C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/134
C08G 18/40 (2006.01) C08G 18/78 (2006.01) C08G 18/80 (2006.01)
Patent
CA 1225784
Mo-2601 LeA 22,754 PROCESS FOR THE IN SITU PRODUCTION OF UREA GROUP- CONTAINING ISOCYANATES IN POLYOLS, DISPERSIONS OR SOLUTIONS RESULTING THEREFROM AND USE THEREOF ABSTRACT OF THE DISCLOSURE The invention relates to a process for the in situ production of dispersions or solutions of urea group-containing aromatic isocyanates by the low temperature reaction of aromatic diisocyanates and/or polyisocyanates (the NCO groups of which preferably exhibit different reactivities) with from 0.15 to 0.4 mols of water per NCO equivalent in relatively high molecular weight polyols and in the presence of catalysts accelerating the NCO/water reaction. Such catalysts are preferably selected from peralkylamino- alkyl ethers, peralkylamino-polyalkylene ethers and/or peralkyl polyalkylene-polyamines. The present invention also relates to the resulting metastable solutions or dlspersions and to the use thereof, optionally with the further addition of relatively high and low molecular weight compounds having hydroxyl, amino or hydrazide groups and with the optional addition of other polyiso- cyanates in polyurethane-forming ratios for the produc- tion of polyurethanes. Mo-2601 LeA 22,754
471169
Grogler Gerhard
Hess Heinrich
Kopp Richard
Aktiengesellschaft Bayer
Marcoux & Sher Swabey Mitchell Houle
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