Abstract: The present invention relates to compositions containing a polycarbonate including a bisphenol compound and an effective amount of a bishaloformate component present in an amount sufficient to reduce the average unbound bisphenol compound level found in water after immersion in deionized water for two weeks at 40° C. of the composition to less than about 20 ppb. Also provided are methods for increasing the water resistance of a polycarbonate composition. The method involves adding an effective amount of a bishaloformate component to the polycarbonate composition such that the polycarbonate composition has an average unbound bisphenol compound level found in water after immersion in deionized water for two weeks at 40° C. of less than about 20 ppb.

Abstract: A method for making an aliphatic diisocyanate by (a) phosgenating an aliphatic diamine in the presence of an inert solvent or gas to form a crude reaction mixture; (b) distilling the crude reaction mixture to form an aliphatic diisocyanate production stream and an aliphatic diisocyanate waste stream; (c) introducing the aliphatic diisocyanate waste stream to a chamber and placing the waste stream under supercritical fluid conditions sufficient to dissolve an appreciable amount of the aliphatic diisocyanate component in the supercritical fluid; (d) separating the dissolved aliphatic diisocyanate component from the waste stream, wherein the remaining waste stream is a supercritically-purged aliphatic diisocyanate waste stream; (e) lowering the pressure sufficiently to precipitate the aliphatic diisocyanate component.