Process for the manufacture of polyisocyanurate foams

Details Process for the manufacture of polyisocyanurate foams Process for the manufacture of polyisocyanurate foams

C - Chemistry, Metallurgy

08

G

403/13

C08G 18/16 (2006.01) C08G 18/09 (2006.01) C08G 18/20 (2006.01) C08G 18/46 (2006.01)

Patent

CA 1060149

ABSTRACT OF THE DISCLOSURE In a process for the manufacture of polyisocyanurate foams containing urethane groups by reaction of organic poly- isocyanates and polyols in the presence of a catalyst system with or without further components such as frothing agents, auxiliaries and additives, wherein the improvement consists of using catalytic amounts of a co-catalyst comprising 1,3,5-tris-(N,N-dialkylaminoalkyl)-s-hexahydrotriazine, and an organic mono- or polycarboxylic acid with 1 to 14 carbon atoms, or a monoester of the polycarboxyLic acids; wherein the co-catalyst system is used at a mole ratio of 1,3,5-tris-(N,N-dialkylaminoalkyl)-s-hexahydrotriazine to organic mono- or polycarboxylic acids or monoesters of the polycarboxylic acids of 30:1 to 0.7:1.

254097

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