Organic compounds -- part of the class 532-570 series – Organic compounds – Isocyanate esters
Patent
1993-03-08
1995-01-31
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Isocyanate esters
560345, C07C26306
Patent
active
053860535
ABSTRACT:
A multistep process for the continuous preparation of organic polyisocyanates, preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to give monomeric polyurethanes and pyrolyzing the latter involves separating the resultant polyisocyanates and worthless residues in certain reaction steps and recycling the reusable by-products into earlier steps.
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Brandt Eckhardt
Magnussen Peter
Mattner Otto
Merger Franz
Otterbach Andreas
Barts Samuel
BASF - Aktiengesellschaft
Dees Jos,e G.
Marshall Paul L.
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