(toluene diisocyanate or methylbenzene diisocyanate), one of the reagents used to make polyurethanes . it is also widely used as solvent, for example, for alkyd polymers (resins) used in paints. dimethylbenzenes (xylenes) the most widely used dimethylbenzene is -dimethylbenzene (p-xylene). it is oxidised...