C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/154, 260/468
C08G 18/50 (2006.01) C08G 18/10 (2006.01) C08G 18/18 (2006.01) C08G 18/20 (2006.01)
Patent
CA 1248546
POLYAMINES AND A PROCESS FOR THEIR PRODUCTION ABSTRACT OF THE DISCLOSURE Polyamines containing aromatically bound primary amino groups are prepared in a single stage process by hydrolyzing an isocyanate in the presence of a compound containing an amidine and/or guanidine group and a water-miscible, aprotic-dipolar solvent. This hydrolysis is carried out at from 20 to 210°C with the reactants being in substantially homogeneous phase. The isocyanate starting material contains aromatically bound NCO groups and has NCO content of from 0.5 to 40 wt. %. The compound containing amidine and/or guanidine groups functions as a catalyst and is used in a quantity of at least 0.001 parts by weight for every 100 parts by weight of isocyanate. The water-miscible solvent is used in a quantity of at least 10 parts by weight for every 100 parts by weight of polyisocyanate. The polyamines thus-produced are particularly useful in the production of polyurethanes.
516091
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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