Organic compounds -- part of the class 532-570 series – Organic compounds – Isocyanate esters
Patent
1992-02-14
1992-12-29
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Isocyanate esters
521163, 560330, C07C26320
Patent
active
051753502
ABSTRACT:
The present invention is directed for preparing a 4,4'-diisocyanato dicyclohexylmethane which contain a relatively high amount of the trans,trans-isomer. The process broadly comprises (a) melting a mixture of 4,4'-diisocyanato dicyclohexyl-methane isomers, (b) cooling the melted mixture to form: (1) a liquid phase and (2) a solid phase, (c) removing said liquid phase, which is a commercially viable product itself, (d) heating the solid phase and removing that portion of the solid phase which has melted, and (e) recovering that portion of said solid phase which has not melted by heating the remaining portion.
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Dunlap Kenneth L.
Lowery Michael K.
Potter Terry A.
Seneker Stephen D.
Brown N. Denise
Clarke Vera C.
Dees Jos,e G.
Gil Joseph C.
Miles Inc.
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