Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1987-01-02
1990-09-25
Higel, Floyd D.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564 61, 528196, C08G 7100, C08G 7102, C08G 7104
Patent
active
049594990
ABSTRACT:
Novel polyahls having backbones containing urea, urethane and polyamine moieties and hydroxyl and/or amine terminal groups are prepared by contacting a polyamine such as an aminated polyether polyol or hexamethylene diamine with a cyclic alkylene carbonate such as propylene carbonate under conditions sufficient to form the polyahl and a monoalkylene glycol. The monoalkylene glycol is removed from the reaction mixture in order to drive the reaction to completion.
Such polyahls are useful in the preparation of isocyanate-functional prepolymers and polyurea/polyurethanes. The latter are suitably employed as flexible and rigid foams, coatings, RIM elastomers and other applications where conventional polyurethanes are employed.
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Higel Floyd D.
The Dow Chemical Company
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