C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
260/455.3
C08G 18/80 (2006.01) C07C 273/18 (2006.01) C08G 18/78 (2006.01) C07C 275/62 (2006.01)
Patent
CA 1077956
Abstract of the Disclosure This invention relates to an improved process for the preparation of polyisocyanates which contain biuret groups by the direct reaction of polyamines in vapor form with polyisocyanates.
271671
Hetzel Hartmut
K"onig Klaus
Schmelzer Hans G.
Wagner Kuno
Aktiengesellschaft Bayer
Na
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