Preston, UK -- Incorez has enhanced the performance of aromatic polyurethane sealant prepolymers using oxazolidines, the PU coatings, sealings and dispersions company said in a 10 June news release.
The UK company said that whilst there have been a number of technical advances in the resins used in construction sealants, it found polyurethane chemistry continues to offer the best balance of cost and performance.
Incorez noted that PU chemistry is highly versatile, with aromatic and aliphatic prepolymers offering formulators a range of properties to meet differing performance requirements.
Benefits of introducing oxazolidine latent hardeners into aromatic PU sealants include eliminating gassing and retaining good workability of the sealant, Incorez said. The company also claimed oxazolidine had no significant impact on mechanical strength or shrinkage and no detrimental impact on UV resistance.