Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1985-05-28
1986-12-30
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544221, 544222, C07D25134
Patent
active
046329897
ABSTRACT:
Disclosed are novel compositions capable of catalytically trimerizing organic isocyanates said compositions comprising solutions of the reaction products obtained by reacting in an inert solvent in substantially equimolar proportions electron-rich ketene-aminals with electron-poor olefins having the respective formulae (I) and (II) ##STR1## The variously substituted electron-rich ketene-aminals (I), as the name implies, have high electron density associated with the double bond because of the two tertiary amine groups while the electron-poor olefins (II) have the opposite situation due to the presence of electron withdrawing substituents R.sub.9 and R.sub.10.
Also disclosed is an improved process for trimerizing organic isocyanates using the above catalyst compositions including the preparation of polyisocyanurate polymers and isocyanurate-modified polyisocyanates.
REFERENCES:
patent: 3330828 (1967-07-01), Grogler et al.
patent: 4111914 (1978-09-01), Kresta et al.
patent: 4145544 (1979-03-01), Kuehn
patent: 4491663 (1985-01-01), Kordomenos
patent: 4540781 (1985-09-01), Barsa
Gompper et al., Angewandte Chemie, Int. Ed., 6, 453 (1967).
Ford John M.
Rose James S.
The Dow Chemical Company
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