Anionic polyurethane dispersants APUDs were used as dispersing agents in formulation of waterborne paints. The APUDs were synthesized by three steps. In the first step, macromonomer diisocyanate having carboxylic acid was prepared by isophorone diisocyanate IPDI, dimethylol propionic acid DMPA in presence of acetone as solvent and dibutyltin dilaurate DBTDL as catalyst. Then, carboxylic polyure...

induced by toluene diisocyanate. Am Rev Respir Dis, 1987, 136, 36-42. 8. Boschcuo P, Fabbri LM, Zocca E. Milani OF, Pivirotto P, Dal Vecchio A, Plebani M, Mapp CB. Prednisone inhibits late asthmatic reactions and airway infli!Jllmation induced by toluene diisocyanate in seruitiz.ed subjects. J Allergy Clin lmmunol, 1987, 80, 261267. 9. Fabbri LM, Di Giaromo R. Dal Vecchio L, Zocca E, De Marzo N...

In recent years, occupational asthma has become the most frequent occupational lung disease in many countries. Reports and statements on the frequency of occupational asthma due to isocyanates are quite contradictory. In order to clarify the issue, a critical review of the medical literature of the past half century worldwide has been performed, with special emphasis on toluene diisocyanate (TD...

PURPOSE OF REVIEW Diisocyanates are the leading cause of occupational asthma, the most commonly reported lung disease associated with the workplace. Clinical studies have implicated the immune system in the pathogenesis of occupational asthma, but ethical and moral issues prevent mechanistic investigations in humans. For this reason, the development and characterization of animal models are ger...

An adapted method for the quantitative determination of isocyanates in air was implemented and validated in-house. The method was based on air sampling using an impinger flask containing di-n-butylamine (DBA) in toluene and a glass fibre filter in series. The DBA derivatives were determined using liquid chromatography and tandem mass spectrometry. Studied isocyanates were isophorone diisocyanat...

aqueous polyurethane dispersions (puds) have recently emerged as important alternatives to their solvent-based counterparts for various applications due to increasing health and environmental awareness (green chemistry). anionic polyester-polyurethane dispersions were synthesized by three steps. in the first step, macromonomer diisocyanate having carboxylic acid was prepared by isophorone diiso...

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....

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...