Resinous composition for coating use

Details Resinous composition for coating use Resinous composition for coating use

C - Chemistry, Metallurgy

09

D

402/82

C09D 161/28 (2006.01)

Patent

CA 1318075

Mo-3158 LeA 25,530 A PROCESS FOR THE PRODUCTION OF POLYNUCLEAR AROMATIC POLYAMINES ABSTRACT OF THE INVENTION This invention relates to an improved process for the preparation of polynuclear aromatic polyamines, in which the reaction product is prepared by condensing aniline with fonmaldehyde in the presence of water and acjdic catalysts and is worked up by extraction with a hydrophobic solvent. The acid catalyst that accumulates in the aqueous phase during the extraction process is reused. Le A 25 530

573666

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