characteristics also suit the material for use in sealant and encapsulant applications in industries such as electronics. Adhesion to non-polar substrates A particular benefit for adhesive formulation is the ability of Priplast to adhere to non-polar, low energy substrates such as polyolefins. These cheaper materials are increasingly popular but pose substantial problems with adhesion. The superior adhesion of Priplast formulations to untreated high-density polyethylene is demonstrated in Figure 3 in comparison to adipate or polyether based adhesives. The good flow and flexibility properties of the dimerate polyols lead to good wetting characteristics and efficient coverage of the substrate – another key benefit in adhesive applications. Successful formulation of Priplast dimerate polyols has been demonstrated in polyurethane hot melt adhesives, aqueous dispersion adhesives, solvent-borne adhesives and radiation curable adhesives. Priplast 3195 hydrolytic/thermal/oxidative stability pu coatings and adhesives (textile, wood, leather), leather finishing Dimer acid-based polyester polyol. Used in polyurethane hot melt, aqueous dispersion, solvent-borne and radiation curable adhesives for textile, wood and leather industries. Provides resistance to hydrolytic attack by moisture, alkali or acid, to radical-type attack via heat, oxygen, UV or chlorine,. Offers adhesion to non-polar, low energy substrates such as polyolefins, very good flow properties, efficient substrate wetting, flexibility, and good impact strength.