44816-77-5Relevant academic research and scientific papers
Decolorization of polyalkylene polyamines
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, (2008/06/13)
A process for decolorizing polyalkylene polyamines, which comprises contacting one or more polyalkylene polyamines having an average molecular weight of greater than about 200 and less than about 1000 with carbon at a temperature greater than or equal to about 100° C. and less than or equal to about 300° C. under conditions effective to reduce the color rating of the one or more polyalkylene polyamines.
Process for the preparation of polyisocyanates which contain biuret groups
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, (2008/06/13)
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.
