Archives: Perguntas

TDI Esther This PU will operate because it offers: – High resistance to solvents and oils – Good properties and low hardnesses

It is lighter; Less noise in service; Resistance to corrosion; Manufacture with lower cost; Non-conductive; Resistance to impacts; It does not generates sparks due to friction.

– Work in high temperature (It could generate Hysteresis); – Humid and warm environments (It could cause Hydrolysis);

Resistance to the abrasion; Resistance to cut and tearing; Resistance to oils/non-absorption; High dynamic characteristics; Wide range of hardnesses; Clarity and translucency; It does not leave marks or blots; Versatility

  Not breakable (including in high hardnesses); Elastomeric Memory (after suffering great torsion, they return to its initial condition); High resistance to the Abrasion.  

– Reduction of costs – Resistance to the abrasion – It reduces the number of machine downtime for maintenance. – It supports heavy loads – Resistance to tearing The PUs are being a great alternative in many applications, substituting Metal, Plastic and Rubber.

A wide range of polyols is associated to TDI, MDI and NDI in the manufacture of PU’s. The polyether polyol is the most frequently used and is obtained through the polymerization of propylene, ethylene and butylene oxides. The most used are polyglycol (propylene oxide) and copolymers of polyglicols ((PPG’s) (propylene/ethylene oxides). The polyether polyols, such […]

MDI is the abbreviation of Diphenyl Methane Di-isocyanate Obtained from reaction of aniline with the formaldehyde, it produces mixed isomers of functionality 2.0 to 3.0. The attainment of MDI of ideal productivity implies extra processes, influencing the cost of material. This explains the different offers found in the market, as well classifications of low, medium […]

TDI is the abbreviation of Toluene Diisocynate It is manufactured through the nitration of Toluene, getting a mixture of ortho, meta and para-nitrotoluene isomers. The separation of these isomers is accomplished by fractional distillation causing 80/20, 65/35 and pure mixtures. The market offers then TDI’s of different reactivity and costs, with implication in the quality […]