Process for the production of polyisocyanates having a biuret st

Details Process for the production of polyisocyanates having a biuret st Process for the production of polyisocyanates having a biuret st

1981-02-12

1982-03-16

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604651, 2604658R, C07C12724

Patent

active

043200680

ABSTRACT:
This invention relates to a new process for the production of polyisocyanates having a biuret structure by reacting aliphatic or cycloaliphatic diisocyanates with sub-stoichiometric quantities of specified aldoximes. When aldoximes are used as the biuretizing agents insoluble ureas are not formed during the reaction and nitriles which are easy to handle and distill are formed as secondary products.

REFERENCES:
patent: 3124605 (1964-03-01), Wagner
patent: 3358010 (1967-12-01), Britain

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