Polyfunctional silylureas were synthesized by the interaction of 3-aminopropyltriethoxysilane with isocyanates various structures in an inert aromatic solvent. Commercially available diisocyanates such as isophorone diisocyanate, hexamethylene 2,4-toluene diisocyanate used isocyanates. In this case, freshly distilled toluene was a The obtained compounds confirmed data IR and NMR1H spectroscopy....

The performance of a dry sampler, with an impregnated denuder in series with a glass fibre filter, using di-n-butylamine (DBA) for airborne isocyanates (200ml min(-1)) is investigated and compared with an impinger flask with a glass fibre filter in series (1 l min(-1)). An exposure chamber containing 1,6-hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), and 2,4- and 2,6-toluene ...

Organic coatings are extensively investigated as possible solution to prevent or at least retard the occurring of corrosion processes on metal surfaces. Their actual breakthrough is still hampered by risk barrier properties loss because local failure coating integrity. To address this issue, self-healing coatings, which intrinsically able recover from damages upon exposure external stimuli, cur...

The structures of two derivatives of the bisdioxine diisocyanate 1, the bisurea 4 and the biscarbamate 5, are established by X-ray crystallography and DFT calculations. These compounds possess endo,endo structures, in the case of the bisurea 4 with two nearly parallel pendant chains. The X-ray structures are reproduced very well by DFT calculations. Similar endo,endo conformations are calculate...

The standard sampling methods for toluene diisocyanate (TDI) only collect total TDI without separating the aerosol and gas phases. There are few other samplers, such as the dual filter, triple filter and annular denuder systems (ADS), which are able to sample the aerosol and gas phases simultaneously. This field study was conducted at two workplaces to access the total 2,4-TDI and the gaseous a...

The synthesis of aromatic diisocyanate derived from lignocellulosic raw materials, namely guaiacol and vanillyl alcohol, through phosgene-free route offers the prospect greener approaches for isocyanate production polyurethane industry.

Due to rapid economic growth, the use of plastics in almost all areas human life has significantly increased over recent decades, leading massive pollution. Therefore, works dealing with sustainable and biodegradable polymer materials are vital now. Herein, Mater-Bi/poly(ε-caprolactone) (PCL)-based biocomposites, filled diisocyanate-modified cellulose particles, were prepared subjected 12-week ...

Polyurethanes are widely used in car paint formulations. During thermal degradation, such polymeric systems can generate powerful asthmatic sensitizing agents named isocyanates. In body repair shops, the thermal degradation of car paint can occur during abrasive processes that generate enough heat to involve release of isocyanates in air. An environmental monitoring study was performed in two b...