Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1981-12-23
1984-12-11
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544222, 524100, 528423, 528 73, C07D25134, C08G 7306, C08G 1828, C08G 1870
Patent
active
044879288
ABSTRACT:
The present invention thus relates to a process for the preparation of polyisocyanates having isocyanurate groups by the trimerization of part of the isocyanate groups of organic polyisocyanates or of mixtures of di- and mono-isocyanates in the presence of basic compounds as trimerization catalysts, with termination of the trimerization reaction by the addition of a catalyst poison, characterized in that the trimerization catalysts used are 1:1-complexes of (i) basic sodium or potassium compounds and (ii) 1,4,7,10,13-pentaoxacylopentadecane or 1,4,7,10,13,16-hexaoxacyclooctadecane.
This invention also relates to solutions suitable as catalyst components for this process, comprising 1:1-complexes of (i) basic sodium or potassium compounds and (ii) 1,4,7,10,13-pentaoxacyclopentadecane or 1,4,7,10,13,16-hexaoxacyclooctadecane dissolved in polar lacquer solvents and/or at least one compound within the molecular weight range of about 32 to 250 which has alcoholic hydroxyl groups and is liquid at room temperature.
This invention also relates to the use of the products of the process according to the invention, optionally freed from monomeric starting polyisocyanate and/or optionally blocked with blocking agents for isocyanate groups, as an isocyanate component in the production of polyurethanes by the isocyanate polyaddition process.
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M/u/ ller Hanns P.
Richter Roland
Wagner Kuno
Bayer Aktiengesellschaft
Ford John M.
Gil Joseph C.
Harsh Gene
Roy Thomas W.
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