| 摘要 |
New bis-(1'- gamma -isocyanatopropylhydantoinyl-3')-alkanes, for example 1,6-bis-[1'-(- gamma -isocyanatopropyl)-5',5'-dimethylhydantoinyl-3']-n-hexane and 1,1'-methylene-bis-(3- gamma -isocyanatopropylhydantoins), for example 1,1'-methylene-bis-(3- gamma -isocyanatopropyl-5,5-dimethylhydantoin), and their use for the manufacture of polyurethanes by reaction of the new diisocyanates with polyhydroxyl compounds. The new diisocyanates are completely odorless and an irritation of the mucous membranes by these new diisocyanates has hitherto not been observed. The new diisocyanates are therefore preferentially used in the lacquer field.
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