نتایج جستجو برای: isocyanates
تعداد نتایج: 1001 فیلتر نتایج به سال:
the isocyanates are widely used as precursors of polyurethane products, as well as carbamate insecticides. toluene 2,4-diisocyanate (tdi) is one of the most important commercially used isocyanates. humans may be exposed to tdi by inhalation, ingestion, dermal and eye contact. tdi is a powerful irritant to the mucosal membranes of the gastrointestinal and respiratory tracts, eyes and the skin. p...
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....
Cytokine profiling of local lymph node responses has been proposed as a simple test to identify chemicals, such as low molecular weight diisocyanates, that pose a significant risk of occupational asthma. Previously, we reported cytokine messenger RNA (mRNA) profiles for dinitrochlorobenzene (DNCB) and six isocyanates: toluene diisocyanate, diphenylmethane-4,4'-diisocyanate, dicyclohexylmethane-...
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 ...
The addition reaction of aryl- and alkenylboronic acids to isocyanates is catalysed by a rhodium(I) complex, affording secondary amides under mild conditions.
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