| http://www.w3.org/ns/prov#value | - Preferred aliphatic diisocyanates include 1,4-cyclohexyl diisocyanate; 4,4'-isopropylidene-bis-(cyclohexyl isocyanate); and other dinuclear cycloaliphatic diisocyanates formed through an alkylidene bridging group of from 1 to 3 carbon atoms which can be ring substituted with nitro, chloro, alkyl, alkoxy and other groups; and preferably are liquid at room temperature.
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